沁水盆地长平煤矿煤层底板岩溶裂隙形成条件及发育规律
Coal Geology of China(2016)
Abstract
沁水盆地长平矿位于沁水煤盆地东缘,主要开采山西组3煤及太原组8煤、15煤,矿井采掘生产中主要受到石炭系太原组、奥陶系峰峰组、马家沟组的岩溶承压水威胁。通过分析地质、物探资料,主要研究了各煤层底板岩溶裂隙形成条件及发育规律,岩溶承压水赋存特征及动态规律。结果表明:岩溶形态主要以小溶孔及溶蚀裂隙为主,且随着地层倾向(北西向)呈逐步减弱趋势;石炭系与奥陶系灰岩各含水层均表现为弱富水性,平面上以小型分散状静态水体为主,且随地层倾向逐渐减弱,垂向上各含水层间无水力联系。
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Key words
limestone confined water,mining under safe water pressure of aquifer,karst fissure,hosting features,water yield property,Changping coalmine
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