黄玉川煤矿地层含水性及渗透性的抽采试验研究
Experimental Study on Drainage of Strata Water-Bearing and Permeability in Huangyuchuan Coal Mine
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摘要: 通过在黄玉川煤矿地面布置抽水孔进行抽水试验,测试不同孔位的涌水量、渗透系数及影响半径,掌握奥灰水地层的富水性及渗透性特征,避免井下采煤过程中的突水事故。结果表明:奥陶系灰岩地层发育导水断裂带及陷落柱等导水通道,含水层对 9 号煤层开采的影响比其他煤层严重;抽水结束后,含水层水流补给抽水钻孔, 24 h内液面恢复至抽水之前的水位深度;地面钻孔抽水试验测试的涌水量在 0.018~2.412 m3/h之间,平均单位涌水量为 0.036 L/(s·m),属于弱含水性的含水层;渗透系数在平均值为 0.002 4 m/d,属于弱透水性的含水层。Abstract: The pumping test was carried out by arranging pumping holes in the ground of Huangyuchuan Mine to test the water inflow, permeability coefficient and influence radius of different hole positions, and to master the characteristics of water and permeability in the formation to avoid water inrush in underground coal mining. The results show that: Ordovician limestone strata develops water-conducting channels such as water-conducting fracture zone, fracture zone and collapse column; the influence of aquifer on 9# coal seam mining is more serious than other coal seams; after the pumping is completed, the aquifer water is replenished to the pumping hole,and the liquid level is restored to the depth of the water before pumping within 24 hours; the amount of water inflow from the ground drilling pump test is between 0.018 m3/h and 2.412 m3/h, and the average unit water inflow is 0.036 L/s·m, which is a weak aquifer; the permeability coefficient is 0.002 4 m/d, which is a weakly water-permeable aquifer.
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Keywords:
- Huangyuchuan Coal Mine /
- water-bearing /
- water-permeable aquifer /
- water inflow /
- water inrush /
- weak aquifer
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