极近距离煤层合层综放技术  

The technology on full mechanized caving with combine-layers in very contiguous seams

作　　者：杨胜利[1] 刘颢颢[1] 李杨[1] 郑立永[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭学报》2011年第3期371-376,共6页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50974123);中国矿业大学(北京)基本科研业务资助项目(2009QZ04)

摘　　要：为研究极近距离煤层合层夹矸的冒放性和顶煤采出率,以山西新柳煤矿极近距离煤层综放开采为工程背景,通过点荷载试验测试夹矸强度,分析夹矸对顶煤冒放性的影响;应用实验室相似模拟和PFC数值计算研究不同夹矸厚度的顶煤冒放性,确定了夹矸最大可放厚度;并应用顶煤跟踪系统,实现新柳煤矿顶煤采出率的现场测试。研究表明,夹矸强度、厚度、裂隙发育特征影响放煤效果显著;新柳煤矿10号、11号近距离煤层最大可放夹矸厚度不宜超过1.0 m;顶煤跟踪系统现场测试顶煤采出率达83.3%。To study the caving property of the rock parting and the recovery ratio of the top-coal in full-mechanized caving with combine-layers in very contiguous seams,based on the full mechanized caving in very contiguous seams in Xinliu Coal Mine and adopted the method of testing the strength of the parting with point loading test to analyze the influence of rock parting on top coal caving property.The largest caving thickness of rock parting was determined by means of similar simulation and PFC numerical calculation in the laboratory,the top-coal tracking system was used for practical surveying the recovery ratio of the top-coal.The results indicate that the caving effectiveness is concerned with the strength of the parting,the thickness of the parting and the features of relaxed crack,the largest caving thickness of rock parting between the very contiguous seams of No.10 and No.11 should not surpass 1.0 m in Xinliu Coal Mine,and the recovery tested by the top-coal tracking system reaches 83.3%.

关 键 词：极近距离煤层 合层综放技术 夹矸强度 PFC数值计算 顶煤跟踪系统 

分 类 号：TD823.2[矿业工程—煤矿开采]