摘要
作者通过应用东北大学岩石破裂与失稳研究中心开发的RFPA2D程序模拟巷道在侧向压力作用下的破坏过程,了解巷道围岩在侧向压力作用下围岩应力分布状态和围岩非线性渐进破坏机理。巷道围岩在侧向压力作用下首先在巷道拱顶左侧及底板右侧产生拉破坏。产生拉破坏后,应力集中程度减弱。接着应力场向远处转移,最后远处形成的拉裂纹与拱顶右侧及底板左侧的剪切裂纹贯通,造成巷道的失稳破坏。这些研究工作,对于将来调整矿体回采顺序,选择安全合理的支护方案以及改善围岩应力分布状态,具有一定的指导意义。
By using RFPA^2D , which is developed at Center for Rock Instability and Seismicity Research of Northeastern University, authors simulated the progressive process of laneway failure caused by lateral pressure, knew well the stress distribution of rock wall and nolinear progressive fracture. Firstly, tensile cracks took place in the left side of the laneway arch, as well as in the right side of the laneway bottom. After it had taken place, stress concentration will died down. Stress field will also transferred far from the laneway. Finally far tensil cracks connected with shear cracks around the laneway, caused the laneway lose the stability. Simulation and analyzing the failure progress of laneway caused by lateral pressure, is help to choosing supporting mode and adjusting mining sequence.
出处
《中国矿业》
北大核心
2006年第3期54-57,共4页
China Mining Magazine
基金
国家自然科学基金重大项目:深部岩体力学基础研究与应用资助(5049027)
辽宁省自然科学基金项目(20022156)
