含夹矸厚煤层沿空巷道围岩稳定性及支护技术研究  

The research on stability and supporting technology of rock in gob-side entry in thick seam with parting

作　　者：裴孟松[1,2] 鲁岩[1] 郭卫彬[1] 王飞龙 赵占全[1] 

机构地区：[1]中国矿业大学矿业工程学院,深部煤炭资源开采教育部重点实验室,江苏徐州221116 [2]河内地矿大学采矿工程学院,越南河内100803 [3]西山煤电集团公司杜儿坪煤矿,山西太原030022

出　　处：《采矿与安全工程学报》2014年第6期950-956,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51174192);中央高校基本科研业务费专项基金项目(2010QNA32);江苏省研究生创新工程项目(CXZZ11-0310);江苏省高校优势学科建设工程项目

摘　　要：为保障含夹矸厚煤层综放沿空巷道的稳定性,确保工作面的安全高效开采,采用数值模拟分析了不同夹矸条件下沿空巷道围岩的应力分布、塑性区分布以及巷道围岩的位移。研究表明:夹矸的存在破坏了巷道围岩的连续性,使得围岩稳定性较差;厚层夹矸条件下,巷道围岩较稳定;当夹矸硬度与煤层硬度相近以及夹矸位于巷道顶部时,巷道围岩稳定性相对较好。在此基础上,提出了合理围岩控制技术,确定选用锚网索配合梯形钢带联合支护的方式,并提出了合理的支护参数;通过工程实践2验证了含夹矸厚煤层沿空巷道围岩控制技术的合理性,确保了工作面的安全高效生产。In order to ensure the stability of the thick coal seam with parting in gob-side entry in longwall top coal caving, and to increase the safety and effectiveness in mining, the numerical model has been employed to analyse the stress distribution of gob-side entry, plastic strain area distribution and movement of rocks under the different conditions of dirt bands. Result of research shows that the existence of band layers has destroyed the continuity of the surrounding rock, which causes the roads becoming unstable; while in the thick layers, surrounding rocks are relatively stable. When hardness of the layers and that of coal seam are the same, and these bands lay on the top of road, the rocks surrounding the roads are also relatively stable. And on this basis, an appropriate technique of surrounding rock control is proposed, in which a combination of rock bolting-wire mesh and steel rectangular shape support are chosen and the suitable parameters are identified. Engineering practice has proved the rationality of the proposed technique, ensuring the safety and effectiveness in long wall extraction.

关 键 词：含夹矸厚煤层 沿空掘巷 巷道变形 围岩控制 

分 类 号：TD323[矿业工程—矿井建设]