考虑水压影响的M-C准则修正及数值模拟  

M-C Criterion Modification and Numerical Simulation with the Consideration of Effects of Hydraulic Pressure

作　　者：张明璐[1] 赵同彬[1,2] 姚旺[3] 

机构地区：[1]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [2]黑龙江科技大学黑龙江省煤矿深部开采地压控制与瓦斯治理重点实验室,黑龙江哈尔滨150027 [3]北京科技大学土木与环境工程学院,北京100083

出　　处：《山东科技大学学报（自然科学版）》2015年第2期19-24,共6页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51474136);黑龙江省煤矿深部开采地压控制与瓦斯治理重点实验室开放基金项目(F2313-09)

摘　　要：地下水对岩体工程的稳定性具有重要影响。基于岩石有效应力原理修正M-C准则,以FLAC3D中的M-C模型为基础,推导修正模型H-M-C中的拉应力屈服函数,剪切、拉伸势函数,实现该模型的FLAC调用。分别采用M-C模型与H-M-C模型进行巷道稳定性的数值模拟分析,对比不同水压作用下模型计算结果的差异。结果表明,H-M-C本构模型可以较好地用于水压力作用的数值模拟计算,水压力造成巷道变形增加、塑性区的范围变大,围岩更易发生破裂。Groundwater plays an important role in the stability of rock mass engineering. In this paper, M-C criterion under the hydraulic pressure was modified based on effective stress principle of rock; tensile stress yieht function, shearing and stretching potential function for the modified H M C model were derived based on M-C model in FLAC^3D so that the constitutive model could be called by FLAC. Numerical simulations were made on roadway stability with M-C model and H-M-C model respectively and model computation resuhs under different hydraulic pressures were compared. The results show that the constitutive model of H-M-C can be better used for numerical simu- lation of hydraulic pressure effect when compared with M-C model. The hydraulic pressure brings about larger road-way displacement and plastic zone and rock fracture is easier to occur.

关 键 词：M-C准则 有效应力 水压力 数值计算 

分 类 号：TD313[矿业工程—矿井建设]