摘要
针对某矿在褶曲断层区的孤岛煤柱中开掘巷道时遇到支承应力大、煤岩体破碎、巷道断面大等技术难题,基于预应力锚索桁架支护系统可以改变巷道围岩受力状态的特征,结合该矿现场条件,设计并优化了联合控制方案中的锚索桁架支护参数。现场实施结果表明,以锚索桁架为主的联合控制技术能够解决极高应力作用下大断面煤巷支护难题。
The coal tunnel is excavated in isolated coal pillar area in a mine, and some technical problems are met, such as super-high abutment pressure, broken coal and rock, large section and so on. Aiming at these problems and according to the characteristics that the pre-stressed cable truss system can change the stress state of surrounding rock, the joint support technology is designed combined with the field conditions of the mine. Field implement shows that the joint support technology based on cable truss can solve the support problems of large section coal tunnel with super-high abutment stress.
出处
《金属矿山》
CAS
北大核心
2012年第5期32-34,40,共4页
Metal Mine
基金
国家重点基础研究发展计划(973计划)项目(编号:2010CB226800)
煤炭资源与安全开采国家重点实验室自主研究课题(编号:SKLCRSM10B08)
中央高校基本科研业务费专项资金项目(编号:2010YZ02)
关键词
孤岛煤柱
反拱作用
锚索桁架
煤巷
Isolated coal pillar, Anti-arch action ,Table truss, Coal tunnel
