SU1613612A1 - Method of protecting mine workings against breakthrough of water from flooded tectonic distruptions - Google Patents

Abstract

The invention relates to the mining industry and makes it possible to increase the safety of mining operations. At the section of the reservoir (P), where the mining operations (GR) are carried out from the tectonic disturbance (TN) side, production is carried out 1. Of the production of 1 in the roof rock, a well is drilled over the cleaning space 2. The boundaries of the zone of cracks 4 and 5. According to the position of the boundaries determine the value of the safe depth of development and the angle between the plane II and the surface of the collapse of the roof rocks. Then, using these values determined width L of pillar barrier ratios L = N _t (CTGΩ + CTGδ _t), where N _t - safe depth development when administered GH near burst TN, m

ω - the angle between the plane P and the surface of the displacer, hail

δ _t is the angle between the plane P and the surface of the collapse of rocks, ensuring the safe management of GRs near TN, degrees. 1 il.

Description

(54) METHOD FOR PROTECTING MINING PRODUCTS AGAINST WATER BREAKTHROUGH FROM WATERFRONTED DISCONNECTING TECTONIC DISTURBANCES (57) The invention relates to the mining industry and improves the safety of mining operations. In the reservoir section (P), where gortectoni2 of mild disturbance (TH) is conducted from the side, production is carried out 1. Wells 2 are drilled from production 1 into the roof rocks above the treatment area 2. As GR is conducted near TH along the well define the boundaries of the zone of cracks 4 and 5. Using the position of the boundaries, determine the value of the safe depth of development and the angle between the plane P and the surface of the collapse of the rocks. Then, using the indicated values, the width 1 of the barrier pillar is determined from the relation 1 = = N _T (ctgtO + ctgip, where N _r is the safe development depth when maintaining the GR near the discontinuous TH, m; O is the angle between the plane P and the surface of the mixer, deg; - the angle between the plane P and the surface of the caving, ensuring the safe conduct of GR near TH, city 1 ill.

1613612 A1

I

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The invention relates to the mining industry and can be used to protect mine workings from water breakthroughs when developing coal seams near flooded discontinuous tectonic faults.

The purpose of the invention is to increase the safety of mining operations.

The drawing shows a diagram for implementing the proposed method.

The method is as follows.

At the mining site, where the violation is not flooded or poorly flooded, a special hole 1 is drilled near it, a well 2 is drilled into the roof rocks above the treatment space 3. - As the mining operations are conducted near the violation and its effect is detected, the boundaries are determined from the well zones of cracks 4 and 5, by the position of which values получают _γ and 8 _T are obtained and used to determine the width of the barrier pillar 6, which is left near the flooded discontinuous tectonic disturbance 7.

In case there are no irrigated areas on the mine field, when coal is mined near the irrigated tectonic disturbance by the treatment mine, the whole coal is left at the site at a distance from the line of intersection of the formation with the surface, displacement 8 no less than where N _ft <= Ng-ctgW, safe development depth under water bodies, m; the angle between the plane of the reservoir and the surface of the displacement mixer, deg.

1, hole without 10 h ctgk \

From the special working out from the violation side, the passing distance (not less than where h is the working height of the draft, m) is drilled well 2 into the rocks above the treatment space 3 so that it crosses the boundaries 4 and 5 of the zone of water-supply cracks. Mining operations near a waterlogged disturbance are carried out until the influence of the disturbance on the position of boundaries 4 and 5 is detected. As the disturbance manifests itself and the size of the zone of water-conducting cracks increases, Ν _τ and Ν _t are determined and used to determine the barrier width. pillar 6..

The width 1 of the barrier pillar deviated from point 8 of the intersection of the plate with the surface of the disturbance shifter is determined from the relation

=. N _T (ctgU + ctg (? _Τ ), where N is the safe development depth during mining operations near a discontinuous tectonic disturbance, m;

(ΰ - angle between the plane of the reservoir and the surface of the displacer, deg;

Of- angle between the plane of the reservoir and the surface of the caving, ensuring the safe conduct of mining operations near the tectonic disturbance, deg.

From the ratio it follows that the width of the barrier pillar left during the treatment process provides a decrease in the influence of the violation on the processes of crack formation, increases the stability of the rocks from the side of the violation against their destruction, and contributes to an increase in the size of the zone of water-conducting cracks.

The proposed method allows to increase the safety of coal mining during the development of coal seams near flooded discontinuous tectonic faults.

Claims (1)

The formula and goiter for resolving mine workings from flooded rupture, including the definition of a Method of protecting water breakthroughs from tectonic disturbances, including conducting treatment work, the formation of a zone of influence of tectonic disturbance on the clearing space in the roof rocks and the formation of a barrier pillar at the tectonic disturbance substratum, which differs by that, in order to increase the safety of mining operations, development is being carried out along the developed formation from the side of tectonic disturbance and wells are drilled from it into the rocks the roof over the treatment space, then, as the formation is being worked out, the boundaries of the crack zone and the safe development depth are determined from the indicated wells, while the width 1 of the formed barrier pillar is determined from the expression 16136T2 1 = N _T (ctgU + ctg £ _T ), where N _y is the safe development depth during mining operations near a discontinuous tectonic disturbance, m; (l) - the angle between the plane of the reservoir and the surface of the displacer, deg .; 0 _t - the angle between the plane of the reservoir and the surface of the collapse of the rocks, ensuring the safe conduct of mining operations near the tectonic disturbance, deg.