SU998747A1 - Installation for rotary-percussive drilling of blast-holes with longitudinal grooves in their walls - Google Patents

Description

The invention relates to installations for percussion rotary drilling of boreholes with longitudinal grooves on the walls, which serve as stress concentrators in the destruction of a rock massif by an explosion.

Widely known are installations for percussion rotary drilling of holes, including a pneumatic or hydraulic hammer drill mounted on a guide beam of a feed mechanism and connected to a drill rod, having an LI drill bit at the end. 1 Known plants are usually mounted on a drill carriage by means of a manipulator and intended for drilling cylindrical boreholes for this technology.

The closest to the technical essence of the invention is an installation for percussion-rotary drilling of holes with longitudinal grooves on the walls, comprising a rod with a drill bit and a rotary sleeve bearing longitudinally located rock-breaking incisors, a perforator connected to the rod and mounted on a guide beam of this mechanism having in front

tZ 3.

This installation provides drilling of bore-holes with simultaneous formation of longitudinal hub grooves on their walls, which, however, are randomly arranged. This circumstance is a definite disadvantage, since the longitudinal grooves, depending on the type of bore-hole, must be oriented in a given way. For example, for a contoured bore hole drill hole, the longitudinal grooves of the drill hole

15 to be oriented in accordance with the contour of the development of the mine in order to avoid excessive breaking of the rock mass outside the design section of the mine.

20

The purpose of the invention is to provide orientation of the grooves on the walls of the drill holes.

This goal is achieved by the fact that in an installation for impact-rotational

25 drilling holes with longitudinal grooves on the walls containing a rod with a drill bit and swivel, a bushing that carries longitudinally located rock-breaking incisors, and a perforator connected to the rod and

mounted on the guide rail of the feeding mechanism, having mounting stops in the front end part, the guide beam is provided with a device for fixing the sleeve with cutters in a predetermined position relative to the rod.

The fixture is made in the form of a spring-loaded sleeve, having a multifaceted opening for fixed mounting on the guide beam support and carrying a vertical stand with a bracket for engaging a sleeve with cutters mounted on the rod.

FIG. 1 shows an installation for impact drilling of a drilled hole; in fig. 2 is a view A of FIG. one; on . - FIG. 3 is a partial view of the installation on an enlarged scale at the location of the fixture; FIG. 4 is a section BB in FIG. 3

The rig for percussion-rotary drilling of bore-holes has a hydraulic or pneumatic perforator 1 (Fig. 1) mounted on a guide beam 2 of a feed mechanism (not shown) fixed on the manipulator 3 of a drilling carriage (not shown). Perforator. 1 connects to the drill rod 4, which is equipped with a drill bit 5 and which rotates the sleeve b with the longitudinally located rock-breaking-cutters 7 to form longitudinal grooves on the walls of the drill hole.

At the front end of the guide beam 2, mounting stops 8 (Fig. 2) are fixed, one of which has an axially movable sleeve 9 carrying a vertical stand 10 with a horizontal bracket 11 interacting with the cutters 7 of the rotary sleeve 6. The axial mobility of the sleeve 9 is ensured a spring count 12 (fig. 3) placed between it and the end of the guide beam 2. In the front part of the sleeve 9, its hole has a mogon-shaped form for fixed connection with the tail part of the stop 8 (fig. 4). The sleeve 9, the post 10, the clamp 11 and the spring 12 together form a device for fixing the sleeve b with the cutters in a predetermined position relative to the rod 4.

Drilling holes while applying longitudinal grooves on their walls is carried out in the following way.

The rotary sleeve b with the cutters 7 is set in the position corresponding to the required direction of the grooves - the stress concentrators with the help of the fixing device. To do this, squeeze the spring 12, shifting

the sleeve 6 in the direction of the end of the beam 2, then turn the sleeve b to the desired angle and install it on the multifaceted tail section of the stop 8. When the atom bracket 11, interact with the cutters 7 of the sleeve b, turns it to the desired angle, setting the desired direction.

Then, using the manipulator 3, the machine is fed to the site of the drilling of the bore, fixed by the stops 8, and the perforator 1 is put into operation, which informs the rod 4 of the strokes and rotation. The drill bit 5, which is rigidly connected to the rod 4, also rotates, and the sleeve b contacts the clamp 11, and its cutters 7 accept the desired position. .

As the hole is deepened, the sleeve with the cutters 7 also enters, into the hole, ezes 7 come out of contact with the clip 11 and apply longitudinal grooves on the walls of the hole.

Due to the application of grooves, a weakening of the massif proceeds, then it allows to destroy it during an explosion in a given direction. Forg / 1ula inventions

Claims (2)

1. An installation for percussion-rotary drilling of holes with longitudinal grooves on the walls, comprising a rod with a drill bit and a rotary sleeve carrying longitudinally located deforming cutters, a perforator connected to the rod and mounted on a guide beam. parts mounting feet, characterized with. By the fact that, in order to ensure the orientation of the groove of the bore-hole walls, the guide beam is provided with a device located in its front part for fixing the sleeve with re. tsami in a predetermined position relative to the rod. . 2. Installation pop. 1, characterized in that the device is made in the form of a spring-loaded sleeve having a multifaceted hole for a fixed installation on the stop of the guide beam and the carrier vertical, stand with a bracket for interaction with the sleeve put on the bar with cutters. Sources of information taken into account in the examination 1. US Patent No. 3807510, cl. 173-160. 1974. 2. USSR author's certificate number 286899, cl. E 21 C 13/08, 1969 (prototype).  ,