上行开采覆岩裂隙演化规律与层间岩层稳定性研究  

Study on crack evolution law of overburden strata and stability of interlayer rock in upward coal mining

作　　者：邵小平[1] 武军涛[1] 张嘉凡[2] 张杰[1] 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]西安科技大学理学院,陕西西安710054

出　　处：《煤炭科学技术》2016年第9期61-66,共6页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51204133);陕西省教育厅科研计划资助项目(13JS064)

摘　　要：为了研究陕北东峁煤矿上行开采的可行性,采用相似材料模拟试验研究方法,模拟研究了东峁煤矿典型工作面上行开采过程中的覆岩裂隙演化规律与层间岩层稳定性情况。结果表明:东峁煤矿下部5^(-2)煤层工作面回采推进328 m过程中,共产生10条穿透了上部3^(-2)煤层的上行裂隙;3^(-2)煤层工作面回采时在推过这些上行穿层裂隙之处,没有出现滑落失稳与台阶下沉现象;5^(-2)煤层开采不会引起3^(-2)煤层剧烈的变形破坏,开采3-2煤层对层间岩层所引起的应力变化对3^(-2)煤层影响程度较弱,保证3^(-2)煤层开采处于一个稳定的底板之上,实践表明东峁煤矿实施上行开采是可行的。In order to study the feasibility of a upward coal mining in Dongmao Mine of Northern Shaanxi Province,a study method with the similar material simulation test was applied to simulate and study the overburden rock crack evolution law and the interlayer rock stability condition. The results showed there were 10 cracks passing through the upward cracks in the top No. 3^-2seam occurred in 328 m pushing process of the coal mining face in the low No. 5^-2seam of Dongmao Mine. During the mining process of the coal mining face in No. 3^-2seam,when the coal mining face was pushed forward passing through those upward cracks in the strata,there was no sliding falling and instability and no bench subsidence phenomenon occurred. The mining in No. 5^-2seam would not cause a serous deformation failure in No. 3^-2seam,the mining in No. 3-2seam would cause the stress variation from the interlayer rock less influence to No. 3^-2seam,thus the mining in No. 3^-2seam would be ensured in a stable floor and the practices showed that the upward mining practiced in Dongmao Mine was feasible.

关 键 词：上行开采 相似材料模拟 层间岩层 穿层裂隙 

分 类 号：TD353[矿业工程—矿井建设]