| 深部回采巷道围岩零应变交界圈现象的模型试验研究 |
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| 引用本文： | 陈登红,华心祝,薛俊华,杨科. 深部回采巷道围岩零应变交界圈现象的模型试验研究[J]. 实验力学, 2015, 30(4): 506-514 |
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| 作者姓名： | 陈登红 华心祝 薛俊华 杨科 |
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| 作者单位： | 1.安徽理工大学 能源与安全学院, 安徽淮南 232001; 2.煤矿安全高效开采省部共建教育部重点实验室(安徽理工大学),安徽淮南 232001;1.安徽理工大学 能源与安全学院, 安徽淮南 232001; 2.煤矿安全高效开采省部共建教育部重点实验室(安徽理工大学),安徽淮南 232001;淮南矿业(集团)有限责任公司,深部煤炭开采与环境保护国家重点实验室, 安徽淮南 232001;1.安徽理工大学 能源与安全学院, 安徽淮南 232001; 2.煤矿安全高效开采省部共建教育部重点实验室(安徽理工大学),安徽淮南 232001 |
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| 基金项目： | 安徽省自然科学基金资助项目(1508085SQE211);国家自然科学基金重点资助项目(51134012);安徽理工大学引进人才科研启动基金(No.ZY521) |
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| 摘 要： | 以淮南矿区口孜东矿深部回采巷道为工程背景,采用真三轴模型试验装置模拟了从浅埋静水压力、深埋静水压力、初掘采动应力(K=1.5为1.5倍900m埋深静水压力,后同)到回采动压(K=2~3)等不同应力条件下,大、小两种尺寸的直墙拱形回采巷道围岩应变状态,获得了浅埋条件下巷道围岩浅部拉应变、深部零应变,以及深埋静水压力及初掘采动应力下,巷道围岩出现"零应变交界圈"现象及深埋回采高应力下非线性大应变的围岩应变特征。应变监测结果反映了深部回采巷道围岩变形破坏的动态演化过程,为巷道的稳定性控制提供了一定的思考。
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| 关 键 词： | 零应变交界圈 深部回采巷道 模型试验 非线性大应变 |
| 修稿时间： | 2015-04-09 |
Model Experimental Study of Zero Strain Junction Ring around Surrounding Rock of Deep Mining Gateway |
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| CHEN Deng-hong,HUA Xin-zhu,XUE Jun-hua and YANG Ke. Model Experimental Study of Zero Strain Junction Ring around Surrounding Rock of Deep Mining Gateway[J]. Journal of Experimental Mechanics, 2015, 30(4): 506-514 |
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| Authors: | CHEN Deng-hong HUA Xin-zhu XUE Jun-hua YANG Ke |
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| Affiliation: | 1.School of mining and safety, Anhui University of Science and Technology, Huainan 232001, Anhui, China; 2.Key Laboratory of Safety and High-efficiency Coal Mining Ministry of Education(Anhui University of Science and Technology), Huainan 232001, Anhui, China;1.School of mining and safety, Anhui University of Science and Technology, Huainan 232001, Anhui, China; 2.Key Laboratory of Safety and High-efficiency Coal Mining Ministry of Education(Anhui University of Science and Technology), Huainan 232001, Anhui, China;State Key Laboratory of Deep Coal Mining & Environment Protection, Huainan Mining Industry(Group) Co. Ltd, Huainan 232001, Anhui, China;1.School of mining and safety, Anhui University of Science and Technology, Huainan 232001, Anhui, China; 2.Key Laboratory of Safety and High-efficiency Coal Mining Ministry of Education(Anhui University of Science and Technology), Huainan 232001, Anhui, China |
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| Abstract: | Taking deep mining gateway of Kouzi Dong mine in Huainan mining area as engineering background, adopting real three axial model experimental device, surrounding rock strain states of arch mining gateway with two different size straight wall were respectively simulated under different stress conditions including shallow hydrostatic pressure, deep hydrostatic pressure, initial excavation stress (K=1.5 to times the depth of 900m depth hydrostatic pressure, the same after)and mining dynamic stress(K=2~3). Strain characteristics in surrounding rock were acquired such as tensile strain in shallow near surface mining gateway and zero strain in deep mining gateway. Under deep hydrostatic pressure and initial excavation stress conditions, zero strain junction ring in surrounding rock was revealed. Nonlinear large strain phenomenon was also observed under deep mining high stress condition. Monitored results of strain reflect the dynamic evolution of surrounding rock deformation and destruction in deep mining gateway, which provides a certain reference for deep mining gateway stability control. |
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| Keywords: | zero strain junction ring deep mining gateway model experiment nonlinear large strain |
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