锚固节理煤岩巷道的损伤力学研究

Study into Damage Mechanics of Anchoring Reinforced Roadway in Jointed Coal-Rock Mass

岩体结构工程的稳定是矿山安全生产的前提和重要课题,岩石损伤力学及适合各种工程条件的计算软件为岩体工程研究提供了科学的理论和技术途径.本文利用岩石损伤力学理论,对锚、索加固节理岩体的损伤破坏进行了理论分析,建立了加锚、加索节理岩体贡献刚度矩阵的理论模型.利用ABAQUS数值计算软件,对节理煤岩巷道进行了支护方案优化设计,分析了支护岩体结构的损伤特征,总结了支护岩体结构的损伤变化规律.结果表明,利用岩石损伤理论和数值计算方法,可以实现岩体结构工程的支护优化设计,有效控制围岩损伤破坏的范围和程度.

Stability of rock structural engineering is the premise and important project for safety production in mine. Rock damage mechanics and computing software adapting different engineering conditions provide scientific theories and technological ways for studying rock engineering. Applying rock damage mechanics theory in this paper, we theoretically analyzed rock damage of supported jointed rock mass with bolt and anchor cable, built theoretical models of contributing stiffness matrix for anchoring reinforced jointed roadway with both bolt and anchor cable, and designed the optimal support scheme of jointed .coal-rock roadway by applying ABAQUS mathematical software. In addition, we analyzed the damage features and summarized the damage evolutionary rules of supported rock construction. The results show that the optimized support scheme of rock construction engineering can be designed by applying rock damage theory and numerical methods to effectively control the damage scope and degree of surrounding rock.