Stope face roof water pre-drainage construction method
A technology for mining working face and construction method, which is applied in the directions of drainage, mining equipment, earthwork drilling, etc., to achieve the effect of reducing water inflow, saving engineering investment, and eliminating impact.
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[0011] According to the comprehensive analysis of the hydrogeological conditions of the Changping Mine of our group company, the No. 3 coal seam to be exploited has a relatively high water content in the sandstone aquifers numbered K8 and K10. When the old top of the working face collapses after initial mining, the water output is large and sudden, which easily poses a serious threat to the normal production of the working face and at the same time creates a big impact on the drainage system of the working face.
[0012] However, the water-rich anomalous areas delineated in the ground electrical exploration data are relatively rich in water. If they are not released in advance, the water inflow in some areas may suddenly increase during mining, especially when mining from downhill to uphill terrain, the harm is even greater.
[0013] The No. 3 coal recovery working face was initially mined and the old top span was behind, and the outflow water was off-white. After analysis, th...
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