一种煤层顶板富水性快速评价方法

发布时间：2018-03-13 23:05

本文选题：瞬变电磁法　切入点：抽水试验　出处：《地球物理学进展》2017年04期 　论文类型：期刊论文

【摘要】：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.
[Abstract]:The increase of coal seam mining depth brings a greater challenge to the prevention and control of mine water, and the rapid quantitative determination of aquifer water enrichment becomes an urgent problem to be solved. This paper is based on theoretical analysis and numerical simulation. By combining transient electromagnetic method with pumping test, the regression equation is established by using the unit water inflow value of coal seam roof and the apparent resistivity value of coal seam roof measured by transient electromagnetic method near its corresponding borehole. By regression equation and other position apparent resistivity value, The quasi unit water inflow at other locations is estimated quantitatively, and the water-rich aquifer in the whole measured area is quantitatively estimated by Q. The results show that the transient electromagnetic response can well reflect the change of the property of the water-bearing low resistivity layer, and for the complex water-cut region, the transient electromagnetic response can well reflect the change of the property of the water-bearing low-resistivity layer. Quasi unit water inflow Q can provide more precise quantitative information of aquifer water enrichment. This method has carried out exploratory tests in a coal mine in Inner Mongolia and realized rapid quantitative evaluation of water enrichment in coal seam roof.
【作者单位】：中国科学院地质与地球物理研究所;中国科学院大学;
【基金】：国家重大科研装备研制项目(ZDYZ2012-1-05) 国家自然科学基金项目(41174090,41474095)联合资助
【分类号】：TD745.2

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