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Grouting method of waterproof curtain of burnt rock covering on working surface to be mined of coal mine

A water-proof curtain and working face technology, which is applied in drainage, mining equipment, earthwork drilling and mining, etc., can solve the problems that the slurry is difficult to fully diffuse and overlap, the burnt rock grouting curtain has poor anti-seepage effect, and the water blocking rate is not high. , to achieve the effects of small leakage, improved water-proof performance, and good anti-seepage effect

Active Publication Date: 2018-11-20
SHENMU ZHANGJIAMAO COAL MINING CO LTD OF SHAANXI COAL & CHEM IND GRP +1
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Problems solved by technology

[0006] The invention provides a grouting method for covering the burnt rock water-proof curtain on the working face of the coal mine to solve the problem that the grout between the grouting holes in the prior art is difficult to fully diffuse and overlap, and the burnt rock grouting curtain prevents the grouting. Poor seepage effect, low water blocking rate, etc.

Method used

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  • Grouting method of waterproof curtain of burnt rock covering on working surface to be mined of coal mine
  • Grouting method of waterproof curtain of burnt rock covering on working surface to be mined of coal mine
  • Grouting method of waterproof curtain of burnt rock covering on working surface to be mined of coal mine

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Embodiment Construction

[0044] A mine in the northern Shaanxi mining area is a coal seam of the Jurassic Yan'an Formation. The coal seam structure is simple and the dip angle is small, which is a near-horizontal coal seam. Due to the development of surface gullies, the multi-layer coal in the minefield has burning phenomenon. Main mining seam 4 -2 The average coal thickness is about 3.63m, and the middle part of the minefield is 4 -2 Coal burnt rocks are in direct contact with reservoirs, 4 -2 coal below 5 -2 Coal is a complete coal seam that has not been burned. 4 -2 Coal-burned metamorphic rock is recharged by reservoir water and has strong water-rich properties, with a distance of 5 -2 Coal about 75m, 5 -2 Coal thickness is about 6m, 5 -2 After the coal face is mined, the water-conducting fracture zone will develop to 4 -2 coal burnt rock, 4 -2 Water in burnt rocks in the coal-fired area contributes to the lower part 5 -2 The threat to the safety of coal working face is great. for 5 -2 ...

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Abstract

The invention belongs to the technical field of water control of mine shafts, and particularly relates to a grouting method of a waterproof curtain of burnt rock covering on a working surface to be mined of a coal mine so as to solve the problems existing in the prior art that slurry between grouting holes is difficult to sufficiently diffuse and overlap, the leakproof effect of a grouting curtainof the burnt rock is poor, and the water shutoff rate is not high. The technical scheme adopted by the invention lies in that the grouting method comprises the steps of (1) performing hole drilling arrangement on the curtain; (2) grouting inner-row curtain holes; and (3) grouting outer-row curtain holes.

Description

technical field [0001] The invention belongs to the technical field of mine water prevention and control, and in particular relates to a grouting method for a water-proof curtain covered with burnt rock on a working face to be mined in a coal mine. Background technique [0002] Coal seam burnt rocks are relatively developed in Northwest my country. For example, in some mining areas in Xinjiang and northern Shaanxi, coal seam outcrops are shallow and there are many surface valleys, so coal seam spontaneous combustion has burnt rock phenomenon. After burning and collapse of burnt rock, internal fissures are very developed. When there are water bodies such as reservoirs, lakes, rivers or other aquifers around the burnt rock, the fissures of the burnt rock will be filled with water and become a strong aquifer. When the unburned complete coal seam under the burnt rock is excavated, if the water-conducting fissure zone of the lower coal working face communicates with the burnt roc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/38E21F16/00
CPCE21D11/105E21D11/38E21F16/00
Inventor 郭佐宁姬中奎张建安高小伟苗彦平江球王文涛罗安昆张池牛光亮
Owner SHENMU ZHANGJIAMAO COAL MINING CO LTD OF SHAANXI COAL & CHEM IND GRP
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