Pressure relief mechanism of roof cutting of Fa'er coal mine in Guizhou and the evolution law of ground pressure during secondary mining

被引：0
|
作者：
Yang X. [1 ,2 ]
Cheng M. [1 ,2 ]
Wang J. [1 ,2 ]
Zhang W. [1 ,2 ]
机构：
[1] State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology(Beijing), Beijing
[2] School of Mechanics and Civil Engineering, China University of Mining and Technology(Beijing), Beijing
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2023年 / 42卷 / 10期
基金：
中国国家自然科学基金;
关键词：
mine pressure law; mining engineering; roof cutting and pressure relief; secondary mining; surrounding rock control;
D O I：
10.13722/j.cnki.jrme.2022.1206
中图分类号：
学科分类号：
摘要：
In order to effectively study the stability of mining face and roadway surrounding rock during the secondary mining period，to ensure that there will be no safety hazards in the whole process of secondary mining，and to ensure the perfect and reasonable on-site support scheme，based on the geological condition of the 50305 working face of Fa'er coal mine，the deformation of roadway surrounding rock and mining face stress during secondary mining face of 50305 working face are analyzed systematically，so as to use reasonable support measures. Through theoretical analysis，the mechanical fracture criterion of secondary mining roadway roof is studied，and the scope of the failure zone is determined in advance. Through the numerical simulation，the mining face stress during the working face mining is analyzed in detail，and the roadway stress and displacement are analyzed in detail，which provides a reference for the use of reasonable advance support measures during the secondary mining to ensure safe mining. Through the field analysis，the surface displacement and deformation of roadway and hydraulic support load during secondary mining are analyzed，and the field application effect and whether there are shortcomings are observed to provide reference for other mines. The secondary mining roadway is supported with constant resistance anchor cable，U-section steel and temporary support，and the secondary mining effect of self-formed roadway without coal pillar is good. © 2023 Academia Sinica. All rights reserved.
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页码：2358 / 2371
页数：13
相关论文
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