岩土力学 ›› 2020, Vol. 41 ›› Issue (12): 4078-4086.doi: 10.16285/j.rsm.2020.0441

• 岩土工程研究 • 上一篇    下一篇

深井孤岛工作面巷道围岩采动应力分区演化特征

程利兴1, 2, 3，姜鹏飞2, 3, 4，杨建威1, 2, 3，朱阳涛5， 郑仰发2, 3，张镇2, 3, 4，李冰冰5   

  1. 1. 中国矿业大学（北京）能源与矿业学院，北京 100083；2. 天地科技股份有限公司开采设计事业部，北京 100013；3. 中煤科工开采研究院有限公司，北京 100013；4. 煤炭科学研究总院 煤炭资源高效开采与洁净利用国家重点实验室，北京 100013； 5. 中煤新集阜阳矿业有限公司，安徽 阜阳 236153
  • 收稿日期:2020-04-16 修回日期:2020-06-14 出版日期:2020-12-11 发布日期:2021-01-18
  • 作者简介:程利兴，男，1987年生，博士研究生，主要从事煤矿巷道矿山压力及其岩层控制方面的研究。
  • 基金资助:
    国家重点研发计划（No.2017YFC0603003）；国家自然科学基金青年基金项目（No.51704160）；国家自然科学基金面上项目（No.51774186）。

Evolution characteristics of mining-induced stress partition of roadway surrounding rock on working face of deep island

CHENG Li-xing1, 2, 3, JIANG Peng-fei2, 3, 4, YANG Jian-wei1, 2, 3, ZHU Yang-tao5, ZHENG Yang-fa2, 3, ZHANG Zhen2, 3, 4, LI Bing-bing5   

  1. 1. School of Energy and Mining Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China; 2. Coal Mining and Designing Department, Tiandi Science and Technology Co., Ltd., Beijing 100013, China; 3. Coal Ming Research Institute Co., Ltd of CCTEG, Beijing 100013, China; 4. State Key Laboratory of Coal Mining and Clean Utilization, China Coal Research Institute, Beijing 100013, China; 5. Fuyang Mining Company Limited, China Coal Xinji Energy, Fuyang, Anhui 236153, China
  • Received:2020-04-16 Revised:2020-06-14 Online:2020-12-11 Published:2021-01-18
  • Supported by:
    This work was supported by the National Key R&D Program of China(2017YFC0603003), the Young Scholars of National Natural Science Foundation of China(51704160) and the General Program of National Natural Science Foundation of China(51774186).

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摘要： 针对深井孤岛工作面煤巷大变形问题，采用现场实测手段研究了回采过程中巷道和采空区应力动态演化规律以及巷道围岩变形破坏演化特征。研究结果表明：深井孤岛工作面巷道围岩应力演化与变形破坏具有显著的阶段性特征，工作面前方大于250 m范围，巷道围岩未受采动影响，围岩应力变化较小且变形主要集中在底板与煤柱肩窝；工作面前方100～250 m支护结构受力增大，巷道浅部围岩破碎，顶底板移近及煤柱内挤变形突出，巷道出现明显的非对称变形破坏；工作面前方100 m为强烈采动影响阶段，尤其是在工作面前方20～22 m围岩垂直应力与空间主应力变化比较剧烈，顶底板移近与两帮内挤变形更加突出，巷道围岩表现出明显的大变形破坏特征。根据采空区应力分区特征分析了顶板覆岩结构的动态演化过程。结合应力与变形破坏演化特征，提出了巷道支护对策，以期为深井巷道围岩控制提供一定指导。

关键词: 千米深井, 覆岩结构, 大变形, 应力演化, 孤岛工作面

Abstract: Aiming at large deformation of roadway on working face of deep island mining, the dynamic evolution law of the stress in roadway surrounding rock and goaf are studied by means of field measurement, and the evolution characteristics of deformation and failure of surrounding rock are analyzed. The results show that the stress evolution and deformation failure of surrounding rock on working face of deep island mining have obvious stage characteristics, when the distance from the working face is more than 250 m, the surrounding rock of the roadway is not affected by mining, so the stress of surrounding rock changes little, and the deformation is mainly concentrated in floor and coal pillar. The stress of the supporting structure is increased obviously in the range of 100?250 m in front of the working face, the shallow surrounding rock of the roadway is broken, and the coal pillar is squeezed and deformed, which causes the roadway to appear the obvious asymmetric deformation and failure. In the range of 100 m in front of the working face, the stage of strong mining influence occurs, especially in the range of 20?22 m in front of the working face, the vertical stress and space principal stress of the surrounding rock change more significantly, the roof and floor moving closer and the both sides of roadway deformation more prominent, which make the surrounding rock of the roadway shows obvious large deformation and failure characteristics. According to the characteristics of stress zoning in goaf, the dynamic evolution process of the covering rock structure is analyzed. Combined with the evolution characteristics of stress and deformation, the reform suggestions of roadway support are proposed to provide some guidance for the control technology of roadway surrounding rock in deep mine.

Key words: coal mines with depth more than 1 000 m, overlying strata spatial structure, large deformation, stress evolution, island working face

中图分类号: 

  • TU457
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