RU1770571C - Method for making raise mine working - Google Patents

Abstract

Appointment: construction of workings using explosives. In the design contour, contouring and subterranean wells are drilled, and between them, compensation cavities with displacement in the direction of the subterranean wells. Initially, the charges of the subterranean wells are blown, and then the contouring wells. Sequential breaking of the rock into compensation cavities with intensive crack formation occurs, ending with the collapse of the rock along the design contour into the underlying mining 2 sludge.

Description

The invention relates to mining, in particular, to methods for conducting uprising mine workings with end-to-end rock destruction at one time of blasting borehole charges of explosive (B B), and can be used by mining enterprises in underground mining of rock mineral deposits.

A known method of conducting uprising mining, including drilling the entire height of contouring, plunge and compensation wells, loading the cut and contouring wells with explosives to their entire length and sequentially, with intervals of deceleration, blasting the borehole charges in one go on compensation cavities - see, for example, ed. testimonial. No. 822602.

The disadvantage of this method is that it is possible that it is possible to press in the broken rock due to the small volume of the compensation wells and the unreliability of their expansion by the explosion during the destruction of the bore holes in one common blasting method, borehole

charges, which leads to a decrease in the efficiency of uprising mining.

There is also a known method of conducting uprising mining, including drilling of compensation cavities, cut and contouring wells, filling contouring and cutting wells with explosives and sequentially, with intervals of deceleration, blasting the borehole charges over their entire length in one go - cm ., for example, auth. testimonial. No. 1004643.

The disadvantage of this method is the complexity and unreliability of setting the explosive charge in the compensation cavity and the lack of good conditions for breaking rocks into the cut hole by the contours of the contouring wells, which leads to an increase in labor input and a decrease in the efficiency of production.

The aim of the invention is to increase the efficiency of the production by improving the conditions for the destruction of the deflected rocks.

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This goal is achieved by the fact that in the known method of conducting uprising mining, including drilling the entire height of the compensation cavities, cut and contouring wells, loading contouring and cutting wells with explosive and sequentially, at intervals of deceleration, blasting the bore holes into their entire length in one go, the cut wells and compensation cavities are drilled along the design development circuit, each cut well is located between adjacent compensation cavities on one the distance from them, and each compensation cavity is located between adjacent contouring and hole-hole wells with a displacement in the direction of the hole-hole, while all the charges of the hole-hole are initially blown up.

In this method of uprising mining, thanks to the placement of the cut holes and compensation cavities on the design circuit of the production, the exact contouring of the production is achieved, and due to the location of the compensation cavities between the contouring and cutting wells and their displacement towards the hole wells, the conditions for the cuts from the pillar of the beaten mountain are improved rocks and the formation of intense fracturing in it, increasing the efficiency of its breaking and collapse into the underlying mining weave.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically shows the location of the compensation cavities and wells for a reduced cross section of the production, and FIG. 2 is the same, but for an increased cross section of the mine. The dashed lines are the zones of intense fracturing of the massif being formed, which are formed during the explosion of explosive charges in the boreholes.

In order to carry out rising mining in this way, it is necessary to have horizontal mining in the lower and upper horizons.

Conducting uprising mining is carried out as follows.

According to the marking, a drilling rig installed in the mine working circuit is drilled parallel to the cutting height 1, contouring 2 wells, as well as the initial wells, evenly distributed along the design circuit of the working to its full height

compensation cavities that are located between the cut 1 and contouring 2 wells. Using these wells as pilot ones with the same drilling machine, after equipping it with a device for drilling parallel-conjugate wells, made, for example, according to ed. The certificate, Mg 1463899, is supplemented with several associated wells, positioning them in the direction of the cut hole 1. As a result, the multi-well cavities A are displaced in the direction of the cut wells 1. In this case, the rock to be blasted along the contour of the working hole is partially cut off from the pillar with compensation cavities A, which are shields protecting the side walls of the mine from destruction by downhole explosive charges. The submarine 1 and contouring 2 wells are charged with explosive by known methods, an explosive network is mounted, and in one step, with a corresponding deceleration, all first charges of the subterranean wells 1 are simultaneously blown up simultaneously and in the second, all charges of the contouring wells 2 are simultaneously blown up.

During the explosion of the cut-in charges 1, rock breaking occurs between the cut-out wells 1 and the compensation cavities A without pressing the last broken rock, which is facilitated by the cross-hole combs, which prevent dense filling of the compensation cavities and spilling it into the underlying mining. In this case, the length of the segment from the pillar of the rock to be broken off increases, in which intense fracturing is formed, directed towards the opposite opposite compensation cavities A. Due to this, the conditions for further breaking of the rock located in the contour of the produced mine are improved. The explosion of the charges of the explosive wells 2 breaks off rock located between the contouring wells 2 and the compensation cavities A, elongated by the explosion of the explosive charges of the hole wells 1. In this case, the final segment from the pillar of the rock being cut, penetrated by intense fracturing and its collapse in a fragmented state into the underlying mining. This completes the process of conducting uprising mining of a projected cross-section to its entire height in one step of blasting a borehole explosive charge.

In comparison with the prototype published in the invention by ed. testimonial. No. 1004643, the above-described method of conducting uprising mining provides an increase in the efficiency of tunneling by improving the conditions for cutting from the pillar and crushing the rock to be beaten,

Claims (1)

SUMMARY OF THE INVENTION A method for conducting uprising mining, including drilling of compensation cavities, hole and contouring wells, loading of hole and contouring wells with explosive and sequential, from interval 0 5 by slowing down, blasting the borehole charges over their entire length in one step, characterized in that, in order to increase the efficiency of the production by improving the conditions for the destruction of the rock being cut, the cut holes and compensation cavities are drilled along the design working circuit, each cut hole located between adjacent contouring wells at the same distance from them, and each compensation cavity is located between adjacent contouring and cut wells with an offset in the direction hole wells, with all the charges of the hole wells initially being blown up. Fia. 4 Fia. 2.