超长孤岛工作面回采巷道应力分布及卸压控制

Stress Distribution and Pressure Relief Control of Mining Roadway in Super Long Island Working Face

本文针对山西前湾煤矿超长孤岛工作面巷道围岩控制的难题,采用理论分析、数值模拟和现场实测方法,研究了采动巷道围岩的变形特征和应力演化规律,提出卸压控制原理和技术参数。监测结果表明:卸压巷道使得应力向巷道围岩深部转移,巷道表面位移量明显减少,超长孤岛工作面巷道围岩变形得到了有效的控制。

In view of the difficult problem of surrounding rock control in super long isolated island working face in Qianwan coal mine of Shanxi Province,the deformation characteristics and stress evolution law of surrounding rock of mining roadway are studied by means of theoretical analysis,numerical simulation and field measurement,and the pressure relief control principle and technical parameters are proposed.The monitoring results show that the stress is transferred to the deep part of the surrounding rock,the displacement of the roadway surface is obviously reduced,and the deformation of the surrounding rock in the super long island working face is effectively controlled.