综采工作面顶板次生离层水害形成机理分析

发布时间：2018-06-16 08:36

本文选题：顶板离层水 + 次生灾害　；参考：《采矿与安全工程学报》2017年04期

【摘要】：为了提高顶板离层水害防治效果,分析了离层水害形成的必要条件。采用力学分析的方法,结合关键层理论,推导出主采煤层覆岩中产生离层的判别式。研究表明:离层水害的形成取决于离层的形成、离层发育位置、离层补给水源和可积水离层空间持续时间。离层沿工作面推进方向的长度、离层发育高度、离层与煤层垂向距离、离层中心距工作面开切眼距离及工作面推进距离等5个参数确定了离层空间尺寸,该尺寸的大小控制了离层水的水量。以宁夏某煤矿综采工作面为例,分析了该矿顶板次生离层水形成的层位、储水空间大小。
[Abstract]:In order to improve the prevention and control effect of water hazard in roof, the necessary conditions for formation of water hazard in separated layer were analyzed. Using the method of mechanical analysis and combining with the theory of key layer, the discriminant of separated strata in overburden rock of main mining seam is deduced. The results show that the formation of water hazard depends on the formation of the separated layer, the location of the separation layer, the recharge water source and the spatial duration of the hydrological layer. The length of the separation layer along the direction of the working face, the height of the development of the separation layer, the vertical distance between the separation layer and the coal seam, the distance between the opening and cutting hole of the separation layer and the distance between the coal face and the coal face, and the distance between the seam and the coal face are determined. The size of this size controls the amount of water in the separated layer. Taking a fully mechanized mining face in a coal mine in Ningxia as an example, the formation of water in the secondary separated strata of the roof of the coal mine and the size of the water storage space are analyzed.
【作者单位】：西安科技大学地质与环境学院;国土资源部煤炭资源勘查与综合利用重点实验室;
【基金】：国家自然科学基金项目(41272388) 高等学校博士学科点专项科研基金新教师类基金项目(20116121120005) 科技部第六批中国-南非联合研究项目(2012DFG71060)
【分类号】：TD745

【参考文献】