沿空留巷巷道围岩变形破坏特征及影响因素研究

为了研究沿空留巷巷道围岩变形破坏特征及影响因素，采用理论研究、数值模拟和现场实测相结合的方法，研究了沿空动压巷道围岩结构分类、沿空动压巷道围岩变形破坏特征以及围岩变形破坏影响因素。研究得出:巷道围岩层位的物理力学性质与护巷煤柱侧开挖空间的差异，把沿空动压巷道分为8个类型；围岩破坏主要集中在岩性较弱的巷道顶板以及护巷煤柱侧；影响巷道稳定性的主要因素有巷道开挖顺序与布置、构造应力、巷道支护、两次动压。研究对沿空动压巷道在采动影响下的围岩控制技术和破坏失稳机理提供了技术支持。

Study on deformation and failure characteristics and influencing factors of surrounding rock in roadway along goaf

In order to study the deformation characteristics and influencing factors of surrounding rock roadway along the roadway，the combination of theoretical research，numerical simulation and field measurement was used to study the surrounding rock structure classification and the surrounding rock deformation of the dynamic hydrodynamic roadway along the gob.Destruction characteristics and factors affecting the deformation and failure of surrounding rock，the results showed the difference between the physical and mechanical properties of the surrounding rock layer of the roadway and the excavation space of the coal pillar side of the roadway，and divide the dynamic pressure roadway along the air into 8 types；the damage was mainly concentrated on the roof of the roadway with weak lithology and the coal pillar side of the roadway.The main factors affecting the stability of the roadway were the sequence and arrangement of roadway excavation，tectonic stress，roadway support and two dynamic pressures.The research provides technical support for the surrounding rock control technology and the mechanism of failure and instability under the influence of mining in the dynamic hydrodynamic roadway.