摘要
为解决马泰壕煤矿110工作面回风巷道受二次采动影响及原有支护难以维持巷道稳定性等问题,采用现场调研、工程地质分析以及钻孔窥视等方法,可知煤层顶底板多为软弱岩层遇水易软化变形、应力环境复杂以及原有支护与围岩无法有效耦合是巷道围岩变形的主要原因。利用数值模拟研究了108工作面及110工作面采动对巷道稳定性的影响,提出了高强高预应力让压锚索网支护优化方案,综合利用数值模拟和井下工业试验对其进行验证。结果表明优化方案支护系统能够与围岩有效耦合,充分发挥高预应力锚杆的主动支护效果,增强巷道围岩力学性质,使巷道支护效率大幅提高,表面位移降幅明显。建立了马泰壕煤矿110工作面回风巷道锚网索耦合支护体系,为巷道安全高效生产提供了技术支持和安全保障。
In order to solve the problem that the return air way of 110 working face of Mattaihao Coal Mine is affected by secondary mining and it is difficult to maintain the roadway stability with the original support,the methods of field investigation,engineering geological analysis and drilling peep are adopted.The main reasons for the deformation of the roadway surrounding rock are that,the roof and floor of the coal seam are mostly soft rock strata that are easily softened and deformed when encountering water,the stress environment is complex,and the original support and surrounding rock cannot be effectively coupled.The influence of mining on roadway the stability in the 108 and 110 working faces is studied by numerical simulation,and the optimization scheme of high-strength and high pre-stress yielding anchor cable mesh support is proposed,which is verified by numerical simulation and underground industrial test.The results show that the support system of the optimized scheme can effectively couple with the surrounding rock,which gives full play to the active support effect of the high pre-stress anchor bolt,enhances the mechanical properties of the surrounding rock of the roadway,greatly improves the support efficiency of the roadway,and significantly reduces the surface displacement.The anchor mesh cable coupling support system of return air way in 110 working face of Mataihao Coal Mine has been established,which provides technical support and safety guarantee for safe and efficient coal production.
作者
程佳
CHENG Jia(Inner Mongolia Ordos Yongmei Mining Co.,Ltd.,Ordos 017212,China)
出处
《煤炭工程》
北大核心
2022年第11期84-89,共6页
Coal Engineering
关键词
采动影响
巷道支护
复合弱结构
锚网索支护
围岩稳定性
mining influence
roadway support
composite weak structure
anchor mesh cable support
surrounding rock stability
