SU979611A1 - Apparatus for thermal-mechanical breaking of rock - Google Patents

Description

(54) DEVICE FOR THERMOMECHANICAL DESTRUCTION OF MOUNTAIN BREEDS

The invention relates to devices for the thermomechanical destruction of thier rocks and can be used to form gaps of large extent, for example, in the extraction and cutting of large blocks of natural stone.

A known machine for forming slacks in a rock massif with the help of several fire-jet burners, which are mounted with rods on a lever pivoted in a vertical plane and fixed to the base frame of the chassis of the machine tl.

However, the use of this machine is limited only to thermally destructive rocks due to the use of only fire-burners.

The closest to the technical solution of the present invention is a device for the thermomechanical destruction of rocks by jets of hot gas with an abrasive, containing a housing connected to the drill rod, having a slurry pipe communicated with the rod and carrying at least one fire-jet burner with a nozzle oriented under sharp angle to

the destructible surface, while the end of the body on the side of the destructible surface is made of a convex shape, passing into the cavity of the sludge outlet pipe 2.

The known device, by virtue of its design features, is adapted for the formation of rectangular-shaped wells and cannot be used for punching slots.

The purpose of the invention is to provide the possibility of using the device for the formation of large gaps.

15

The goal is achieved by the fact that in a device for thermomechanical destruction of rocks containing a housing connected to a drill rod

20 with a rod sludge pipe and carrying at least one firing jet with a nozzle, oriented at an acute angle to the surface being destroyed, the end of the body

25 on the side of the destroyed surface is made convex, passing through the sludge pipe to the cavity, the sludge pipe is located on the opposite side of the fire-fighting pipe.

30 burner side of the hull which

has on each side thrust and docking outer lugs for sequential and stepwise connection of several devices to each other.

FIG. 1 shows a device for the thermomechanical destruction of rocks; FIG. 2 - several such devices interconnected in the process of slit formation.

The device for the thermomechanical destruction of rocks has a body 2 attached to the rod 1 (FIG. 1), carrying on one side a fire-jet torch 3 / oriented by its nozzle at an acute angle to the surface to be destroyed. On the opposite side of the body 2, relative to the burner 3, there is a slurry pipe 4, which communicates with the space of the rod 1.

The end face 5 of the housing 2 on the side of the destructible surface has a convex shape, reinforced by projections b of hard alloy, between which cavities 7 are formed.

On the one side of the housing 2, there are stubborn 8 and docking 9 lugs, and on the other side, thrust 10 and docking 11 lugs, which are designed to sequentially and stepwise connect several devices during the slot formation process (Fig. 2).

On the sides of the housing 2 are installed elastic seals 12 in the form of half-rings. In the upper part, they are protected from hot gas by cooled metal brushes 13, and the inner side is bathed with compressed air fed through slits 14.

The formation of a large gap is carried out from several devices as follows.

. Before starting the operation of devices in the rock in any way, a slit 15 is cut through the width of the ledge 16 or the stoppers 17 of FIG. 2. The fire-burners of the 3 devices are started and brought to the operating mode, which are articulated with the help of stop 8 and 10 and connecting 9 and 11 protrusions and are lowered into the slot 15.

Flowing supersonic incandescent gas jets wash the surfaces of the end walls 18, repelling the rock particles in the form of pellets and enrich them with a solid abrasive phase. Further, the two-phase flow, which surrounds the convex end of body 5 of the body, is pressed against the face 19 of the ledge 16 of the slot 15, under the action of mass forces, causing its intense destruction.

The protrusions 6 on the end face 5 and the cavity 7 between the projections 6. Make the two-phase flow to pulsate, which activates their impact on the face 19. Exhaust gas and products

Destruction is thrown into the sludge disposal pipe 4 and then it enters the cavity of the rod 1 into the dust collector (not shown).

To increase the efficiency of destruction, vibrations can be communicated to devices using vibrators (not shown) connected to the rods 1.

Using the proposed device, the efficiency of cutting cracks can be significantly increased due to the combined effect of hot gases and abrasive on the rock, regardless of their

fortress, composition and condition yi.

Claims (2)

1. Author's certificate of the USSR 298748, cl. E 21 C 47/10, 1971. 2.The USSR USSR Certificate of Application No. 3254318 / 22-03, cl. Е 21 В 7/14, 04.03.81 (prototype).