霍宝干河矿含隔水层特性及对下组煤开采的影响分析  

Characteristics of Aquifer and Water-Resisting Stratum and Its Influence on Lower Coal Seam Mining in Huobaoganhe Colliery

作　　者：李春意[1,2] 崔希民[1] 郎博[1] 王梦茹[1] 

机构地区：[1]中国矿业大学地球科学与测绘工程学院,北京100083 [2]河南理工大学测绘与国土信息工程学院,河南焦作454003

出　　处：《采矿与安全工程学报》2010年第3期438-442,共5页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2007CB209400);教育部新世纪优秀人才支持计划项目(NCET-07-0798)

摘　　要：为了研究霍宝干河矿高承压含水层对煤层开采的影响,基于现场实测资料,确定了井田范围内的主要含隔水层特征及其空间分布关系,得出了底板承压含水层为中等富水含水层.针对高承压含水层对下组煤开采可能造成的底板突水,采用FLAC^(3D)数值模拟手段,得出了工作面开采宽度与煤层底板破坏深度的关系及渗流发育的规律.当工作面的开采宽度大于160 m时,煤层底板的破坏深度不再随开采宽度的变换而变化,而是稳定在25 m,加上阻水带厚度13 m,小于底板46 m的隔水层厚度;在应力一渗流耦合的过程中,开切眼处单元孔隙水压力最高上升到2.4 MPa,且变化过程中孔隙水压力始终小于承压含水层的水压,不会发生煤层底板突水事故.For researching the effect of highly confined water-bearing aquifer on coal mining in Huobaoganhe mine, we ascertained the main aquifer and water-resisting stratum characters and space distribution relations of the coal mine based on field investigated data. The result shows that the confined aquifer of coal floor is a middle water-rich artesian aquifer. In accordance with water inrush possibility of highly confined aquifer effect on lower-group coal seam, numerical calculation software of FLAC^3D was used to simulate the process. The relation between mining- face width and damaged coal floor depth are obtained together with seepage regulation. When mining-face width exceeds 160 m, seam floor damage depth doesn＇t change with the mining- face width but keeps a constant of value of 25 m. Seam floor damage depth added water-stopping zone is lower than water-resisting stratum thickness. In the process of fluid-mechanical interaction zone, pore pressure at the position of open-off cut rises to the maximum of 2.4 MPa. During the process, pore pressure is always lower than that of confined aquifer from beginning to the end. So it is impossible to induce water inrush from the floor.

关 键 词：隔水关键层 承压水 底板突水 渗流 

分 类 号：TD325[矿业工程—矿井建设]