Stability quantitative evaluation and grading support technology of roadway surrounding rock in small and medium coal mine

被引：0
|
作者：
Jiao J. [1 ,2 ,3 ]
Zhang Z. [1 ,2 ,3 ]
Yan L. [1 ,2 ,3 ]
Zhou Y. [1 ,2 ,3 ]
Li J. [1 ,2 ,3 ]
Cui Q. [1 ,2 ,3 ]
机构：
[1] Coal Mining Research Institute Co Ltd of CCTEG, Beijing
[2] Coal Mining and Design Department, Tiandi Science & Technology Co Ltd, Beijing
[3] Coal Mining Branch, China Coal Research Institute, Beijing
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2022年 / 39卷 / 03期
关键词：
Grading support; Quantitative evaluation; Roadway surrounding rock; Small and medium coal mine;
D O I：
10.13545/j.cnki.jmse.2021.0377
中图分类号：
学科分类号：
摘要：
The geomechanical parameters of small and medium coal mines are generally scarce, the stability evaluation of roadway surrounding rock lacks quantitative methods and indicators, and the roadway support design mainly is based on experience. Based on systematic tests and analysis of engineering geological conditions of roadway surrounding rock, the strength of roadway surrounding rock, the development thickness of fracture zone in rock, the value of geostress and the mining-induced stresses has been determined as the key factors affecting the stability of roadway surrounding rock in small and medium coal mines of Jinyang Coal Business Department. Based on strength and structure of surrounding rock, and the in-situ measurement results of geostress, three comprehensive indexes have been proposed, including roof stress intensity factor, coal stress intensity factor and roof looseness coefficient. Further, three comprehensive indexes have been cross combined, and the stability of roadway surrounding rock has been quantitatively evaluated with the degree of roadway ground pressure behavior. According to classification results, combined with the mining influence, roadway service life, roadway span and other conditions, the classification support form and support parameters of roadway surrounding rock based on prestressed anchor rods support have been proposed, which have been successfully applied in engineering to ensure the stability in the process of roadway excavation and mining. Research results have certain theoretical significance and practical value for improving the roadway support technology level of small and medium coal mines. © 2022, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
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页码：598 / 606
页数：8
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