结合成庄矿运输大巷工程地质条件,分析了运输大巷失稳破坏机理。根据破坏机理,采用数值模拟和工程类比方法,提出了运输大巷采用高预应力强力支护系统设计方案,并对设计方案进行了试验,试验结果表明高预应力强力支护系统大幅度可提高围岩初期的支护强度和支护刚度,使围岩保持完整性和整体性,有效抑制围岩的不连续变形,从而提高了围岩自身的承载能力,在大幅度提高巷道掘进速度的同时,也降低了巷道支护成本。
Based on the engineering geological conditions of main haulageway in Cheng- zhuang Coal Mine, the unstable failure mechanism of main haulageway was analyzed. According to the failure mechanism, the design scheme that the main haulageway adopted strong support system with high prestress force was put forward by using numerical simulation and engineering analogy method, and the test with the design scheme was conducted. The results showed that the support system greatly raised the supporting intensity and supporting stiffness of surrounding rock at the initial stage, kept the surrounding rock unbroken and integral, and effectively sup- pressed the deformation of the surrounding rock, so improved the bearing capacity, which greatly raised the roadway excavation speed and reduced the costs of roadway support.