奥灰峰峰组顶部阻水特征及其水文地质意义  

Water blocking characteristics at the top of Ordovician Fengfeng formation and its hydrogeological significance

作　　者：张广宁 ZHANG Guangning(Zhaozhuang No.2 Coal Mine,Jincheng Coal Business Department,Jinneng Holding Coal Industry Group,Changzhi 046600,China)

机构地区：[1]晋能控股煤业集团赵庄二号井,山西长治046600

出　　处：《煤矿现代化》2022年第4期46-48,53,共4页Coal Mine Modernization

摘　　要：沁水盆地下组煤基底为奥陶系灰岩,研究其阻水性对下组煤带压开采水文地质条件具有重要意义。以赵庄二号井为工程背景,采用钻井液消耗量观测、抽(放)水试验、压水试验、声波测试等技术手段,证明了峰峰组顶部相对隔水层的存在,最后结合赵庄二号井下组煤底板奥灰水的带压情况,提出了下组煤开采的水害防治策略。The coal basement of the lower formation in Qinshui Basin is Ordovician limestone.The study of its water resistance is of great significance to the hydrogeological conditions of coal mining under pressure.Taking Zhaozhuang No.2 Coal Mine as the engineering background,the existence of relative water resisting layer at the top of Fengfeng formation is proved by using technical means such as drilling fluid consumption observation,water pumping(drainage)test,water pressure test and acoustic wave test.Finally,combined with the pressure of Ordovician limestone water under the coal floor of Zhaozhuang No.2 lower group,the water disaster prevention strategy of coal mining in the lower group is pointed out.

关 键 词：带压开采 峰峰组 相对隔水层 防治水策略 

分 类 号：TD741[矿业工程—矿井通风与安全]