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.
出处
《煤炭科学技术》
CAS
北大核心
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)
关键词
上行开采
相似材料模拟
层间岩层
穿层裂隙
upward coal mining
similar material simulation
interlayer rock
cracks passing through strata
