孤岛工作面采前冲击危险性预评估研究

朱广安; 窦林名; 丁自伟; 解嘉豪

doi:10.11779/CJGE201805006

孤岛工作面采前冲击危险性预评估研究 English Version

朱广安^{1, 2},
窦林名^3,,
丁自伟^{1, 2},
解嘉豪³

1. 西安科技大学能源学院,陕西西安 710054;
2. 西安科技大学西部矿井开采及灾害防治教育部重点实验室,陕西西安 710054;
3. 中国矿业大学深部煤炭资源开采教育部重点实验室矿业工程学院,江苏徐州 221116

详细信息

作者简介:
朱广安(1989- ),男,江苏建湖人,讲师,主要从事冲击矿压、矿山压力、采矿地球物理等方面的研究。E-mail: zhuguangan@163.com。

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出版历程
- 修回日期: 2017-03-09
- 发布日期: 2018-05-24

Pre-evaluation for rock burst risks in island longwall panel before mining

1. School of Energy Engineering, Xi’an University of Science and Technology, Xi'an 710054, China;
2. Key Laboratory of Western Mine Exploitation and Hazard Prevention, Ministry of Education, Xi'an 710054, China;
3. Key Laboratory of Deep Coal Resource Mining, Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou 221116, China

摘要

摘要: 为研究开采扰动下孤岛工作面冲击危险性,基于覆岩空间结构理论分析了开采前后两侧采空区顶板结构动态变化和力学响应。首先基于能量力学模型,推导了工作面开采后覆岩演化高度的计算公式。根据两侧采空区顶板结构的不同,将孤岛工作面覆岩结构分为长臂对称“T”结构、短臂对称“T”结构和非对称“T”结构。进而通过理论分析了3种孤岛工作面覆岩结构的应力传递机制,建立了孤岛工作面静载荷、动载荷估算模型,进而提出了工作面支承压力估算方法,并构建了孤岛工作面采前冲击危险预评估体系。采用估算模型及评估方法,对朝阳煤矿3112孤岛工作面进行了冲击危险性评估,为现场实践提供理论依据。
- 孤岛工作面 /
- 覆岩结构 /
- 覆岩演化高度 /
- 应力分布 /
- 冲击危险性
Abstract: In order to investigate the rock burst risk in an island longwall panel, the dynamic evolution and mechanical response of roof structures over goafs are analyzed based on the theory of spatial structures. First of all, the energy mechanical model is adopted to calculate the height of destressed zone above the mined panel. The spatial structures of overburden above the island panel are classified into three categories based on field observations and speculation: long-arm “T”, short-arm “T” and asymetric “T”. Subsequently, the model for calculating the average static and dynamic stresses is established, and the estimation formulas are derived by analyzing theoretically stress transfer mechanisms. Also, the estimation methods for abutment stress are proposed, and the pre-evaluation system is established for rock burst risks in an island longwall panel before mining. Finally, the proposed model is used to determine the stress distribution of the side abutment of longwall panel 3112 in Chaoyang Coal Mine, and the monitoring of ground subsidence verifies the rationality of this model. The findings obtained in this study provide a theoretical guidance for safe mining in coal mines.
- island longwall panel /
- overburden structure /
- height of destressed zone /
- stress distribution /
- rock burst risk

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参考文献(20)

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孤岛工作面采前冲击危险性预评估研究 English Version

作者简介: 朱广安(1989- ),男,江苏建湖人,讲师,主要从事冲击矿压、矿山压力、采矿地球物理等方面的研究。E-mail: zhuguangan@163.com。

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出版历程

Pre-evaluation for rock burst risks in island longwall panel before mining

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出版历程

目录

作者简介:
朱广安(1989- ),男,江苏建湖人,讲师,主要从事冲击矿压、矿山压力、采矿地球物理等方面的研究。E-mail: zhuguangan@163.com。