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急倾煤层沿空软岩巷道变形破坏机理复杂,多次采动影响下巷道维护难度大.利用现场调研实测、物理相似模拟实验和数值模拟分析,对赵家坝急斜煤层群重复采动沿空软岩巷道变形破坏机理进行了深入分析结果表明:赵矿急斜巷道变形破坏是十分复杂的时间、空间问题,即在初次采动阶段:非对称岩体结构及应力分布导致巷道变形失稳;二次扰动阶段:非对称原岩应力释放机理导致巷道变形失稳;三次、四次扰动阶段:拱脚效应与层间压剪变形失稳机理导致巷道变形失稳,为该类型巷道支护形式与参数的选择提供了科学依据.
The mechanism of deformation and failure of soft rock roadway along the clearance of emergency coal seam is complex and it is very difficult to maintain the roadway under the influence of multiple mining.Using the field investigation and physical analogy simulation experiment and numerical simulation analysis, The deformation and failure mechanism of the empty soft rock roadway is analyzed in depth. The results show that the deformation and failure of the rapidly inclined tunnel in Zhao mine is a very complex time and space problem, that is, the initial mining phase: the asymmetry rock mass structure and the stress distribution lead to the instability of the roadway deformation ; Secondary disturbance phase: Asymmetric stress relaxation mechanism of the original rock led to deformation of the roadway instability; third and fourth disturbances: the arch foot effect and the instability mechanism of the interlaminar shear deformation led to instability of the roadway, for this type of roadway support The choice of form and parameters provides a scientific basis.