摘要
围岩表面的相对湿度高于围岩内部的相对湿度,其湿度梯度可视为一种驱动力促使水份向低湿度区扩散,造成围岩力学性质弱化。地下洞室开挖过程中,围岩处于新的湿度环境中,力学性能会发生改变。采用数值计算软件RFPA湿度扩散版,对矩形煤巷围岩的湿度扩散进行了数值模拟。分析出湿度扩散对矩形煤巷围岩的应力场扰动状况和巷道内壁由于湿度扩散作用随时间的位移变化情况,模拟出不同岩层分布的巷道在湿度扩散中围岩破坏的形成、发展过程以及围岩破坏的形态。
When relative humidity of surface of surrounding rock mass is higher than that of internal surrounding rock mass,the humidity gradient between two zones is seen as a driving force which can make water diffuse into low humidity zone,while mechanical properties of surrounding rock mass is weaken.Surrounding rock mass is in a new humidity condition when underground cavern is excavating,which will change mechanical properties.Numerical simulation was done on humidity diffusion of rectangular coal tunnel by RFPA humidity diffusion edition.Disturbance status of stress field in rectangular coal tunnel rock affected by humidity diffusion and displacement situation with time passing of tunnel inner wall because of the humidity diffusion effect was obtained.The forming,development process and failure pattern of surrounding rock mass in humidity diffusion of tunnel of different stratum distribution were simulated.
出处
《现代矿业》
CAS
2011年第5期18-20,42,共4页
Modern Mining
关键词
矩形煤巷
湿度扩散
围岩破坏
数值计算
Rectangular coal tunnel
Humidity diffusion
Failure of surrounding rock mass
Numerical calculation
