中文摘要：

针对赤峰市元宝山红庙矿2621运输顺槽保护煤柱留设问题,通过室内试验测定了煤、岩体的力学参数,采用极限平衡理论与数值模拟相结合手段,分析了围岩的位移和塑性区变化,最终确定了煤柱的合理宽度及巷道支护方案。研究结果表明：煤柱宽度越大,巷道与采空区塑性区范围、位移量越小,巷道越稳定,并最终确定煤柱留设宽度为25 m;2621运输顺槽巷道采用强力约束小煤柱的方法进行加固,即锚索＋大钢板＋注浆＋喷射混凝土的联合加固方法,使得顶底板移近量减少50.3%,左右帮收敛量减少81.0%,说明设计方案可有效控制巷道变形。

英文摘要：

In view of the issues in coal pillar＇s reserve in protecting 2621 transport crossheading of the Yuanbaoshan Hongmiao mine in Chifeng City, mechanical parameters of coal ore and rocks are determined by indoor test. With the combination of the limit equilibrium method and the numerical simulation, the displacement of surrounding rock and the change of plastic zone are analyzed to ultimately determine the reasonable width of coal pillar and the effective supporting scheme. The re- search indicated that the larger the protective coal pillar＇s width is, the smaller the mining and goafplastic range and the displacement of roadway tunnel area are. Then, the tunnel becomes more stable. Ultimately, the coal pillar＇s width is determined to be 25 m; 2621 transport crossheading roadway is reinforced under strong constraint of small coal pillar,that is,the combination of cable ＋ plate ＋ grouting and shotcrete. This method makes the roof and floor convergence decreased by 50.3% , two-side convergence decreased by 81.0%. This result illustrates that the design scheme above can effectively control the deformation of roadway.