龙泉井田4号煤层开采水文地质条件分析

摘要

龙泉井田主要含煤地层为石炭系太原组，4号煤层为首采煤层。通过分析，认为对4号煤层开采系统有充水影响的主要水源为二叠系下统山西组及下石盒子组含水层。在有断层、陷落柱等导通的情况下，太原组灰岩水及奥陶系灰岩水会对煤层产生间接充水。预测开采4号煤层时正常涌水量为13203m3/d，并提出了开采4号煤层的主要水害防治措施。%Themaincoal-bearingstrataoftheLongquanwellfieldbelongtotheTaiyuanformationofCarbonifer-oussystem.No.4coalseamisthefirstminingcoalseam.Throughtheanalysis,themainsourceofwaterthathasinflu-enceonthesystemofmininginNo.4coalseamislowerPermianShanxiformationandlowerShiheziformationaquifer. Whenthereisfaultandcollapsecolumn,TaiyuangrouplimestonewaterandOrdovicianlimestonewaterwillhavethe indirectwaterfillingonthecoalseam.ThepredictednormalwaterinflowofminingNo.4coalseamis13203m3/d, andputsforwardmajorwaterdamagepreventionandcontrolmeasuresforminingNo.4coalseam.