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煤层开采深度的增加给矿井防治水工作带来了更大的挑战,快速定量化确定含水层富水性成为一个亟待解决的问题.本文在理论分析和数值模拟的基础上,将瞬变电磁法与抽水试验结合,利用多个钻孔抽水试验所得的煤层顶板单位涌水量值与其所对应钻孔附近瞬变电磁法测量所得的煤层顶板视电阻率值建立回归方程,通过回归方程与其余位置视电阻率值,定量估算出其他位置处的拟单位涌水量q,用q定量估计整个测区含水层富水性.研究结果表明:瞬变电磁响应能很好的反映含水低阻层性质的改变.对于复杂含水区域,拟单位涌水量q能够提供更为精细的含水层富水性定量信息.该方法在内蒙古某煤矿进行了探索性试验,实现了对煤层顶板富水性的快速定量评估.
Increasing the depth of coal seam mining poses a greater challenge to the prevention and control of water in the mine and it is an urgent problem to be solved quickly and quantitatively to determine the water-bearing capacity of the aquifer.Based on the theoretical analysis and numerical simulation, Pumping test combined with the use of a number of drill holes obtained from the water level of roof coal seam unit water inflow value and its corresponding drilling near the transient electromagnetic method to measure the apparent top coal seam resistivity values established regression equation regression equations and the rest of the apparent resistance Rate, quantitatively estimate the inflow q of quasi-unit at other locations, and quantitatively estimate the water-bearing capacity of aquifers in the whole survey area by using q.The results show that the transient electromagnetic response can reflect the change of the properties of low-resistivity aquifer well In the complicated water-bearing area, the inflow q of quasi-unit can provide more detailed water-rich quantitative information of aquifer.This method has been exploratoryly tested in a coal mine in Inner Mongolia, and a fast and quantitative assessment of the water-bearing property of coal seam roof has been realized.