RESEARCH ON STRESS EVOLUTION LAW AND FAILURE CHARACTERISTICS OF TOP COAL IN FULLY MECHANIZED CAVING OF EXTRA-THICK COAL SEAMS

被引：1
|
作者：
LI, Hong-Bin [1 ,2 ]
LI, Dong-Yin [1 ]
Wang, Hao [1 ]
LI, Zhen-Feng [1 ]
Wang, Shen [1 ]
Chen, Chun-Ling [1 ]
机构：
[1] Henan Polytech Univ, Sch Energy Sci & Engn, Jiaozuo, Peoples R China
[2] Henan Polytech Univ, Coll Chem & Chem Engn, Jiaozuo, Peoples R China
来源：
THERMAL SCIENCE | 2023年 / 27卷 / 1B期
基金：
国家重点研发计划;
关键词：
extra-thick coal seams; top coal caving; stress evolution; failure structure of top coal;
D O I：
10.2298/TSCI2301687L
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this study, based on the engineering background of the No. 8222 working face of the Tashan coal mine in Shanxi Province, China, true triaxial experiments were carried out on Geotechnical Consulting and Testing Systems rock mechanics testing machine using cubic coal samples, and the numerical simulation was conducted through the FLAC3D software. Moreover, the stress evolution law of different layers of extra-thick coal seams and the failure mechanism of top coal in the fully mechanized caving were investigated, and the failure structure model of top coal was established. The results show that there are differences in the prin-cipal stress values at different layers of the top coal.
引用
收藏
页码：687 / 695
页数：9
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