摘要
某地下硐室群地质条件复杂,根据前期地质勘探揭露的地质资料,该硐室区存在大量的不良地质体(PH条带)。通过不同的计算分析方案,采用三维有限元数值分析软件MIDAS-GTS/NX,精确模拟了PH条带等大型地质结构面,研究地下硐室开挖过程中PH条带宽度与围岩变形及塑性区分布特征,并在此基础上对硐室群进行加强支护等措施。结果表明:地下硐室群的围岩稳定性与不良地质体的厚度有关,即PH条带宽度越大,对硐室群围岩稳定性影响越大。数值模拟结果较好地体现了不良地质体对围岩稳定性的破坏特征,可为制定大型地下硐室群的开挖设计和支护措施提供较好的科学依据。
The geological conditions of an underground chamber group are complex. According to the geological data revealed by the previous geological exploration,there are a large number of bad geological bodies(PH bands) in the chamber area. Through different calculation and analysis schemes,the three-dimensional finite element numerical analysis software MIDAS-GTS/NX is used to accurately simulate the PH strip and other large geological structural surfaces,and the width of the PH strip and the deformation and plasticity of the surrounding rock during the excavation of the underground chamber are studied. District distribution characteristics,and on this basis,measures such as strengthening the support and protection of the chamber group. The results show that stability of the surrounding rock of the underground chamber group is related to the thickness of the unfavorable geological body,that is,the greater the width of the PH band,the greater the influence on the stability of the surrounding rock of the chamber group. The numerical simulation results better reflect the damage characteristics of the poor geological body to the stability of the surrounding rock,and can provide a better scientific basis for the formulation of the excavation design and support measures for large-scale underground chamber groups.
作者
石广斌
肖清
魏娟盆
张雯
洪勇
SHI Guangbin;XIAO Qing;WEI Juanpen;ZHANG Wen;HONG Yong(School of Resources Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,China;Shannxi Key Laboratory of Geotechnical and Underground Space Engineering,Xi′an 710055,China)
出处
《金属矿山》
CAS
北大核心
2022年第4期84-89,共6页
Metal Mine
基金
国家自然科学基金项目青年基金项目(编号:51904220)
陕西省教育厅基金项目(编号:21JK0719)。
关键词
地下硐室群
不良地质体
有限元模拟
围岩稳定
underground chamber group
bad geological bodies
finite element simulation
stability of the surrounding rock
