晋城矿区奥陶系灰岩水赋存特征及其对3号煤层承压开采的影响

摘要

华北众多矿区，奥陶系灰岩承压水是构成矿井安全生产的主要灾害之一，常因突水造成采面或采区，甚至矿井被淹。但由于地理、地质背景的差异影响，不同矿区奥陶系灰岩赋存特征、岩溶裂隙发育程度及导、富水性，存在显著的差异性，承压开采危险性及危害程度也不尽一致。针对晋城矿区3号煤层开采受煤层底板奥陶系灰岩承压水威胁的实际，在对奥陶系峰峰组与马家沟组灰岩含水层岩性、裂隙发育程度与富水性、地下水赋存特征等分析研究的基础上，采用定量与定性相结合的方法评价了矿区3号煤层承压开采可行性，为矿井安全生产及承压水的防治提供了科学依据。%Many mining area of north China,the Ordovician limestone confined water is one of the main disasters in coal mine safety pro-duction,often because of the water inrush caused coal face or mining area,even mine were flooded.But due to differences in geography, geologic background,there are significant differences about the Ordovician limestone′s occurrence characteristics,development degree of karst fissure,water conductivity and watery in different mining area.This article aimed at the Jincheng mining area which the main pro-duction Ⅲ coal seams that lies in exploitation of confined aquifer in mining,on the basic of analyzing aquifer lithology,fracture develop-ment degree and water content,occurrence characteristics of groundwater that for the Ordovician limestone of Fengfeng Formation and Majiagou Formation,adopting to the methods of quantitative and combined with qualitative,the feasibility for confined aquifer in mining was analyzed and evaluated,which can provide a scientific basis for the mine safety production and the prevention and control of con-fined water.