深部巷道围岩变形失稳机理及其控制

Mechanism and Control of Deep Roadway Surrounding Rock Deformation and Instability

基于深部矿井准备巷道围岩变形破坏机理的研究和分析,根据王家寨煤矿三采区下山的地质条件,对其采用高强高预紧力锚杆和锚索组合整体支护及时支顶和护帮,使薄层状顶板转化为"厚度大、刚度高的预应力夹持组合岩板",两帮应力峰值区随之向围岩深部转移,进而实现顶板与两帮的互保与共稳。

Based on the research and analysis of deformation and failure mechanism of deep preparation roadway surrounding rock,according to the geological conditions of the third mining area of the Wangjiazhai Mine,the roof and the two sides should be overall and timely supported by the combination of bolts and cables with high strength and high pretension force,making the thin roof transfer a pre- stressed clamping combined rock board with large thickness and high rigidity. The stress peak area of two sides will be transferred to the deep surrounding rock,which makes the roof and two sides stable by protecting each other.