双结构面对岩体强度影响的模拟分析  

Simulation Analysis of Rock Mass Strength Affected by Dual Structural Plane

作　　者：尹立明[1] 张培森[1] 

机构地区：[1]山东科技大学矿山灾害预防控制教育部重点实验室,山东青岛266510

出　　处：《采矿与安全工程学报》2010年第4期600-603,共4页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50874070);教育部博士点基金项目(20080424004);山东省自然科学基金项目(Y2008F01)

摘　　要：通过理论分析与数值模拟相结合的方法,分析了双结构面对岩体强度的影响.研究表明,影响结构面滑移变形的主要因素有应力集中系数、采深、结构面倾角和结构面的力学参数.在结构面力学参数一定的情况下,应力集中系数越大及采深越大,结构面产生滑移变形的可能性越大;结构面倾角越小,产生滑移变形的可能性越大.采空区上部小角度结构面产生滑移变形是导致离层、产生底鼓的机制之一;两个弱面之间相互干扰、叠加影响了岩体的抗压强度,当两个弱面中有任一个弱面与轴线成30°时岩体抗压强度最小.We analyze the influence caused by dual structural plane through theoretical analysis in combination with numerical simulation.The study show that the main factors that affect slip deformation of structural plane are the stress concentration,mining depth,structural plane inclination and the mechanical parameters.In the case that the mechanical parameters of the structure plane are fixed,the greater the stress concentration and the deeper the mining depth are,the more possible the structural plane has a sliding deformation.The smaller the structural plane is,the more possible the the structural plane has a sliding deformation.The small-angled structural plane in upper part of goaf is one of the factors producing sliding deformation and leading to bed separation and floor heave;Mutual interference and superimposition between two weak planes affect compressive strength of rock mass,when either of the two weak planes and axis is 30°,the compressive strength of the rock mass will reach its minimum.

关 键 词：双结构面 岩体强度 模拟分析 滑移变形 FLAC3D 

分 类 号：TD313[矿业工程—矿井建设]