淮南张集煤矿灰岩含水层数值模拟及涌水量预测

Numerical Simulation of Limestone Aquifers and Discharge Prediction in the Zhangji Coal Mine of Huainan

为了正确评价淮南煤矿张集煤矿灰岩含水层对煤层开采的影响,探明详细的水文地质条件,本文利用-536 m水平放水成果资料,利用GMS建立了张集煤矿C 3Ⅰ组灰岩含水层水文地质模型及其数值模型,经识别和验证后,获得了灰岩含水层水文地质参数,并结合“突水系数”,进行数值模拟分析,计算水文地质参数,预计灰岩疏水量,并利用数值模拟参数分别模拟计算了-536 m、-565 m水平、-566 m水平的安全开采下的疏放量。此次计算结果为张集煤矿采煤过程中灰岩水的防治提供了一定借鉴。

The purpose of this work is to correctly evaluate the influence of limestone aquifers on coal-seam mining in the Zhangji coal mine of Huainan coal mine and clarify detailed hydrogeological conditions.Based on data of-536 m horizontal discharge,GMS is used to establish hydrogeologic and numerical models for limestone aquifers in the C 3ⅠFormation of the mine.Identification and verification to these models allow us to obtain hydrogeological parameters of the aquifers.Combining with the“water inrush coefficient”,numerical simulation is carried out,hydrogeological parameters are calculated,and the amount of limestone is predicted.Then the numerical simulation parameters are used to calculate the amount of drainage under safe mining at levels-536 m,-565 m and-566 m,respectively.These calculation results would help implement prevention and control of limestone water during the coal mining process in the Zhangji coal mine.