SU1337517A1 - Method of combined underground/open mining of coal beds - Google Patents

Abstract

The invention relates to mining industry and allows the complex to be brought to the surface by eliminating damage to mechanized supports from increasing rock pressure and increasing safety measures. The mechanized complex is assembled and put into operation from the pit’s side or the trench undergone, which has opened up in the sediments with its advancement in the extraction column along the fall, and then after the rise of the formation. The roof is completely collapsed. With the approach of the clearing intake to the distance of the step of the roof collapse from the pit wall or the opening trench from the said board to a length equal to the length of the lava, rocks are removed in a volume equal to V (Mm) L l, m, where M is the thickness of the overburden rocks, m ; j- power of rocks left in the roof, m; RK carrying support lining, t / m; j-- rock density, L is the distance from the bottom to the side of the pit (trench), m; 1 - the length of the lava, m, after which, in the process of advancing the clearing hole, the roof is controlled by rubble strips and pneumatic balloon fires located between them. After the output of the complex, the fires are removed to the surface. 5 il. (Gso with SP

Description

13

The invention relates to the field of mining industry and can be used in open pit mining of coal plates using mechanized complexes.

The aim of the invention is to ensure the withdrawal of the complex to the surface due to the exclusion of damage to the institute of mechanized support from increasing rock pressure and increased safety measures.

FIG. 1 shows a diagram of the excavation section, a plan view; in fig. 2 is a sectional view of FIG. 1 (the occurrence of an emergency situation in the lava at the exit of the complex to the surface); in fig. 3 is a diagram of the implementation of the proposed method; in fig. 4 - clearing face, plan view; in fig. 5 is a section BB in FIG. four.

The open-pit coal mining method is carried out as follows.

Mechanized complex 1 is mounted on the earth's surface and put into operation from the bottom of pit 2 with its movement along the dip of the bed. After reaching the boundaries of the column or panel, the mechanized complex is deployed in the plane of the reservoir and the next one is worked out, but already with the advancement of the complex due to the rise of the reservoir. The roof is completely collapsed, and the step of each successive collapse 3 is known. The final successive collapse of the roof without adverse consequences for the complex will be a collapse at the bottom line position 4, in which the remaining part of the rock is located between line 4 and the open pit. (trenches) 5, larger in size (size) and weight than the rock within the next step, collapse 3, since in this case pinching the rock console above the support (slaughter) would be sufficient to break the console in m the case of rock takes The position of FIG. 2, and there will be a crushing of the pillar 6 and damage to the mechanized complex.

Thus, after the last regular collapse of the main roof at the position of the bottom line 4, it is necessary for the safe operation of the bridge.

transfer to the earth's surface, go from roofing to a complete collapse on the method of holding the roof on the rubble strips 6 erected in front of the removable pillar and pneumatic timbers 7 installed between the strips, as well as removing some of the rocks 8 from the pit 5 where the complex is erected.

The volume of rocks to be removed is determined by the formula V (M-m) L-l, m,

where M is the thickness of overlying rocks, m;

L is the distance from the bottom of the pit (trench), m;

1 - the length of the lava, m;

Pi;

P1-D is the thickness of rocks left in the roof, m; Р - bearing capacity of support, t / m.

The removal of rocks is carried out at a distance equal to the length of the lava using a bulldozer or an excavator installed in a quarry. After the required amount of rock has been harvested, the complex is brought to the surface.

Claims (1)

Invention Formula The method of open-pit coal mining, including the installation of a mechanized complex and putting it into operation from the open pit or through a trench, which has penetrated the sediments, pushing the clearing slab in the extraction column in the fall, and then in the uprising of the reservoir with the emergence of the mechanized complex to the surface and control the roof is a complete collapse, in order to ensure that the complex is brought to the surface by eliminating damage to mechanized roof supports from the increasing mountain safety measures, at the approach of the clearing slab at the distance of the step of the roof collapse from the pit or pit trench from the said board to a length equal to the length of the lava, rocks are removed in a volume V equal to V (M-m) L-l, m, where M is the thickness of the overlying rocks, m; power of rocks left in the roof, m; load bearing capacity. t / density of rocks, t / m; distance from the bottom to the side of the pit (trench), m; lava length, m After that, in the process of moving the clearing bottom, the roof is controlled by clump strips and pneumatic balloon fires located between them, which are removed after the mechanized complex reaches the earth's surface. fig.Z V srigL L one  v / i // Compiled by S. Sopilko Editor M. Bandura Tehred M. Khodanych Proofreader A. T sko Order 4106/28 Circulation 454 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5 Production and printing company, Uzhgorod, st. Project, 4