Evolution of mining-induced stress and strata control in underground coal mines

被引：0
|
作者：
Kang H. [1 ,2 ,3 ]
Gao F. [1 ,2 ,3 ]
机构：
[1] Coal Mining Research Institute, China Coal Technology and Engineering Group Co. Ltd., Beijing
[2] Coal Mining Branch, China Coal Research Institute, Beijing
[3] State Key Laboratory of Intelligent Coal Mining and Strata Control, Beijing
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2024年 / 43卷 / 01期
基金：
中国国家自然科学基金;
关键词：
coal mines; in situ stress; mining engineering; mining-induced stress; strata control; stress evolution; support stress;
D O I：
10.13722/j.cnki.jrme.2023.1055
中图分类号：
学科分类号：
摘要：
Stress is the fundamental driving force causing deformation and damage of the surrounding rock in mining engineering underground spaces. Widespread and highly concentrated stress is a notable feature of mining-induced stress in underground coal mines. The stress field underground in coal mines includes the in-situ stress field，mining-induced stress field，and support stress field，together forming the comprehensive underground stress field. This article discusses the stress evolution characteristics of coal mine surrounding rock and the theory and technology of surrounding rock control，with stress as the main focus. Regarding in-situ stress，based on extensive field measurements of in-situ stress，the distribution characteristics and influencing factors of the underground stress field in Chinese coal mines were detailedly analyzed. Concerning mining-induced stress，a combination of theoretical analysis，numerical simulation，physical simulation，and field monitoring methods were employed. The evolution process of stress in the excavation face and roadway surrounding rock was comprehensively studied from multiple perspectives，and the mining-induced stress evolution characteristics and main influencing factors around the coal mining face were analyzed. In terms of support stress ， a series of roadway support test and simulation experiment platforms were independently developed. Systematic tests were conducted on rock bolts and roadway surface protective components under various complex load conditions，and their mechanical response characteristics and failure mechanisms were evaluated. The distribution characteristics and evolution laws of the support stress fields generated by various support methods，both in support itself and in the surrounding rock，were deeply studied. Based on the studies of in-situ stress，mining-induced stress，and support stress，the control mechanisms，design methods，support reinforcement materials，and control techniques of rock surface support，anchoring，modification，unloading，and combined methods were analyzed. Application examples emphasized hydraulic fracturing unloading technology and the synergistic control technology of support+modification+destressing. Underground tests and applications showed that the surrounding rock control technology based on mining-induced stress evolution significantly improved the stability and safety level of the roadway surrounding rock，achieving good rock control effects. Finally，the challenges in the study of underground stress fields in coal mines and the control of roadway surrounding rock were analyzed，and the future trends in surrounding rock stress testing and analysis，and the theory and technology of surrounding rock control were discussed. © 2024 Academia Sinica. All rights reserved.
引用
收藏
页码：1 / 41
页数：40
相关论文
共 108 条
  • [1] KANG Hongpu, Analysis on types and interaction of stress fields in underground coal mines[J], Journal of China Coal Society, 33, 12, pp. 1329-1335, (2008)
  • [2] KANG Hongpu, LIN Jian, Newdevelopment in geomechanics measurement and test technology of mine roadway surrounding rock[J], Coal Science and Technology, 29, 7, pp. 27-30, (2001)
  • [3] KANG Hongpu, LIN Jian, ZHANG Xiao, Research and application of in-situ stress measurement in deep mines[J], Chinese Journal of Rock Mechanics and Engineering, 26, 5, pp. 929-933, (2007)
  • [4] KANG Hongpu, LIN Jian, YAN Lixin, Et al., Study on characteristics of underground in-situ stress distribution in Shanxi coal mining fields[J], Chinese Journal of Geophysics, 52, 7, pp. 1782-1792, (2009)
  • [5] KANG Hongpu, JIANG Tieming, ZHANG Xiao, Et al., Research on in-situ stress field in Jincheng coal mining area and its application[J], Chinese Journal of Rock Mechanics and Engineering, 28, 1, pp. 1-8, (2009)
  • [6] KANG H P, ZHANG X, SI L P，, Et al., In-situ stress measurements and stress distribution characteristics in underground coal mines in China[J], Engineering Geology, 116, 3, pp. 333-345, (2010)
  • [7] KANG Hongpu, LIN Jian, ZHANG Xiao, Et al., In-situ stress measurements and distribution laws in Lúan underground coal mines[J], Rock and Soil Mechanics, 31, 3, pp. 827-831, (2010)
  • [8] KANG Hongpu, WU Zhigang, GAO Fuqiang, Et al., Effect of geological structures on in-situ stress distribution in underground coal mines[J], Chinese Journal of Rock Mechanics and Engineering, 31, pp. 2674-2680, (2012)
  • [9] CAI Meifeng, GUO Qifeng, LI Yuan, Et al., In-situ stress measurement and its application in the 10th mine of Pingdingshan coal group[J], Journal of University of Science and Technology Beijing, 35, 11, pp. 1399-1406, (2013)
  • [10] KANG Hongpu, YI Bingding，GAO Fuqiang, Et al., Database and characteristics of underground in-situ stress distribution in Chinese coal mines[J], Journal of China Coal Society, 44, 1, pp. 23-33, (2019)
12345678910