放水试验探查疑似陷落柱导水性的理论依据及实例分析

Theoretical Basis and Case Analysis of Investigating the Water Conductivity of Suspected Collapse Column by Dewatering Test

陷落柱导水性的探查是矿井防治水的重点和难点。任楼煤矿中六采区发现X1物性陷落柱,需要探明其导水性。文章从理论上分析了放水试验探查陷落柱导水的可行性,然后结合实际情况,在陷落柱区太原组上部灰岩含水层进行井下放水试验,分析太灰、奥灰含水层之间水位、水压以及水化学时空变化特征,从而确定X1物性陷落柱为导水陷落柱。结果表明:井下放水试验可以查明各个含水层的水力联系,确定陷落柱导水性,为矿井水害防治提供依据。

Investigation of the water conductivity of collapse columns is an important and difficult point in mine water control. X1 physical collapse column was found in Renlou Coal Mine middle sixth mining area, the water conductivity of which needed to be verified. Article analyzed the feasibility of exploring the water conductivity of collapse columns theoretically and performed an actual un-derground dewatering test in the limestone aquifer in the upper Taiyuan Formation in the collapse column area to analyze the temporal and spatial variation of water level, water pressure and water chemistry in the Taiyuan and Ordovician limestone aquifers, thus determining X1 physical collapse column as a water-conducting collapse column. According to the results, underground dewatering test can find out the hydraulic connections across aquifers, determine the water conductivity of collapse columns, and provide the basis for mine water hazard prevention and control.