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论文中文题名:

 乌东煤矿急倾斜煤层综放面冲击地压致灾机理与防治研究    

姓名:

 董帅    

学号:

 18203213033    

保密级别:

 公开    

论文语种:

 chi    

学科代码:

 085218    

学科名称:

 工学 - 工程 - 矿业工程    

学生类型:

 硕士    

学位级别:

 工程硕士    

学位年度:

 2021    

培养单位:

 西安科技大学    

院系:

 能源学院    

专业:

 矿业工程    

研究方向:

 动力灾害防治    

第一导师姓名:

 崔峰    

第一导师单位:

  西安科技大学    

论文提交日期:

 2021-06-22    

论文答辩日期:

 2021-06-03    

论文外文题名:

 Mechanism and prevention of rock burst in steep inclined coal seam fully mechanized caving face in Wudong    

论文中文关键词:

 冲击地压 ; 急倾斜煤层 ; 水平分段综放开采 ; 灾害防治    

论文外文关键词:

 rock burst ; steep coal seam ; horizontal sublevel fully mechanized caving mining ; disaster prevention    

论文中文摘要:

乌东煤矿北采区主采煤层为43#煤层和45#煤层,两煤层倾角均为43°~51°,属于急倾斜煤层,采用水平分段综放开采的采煤方法。近年来乌东煤矿冲击地压日益凸显,给矿井安全生产带来了隐患。乌东煤矿冲击地压是急倾斜煤层特殊开采条件下的动力灾害。因此,对其致灾机理与防治方法的研究具有重要意义。
论文以乌东煤矿急倾斜煤层综放面冲击地压与防治研究为背景,综合运用工程调研、岩石力学实验、物理相似模拟、数值模拟和工程实践等方法,对乌东煤矿冲击地压致灾机理进行了系统性研究,结果表明:急倾斜煤层特殊的赋存环境和强烈的地质构造作用使得煤岩具有较高的冲击倾向性;采用水平分段综放开采的采煤方法,增大了煤层开采强度,煤层采出后易形成空间结构,随煤层开采深度的增加,工作面开采扰动应力与深部地应力的相互叠加,造成了工作面顶板侧出现应力集中的现象,当覆岩空间结构突然发生失稳时,极易诱发工作面冲击地压的显现;针对急倾斜煤层综放面冲击地压的致灾机理,从围岩弱化(注水)和顶板卸压(爆破)方面,构建了急倾斜煤层综放面冲击地压的综合防治方法,结合现场钻孔窥视和顶板裂隙瞬变电磁监测的方法,验证了冲击地压的防治效果。
论文研究揭示了乌东煤矿急倾斜煤层综放面冲击地压致灾机理,提出了工作面冲击地压针对性防治方法,确保了工作面安全高效开采,为我国类似条件下急倾斜煤层综放面的安全开采提供了参考。

论文外文摘要:

The main coal seams in the north mining area of Wudong coal mine are 43# and 45#, and the dip angle of coal seam is 43° to 51° which belongs to steeply inclined coal seam. Adopting horizontal section fully-mechanized caving mining method. In recent years, the frequent occurrence of rock burst in Wudong coal mine has affected the safety of the mine. Rock burst in Wudong coal mine is a kind of dynamic disaster under special mining conditions of steep coal seam. Therefore, it is of great significance to study the mechanism and prevention methods of rock burst.
Based on the working face of Wudong coal mine as the background, this paper studies the mechanism and prevention methods of rock burst in Wudong coal mine by means of engineering investigation, rock mechanics test, physical similarity simulation and so on. The results show that the special occurrence environment and strong geological structure of steeply inclined coal seam make the coal and rock have a high impact tendency; horizontal section fully-mechanized caving mining method increases the mining intensity of the coal seam, and the space structure is easy to form after the coal seam is mined out. With the increase of coal seam mining depth, the superposition of mining stress and deep ground stress results in the phenomenon of stress concentration on the roof of the working face. When the structure of overburden rock suddenly becomes unstable, it is easy to induce the appearance of rock burst on the working face. Aiming at the disaster mechanism of rock burst in fully mechanized top coal caving face of steep coal seam, the comprehensive prevention and control method of rock burst in fully mechanized top coal caving face of steep coal seam is constructed from the aspects of surrounding rock weakening (water injection) and roof pressure relief (blasting). The prevention and control effect of rock burst is verified by the method of borehole television and transient electromagnetic monitoring of roof cracks.
The research results of this paper reveal the disaster mechanism of rock burst in fully mechanized top coal caving face of steep seam in Wudong coal mine, put forward the targeted prevention methods of rock burst in working face, ensure the safe and efficient mining of working face, and provide a reference for the safe mining of fully mechanized top coal caving face of steep seam under similar conditions.

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中图分类号:

 TD324    

开放日期:

 2021-06-23    

无标题文档

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