高应力泥岩顶板巷道失稳模式及控制技术

Study on Instability Characteristic and Control Technology in High-stress Mudstone Roof Roadway

针对某矿运输巷蠕变大变形的工程难题,通过对巷道变形破坏特征及变形力学机制进行分析,确定了巷道围岩类型为高应力-节理化(HJ)软岩,其变形力学机制为Ⅰ_CⅡ_(ABD)Ⅲ_(ACE)复合型;基于"定量让压"支护理论,提出了"有强让压、壁后充填增阻、支架高强抗压"联合支护方案,并采用FLAC^(3D)数值模拟了其位移场、塑性区分布情况,验证了该方案的可靠性。

For the engineering problem of large creep rock is determined to be high stress and jointed （HJ） soft deformation, the type of roadway surrounding rock and the deformation mechanical mechanism is determined to be IcII ABDIIIACE through the analysis of the deformation and failure characteristics of the roadway and the deformation mechanism. Based on the support theory of quantitative pressure, puts forward a joint support scheme of strength pressure, wall back-filling compression and high pressure resistance of the bracket. In order to verify the reliability of the scheme, the displacement field and plastic zone distribution are simulated by FLAC3D.