类孤岛工作面复采方案优选分析研究
Analysis study on selective preference of recovery mining project for island-like working face
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摘要: 孤岛工作面是我国煤炭开采的一个技术难题，强矿压显现是孤岛工作面的重要特征，下石节煤矿类孤岛工作面因采动矿压显现剧烈而停采封面。为实现资源有益回收，延长矿井剩余服务年限，实现该类孤岛工作面安全复采，在综合现场调研、数值模拟计算以及理论分析等方法的基础上，总结分析了220工作面动压显现特征及其发生机制，提出了220工作面扩面和缩面2种改造方案，并综合对比评价了2种复采方案的动压、水、火、瓦斯防治的危险性以及经济效益情况。研究结果表明：220工作面动压显现与周期来压、顶板活动紧密相关，超高应力、上位多层厚硬岩层、宽煤柱以及频繁煤炮等综合作用是矿压剧烈显现的根源。确定了扩面改造(内错2301采空区15 m）、缩面改造(缩短50 m）为最优复采方案。综合对比2种复采方案的整体风险性以及经济效益情况建议：220工作面采用缩面50 m进行复采，安装简易机头、机尾单电机的综放推移方式，视情况再决定是否替换过渡支架以及安装正规机头和电机。Abstract: Island working face is a technical problem of coal mining in China,strong ground pressure behavior is significant characteristic of island working face,the island-like working face in Xiashijie Coal Mine stopped mining and closed working face due to strong mining pressure behavior. In order to realize the beneficial recycling of resources,extend the remaining service life of the mine,and realize the safe re-mining of the island-like working face,on the basis of comprehensive site survey,numerical simulation calculation and theoretical analysis,this paper summarizes and analyzes the dynamic pressure behavior characteristics and its mechanism of No.220 working face,and puts forward two kinds of transformation schemes of No.220 working face expansion and contraction.The results show that the dynamic pressure behavior of No.220 working face is closely related to periodic roof weighting and roof activity,and the comprehensive effects of super-high stress,upper multi-layer thick and hard rock,wide coal pillar and frequent coal blasting are the root of strong mining pressure behavior. The optimal re-mining schemes is determined as expanding face reconstruction(15 m in internal displacement Goaf 2301) and reducing face reconstruction(shorten by 50 m). By comprehensively comparing the overall risks and economic benefits of the two mining schemes,it is suggested that the fully mechanized top coal caving mining should be carried out in the No.220 working face with a reduced face of 50 m,and a simple machine head and a single motor at the tail should be installed,and whether to replace the transition support and install the regular machine head and electric machine should be decided according to the situation.
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期刊类型引用(12)
1. 崔德伟. 厚煤层条件下多级让压支护技术研究. 煤. 2024(04): 36-39+43 . 
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2. 刘文超，赵毅鑫，郭继鸿. 新街矿区厚硬顶板条件邻空巷道冲击地压机理与控制. 煤田地质与勘探. 2024(10): 153-165 . 百度学术
3. 王凯兴，薛佳琪，潘一山，窦林名，肖永惠. 顶板-支护系统准共振诱发冲击地压机制研究. 岩土力学. 2023(03): 717-727 . 百度学术
4. 袁亮，王恩元，马衍坤，刘玉冰，李晓亮. 我国煤岩动力灾害研究进展及面临的科技难题. 煤炭学报. 2023(05): 1825-1845 . 百度学术
5. 高明仕，徐东，王海川，俞鑫，刘荣发. 特厚煤层巷道冲击破坏机理及全锚索支护技术. 煤炭学报. 2023(05): 1943-1956 . 百度学术
6. 程利兴，郭洁，高斌，周翔，李灵博，高健勋，李永元，李靖宇，李义朝，汪占领，周鹏赫. 轴向冲击荷载下锚索动力响应特征试验研究. 采矿与岩层控制工程学报. 2023(04): 35-43 . 百度学术
7. 乔建永. 采矿工程中的基础数学研究及其工程应用. 中国科学:技术科学. 2023(10): 1747-1762 . 百度学术
8. 赵洪宝，刘一洪，刘绍强，张嘉澔，吴桐. 考虑动载扰动作用的窄煤柱巷道底板失稳机制. 煤炭科学技术. 2022(02): 56-64 . 本站查看
9. 王爱文，范德威，潘一山，赵宝友，代连朋. 扩胀-摩擦式吸能防冲锚索及其力学特性. 煤炭学报. 2022(02): 695-710 . 百度学术
10. 朱斯陶，刘金海，姜福兴，尚晓光，孙希奎，张修峰，宋大钊，张明，王爱文，谢华东，曲效成. 我国煤矿顶板运动型矿震及诱发灾害分类、预测与防控. 煤炭学报. 2022(02): 807-816 . 百度学术
11. 鞠文君，杨鸿智，付玉凯，焦建康，李中伟，孙刘伟. 煤矿冲击地压巷道支护技术发展与展望. 煤炭工程. 2022(11): 1-6 . 百度学术
12. 安栋，陈征，宋义敏，宋嘉祺，许海亮. 冲击地压矿井巷道吸能防冲液压支架防冲效果研究. 煤炭科学技术. 2022(11): 12-19 . 本站查看
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