SU1490282A1 - Method of preventing floodings of undermined surfaces area with subsoil and surface water - Google Patents

Abstract

The invention relates to the mining industry. The aim of the invention is to reduce the cost of drainage work in the development of a suite of formations (P). A section of the earth's surface is worked up by a retinue P with the formation of a flat bottom of the displacement trough. Initially, the first P. is removed from the earth's surface. Its drop-through testing is carried out until the lower boundary (NG) of the cleaning works reaches a depth not less than the height of the zone of water-conducting cracks, and then proceed to the development of the underlying P. At the same time, the excavation of each underlying P. NG of cleaning works on the first P, determined depending on the depth of the indicated NG, maximum curvature on the surface, thickness P and the nature of rock displacement. With an increase in the NG depth, the distance is shortened to the full coincidence of the NG in the neighboring P. After that, the next lowermost P. 1 sludge is removed in the same way.

Description

The invention relates to the mining industry and is intended to prevent flooding of the developed strata layers of the earth's surface.

The purpose of the invention is to reduce the cost of drainage work in the development of a suite of layers.

The drawing shows the scheme of the method implementation in a section across the strike of the formations.

The method is carried out as follows.

Plots of the earth's surface are worked up by a retinue of coal seams, as a result of which it is possible to block it with soil and surface. To prevent flooding, the first, uppermost layer 1 of the suite is otpravatsya first, carried out a full-time job with the formation of a flat bottom displaced trough above the developed space. The first reservoir is tested by dropping until the lower boundary of the cleaning operation reaches a depth not less than the height of the zone of water conducting cracks H formed above the treated reservoir 1.

Then proceed to the development of the second layer of the suite. When the lower boundary of the purification works in the process of mining reservoir 2 is located at a distance S from the lower boundary of the clearing of works on reservoir 1, it is an additive to max.

The maximum permissive curvature of reservoir 1 is zero, and the viewport of the water conducting cracks zone does not increase. When the lower boundary of the clearing works for reservoir 2 is moved to the point where the boundaries of clearing works for reservoirs 1 and 2 occur, consequently, the height of the HAZ will increase to the maximum under these conditions. Between these two extreme positions of the boundaries of the cleaning works (in section S), it is possible to control the increase in the height of the computer component by a given added curvature, which is proportional to the approach S.

Thus, the excavation of the lower reservoir 2 (as well as each subsequent one) is delayed from the lower boundary of the purification works in reservoir 1 (or rto the nearest one) by distance S, determined by the formula

S s

g HZ, K, - (4t, m |. gal

11 - ---; - I m,

J

at

S condition - o

between 2 and 3 layer, ..., between (p-1) and p layers; / Sp - boundary angle

displacements in the re-developed stratum, hail;

d - dip angle, deg.

The boundary curvature (K) for specific conditions is determined by the formula

15

, 8e 10-h

(3)

about 20

25

where A is the average thickness of argillite, aleurolite and shale in fractions from the bedrock thickness in the range from tO-multiple to 60-fold removable thickness of the developed seam from the roof of the latter;

e - the basis of natural logarithms.

where Nc is the depth of the lower boundary of the purification works on the first stratum at the time of the n-th stratum of the suite, m; K - maximum curvature on

the upper boundary of the zone of water-conducting cracks (boundary curvature), m;

41,102,

..., mj are the thickness of the formations of the suite; a | - coefficient taking into account

As the mining operations 30 deepen (in particular, the depth of the lower boundary of the refining works on the first formation of the suite at the time of the nth reservoir development) increases, the lower degrees of cleaning works on the 35 formations being developed (the S value decreases) until they completely coincide, after which the lower boundaries of the cleaning work are carried out simultaneously, the boundaries defined, defined by the formula (1).

having stepped up to the development of the next lower-activation of the displacement of rocks Q of the reservoir with the lag from the indication of the lower layers of the formation;

the same for a reservoir with the sequence number n;

-site between the lower boundaries of the cleaning works on the adjacent imposing and below. The optimal increase in the height of EWT 45 above the upper layer 1, due to the approach of the boundaries of the cleaning works when mining layer 2, 3, etc. within area S, it should be such that the upper boundary of the said CQ zone coincides with the surface, i.e. when the depth of the area S is determined by the processing of the underlying layers

lying layers, within which the addition of unambiguous deformations occurs, m

according to the formula

(N,.) С08, „

S - --n; iT:, - 5) - 2)

where N, N ,, .., N is the distance

verticals, respectively, between 1 and 2 layer.

Ng, And | - etc. must be equal to H. In this case, a through zone of water-conducting Tpenij iH is formed, which 55 penetrate the entire thickness of the suite of coal seams being worked out. These fissures drain the ground and surface waters into the mountain workings by filtration without breakthroughs.

As the mining operations deepen (in particular, the depth of the lower boundary of the purification works on the first formation of the suite at the time of the nth reservoir development) increases, the lower degrees of cleaning works on the developed formations (S value decreases) bring them closer to full coincidence, after which the lower boundaries cleansing works are carried out at the same time, boundaries defined by formula (1).

having set about working out the next lower stratum with a lag from the

Ng, And | - etc. must be equal to H. In this case, a through zone of water conducting Tpenij iH is formed, which penetrate the entire thickness of the suite of the coal seams being worked out. These fissures drain the ground and surface waters into the mountain workings by filtration without breakthroughs.

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V LMdshmp

Claims (1)

Claim A method of preventing flooding of a part of the earth’s surface being mined by ground and surface water, including excavation of the first layer from the earth’s surface with moving the lower boundary of the treatment works, determining the height of the zone of water-supply cracks and water drainage from the trough of displacement into the mine workings of the first layer by water-water cracks, characterized in that , in order to reduce the cost of drainage work during the development of the formation of formations, determine the maximum curvature at the upper boundary of the zone of water-supply cracks, at ohm, the excavation of the underlying layers of the formation begins after the lower boundary of the treatment works on the first layer reaches a depth of not less than the height of the zone of water-supply cracks, while the excavation of each underlying reservoir is lagged behind the lower boundary of the treatment works by the closest overlying formation, determined by the formula S ' } 0, the depth of the lower boundary of the och—, steel works on the first layer at the time of mining of the pth layer of the suite, m; maximum curvature at the upper boundary of the zone of water-supply cracks, m '; thickness of formations, m; coefficient taking into account the activation of rock displacement during the excavation of the underlying layers of the suite; the same for the reservoir with serial number n; the section between the lower boundaries of the treatment works with it came out to the hedge-laying bed, in which there are unambiguous deformations, along the soybeans, the following addition was made m