CN102914226A - Hollow-hole rhombic parallel cut blasting damping method - Google Patents
Hollow-hole rhombic parallel cut blasting damping method Download PDFInfo
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- CN102914226A CN102914226A CN2012104435272A CN201210443527A CN102914226A CN 102914226 A CN102914226 A CN 102914226A CN 2012104435272 A CN2012104435272 A CN 2012104435272A CN 201210443527 A CN201210443527 A CN 201210443527A CN 102914226 A CN102914226 A CN 102914226A
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- 238000005422 blasting Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000013016 damping Methods 0.000 title claims abstract description 5
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 title abstract 2
- 239000002360 explosive Substances 0.000 claims abstract description 63
- 239000011435 rock Substances 0.000 claims abstract description 15
- 239000000839 emulsion Substances 0.000 claims abstract description 6
- 238000002955 isolation Methods 0.000 claims description 15
- 238000004880 explosion Methods 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 5
- 238000005474 detonation Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 abstract 1
- 239000010438 granite Substances 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 125000004122 cyclic group Chemical group 0.000 description 11
- 238000010276 construction Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000009514 concussion Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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Abstract
本发明涉及一种中空孔直眼菱形掏槽爆破减震方法，在地下隧道掌子面进行爆破掘进，施工方法为：使用潜孔钻机在隧道掌子面中间位置钻一个直径为90mm至180mm的中空孔；使用凿岩机打多个炮孔；所述炮孔包括环绕所述中空孔展开的掏槽眼、辅助眼、周边眼和底板眼；装填炸药和雷管并用炮泥封堵炮孔，采用岩石乳化炸药，使用普通毫秒导爆管雷管或高精度毫秒导爆管雷管；按照炮孔布置顺序及雷管延期时间起爆炸药。本发明的有益效果是：城市地铁在花岗岩地层近距离下穿建（构）筑物，以及较旧的居民房屋时，能够有效地控制爆破振动速度，减少爆破震动对建筑物的影响以及对居民生活的影响，与传统楔形掏槽爆破方案相比，最大爆破振速降低达50%。
The invention relates to a method for blasting and damping blasting of a hollow hole straight-hole rhombic cut. The blasting excavation is carried out on the face of an underground tunnel. Hollow hole; use a rock drill to drill multiple blastholes; the blastholes include cutouts, auxiliary holes, peripheral holes and bottom plate holes around the hollow hole; fill with explosives and detonators and seal the blastholes with blasting mud, using rock Emulsion explosives, using ordinary millisecond nonel detonators or high-precision millisecond nonel detonators; detonate explosives according to the sequence of blast hole arrangement and detonator delay time. The beneficial effect of the present invention is: when the city subway passes through the building (structure) under the granite stratum at a short distance, as well as the older residential buildings, it can effectively control the blasting vibration speed, reduce the impact of the blasting vibration on the building and the impact on the residents. Compared with the traditional wedge cutting blasting scheme, the maximum blasting vibration velocity is reduced by 50%.
Description
Technical field
The invention belongs to the urban transportation tunnel blasting technique, relate in particular to a kind of hollow hole rhomdus cut blasting isolation method, the construction when passing through granitic formation and closely wearing building down for urban subway tunnel.
Background technology
At present, for solving day by day serious Urban Traffic Jam Based, the underground railway in city and outskirts of a town and ground overhead railway and ground rail are linked to be transportation network, are referred to as subway.The many merits such as subway is convenient, fast with it, environmental protection become the prefered method of numerous national solving urban traffic blocking problems.
In the situation that geological conditions is take rock as main, comprehensive various factors, drill bursting construction rely on that its construction cost is low, the advantages such as drivage efficiency is high, easy operating, become the main subway tunnel tunneling construction method of China.Cost is low although the blast working method has, the drivage efficiency advantages of higher, but explosive charge can produce the negative effects such as shock wave, concussion of blasting and toxic gas in its work progress, so the safety problem that in use produces is the critical bottleneck problem that hinders its Popularization And Development always.Especially in the work progress of city tunnel explosion driving, because having under the various unfavorable conditions such as various buildings,, ground shallow at edpth of tunnel carries out the explosion tunneling construction, so, the dither effect that blast working produces becomes the negative effect that at first will control in work progress, if do not control well, will produce serious consequence.
Summary of the invention
The objective of the invention is to propose a kind of technical scheme of hollow hole rhomdus cut blasting isolation method, reduce concussion of blasting to the impact of building and resident living.
To achieve these goals, technical scheme of the present invention is: a kind of hollow hole rhomdus cut blasting isolation method, carry out the explosion driving topping bar of urban subway tunnel face, the step of described a kind of hollow hole rhomdus cut blasting isolation method is:
A) use down-the-hole drill to bore a hollow hole in the centre position that tunnel tunnel face is topped bar;
B) use rock drill to set the big gun hole; Described big gun hole comprises snubber, reliever, periphery hole and the base plate eye that launches around described hollow hole;
C) purge the described big gun of cleaning hole;
D) filling explosive and detonator and stop up the big gun hole with stemming;
E) line is confirmed to detonate after errorless.
The diameter of described hollow hole is 90mm to 180mm, and the degree of depth of hollow hole is 5m to 10m; The degree of depth in described big gun hole is 1m to 2m.
Described explosive is No. 2 rock emulsion explosives.
Described method further is: described detonator adopts common Millisecond Nonel Tube Detonator, described common Millisecond Nonel Tube Detonator is that defer time is the described First Series Millisecond Nonel Tube Detonator of GB GB19474-2003 " Nonel detonator ", use 1～6 section in not 1,4,6 section not, give up need not 2,3,5 sections not, use continuously after the section other 6; Described line is not 1 common Millisecond Nonel Tube Detonator line with section; Described detonating is divided into twice and detonates; At first set hollow hole, snubber, periphery hole, setting in the snubber filling explosive and detonator, periphery hole does not load explosive as the vibration damping hole, the level that distributes centered by hollow hole, with the rhombus explosive in the snubber eye that detonates successively; Then set reliever and base plate eye and together load explosive with periphery hole; Expand quick-fried.
Described method further is: described detonator adopts the high accuracy Millisecond Nonel Tube Detonator, described high accuracy Millisecond Nonel Tube Detonator is to meet the described Nonel detonator of GB GB19474-2003 " Nonel detonator ", described high accuracy Millisecond Nonel Tube Detonator have 60 sections not, defer time is 0ms～12000ms, use 1～20 section in not 1,4,6,8,10,12,14,16,18,20 section not, use continuously after the section other 20; Set described hollow hole and whole snubber, reliever, periphery hole, base plate eye, filling explosive and detonator in snubber, reliever, periphery hole, base plate eye use the low energy fuse connection and ignite described detonator; Described detonating is once detonation; Explosive in each big gun hole successively detonates centered by hollow hole.
The invention has the beneficial effects as follows: when carrying out the explosion driving, because the clamping action of rock is larger, so compare with other borehole, the vibration velocity that the snubber of first explosion causes is maximum.Reduce the Explosive Vibrating Velocity of snubber for the clamping action that reduces rock, adopt the hollow hole rhomdus cut, take full advantage of hollow hole as the effect of the scope of freedom and compensation space, effectively reduce Explosive Vibrating Velocity.Reduce concussion of blasting on the impact of buildings or structures with on the impact of resident living, make underground construction smoothly by sensitizing ranges such as buildings or structures.
Below in conjunction with drawings and Examples the present invention is made a detailed description.
Description of drawings
Fig. 1 is that the present invention adopts common Millisecond Nonel Tube Detonator big gun pore size distribution figure;
Fig. 2 is that the common Millisecond Nonel Tube Detonator section of the present invention does not distribute and blasting sequence figure;
Fig. 3 is that the present invention adopts high accuracy Millisecond Nonel Tube Detonator big gun pore size distribution figure;
Fig. 4 is the other distribution map of high accuracy Millisecond Nonel Tube Detonator section of the present invention;
Fig. 5 is low energy fuse connection diagram of the present invention
The common Millisecond Nonel Tube Detonator defer time of Fig. 6 table;
Fig. 7 high accuracy Millisecond Nonel Tube Detonator defer time table
The specific embodiment
Embodiment one,
The present embodiment discloses and adopted common Millisecond Nonel Tube Detonator, cyclic advance is three kinds of blasting scheme of 1.0m, 1.5m, 2.0m.Described common Millisecond Nonel Tube Detonator is that defer time is the described First Series Millisecond Nonel Tube Detonator of GB GB19474-2003 " Nonel detonator ";
Such as Fig. 1, Fig. 2, a kind of hollow hole rhomdus cut blasting isolation method is carried out explosion driving topping bar of subterranean tunnel face, and the described face width dimensions of topping bar is that L=6200mm, height dimension are L0=3200mm; The hollow hole C that to be provided with a diameter in the tunnel tunnel face centre position be 150mm, the degree of depth of hollow hole is 10m; Be provided with the big gun hole at face around hollow hole, described big gun hole comprises that 16 snubbers that launch around described hollow hole (are positioned at the face middle part of topping bar and are used as Cut Blasting, such as the hole that is connected by dotted line H among Fig. 1), 29 relievers that launch around the described snubber outside (are positioned in the face outline line of topping bar, such as the hole that is connected by dotted line A among Fig. 1), 27 periphery holes that are positioned at the reliever outside (are positioned on the outline line of face except base plate of topping bar, such as the hole that is connected by dotted line S among Fig. 1), the base plate eye that 8 levels equidistantly distribute (is positioned on the face base plate outline line of topping bar, such as the hole that is connected by dotted line B among Fig. 1), wherein, reliever is between snubber and periphery hole; Each big gun hole centre-to-centre spacing is of a size of:
L1=400mm，L2=700mm，L3=600mm，L4=1600mm，L5=350mm，L6=500mm；
When adopting common Millisecond Nonel Tube Detonator explosion, because other restriction of largest segment section, therefore adopt gradation to detonate; The step of construction method is:
A) use down-the-hole drill to bore hollow hole C in the tunnel tunnel face centre position;
B) use rock drill to set 16 snubbers (such as the hole that is connected by two-dot chain line among Fig. 2) and 27 periphery holes;
C) use high-pressure blast to purge the big gun hole that cleaning has set;
D) filling explosive and detonator in setting 16 snubbers (hole that is connected by two-dot chain line in such as Fig. 2) stop up the big gun hole with stemming; Described explosive is No. 2 rock emulsion explosives, and described detonator adopts common Millisecond Nonel Tube Detonator, uses 1～6 section in not 1,4,6 section not, give up need not 2,3,5 sections not, use continuously after the section other 6; Numbering among Fig. 2 by each hole is that the section of Nonel detonator is other; The periphery hole that has set does not load explosive as the vibration damping hole;
E) be not 1 common Millisecond Nonel Tube Detonator line with section, confirm to detonate after errorless, carry out Cut Blasting, centered by hollow hole, with the level of rhombus distribution successively detonating charge (as shown in Figure 2 rhombus two-dot chain line);
F) use rock drill to set reliever and base plate eye;
G) purge cleaning reliever and base plate eye;
H) filling explosive and detonator in setting big gun hole (comprising reliever, periphery hole, base plate eye) stop up the big gun hole with stemming; Described explosive is No. 2 rock emulsion explosives, and described detonator adopts common Millisecond Nonel Tube Detonator, uses 1～6 section in not 1,4,6 section not, give up need not 2,3,5 sections not, use continuously after the section other 6; Among Fig. 2 the other numbering in each hole be Nonel detonator section not, the section in the hole of the other nil in hole Wei not connect the numbering of the dotted line in this hole;
E) be not 1 common Millisecond Nonel Tube Detonator line with section, confirm to detonate after errorless, expand the groove explosion, the explosive in each big gun hole of detonating the successively hole of dotted line connection (as shown in Figure 2 by);
When described cyclic advance was 1.0m, all the degree of depth in big gun hole was 1.0m; The number in the big gun hole of detonating of Cut Blasting, Nonel detonator section be not and explosive payload such as following table:
| Big gun hole title | The big gun number of perforations | The detonator section is other | Single hole explosive payload (kg) | Single hop explosive payload (kg) |
| Snubber | 1 | 1 | 0.3 | 0.3 |
| Snubber | 1 | 4 | 0.3 | 0.3 |
| Snubber | 1 | 6 | 0.3 | 0.3 |
| Snubber | 1 | 7 | 0.3 | 0.3 |
| Snubber | 1 | 8 | 0.3 | 0.3 |
| Snubber | 1 | 9 | 0.3 | 0.3 |
| Snubber | 1 | 10 | 0.3 | 0.3 |
| Snubber | 1 | 11 | 0.3 | 0.3 |
| Snubber | 1 | 12 | 0.3 | 0.3 |
| Snubber | 1 | 13 | 0.3 | 0.3 |
| Snubber | 1 | 14 | 0.3 | 0.3 |
| Snubber | 1 | 15 | 0.3 | 0.3 |
| Snubber | 1 | 16 | 0.3 | 0.3 |
| Snubber | 1 | 17 | 0.3 | 0.3 |
| Snubber | 1 | 18 | 0.3 | 0.3 |
| Snubber | 1 | 19 | 0.3 | 0.3 |
| Add up to | 16 | ? | ? | 4.8 |
When described cyclic advance is 1.0m, the number, Nonel detonator section that expands the big gun hole of detonating of groove explosion not and explosive payload such as following table:
| Big gun hole title | The big gun number of perforations | The detonator section is other | Single hole explosive payload (kg) | Single hop explosive payload (kg) |
| Reliever | 3 | 1 | 0.3 | 0.9 |
| Reliever | 3 | 4 | 0.3 | 0.9 |
| Reliever | 2 | 6 | 0.3 | 0.6 |
| Reliever | 2 | 7 | 0.3 | 0.6 |
| Reliever | 2 | 8 | 0.3 | 0.6 |
| Reliever | 6 | 9 | 0.2 | 1.2 |
| Reliever | 6 | 10 | 0.2 | 1.2 |
| Reliever | 5 | 11 | 0.2 | 1.0 |
| Periphery |
6 | 12 | 0.15 | 0.9 |
| Periphery |
6 | 13 | 0.15 | 0.9 |
| Periphery hole | 5 | 14 | 0.15 | 0.75 |
| Periphery |
5 | 15 | 0.15 | 0.75 |
| Periphery |
5 | 16 | 0.15 | 0.75 |
| The |
3 | 17 | 0.3 | 0.9 |
| The |
3 | 18 | 0.3 | 0.9 |
| The |
1 | 19 | 0.45 | 0.45 |
| The |
1 | 20 | 0.45 | 0.45 |
| Add up to | 64 | ? | ? | 13.75 |
When described cyclic advance was 1.5m, all the degree of depth in big gun hole was 1.5m; The number in the big gun hole of detonating of Cut Blasting, Nonel detonator section be not and explosive payload such as following table:
| Big gun hole title | The big gun number of perforations | The detonator section is other | Single hole explosive payload (kg) | Single hop explosive payload (kg) |
| Snubber | 1 | 1 | 0.45 | 0.45 |
| Snubber | 1 | 4 | 0.45 | 0.45 |
| Snubber | 1 | 6 | 0.45 | 0.45 |
| Snubber | 1 | 7 | 0.45 | 0.45 |
| Snubber | 1 | 8 | 0.45 | 0.45 |
| Snubber | 1 | 9 | 0.45 | 0.45 |
| Snubber | 1 | 10 | 0.45 | 0.45 |
| Snubber | 1 | 11 | 0.45 | 0.45 |
| Snubber | 1 | 12 | 0.45 | 0.45 |
| Snubber | 1 | 13 | 0.45 | 0.45 |
| Snubber | 1 | 14 | 0.45 | 0.45 |
| Snubber | 1 | 15 | 0.45 | 0.45 |
| Snubber | 1 | 16 | 0.45 | 0.45 |
| Snubber | 1 | 17 | 0.45 | 0.45 |
| Snubber | 1 | 18 | 0.45 | 0.45 |
| Snubber | 1 | 19 | 0.45 | 0.45 |
| Add up to | 16 | ? | ? | 7.2 |
When described cyclic advance is 1.5m, the number, Nonel detonator section that expands the big gun hole of detonating of groove explosion not and explosive payload such as following table:
| Big gun hole title | The big gun number of perforations | The detonator section is other | Single hole explosive payload (kg) | Single hop explosive payload (kg) |
| Reliever | 3 | 1 | 0.45 | 1.35 |
| Reliever | 3 | 4 | 0.45 | 1.35 |
| Reliever | 2 | 6 | 0.45 | 0.9 |
| Reliever | 2 | 7 | 0.45 | 0.9 |
| Reliever | 2 | 8 | 0.45 | 0.9 |
| Reliever | 6 | 9 | 0.3 | 1.8 |
| Reliever | 6 | 10 | 0.3 | 1.8 |
| Reliever | 5 | 11 | 0.3 | 1.5 |
| Periphery |
6 | 12 | 0.2 | 1.2 |
| Periphery |
6 | 13 | 0.2 | 1.2 |
| Periphery |
5 | 14 | 0.2 | 1.0 |
| Periphery |
5 | 15 | 0.2 | 1.0 |
| Periphery |
5 | 16 | 0.2 | 1.0 |
| The |
3 | 17 | 0.45 | 1.35 |
| The |
3 | 18 | 0.45 | 1.35 |
| The |
1 | 19 | 0.45 | 0.45 |
| The |
1 | 20 | 0.45 | 0.45 |
| Add up to | 64 | ? | ? | 19.5 |
When described cyclic advance was 2.0m, all the degree of depth in big gun hole was 2.0m; The number in the big gun hole of detonating of Cut Blasting, Nonel detonator section be not and explosive payload such as following table:
| Big gun hole title | The big gun number of perforations | The detonator section is other | Single hole explosive payload (kg) | Single hop explosive payload (kg) |
| Snubber | 1 | 1 | 0.45 | 0.6 |
| Snubber | 1 | 4 | 0.45 | 0.6 |
| Snubber | 1 | 6 | 0.45 | 0.6 |
| Snubber | 1 | 7 | 0.45 | 0.6 |
| Snubber | 1 | 8 | 0.45 | 0.6 |
| Snubber | 1 | 9 | 0.45 | 0.6 |
| Snubber | 1 | 10 | 0.45 | 0.6 |
| Snubber | 1 | 11 | 0.45 | 0.6 |
| Snubber | 1 | 12 | 0.45 | 0.6 |
| Snubber | 1 | 13 | 0.45 | 0.6 |
| Snubber | 1 | 14 | 0.45 | 0.6 |
| Snubber | 1 | 15 | 0.45 | 0.6 |
| Snubber | 1 | 16 | 0.45 | 0.6 |
| Snubber | 1 | 17 | 0.45 | 0.6 |
| Snubber | 1 | 18 | 0.45 | 0.6 |
| Snubber | 1 | 19 | 0.45 | 0.6 |
| Add up to | 16 | ? | ? | 9.6 |
When described cyclic advance is 2.0m, the number, Nonel detonator section that expands the big gun hole of detonating of groove explosion not and explosive payload such as following table:
| Big gun hole title | The big gun number of perforations | The detonator section is other | Single hole explosive payload (kg) | Single hop explosive payload (kg) |
| Reliever | 3 | 1 | 0.6 | 1.8 |
| Reliever | 3 | 4 | 0.6 | 1.8 |
| Reliever | 2 | 6 | 0.6 | 1.2 |
| Reliever | 2 | 7 | 0.6 | 1.2 |
| Reliever | 2 | 8 | 0.6 | 1.2 |
| Reliever | 6 | 9 | 0.45 | 2.7 |
| Reliever | 6 | 10 | 0.45 | 2.7 |
| Reliever | 5 | 11 | 0.45 | 2.25 |
| Periphery |
6 | 12 | 0.3 | 1.8 |
| Periphery |
6 | 13 | 0.3 | 1.8 |
| Periphery |
5 | 14 | 0.3 | 1.5 |
| Periphery |
5 | 15 | 0.3 | 1.5 |
| Periphery |
5 | 16 | 0.3 | 1.5 |
| The |
3 | 17 | 0.6 | 1.8 |
| The |
3 | 18 | 0.6 | 1.8 |
| The |
1 | 19 | 0.6 | 0.6 |
| The |
1 | 20 | 0.6 | 0.6 |
| Add up to | 64 | ? | ? | 27.75 |
Common Millisecond Nonel Tube Detonator defer time table is seen Fig. 6.
Embodiment two,
The present embodiment discloses and adopted high accuracy Millisecond Nonel Tube Detonator, cyclic advance is three kinds of blasting scheme of 1.0m, 1.5m, 2.0m; Described high accuracy Millisecond Nonel Tube Detonator is to meet the described Nonel detonator of GB GB19474-2003 " Nonel detonator ", described high accuracy Millisecond Nonel Tube Detonator have 60 sections not, defer time is 0ms～12000ms.
Such as Fig. 3, Fig. 4, a kind of hollow hole rhomdus cut blasting isolation method is carried out explosion driving topping bar of subterranean tunnel face, and the described face width dimensions of topping bar is that L=6200mm, height dimension are L0=3200mm; The step of described a kind of hollow hole rhomdus cut blasting isolation method is:
A) use down-the-hole drill to bore a diameter in the tunnel tunnel face centre position and be the hollow hole C of 150mm, the degree of depth of hollow hole is 10m;
B) use the rock drill hole of setting off firecrackers, described big gun hole comprises that 16 snubbers that launch around described hollow hole (are positioned at the face middle part of topping bar and are used as Cut Blasting, such as the hole that is connected by dotted line H among Fig. 3), 29 relievers that launch around the described snubber outside (are positioned in the face outline line of topping bar, such as the hole that is connected by dotted line A among Fig. 3), 27 periphery holes that are positioned at the reliever outside (are positioned on the outline line of face except base plate of topping bar, such as the hole that is connected by dotted line S among Fig. 3), the base plate eye that 8 levels equidistantly distribute (is positioned on the face base plate outline line of topping bar, such as the hole that is connected by dotted line B among Fig. 3), wherein, reliever is between snubber and periphery hole; Each big gun hole centre-to-centre spacing is of a size of:
L1=400mm，L2=700mm，L3=600mm，L4=1600mm，L5=350mm，L6=500mm；
C) use high-pressure blast to purge the described big gun of cleaning hole;
D) filling explosive and detonator stop up the big gun hole with stemming; Described explosive is No. 2 rock emulsion explosives, and described detonator adopts high precision fuse blasting cap, uses 1～20 section in not 1,4,6,8,10,12,14,16,18,20 section not, continuously uses after the section other 20; Among Fig. 4 the other numbering in each hole be Nonel detonator section not, the section in the hole of the other nil in hole Wei not connect the numbering of the dotted line in this hole; Such as Fig. 5, use low energy fuse (solid line E among Fig. 5) to connect described detonator (dotted line D among Fig. 5), the two-dot chain line among Fig. 5 is the outline line of topping bar of subterranean tunnel face.
E) confirm to detonate after errorless whole big guns hole of detonating successively, the level that wherein at first distributes centered by hollow hole, with the rhombus explosive (as shown in Figure 4 rhombus two-dot chain line) in the snubber that detonates successively.
When described cyclic advance was 1.0m, all the degree of depth in big gun hole was 1.0m; Detonate the big gun hole number, Nonel detonator section not and explosive payload such as following table:
| Big gun hole title | The big gun number of perforations | The detonator section is other | Single hole explosive payload (kg) | Single hop explosive payload (kg) |
| Snubber | 1 | 1 | 0.3 | 0.3 |
| Snubber | 1 | 4 | 0.3 | 0.3 |
| Snubber | 1 | 6 | 0.3 | 0.3 |
| Snubber | 1 | 8 | 0.3 | 0.3 |
| Snubber | 1 | 10 | 0.3 | 0.3 |
| Snubber | 1 | 12 | 0.3 | 0.3 |
| Snubber | 1 | 14 | 0.3 | 0.3 |
| Snubber | 1 | 16 | 0.3 | 0.3 |
| Snubber | 1 | 18 | 0.3 | 0.3 |
| Snubber | 1 | 20 | 0.3 | 0.3 |
| Snubber | 1 | 21 | 0.3 | 0.3 |
| Snubber | 1 | 22 | 0.3 | 0.3 |
| Snubber | 1 | 23 | 0.3 | 0.3 |
| Snubber | 1 | 24 | 0.3 | 0.3 |
| Snubber | 1 | 25 | 0.3 | 0.3 |
| Snubber | 1 | 26 | 0.3 | 0.3 |
| Reliever | 1 | 27 | 0.3 | 0.3 |
| Reliever | 1 | 28 | 0.3 | 0.3 |
| Reliever | 1 | 29 | 0.3 | 0.3 |
| Reliever | 1 | 30 | 0.3 | 0.3 |
| Reliever | 1 | 31 | 0.3 | 0.3 |
| Reliever | 1 | 32 | 0.3 | 0.3 |
| Reliever | 1 | 33 | 0.3 | 0.3 |
| Reliever | 1 | 34 | 0.3 | 0.3 |
| Reliever | 1 | 35 | 0.3 | 0.3 |
| Reliever | 1 | 36 | 0.3 | 0.3 |
| Reliever | 2 | 37 | 0.2 | 0.4 |
| Reliever | 2 | 38 | 0.2 | 0.4 |
| Reliever | 2 | 39 | 0.2 | 0.4 |
| Reliever | 2 | 40 | 0.2 | 0.4 |
| Reliever | 2 | 41 | 0.2 | 0.4 |
| Reliever | 2 | 42 | 0.2 | 0.4 |
| Reliever | 2 | 43 | 0.2 | 0.4 |
| Reliever | 2 | 44 | 0.2 | 0.4 |
| Reliever | 3 | 45 | 0.2 | 0.6 |
| Periphery hole | 4 | 46 | 0.15 | 0.6 |
| Periphery hole | 4 | 47 | 0.15 | 0.6 |
| Periphery hole | 4 | 48 | 0.15 | 0.6 |
| Periphery hole | 4 | 49 | 0.15 | 0.6 |
| Periphery hole | 4 | 50 | 0.15 | 0.6 |
| Periphery hole | 4 | 51 | 0.15 | 0.6 |
| Periphery hole | 3 | 52 | 0.15 | 0.6 |
| The base plate eye | 2 | 53 | 0.3 | 0.6 |
| The base plate eye | 2 | 54 | 0.3 | 0.6 |
| The base plate eye | 2 | 55 | 0.3 | 0.6 |
| The base plate eye | 1 | 56 | 0.45 | 0.45 |
| The base plate eye | 1 | 57 | 0.45 | 0.45 |
| Add up to | 80 | ? | ? | 18.5 |
When described cyclic advance was 1.5m, all the degree of depth in big gun hole was 1.5m; Detonate the big gun hole number, Nonel detonator section not and explosive payload such as following table:
| Big gun hole title | The big gun number of perforations | The detonator section is other | Single hole explosive payload (kg) | Single hop explosive payload (kg) |
| Snubber | 1 | 1 | 0.45 | 0.45 |
| Snubber | 1 | 4 | 0.45 | 0.45 |
| Snubber | 1 | 6 | 0.45 | 0.45 |
| Snubber | 1 | 8 | 0.45 | 0.45 |
| Snubber | 1 | 10 | 0.45 | 0.45 |
| Snubber | 1 | 12 | 0.45 | 0.45 |
| Snubber | 1 | 14 | 0.45 | 0.45 |
| Snubber | 1 | 16 | 0.45 | 0.45 |
| Snubber | 1 | 18 | 0.45 | 0.45 |
| Snubber | 1 | 20 | 0.45 | 0.45 |
| Snubber | 1 | 21 | 0.45 | 0.45 |
| Snubber | 1 | 22 | 0.45 | 0.45 |
| Snubber | 1 | 23 | 0.45 | 0.45 |
| Snubber | 1 | 24 | 0.45 | 0.45 |
| Snubber | 1 | 25 | 0.45 | 0.45 |
| Snubber | 1 | 26 | 0.45 | 0.45 |
| Reliever | 1 | 27 | 0.45 | 0.45 |
| Reliever | 1 | 28 | 0.45 | 0.45 |
| Reliever | 1 | 29 | 0.45 | 0.45 |
| Reliever | 1 | 30 | 0.45 | 0.45 |
| Reliever | 1 | 31 | 0.45 | 0.45 |
| Reliever | 1 | 32 | 0.45 | 0.45 |
| Reliever | 1 | 33 | 0.45 | 0.45 |
| Reliever | 1 | 34 | 0.45 | 0.45 |
| Reliever | 1 | 35 | 0.45 | 0.45 |
| Reliever | 1 | 36 | 0.45 | 0.45 |
| Reliever | 2 | 37 | 0.3 | 0.6 |
| Reliever | 2 | 38 | 0.3 | 0.6 |
| Reliever | 2 | 39 | 0.3 | 0.6 |
| Reliever | 2 | 40 | 0.3 | 0.6 |
| Reliever | 2 | 41 | 0.3 | 0.6 |
| Reliever | 2 | 42 | 0.3 | 0.6 |
| Reliever | 2 | 43 | 0.3 | 0.6 |
| Reliever | 2 | 44 | 0.3 | 0.6 |
| Reliever | 3 | 45 | 0.3 | 0.9 |
| Periphery hole | 4 | 46 | 0.2 | 0.8 |
| Periphery hole | 4 | 47 | 0.2 | 0.8 |
| Periphery hole | 4 | 48 | 0.2 | 0.8 |
| Periphery hole | 4 | 49 | 0.2 | 0.8 |
| Periphery hole | 4 | 50 | 0.2 | 0.8 |
| Periphery hole | 4 | 51 | 0.2 | 0.8 |
| Periphery hole | 3 | 52 | 0.2 | 0.6 |
| The base plate eye | 2 | 53 | 0.45 | 0.9 |
| The base plate eye | 2 | 54 | 0.45 | 0.9 |
| The base plate eye | 2 | 55 | 0.45 | 0.9 |
| The base plate eye | 1 | 56 | 0.6 | 0.6 |
| The base plate eye | 1 | 57 | 0.6 | 0.6 |
| Add up to | 80 | ? | ? | 26.7 |
When described cyclic advance was 2.0m, all the degree of depth in big gun hole was 2.0m; Detonate the big gun hole number, Nonel detonator section not and explosive payload such as following table:
| Big gun hole title | The big gun number of perforations | The detonator section is other | Single hole explosive payload (kg) | Single hop explosive payload (kg) |
| Snubber | 1 | 1 | 0.6 | 0.6 |
| Snubber | 1 | 4 | 0.6 | 0.6 |
| Snubber | 1 | 6 | 0.6 | 0.6 |
| Snubber | 1 | 8 | 0.6 | 0.6 |
| Snubber | 1 | 10 | 0.6 | 0.6 |
| Snubber | 1 | 12 | 0.6 | 0.6 |
| Snubber | 1 | 14 | 0.6 | 0.6 |
| Snubber | 1 | 16 | 0.6 | 0.6 |
| Snubber | 1 | 18 | 0.6 | 0.6 |
| Snubber | 1 | 20 | 0.6 | 0.6 |
| Snubber | 1 | 21 | 0.6 | 0.6 |
| Snubber | 1 | 22 | 0.6 | 0.6 |
| Snubber | 1 | 23 | 0.6 | 0.6 |
| Snubber | 1 | 24 | 0.6 | 0.6 |
| Snubber | 1 | 25 | 0.6 | 0.6 |
| Snubber | 1 | 26 | 0.6 | 0.6 |
| Reliever | 1 | 27 | 0.6 | 0.6 |
| Reliever | 1 | 28 | 0.6 | 0.6 |
| Reliever | 1 | 29 | 0.6 | 0.6 |
| Reliever | 1 | 30 | 0.6 | 0.6 |
| Reliever | 1 | 31 | 0.6 | 0.6 |
| Reliever | 1 | 32 | 0.6 | 0.6 |
| Reliever | 1 | 33 | 0.6 | 0.6 |
| Reliever | 1 | 34 | 0.6 | 0.6 |
| Reliever | 1 | 35 | 0.6 | 0.6 |
| Reliever | 1 | 36 | 0.6 | 0.6 |
| Reliever | 2 | 37 | 0.45 | 0.9 |
| Reliever | 2 | 38 | 0.45 | 0.9 |
| Reliever | 2 | 39 | 0.45 | 0.9 |
| Reliever | 2 | 40 | 0.45 | 0.9 |
| Reliever | 2 | 41 | 0.45 | 0.9 |
| Reliever | 2 | 42 | 0.45 | 0.9 |
| Reliever | 2 | 43 | 0.45 | 0.9 |
| Reliever | 2 | 44 | 0.45 | 0.9 |
| Reliever | 3 | 45 | 0.45 | 1.35 |
| Periphery hole | 4 | 46 | 0.3 | 1.2 |
| Periphery hole | 4 | 47 | 0.3 | 1.2 |
| Periphery hole | 4 | 48 | 0.3 | 1.2 |
| Periphery hole | 4 | 49 | 0.3 | 1.2 |
| Periphery hole | 4 | 50 | 0.3 | 1.2 |
| Periphery hole | 4 | 51 | 0.3 | 1.2 |
| Periphery hole | 3 | 52 | 0.3 | 0.9 |
| The base plate eye | 2 | 53 | 0.3 | 0.6 |
| The base plate eye | 2 | 54 | 0.3 | 0.6 |
| The base plate eye | 2 | 55 | 0.3 | 0.6 |
| The base plate eye | 1 | 56 | 0.6 | 0.6 |
| The base plate eye | 1 | 57 | 0.6 | 0.6 |
| Add up to | 80 | ? | ? | 35.25 |
High accuracy Millisecond Nonel Tube Detonator defer time table is seen Fig. 7.
Above embodiment is applied in the five river running tunnel constructions of Qingdao subway, and left line passes through 6 skyscrapers, and 4 skyscrapers are passed through on the right side, and the face top only is 4m apart from building anti-float anchor rod beeline; 4 residential buildings are passed through in subway west, Qingdao forever running tunnel in left line ZK23+420 to ZK23+720 mileage scope, the tunnel passes through 3 residential buildings in right line YK23+450 to YK23+720 mileage scope, and the buried depth minimum range is 17m.
In the application of above embodiment, Blasting Vibration Velocity can be controlled at below the 1.5cm/s.
Claims (6)
1. a hollow hole rhomdus cut blasting isolation method is carried out the explosion driving topping bar of urban subway tunnel face, it is characterized in that, the step of described a kind of hollow hole rhomdus cut blasting isolation method is:
A) use down-the-hole drill to bore a hollow hole in the centre position that tunnel tunnel face is topped bar;
B) use rock drill to set the big gun hole; Described big gun hole comprises snubber, reliever, periphery hole and the base plate eye that launches around described hollow hole;
C) purge the described big gun of cleaning hole;
D) filling explosive and detonator and stop up the big gun hole with stemming;
E) line is confirmed to detonate after errorless.
2. a kind of hollow hole rhomdus cut blasting isolation method according to claim 1 is characterized in that, the diameter of described hollow hole is 90mm to 180mm, and the degree of depth of hollow hole is 5m to 10m; The degree of depth in described big gun hole is 1m to 2m.
3. a kind of hollow hole rhomdus cut blasting isolation method according to claim 1 is characterized in that, described explosive is No. 2 rock emulsion explosives.
4. a kind of hollow hole rhomdus cut blasting isolation method according to claim 1, it is characterized in that, described method further is: described detonator adopts common Millisecond Nonel Tube Detonator, described common Millisecond Nonel Tube Detonator is that defer time is the described First Series Millisecond Nonel Tube Detonator of GB GB19474-2003 " Nonel detonator ", use 1～6 section in not 1,4,6 section not, give up need not 2,3,5 sections not, use continuously after the section other 6; Described line is not 1 common Millisecond Nonel Tube Detonator line with section; Described detonating is divided into twice and detonates; At first set hollow hole, snubber, periphery hole, setting in the snubber filling explosive and detonator, periphery hole does not load explosive as the vibration damping hole, the level that distributes centered by hollow hole, with the rhombus explosive in the snubber eye that detonates successively; Then set reliever and base plate eye and together load explosive with periphery hole; Expand quick-fried.
5. a kind of hollow hole rhomdus cut blasting isolation method according to claim 1, it is characterized in that, described method further is: described detonator adopts the high accuracy Millisecond Nonel Tube Detonator, described high accuracy Millisecond Nonel Tube Detonator is to meet the described Nonel detonator of GB GB19474-2003 " Nonel detonator ", described high accuracy Millisecond Nonel Tube Detonator have 60 sections not, defer time is 0ms～12000ms, use 1～20 section in not 1,4,6,8,10,12,14,16,18,20 section not, use continuously after the section other 20; Set described hollow hole and whole snubber, reliever, periphery hole, base plate eye, filling explosive and detonator in snubber, reliever, periphery hole, base plate eye, described detonating is once detonation; Explosive in each big gun hole successively detonates centered by hollow hole.
6. a kind of hollow hole rhomdus cut blasting isolation method according to claim 5 is characterized in that, uses the low energy fuse connection and ignites described detonator.
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| CN112161534A (en) * | 2020-10-16 | 2021-01-01 | 重庆大学 | One-step mining control blasting method for mine underground upward access |
| CN112161534B (en) * | 2020-10-16 | 2022-06-03 | 重庆大学 | A one-step recovery controlled blasting method for underground mine upward approach |
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| CN112880499A (en) * | 2021-02-01 | 2021-06-01 | 中交路桥北方工程有限公司 | Smooth blasting method for tunnel weak surrounding rock |
| WO2022198842A1 (en) * | 2021-03-24 | 2022-09-29 | 山东科技大学 | Hollow-hole burn cut three-time blasting method |
| CN112945036A (en) * | 2021-04-12 | 2021-06-11 | 中电建十一局工程有限公司 | Long-length-advancing drilling and blasting method for small-section tunnel |
| CN112945036B (en) * | 2021-04-12 | 2024-03-12 | 中电建十一局工程有限公司 | Drilling and blasting method for long-entering ruler of small-section tunnel |
| CN113091542A (en) * | 2021-04-29 | 2021-07-09 | 中铁六局集团有限公司 | Railway blasting construction method |
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