基于钻探-物探数据融合的矿井涌水量预测及效果评估
Mine water inflow prediction and effect evaluation based on fused drilling-geophysical data
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摘要: 以大海则煤矿作为典型研究对象，基于238个地质及水文地质钻孔和50个物探断面勘测等数据，分析影响矿井涌水量的主要因素，认识确定开采地层的充水因素，构建矿区井田三维地质实体模型；采用数值模拟法、大井法和集水廊道法预测计算矿井涌水量，并综合对比多种方法和成果。结果表明：物探数据可以弥补地质钻孔对于区域控制的不足，融合利用钻探-物探数据精细刻画矿区地质地层结构，可以构建包含第四系含水层、第四系-白垩系隔水层、白垩系含水层、白垩系-安定组隔水层、安定组含水层、安定组-直罗组隔水层、直罗组含水层、2煤层隔水层和2-3煤含水层的矿区井田三维地质实体模型；通过矿区地下水数值模拟、大井法和集水廊道法预测涌水量的结果对比，实现了不同方法计算涌水量的相互验证；大井法和集水廊道法对涌水量只能做出静态预测，而数值模拟法可以基于钻探和物探数据对含水层系统结构进行精细剖分，准确描述开采过程中矿区地下水的运动规律，并考虑煤矿开采的工作进度，实现涌水量的动态预测，提高煤矿矿井涌水量的计算精度。Abstract: This paper takes Dahaize Coal Mine as the typical research object, based on data from 238 geological and hydrogeological boreholes and 50 geophysical cross sections, we analyzed the main factors affecting mine water inflow, recognized and determined the factors of water filling in the mining strata, constructed a three-dimensional geological entity model of mine field, used numerical simulation method, large well method and water collecting corridor method to predict and calculate mine water inflow, and comprehensively compared a variety of methods and results.The results show that the geophysical prospecting data can make up for the inadequacy of geological drilling for regional control, use the drilling, geophysical prospecting data to describe the mining geological stratum structure, construct 3D geological solid model of mine field, which includes Quaternary aquifer, Quaternary- Cretaceous aquifer, Cretaceous aquifer, Cretaceous-Anding formation aquifer, Anding formation-Zhiluo formation aquifer, Zhiluo formation aquifer, No.2 coal seam aquifer and 2-3 coal aquifer; through the comparison of the results of groundwater numericalsimulation, large well method and catchment corridor method, the mutual verification of different calculation methods is realized; big well method and the calculation method of water inflow can only make a static water prediction, the numerical simulation method can be used to subdivide the aquifer system structure based on drilling and geophysical data, accurately describe the motion law of the mining area of groundwater in the process of mining, and consider the work progress of coal mining, to implement the dynamic prediction of water inflow, improve the calculation precision of coal mine water inflow.
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Keywords:
- mine inflow /
- geophysical survey /
- data fusion /
- prediction /
- effect evaluation
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