深井巷道掘进围岩演化特征模拟与扰动应力场分析

发布时间：2018-05-26 08:18

本文选题：采矿工程 + 深井巷道　；参考：《岩石力学与工程学报》2017年08期

【摘要】：深井巷道围岩扰动应力场与开挖扰动区的形成密切相关。然而,受现场地质条件和监测技术制约,尚难以准确获得围岩扰动应力的演化过程。为此,首先通过原位监测得到深井巷道围岩开挖扰动区的演化特征;然后,基于监测结果利用反分析的方式构建能较为准确地模拟围岩开挖扰动区演化特征的数值模型;最后,通过这一模型分析了深井巷道掘进过程中围岩扰动应力场的演化特征。研究结果表明:当工作面未掘进至监测断面时,由于工作面前方岩体空间约束,测点应力值基本没有变化;当工作面掘进过监测断面后,巷道帮部、顶底板的主应力大小和方向均发生了变化;通过对比扰动应力场与原位监测得到的开挖扰动区的演化特征,发现两者的部分演化特征较为相似。
[Abstract]:The disturbance stress field of deep roadway surrounding rock is closely related to the formation of excavation disturbance zone. However, it is difficult to accurately obtain the evolution process of disturbance stress in surrounding rock, which is restricted by field geological conditions and monitoring technology. Therefore, the evolution characteristics of surrounding rock excavation disturbance zone of deep well roadway are obtained by in-situ monitoring. Then, based on the monitoring results, a numerical model which can accurately simulate the evolution characteristics of surrounding rock excavation disturbance zone is constructed by using the method of back analysis. Finally, Based on this model, the evolution characteristics of surrounding rock disturbance stress field during deep roadway excavation are analyzed. The results show that when the face is not heading to the monitoring section, the stress value of the measuring point is basically unchanged due to the space constraint of the rock mass in front of the face, and when the working face is driven past the monitoring section, the roadway side, The magnitude and direction of the principal stress of the roof and bottom plate have been changed, and by comparing the disturbed stress field with the evolution characteristics of the excavation disturbance zone obtained by in-situ monitoring, it is found that the evolution characteristics of the two regions are similar to each other.
【作者单位】：中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室;兖矿集团济宁三号煤矿;山东科技大学矿业与安全工程学院;
【基金】：国家重点基础研究发展计划(973)项目(2014CB046902) 国家自然科学基金资助项目(51404240,51427803)~~
【分类号】：TD322

【相似文献】