SU1578336A1 - Method of regional control of rock pressure in mining series of strata - Google Patents

Abstract

The invention relates to the mining industry. The purpose of the invention is to reduce the cost of preventive measures and increase the safety of mining operations. To do this, after stopping the cleaning hole of the protective layer (GW), the width of the reference pressure zone (OD) and the distance from the bottom hole to the maximum OD are determined. After that, the edge part of the RFP is strengthened to a depth equal to the specified distance, for example, by injecting strengthening solutions. In this case, the cube strength of the coal before and after hardening is determined. Then, the width of the OD zone after hardening of the edge part of the RFP is determined by the formula given in the description of the invention, and the boundary of the zone of increased rock pressure from the edge part of the RFP is established on it. Then adjacent layers of the suite are developed within the specified zone with the use of preventive measures. 2 Il.

Description

The invention relates to the mining industry and is intended for the regional management of rock pressure in the development of formations containing shock and outburst-hazardous formations.

The aim of the invention is to reduce the costs of preventive measures and increase the safety of mining operations.

Fig, 1 shows a section along the strike of the layers; Fig. 2 is a diagram of the redistribution of rock pressure.

The method is carried out as follows.

After cleaning the bottom of the protective formation 1, the edge part 2 is strengthened by one of the known methods, for example, by injecting hardening solutions through the well. The edge part 2 is strengthened to a depth of L. equal to the distance to point 3

the maximum of the reference pressure, which, like the width of the reference pressure zone, is determined by one of the known methods. The cube strength of the coal before hardening and the cube and after the hardening of the edge part 2 is also determined by an effective method. After hardening of the edge part, the width I1 of the reference pressure zone 4 is determined from the expression

s

with

I

- I h u / Okub

where I is the width of zone 5 of the reference pressure before hardening, along which the boundaries 6 of the zone of elevated rock pressure from the koai part of the formation are established. Then, outburst-hazardous formations 7 are developed using preventive measures in the zone. In this case, the zone 8 of the reference pressure will have a smaller width than before the hardening of the edge part 2.

Claims (1)

The invention The method of regional control of mountain pressure in the development of a suite of layers, including stopping the cleaning face of the protective formation, determining the width of the reference pressure zone, establishing over it the boundaries of the increased mountain pressure from the edge of the protective formation and developing in the specified zone adjacent formations with preventive measures MI, characterized in that, in order to reduce the cost of their implementation and increase safety 0 five mining, after stopping the clearing hole, the distance from it to the maximum of the reference pressure is determined, and the boundaries of the zone of increased mining pressure are set after hardening the edge of the protective formation to a depth equal to the specified distance, while the width of the reference pressure zone after strengthening I1 is determined from the ratio 1 ccc / okub where I is the width of the reference pressure zone before hardening, m; Sgkub iskkub - cubic strength of coal, respectively, before and after strengthening, MPa. figure 1