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为了实现旗山矿区埋深1 032 m的北翼联络大巷变形破坏巷道的稳定性控制,采用现场地质调查、物理力学实验、物化微观结构分析、地应力测量、数值模拟、现场试验应用等手段,分析了围岩的软岩特性、煤夹层结构、高地应力水平、支护设计不合理等因素是造成巷道失稳的主要因素,分析了该类型巷道的变形破坏机理,并揭示了该类型巷道由于巷道围岩体结构中存在煤夹层引起岩层中存在薄弱面,造成了巷道的非对称性变形破坏现象.针对该类型巷道变形破坏特点,提出了非对称耦合补强支护下的控制对策及支护设计方,并在现场进行了工业应用.研究结果表明:采用非对称耦合补强控制对策下的设计方案,可以充分利用锚索、注浆锚杆、底角锚杆等对引起非对称变形破坏的关键部位进行加强支护,有效地消除巷道围岩关键部位产生的差异性变形,使得巷道围岩稳定性大大提高.
In order to realize the stability control of the deformation and failure roadway in the northern wing of the coal mine with a depth of 1 032 m in the Qishan mining area, the on-site geological survey, physical mechanics, physical and chemical microstructure analysis, in-situ stress measurement, numerical simulation and on- , The characteristics of soft rock in surrounding rock are analyzed. Factors such as coal sandwich structure, high ground stress level and unsuitable support design are the main factors that cause roadway instability. The deformation and failure mechanism of the roadway is analyzed, Due to the presence of coal intercalation in the surrounding rock mass of the roadway, there is a weak surface in the rock formation, which leads to the asymmetric deformation and failure of the roadway.According to the deformation and failure characteristics of this type of roadway, Support design, and carried out in the field of industrial applications.The results show that: Asymmetric coupling reinforcement control countermeasures under the design, you can make full use of anchor, grouting anchor, anchor at the corner of the cause of asymmetry Deformation and destruction of the key parts to strengthen the support effectively eliminate the key parts of roadway surrounding rock produced by the differential deformation, making the roadway rock stability Greatly improved.