基于井下放水试验的矿井疏降量预测评价

井下放水试验作为特殊的水文地质试验,克服了地面抽水试验存在的不利条件,有着十分重要的实践和理论意义。为了探查双柳煤矿太原组灰岩含水层的水文地质条件,通过两次井下放水试验取得的相关水文地质参数,控制了太灰含水层的动态流场。基于井下放水试验取得的水文地质条件信息,利用Visual MODFLOW三维数值模拟软件,建立放水试验期间反映模拟区太灰地下水分布、储存及其时空变化规律的参数模型;根据拟定的预测方案,对太灰含水层的疏降涌水量进行预测。通过本次工作,对双柳井田下一阶段进行疏干降压,减少太灰含水层对上组煤（4#煤层）开采的威胁,同时为下组煤（8＋9#煤）开采提供疏降方式和水文地质依据。

Evaluation of Mine Shaft Water Discharge Prediction Based on Underground Dewatering Test

Abstract： As a special hydrogeological test, the underground dewatering test overcomes disadvantages exist in surface pumping test, thus have very important practical and theoretical significances. For the exploration of the Taiyuan Formation limestone aquifer hydrogeological conditions in the Shuangliu coalmine, the related hydrogeological parameters obtained from two underground dewatering tests have found out dynamic flow field of Taiyuan Formation limestone aquifer. Using the 3D Visual MODFLOW numerical simulation software on hydrogeological condition information based on underground dewatering test has established a parameter model can reflect simulated area Taiyuan Formation limestone groundwater distribution, reservation and temporal-spatial variation pattern during dewatering test. According to fitted prediction scheme predicted water discharge of Taiyuan Formation limestone aquifer. Through this study has provided dewatering mode and hydrogeological basis for next stage drainage in Shuangliu minefield to reduce limestone aquifer threat on the mining of upper coal group （No.4 coal seam） and lower coal group （Nos.8 and 9 coal seams）.