卸压槽在钱家营矿-850石门支护工程中的应用

Application and analysis of pressure relief groove in support engineering in Shimen-850 of Qianjiaying Mine

随着煤炭资源开发向深部转移,深井开采所面临的小区域高应力富含带支护难题日益突出,为系统化研究现卸压槽对支护工程的影响,以较为典型的钱家营矿-850石门工程为背景,建立了UDEC离散元模型,对比研究了卸压槽开挖与否对于围岩应力转移、裂隙拓展及位移场分布的影响,同时结合可施工的范围,分析了卸压槽开挖尺寸大小对于激隙作用的影响,根据已经优化的多层次锚固+卸压槽+注浆为主的支护技术,分析了项目技术方案的围岩应力控制和裂隙拓展作用,评价了其支护效能。

With the deep mining of coal resources,the problem of high stress rich supporting in small area and deep mining was becoming more and more prominent.In order to systematize the influence of pressure relief groove on support engineering,the typical Qianjiaying Mine-850 cross-hole project was taken as the background,the UDEC discrete element model was established,and the influence of the stress transfer,crack expansion and displacement field distribution of surrounding rock with pressure relief trough or not was comparatively studied.Combined with the scope of construction,the influence of mining size of pressure relief groove on the action of excitation gap was analyzed.Based on the optimized multi-layer grouting technology of anchor and pressure relief groove,the stress control and crack expansion of surrounding rock of the project technical scheme were analyzed,and its support efficiency was evaluated.