通过采空区巷道的围岩稳定性控制研究

基于大通煤业材料大巷掘进过程中,面临通过小窑采空巷道破坏区时围岩应力集中、稳定性差、巷道施工难度大、安全危胁大等现状。通过理论分析、现场取样实验室参数测定、方案设计、专家会诊,提出了一次支护采用锚网索喷支护方式,二次支护采用钢筋混凝土边墙+矿用工字钢顶梁组合二次支护,通过公式推导和实践验证,采用的锚固方式和支护参数能够有效地控制围岩变形。

Study on Surrounding Rock Stability Control of Passing Goaf Layout Pattern

Datong mine material roadway encountered difficulties of rock stress concentration, poor stability, roadway construction and security threats, because through goaf roadway. Through theoretical analysis, field sampling laboratory parameters measured, program design, expert consultation, presented a support using anchor net shotcrete method using secondary support miners, steel reinforced concrete sidewall + roof beam secondary support on the roof separation monitoring results show that the anchoring methods and parameters can effectively control anchoring rock deformation.