摘要
针对煤矿巷道冲击地压发生条件问题,考虑围岩锚固作用,通过解析分析得到巷道冲击地压的临界塑性区半径、临界载荷,并进行主要影响分析。结果表明,临界塑性区半径的影响因素为巷道半径、围岩模量比、内摩擦角和扩容角,与锚固参数无关。临界塑性区半径与巷道半径为线性正相关。临界载荷随黏聚力增大而线性增加。随内摩擦角的增大,临界塑性区半径缓慢减小,临界载荷快速增大。临界载荷随锚端预紧力的增大而线性增大。
Aiming at the conditions of rock burst occurring in coal mine roadway,considering the anchoring effect of surrounding rock,the critical plastic zone radius and critical load of rock burst in roadway are obtained through analytical analysis,and the main impact analysis is carried out.The results show that the influencing factors of the critical plastic zone radius are tunnel radius,surrounding rock modulus ratio,internal friction angle,and expansion angle,and have nothing to do with anchoring parameters.The critical plastic zone radius is linearly positively correlated with the tunnel radius.The critical load increases linearly with the increase of cohesive force.As the internal friction angle increases,the critical plastic zone radius slowly decreases and the critical load rapidly increases.The critical load increases linearly with the increase of pre tension force at the anchor end.
出处
《科技创新与应用》
2025年第4期74-80,共7页
Technology Innovation and Application
基金
河南省科技攻关项目(242102320214)
河南省高等学校重点科研项目(22B440001)
安阳市科技发展计划项目(2021C01SF029)。
关键词
冲击地压
锚杆加固
临界塑性区半径
临界载荷
临界支护阻力
rock burst
bolt reinforcement
critical plastic zone radius
critical load
critical support resistance
