煤田奥灰岩溶水文地质勘探技术研究

该文主要探究某煤田奥灰岩溶水文地质勘察的具体方法和勘探成果。地面瞬变电磁勘探结果表明,测区内存在多个低阻异常区,其形成与断层及裂隙发育带含水有关,部分断层有沟通奥灰水的可能性;水文地质钻探成果表明,煤层底板至奥灰顶界面分布岩层以粉砂岩、砂质泥岩、中粒砂岩等为主,岩层强度较高,阻水压性能较好;水文地球化学测试结果表明该区域地下水Cl-、SO42-、Na+含量较高,呈弱碱性,属淡水-微咸水。该勘探结果将为下一步煤田的安全开采提供依据。

This paper mainly explores the specific methods and exploration results of hydrogeological exploration of Ordovician limestone karst in a coalfield.The results of surface transient electromagnetic exploration show that there are many low resistivity abnormal areas in the survey area,which are related to the water cut of faults and fracture development zones,and some faults have the possibility of communicating with Ordovician lime water.The interface between coal seam floor and Ordovician ash top is mainly composed of siltstone,sandy mudstone and medium-grained sandstone with high strength and good water pressure resistance.The results of hydrogeochemical tests show that the groundwater in this area has high contents of Cl-,SO42-and Na+,which is weakly alkaline and belongs to fresh water-brackish water.The exploration results will provide a basis for the next step of safe mining of coalfields.