采场上覆坚硬岩层破断的数值模拟研究  

Numerical simulation of overlying hard strata rupture in a coal face

作　　者：曹胜根[1] 姜海军[1] 王福海[1] 程正刚[1] 武忠进[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,矿业工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2013年第2期205-210,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50774078);江苏省“青蓝工程”项目;江苏高校优势学科建设工程项目;煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM12X06)

摘　　要：坚硬顶板在煤层开采后形成大面积悬顶,通常会给采场乃至矿井造成严重的破坏。运用理论计算,数值模拟方法分析研究不同坚硬岩层距煤层距条件及不同支架阻力作用下,采场上覆岩层的运动规律。结果表明,当煤层上覆直接为坚硬岩层时(坚硬岩层距煤层0 m),支承压力集中系数及系统释放的能量最大,坚硬岩层的破断会对工作面的安全生产构成很大威胁,易造成压架事故或冲击矿压等。采用强制放顶处理此类顶板在现场取得了较好的应用效果。Large area hanging arch formed by strong roof seam mining can usually cause serious damage to stope even the whole mine.Movement law of overlying strata under different conditions of support resistance and distance between hard rock bed and coal seam has been analysed by theoretical calculation and numerical simulation.The results show that when the overlying strata of coal seam directly is hard rock bed（distance between hard rock bed and coal seam is 0 m）,the concentrated parameter of abutment pressure and the released energy from this system reaches the maximum,the rapture of hard rock bed easy to cause fully mechanized supports crushing accidents or impulsion pressure which constituted a great threat to safety production.Good effect has been gotten in the field application by using forced roof caving technology to process this roof type.

关 键 词：坚硬岩层 强制放顶 岩层控制 能量 

分 类 号：TD323[矿业工程—矿井建设]