SU976062A1 - Rock-breaking tool - Google Patents

Description

(54) BREAST DETERMINATION

one

The invention relates to the mining industry, in particular, to devices for the formation of explosive cavities in a rock massif, and can be used by mining enterprises in the open and underground mining of mineral deposits with the use of their blasting drilling and blasting operations.

Known rock-breaking projectile containing disk working tools installed in parallel bearing bars x are located between the hedging elements G1

The closest to the proposed design and the achieved effect is a rock-breaking projectile, including disk working tools located in parallel bearing bars, between which spacer elements 2 are associated with the power cylinder.

A disadvantage of the known device lies in the low efficiency of its operation due to insufficient pressure

tons of working tools for destructible rock due to the large losses of the friction forces developed by the cylinder in wedge sliding elements, reducing the efficiency of the projectile.

The aim of the invention is to increase the efficiency of the projectile.

This goal is achieved by the fact that; spacers are mounted in the form of hinges attached to the trunnion | bars and rod of the power cylinder of sever-directed rods.

With such a design of the projectile, due to the insignificant loss of friction in the hinged joints, its efficiency increases, the pressure transferred to the working tools is more fully used; created by the power cylinder.

FIG. Figure 1 shows the rock breaking projectile, general view, (located in the well); in fig. 2 - section A-A on Fig.1; FIG. 3 - the same cross section.

Claims (2)

The rock-breaking projectile contains a rigid 397 frame attached to the cylinder 1, consisting of side beams 2, top 3 and bottom 4 bases, into the grooves 5 of which support bars 6 are inserted with ends of axial disk working tools (cones) mounted on them 8. The lugs 10 are attached to the rod 9 of the power cylinder, by means of which support bars are attached to it by spacer rods 11 with the axles 12 6. I roam the destructive projectile as follows. For operation, the projectile is connected to a column of rods (not shown), inserted into the drilled well 13, and into the power cylinder 1 along the column of rods the working medium (liquid or gas) of the corresponding head is supplied (pressure). In this case, the piston 14 extends from the cylinder 1 by the piston 14, which extends the supporting rods 6 with the spacer rods 11. As a result, the disk working tools 8 are pressed against the borehole wall. Then the projectile movements (not shown) by means of rods communicate reciprocating movements. The pressed working tools 8 at the same time, rolling along the wall of the well, produce in it longitudinal grooves-concentrators of 15 voltages on the head equal to the feed rate. After cutting the slots 15 to the full depth, i.e. when the uneven bar 6 moves to the walls of the well, and the piston 14 rests against the cylinder cylinder - lower base 4 of the projectile frame, relieves the pressure of the working medium and moves the propeller mechanism to the new inlet, at which the working tools 8 compress the supporting bars 6 As a result, the rod 9 moves to the initial position and the working medium is squeezed out of the cylinder by the piston 14. After that, begin the next cycle of work. So for several cycles cut longitudinal grooves 15 for the entire depth of the well. 2 4 The advantage of this rock-breaking projectile is the higher efficiency of its mechanism — 75-85% instead of 40-50%. Therefore, the pressure of working tools on the rock being destroyed by them increases by a factor of 1.5-2. As a result, labor productivity by the formation of longitudinal grooves-concentrators of stresses in the walls of explosive wells increases by 30–40%, providing an increase in the distance of the energy of the explosion of a borehole charge of an explosive substance. Due to this, due to the expansion of the grid of explosive wells, the volumes of their drilling and charging are reduced, and the fragmentation of the striking array is improved. The latter leads to a decrease in the specific consumption of the explosive material for blasting the secondary crushing of the mineral, according to laboratory studies, by 30%. Claims of the invention Rock-cutting projectile including disk working tools located in parallel bars, between which spacer elements associated with the power cylinder are placed, characterized in that, in order to increase the efficiency of the projectile, the spacer elements are made in the form of balls attached to bearing bars and a rod of a power shaft of counter-directed rods, Sources of information taken into account during the examination 1. Author's certificate of the USSR in application No. 2482484, cl. E 21 C 37 / OO, 1977. 2. Authors certificate of the USSR on the application M 2856443, cl. E 21C 37 / OO, 1979 (prototype).