岩土力学 ›› 2022, Vol. 43 ›› Issue (7): 1913-1924.doi: 10.16285/j.rsm.2021.1743

• 岩土工程研究 • 上一篇    下一篇

软弱厚煤层沿空留巷变形破坏特征及控制研究

王凯1, 2，杨宝贵1，王鹏宇2，李冲3   

  1. 1. 中国矿业大学（北京） 能源与矿业学院，北京 100083；2. 山西潞安矿业（集团）有限责任公司 古城煤矿，山西 长治 046100； 3. 中国矿业大学 矿业工程学院，江苏 徐州 221116
  • 收稿日期:2021-10-15 修回日期:2022-04-26 出版日期:2022-07-26 发布日期:2022-08-04
  • 作者简介:王凯，男，1990年生，博士研究生，主要从事巷道支护与围岩稳定性控制方面的研究。
  • 基金资助:
    国家自然科学基金项目（No. 51874277）

Deformation and failure characteristics of gob-side entry retaining in soft and thick coal seam and the control technology

WANG Kai1, 2, YANG Bao-gui1, WANG Peng-yu2, LI Chong3   

  1. 1. School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; 2. Gu-cheng Coal Mine of Shanxi Lu’an Mining Group, Changzhi, Shanxi 046100, China; 3. School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
  • Received:2021-10-15 Revised:2022-04-26 Online:2022-07-26 Published:2022-08-04
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51874277).

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摘要： 针对软弱厚煤层综放开采沿空留巷动压显现明显，顶板易出现不均匀切顶下沉等问题。通过现场调研、理论分析和数值模拟，阐明了软弱厚煤层综放开采沿空留巷动压显现特征和变形机制，提出了软弱厚煤层沿煤层顶板布置沿空留巷变形协同支护体系。研究结果表明：综放开采采出厚度大，沿煤层底板留巷时沿空留巷煤层顶板承载能力差，“底板−巷旁支护体−顶板”支护体系载能力不协调，是造成软弱厚煤层沿空留巷产生大变形的主要原因；沿煤层顶板留巷变形协同支护体系的提出提高了沿空留巷帮部、顶底板及巷旁支护体的协同承载能力，可有效地保证软弱厚煤层沿空留巷的围岩稳定。研究成果在古城煤矿的成功应用，证明了该支护体系在软弱厚煤层综放沿空留巷中的可行性。

关键词: 软弱厚煤层, 沿空留巷, 巷旁支护, 协同变形

Abstract: In order to solve the problems of the obvious dynamic pressure, roof cutting subsidence and large deformation of the gob-side entry retaining in soft and thick coal seam fully-mechanized top-coal caving mining. The dynamic pressure characteristics and deformation mechanism of gob-side entry retaining are clarified, through field investigation, theoretical analysis and numerical simulation. A deformation coordinated support system of gob-side entry retaining arranged along the roof of soft and thick coal seam is proposed. The results show that the mining thickness of fully-mechanized top-coal caving mining is large, when retaining the gob-side entry along the coal seam floor, the bearing capacity of the coal roof is poor and the bearing capacity between the floor, gob-side entry filling body and roof support system is uncoordinated, which are the main reasons for the obvious dynamic pressure and large deformation of the gob-side entry retaining in the soft and thick coal seam. The proposal of the deformation coordinated support system in gob-side entry retaining along coal seam roof improves the coordinated bearing capacity of the coal wall, roof, floor and gob-side entry filling body, which can effectively ensure the stability of surrounding rock in the soft and thick coal seam gob-side entry retaining. The successful application of the research results to Gu-cheng Coal Mine proves the feasibility of the support system in soft and thick coal seam fully-mechanized coal caving mining gob-side entry retaining.

Key words: soft and thick coal seam, gob-side entry retaining, roadway side support, coordinated deformation

中图分类号: TD 353.6
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