摘要
本文依照莫尔－库仑屈服条件和非关联流动准则，从地应力场及地下巷道开挖工程特点出发，提出对围岩塑性屈服状态进行判定的方法。对无支护巷道和水泥锚杆支护巷道围岩进行有限元分析表明，巷道开挖以后及时支设锚杆，对出现塑性屈服的围岩起到了等效提高其刚度和强度的作用，从而增加了围岩稳定性。与现场实测结果对比说明，非关联流动准则比关联流动准则更符合实际。
According to Mohr-Coulomb yield condition and non-related flowing rule in consideration of the crustal stress field and engineering characteristics of underground gate,we propose a method for determing the plastic state of sorrounding rocks of gate. By FEM analysis of sourrounding rocks for the unsupported gate and bolt-supported gate,we got the result that to support the gate by bolt immediatly after digging the gate, it can improve the stiffness and strength equivalently of the surrounding rock.
出处
《工程地质学报》
CSCD
1996年第2期63-68,共6页
Journal of Engineering Geology
关键词
巷道支护
围岩
塑性状态
判定分析
锚杆
Morh-Coulomb yield condition, Flowing rule, FEM, Plastic state,Undergrounder rocks, Bolt.
