基于“两带”探查技术的顶板水害危险性分析——以伯方煤矿为例  

Preliminary analysis of roof water hazard risk based on"two-zones"exploration technology:An example of Bofang coal mine

作　　者：刘随方 郑斌[1] 牛俊伟[1] 常丰国 王鹏[1] 段江飞 赵子超 LIU Suifang;ZHENG Bin;NIU Junwei;CHANG Fengguo;WANG Peng;DUAN Jiangfei;ZHAO Zichao(Bofang Coal Mine Branch of Shanxi Lanhua Technology Venture Co.,Ltd.,Gaoping 048400,Shanxi,China;Tianjin Branch of Huasheng Hydrogeological Survey Co.,Ltd.,CNACG,Tianjin 300000,China)

机构地区：[1]山西兰花科技创业股份有限公司伯方煤矿分公司,山西高平048400 [2]中煤地华盛水文地质勘察有限公司天津分公司,天津300000

出　　处：《矿产与地质》2024年第4期785-792,共8页Mineral Resources and Geology

基　　金：山西兰花科技创业股份有限公司科技开发项目(编号:LHBF-2022-177)资助。

摘　　要：应用钻液漏失量观测、岩芯采取统计、钻孔电视观测和钻孔电阻率动态监测等多种“两带”探查技术方法,对伯方煤矿3煤开采的覆岩导水裂隙带发育特征进行研究,分析3煤采动影响下的顶板水害危险性。研究结果表明:3213工作面导水裂隙带发育高度为87.66 m,发育至K9砂岩含水层;垮落带发育高度为22.61 m,发育至2煤下部K8砂岩含水层。3313工作面垮落带最大高度为煤层顶板20~21 m,至2煤顶板砂岩含水层;导水裂隙带最大高度为煤层顶板83~87 m,至K9砂岩含水层。由此计算得出的垮落/采厚比为3.58~3.76,裂缝/采厚比为14.85~15.56。3煤回采产生的导水裂隙可造成二叠系下石盒子组和山西组砂岩含水层与3煤采空区的连通,含水层地下水岩导水裂隙向下渗流,增加了顶板水害的风险。建议矿井严格落实顶板水害防治的相关要求,降低采动裂隙对矿井正常生产的影响。In this paper,a variety of"two-zones"exploration techniques,such as drilling fluid leakage observation,core recovery rate statistics,drilling hole television observation and drilling hole resistivity dynamic monitoring,are used to study the development characteristics of water conducting fracture zone in the overlying rock of No.3 coal seam in Bofang coal mine,and the risk of roof water disaster under the influence of No.3 coal seam is analyzed.The research result shows that the development height of water conducting fracture zone in 3213 working face is 87.66m,and it develops to K9 sandstone aquifer.The development height of the caving zone is 22.61m,which develops to K8 sandstone aquifer at the lower part of No.2coal seam.The maximum height of the caving zone in 3313 working face is 20-21m from the roof of coal seam to the sandstone aquifer in the roof of No.2 coal seam.The maximum height of the water conducting fracture zone is 83-87m from the coal seam roof to K9 sandstone aquifer.The calculated caving/mining thickness ratio is 3.58-3.76,and the fracture/mining thickness ratio is 14.85-15.56.The water conducting fissures produced by the mining of No.3 coal seam can cause the connection between the sandstone aquifers of the Lower Shihezi Formation and Shanxi Formation of Permian system and the goaf of No.3 coal seam,and the groundwater in the aquifers percolates downward through the water conducting fissures,increasing the risk of roof water damage.It is suggested that the mine strictly implements the relevant requirements of roof water disaster prevention and controlling treatment,and reduces the impact of mining fissures on the normal production of the mine.

关 键 词：导水裂隙带 钻孔电阻率动态监测 覆岩破坏 顶板水害 伯方煤矿 

分 类 号：P618.11[天文地球—矿床学] P694[天文地球—地质学]