SU1458597A1 - Method of protecting parallel mine workings extending in one horizontal plane in outburst-hazardous rock at great depth - Google Patents

Abstract

The invention relates to the mining industry and allows to increase the safety of work and reduce the loss of mineral resources in the pillars between the workings (B). The zones of rock disintegration, which are formed as a result of conduction in the B massif, and the time of their formation, are determined around the leading B. The distance L between the leading and following axes of the axis is determined by the formula. I, g (Ln Uj; - 0.33) + g} G are the radii of the leading cross section and the subsequent B, respectively; the value of max, acting voltages in the array around B, MPa; K, is the strength of the rock mass, taking into account structural weaknesses, MPa. The distance to the axis of parallel B is determined and placed along the boundary of the undisturbed massif with the disintegration of the rocks formed around the initial B far zone. The distance 1 between the bores B is set by the formula 1 v-Г + 4d, where v is the speed of the subsequent B, m / day; - the duration of the formation of zones of rock disintegration around the advanced B, days; d is the diameter of the leading B. In this case, parallel B is located in the array unloaded from the stresses. 2il. 8. (L with 42 SP 00 SP with

Description

one

The invention relates to a mine, a production tank, and can be used to protect parallel workings carried out in a shock-hazardous rock mass at great depths. .

The purpose of the invention is to increase the safety of work and reduce the loss of mineral in pillars between workings.

Figure 1 shows the parallel workings, the cross section; figure 2 - section aa in fig ..

Figures 1 and 2 denote: production 1 was initially carried out, rock disintegration zones 2 formed in an array around a mine, a parallel mine 3, located at the boundary of the undisturbed massif with a far zone of disintegration, the distance 4 between the axes of parallel mines spacing is 5 between the holes of the parallel workings.

The protection of parallel workings in a shock-hazardous massif at a great depth in accordance with the proposed method is carried out as follows.

The zone 2 of disintegration of the rocks, formed as a result of the mine workings, and the time of their formation, are then determined around the advanced development 1, and then according to the formula

Lg, (1p6 - In K - 0.35) + g, + rj,

where L is the distance between the axes of the workings;

and

ff I c, respectively, the radii of the originally conducted and parallel development, m; maximum stresses in the array around the mine, Mia;

compressive strength of the array, MPa;

The distance A to the axis from the parallel excavation 3 is determined and positioned so that it is conducted along the boundary of the undisturbed massif with the distant zone 2 disintegration of rocks formed around the initial development. In this case, the distance 5 between the holes of the workings is taken according to the formula

1 b

V.T

4d

where V is the speed of the second

production, m / d; . k is the time of formation of zones of the Integration of rocks around the advanced production, days; d is the diameter of the initially carried out (advanced) cathode, m.

This minimum distance is taken depending on the time of formation of rock disintegration zones, so that the parallel development is located in the massif unloaded from the voltages due to the formation of

zones of disintegration of rocks around the first generation.

Claims (1)

Invention Formula The method of protection of parallel mine workings, located in the same horizontal plane in a shock hazard rocks at great depths, including the determination of the distance between the workings and the interposition of the longitudinal axes of the workings and their faces, carrying out parallel to one of the leading and subsequent workings, characterized in around the advance development, the position of the rock disintegration zones and the formation of the Brem are determined, and the subsequent development is carried out on the border of the last disintegration zone, the distance between the leading and following axes is determined by the formula 0 five L g (In S - In. R - 0.35) + g, + g, where L is the distance between the axes of the workings; 6 - the value of the maximum effective stresses in the array. around production, MPa; K - strength of the rock mass with taking into account structural weaknesses, Mlla; . the radii of the cross section of advanced and subsequent workings, m, and the amount of advance ahead of the advance generation of the relative bottom of the subsequent generation is established by the formula 0 AND year one where v V i 4ds 0 the rate of subsequent production, m / day; T - the formation of zones of rock disintegration around the advanced production, days, | d is the diameter of advanced production, J. .Z Editor M.Petrova Compiled by G. Vasyuchkova Tehred M. Khodanich Proofreader V. But ha Order 343/39 Circulation 410 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, st. Project, 4 Subscription