深部岩巷锚喷支护作用机理及其力学性能分析

Study on Mechanism of Bolt-shotcrete Support and Analysis of Its Mechanical Properties in Deep Rock Roadway

针对深部岩巷支护特征,对锚喷支护作用机理进行理论分析,结合皖北某矿西翼胶带机斜巷巷道实际情况,采用数值计算软件,对深部围岩巷道不同支护方式下围岩变形及其破坏规律进行数值模拟。对锚喷支护和喷射混凝土两种支护方式下围岩的应力、位移及塑性区的变化情况等进行系统地对比分析,同时对锚喷支护中改变锚杆间距进行数值分析。计算结果表明,岩巷锚喷支护显著提高了围岩的强度和承载能力,有效地控制了深部围岩巷道的变形和稳定。

According to the support features of deep rock roadway, a study on the mechanism and analysis of mechanical properties of bolt-shotcrete support in deep rock roadway was done, combined with the actual conditions of a prototype of inclined belt conveyor roadway in west wing of Wanbei mine. Deformation and failure rule of surrounding rock in deep rock roadway by different supporting methods was analyzed with numerical calculation software. What＇ s more, the stress, displacement and plastic zone changing of surrounding rock were systematically analyzed under bolt- shotcrete support and sbotcrete support comparatively, and the bolt spacing changing in bolt-shotcrete support was ana- lyzed at the same time. The numerical results showed that the bolt-shotcrete support significantly increased the strength and bearing capacity of surrounding rock, and effectively controlled the deformation and stability in deep rock roadway.