摘要
为解决厚冲击层薄基岩大断面开切眼稳定性控制难题,以赵固一矿16001工作面开切眼为工程背景,采用现场调研、数值模拟和现场工业性试验等相结合的研究方法,对厚冲积层薄基岩大断面开切眼稳定性控制技术进行系统研究。研究结果表明,复杂的高应力场、围岩强度低且层理裂隙发育、传统支护系统的预应力及强度不足是影响16001工作面开切眼稳定性的主要因素。提出了分次成巷减小巷道跨度的开掘方案、“高预应力锚网索+工字钢梁+单体”的联合支护技术,现场应用效果良好,顶板最大下沉量208 mm,两帮最大移近量170 mm,有效保证了开切眼围岩的稳定性,满足工作面设备快速安装的要求。
In order to solve the problem of stability control of large section open-off cut in thick alluvium and thin bedrock,taking the open-off cut in 16001 working face of Zhaogu No.1 Coal Mine as the engineering background,using the research methods of field investigation,numerical simulation and field industrial practice,the stability control technology of large section open-off cut in thick alluvium and thin bedrock was studied systematically.The results show that the main factors affecting the stability of 16001 working face including complex high stress field,low strength of surrounding rock and the development of bedding cracks,lack of prestress and strength of traditional support system.In this paper,the excavation scheme of subdivided into lanes to reduce the span of roadway and the combined support technology of“high prestresse anchor net cable+anchor cable beam+monomers”are proposed.The site application results are good,the maximum subsidence of the roof is 208 mm and the maximum movement of the two sides is 170 mm,which can effectively guarantee the stability of the surrounding rock of the open-off cut and meet the requirements of installing equipment rapidly of the working face.
作者
刘世峰
郭鹏
LIU Shifeng;GUO Peng(Zhaogu No.1 Coal Mine,Jiaozuo Coal Industry Group Co.,Ltd.,Henan Energy and Chemical Croup,Xinxiang 453034,China;College of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《矿业安全与环保》
北大核心
2022年第1期84-89,共6页
Mining Safety & Environmental Protection
关键词
薄基岩
大断面巷道
开切眼
分次成巷
高预应力
联合支护
数值模拟
thin bedrock
large section roadway
open-off cut
subdivided into lanes
high prestress
combined supporting
numerical simulation
