深井巷道掘进围岩演化特征模拟与扰动应力场分析

doi:10.13722/j.cnki.jrme.2017.0026

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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。

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	周辉1
	渠成堃1
	王竹春2
	3
	张传庆1
	胡善超3
	沈峥1
	杨凡杰1

关键词 ：采矿工程, 深井巷道, 原位监测, 开挖扰动区, 数值模拟, 围岩扰动应力场

Abstract：The disturbed stress field in deep mine roadway is closely related to the occurrence of excavation disturbed zone(EDZ). However，the geological conditions of site and the limitation of technology restrict the feasibility of in-situ monitoring to the disturbed stress field in deep mine roadway. Thus，the evolution of EDZ was instead obtained with the in situ monitoring firstly. Secondly，a numerical model was established by back analysis. The model is used to simulate the evolution of EDZ accurately. Finally，the evolution of disturbed stress field during the excavation of deep mine roadway was analyzed with this model. The results showed that the stress values of monitoring spots were not changed basically when the monitoring section was ahead of excavation plane due to the constraining of the rock in front of the excavation plane. When the excavation plane passed the monitoring section，the values and orientations of the principle stresses on the side，roof and floor were changed. The evolution of disturbed stress and EDZ were compared and found that they had some similar characteristics.

Key words： mining engineering deep mine roadway in-situ experiment excavation disturbed zone(EDZ) numerical simulation disturbed stress field of surrounding rock

引用本文:

周辉1，渠成堃1，王竹春2，3，张传庆1，胡善超3，沈峥1，杨凡杰1. 深井巷道掘进围岩演化特征模拟与扰动应力场分析[J]. 岩石力学与工程学报, 2017, 36(8): 1821-1831.
ZHOU Hui1，QU Chengkun1，WANG Zhuchun2，3，ZHANG Chuanqing1，HU Shanchao3，SHEN Zheng1，YANG Fanjie1. Simulating the variation of surrounding rock and analyzing the disturbed stress field during excavation of deep mine roadway. , 2017, 36(8): 1821-1831.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.0026 或 http://www.rockmech.org/CN/Y2017/V36/I8/1821

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