A method for prevention and control of old empty water under the condition of repeated mining under the condition of layering on thick coal seam damaged by small kiln
A technology of old empty water and thick coal seam, which is applied in the field of old empty water prevention and control under the condition that layers of thick coal seams are damaged by small kilns. Empty water drainage is clean and thorough, and drilling exploration distance is short, so as to shorten the drainage time, eliminate old empty water problems, and improve the hole formation rate of drilling holes.
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[0033] The content of the present invention will be further described below in conjunction with China Coal Huajin Group Hanzui Coal Industry Co., Ltd. as an example.
[0034] China Coal Huajin Group Hanzui Coal Industry Co., Ltd. is formed by the integration of 4 small coal mines and surrounding resources that are not suitable for mining. The main mine is 2 # The strata on the coal seam were damaged to varying degrees. Due to the non-standard mining methods and techniques in small coal mines, and the poor control of the excavation engineering position, the situation of water accumulation was complicated, and the mine mining was deeply affected by the old empty flood. Among them, the delamination damage on the 32101 working face is serious, and the mining of the working face is deeply restricted by the old empty water damage. 440m, took a total of 1.5 years, which seriously restricted the safe and efficient production of the mine. In order to solve the problem that the old empt...
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