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以某矿大断面复合顶板煤层巷道为研究对象,结合现场实际生产地质条件和目前支护存在的问题,分析了复合顶板煤巷围岩破坏特征及裂隙发育规律,探讨了大断面复合顶板巷道破坏失稳原因,在此基础上提出了高预应力锚杆锚索组合支护策略。现场实践表明:提出的支护策略对大断面复合顶板煤巷围岩的控制具有良好的效果,能为类似条件的巷道支护提供借鉴。
Based on the actual production geological conditions in the mine and the problems existing in the existing support, the author takes the coal mine roadway with a compound roof as a research object and analyzes the failure characteristics and fracture development rules of the surrounding rock of the compound roof coal roadway. On the basis of this, the paper proposed a combination of high prestressed anchor bolt and cable support strategy. The field practice shows that the proposed support strategy has a good effect on the control of the surrounding rock of large section compound roof coal roadway and can provide reference for the roadway support under similar conditions.