开平煤田东部地区奥陶系灰岩地质及水文地质特征  

Geological and Hydrogeological Features of Ordovician Limestone in East Area of Kaiping Coalfield

作　　者：张立宇 ZHANG Liyu(Tangshan Kailuan Construction Group Company Limited,Tangshan 063000,China)

机构地区：[1]唐山开滦建设(集团)有限公司,河北唐山063000

出　　处：《建井技术》2021年第5期20-23,共4页Mine Construction Technology

摘　　要：奥陶系灰岩岩溶含水层一直是威胁开平煤田安全开采的承压含水层。通过近年来矿区施工的地面钻孔资料,结合矿井井下实际情况,经过总结分析,认为上覆地层G层分布及古风化壳发育并不稳定,部分有缺失现象;奥陶系灰岩中含泥岩、粉砂岩及铝质成分掺杂,顶部灰岩白云质化普遍存在;奥灰含水层富水性变化大,且与进入奥灰深度成正比;奥灰水中离子成分各矿区整体统一,但有一定的个性差异。A Karst aquifer in the Ordovician limestone always would be a pressurized aquifer to have a threat to the safety mining in Kaiping Coalfield.With the information of the surface ground drilling constructed in the recent year mining area and in combination with the real conditions in the underground mine,the summary analysis showed that the G layer distribution in the overlaying stratum and the paleo-weathering crust development were not stable and some of them would have the missing phenomena.There were mud stone,siltstone and aluminum components mixed in the Ordovician limestone and on the top of the limestone,the dolomitization was generally existed.The watery of the Ordovician limestone aquifer could be highly varied and would be in proportion to the depth of the Ordovician limestone.The ion components in the Ordovician limestone water were overall unity in each mining area,but there was some difference certainly.

关 键 词：奥灰水 奥灰地层 水文地质 

分 类 号：TD163[矿业工程—矿山地质测量]