基于增量型本构关系的深埋巷道开挖面附近围岩统一解  

Surrounding rock unified solution near deep-buried roadway excavation work face considering incremental constitutive relationship

作　　者：彭瑞[1] 孟祥瑞[1] 赵光明[1] 李英明[1] 左超[1] 

机构地区：[1]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《中国矿业大学学报》2015年第3期444-452,共9页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(51134012;51174005;51374013)

摘　　要：为了准确地评价矿山巷道开挖面附近围岩的安全性,基于统一屈服准则和增量型本构关系,分段地分析开挖面"空间效应"影响范围内的围岩稳定性;通过算例分析巷道各项安全性指标(即多种屈服准则解如:原岩应力阈值、围岩应力和位移分布、塑性区边界线)受岩石抗剪强度参数以及应力卸载或集中等的影响程度,由现场实测数据验证;为研究受开挖面"空间效应"影响的区段,引入了"虚拟支护阻力",并给出"空间效应"影响段围岩的各项安全性指标的解析解.工程实践表明,本文计算结果符合实际.An accurate evaluation for adjacent rock safety around mine roadway drivaging work- face was presented. Segmental analysis is done with surrounding rock stability within the range influenced by space effect of excavation workface by considering unified yield criterion and in- cremental constitutive relation. Impact of rock shear strength, stress unloading or concentra- tion on such safety index as original rock stress threshold, surrounding rock stress, displace- ment distribution and plastic zone boundary is analyzed with the help of the example, as is veri- fied by data from field test.＇ Virtual support resistance＇ is introduced to study the segment influ- enced by excavation workface space effect, and surrounding rock analytical solution of each safety indexes influenced by space effect is given. Engineering practice shows that the result of this paper is accordance with the actual case.

关 键 词：统一屈服准则 Levy-Mises本构关系 开挖面 

分 类 号：TD322[矿业工程—矿井建设]