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采场大面积压架冒顶事故防治技术研究 被引量:37

Study on prevention and control technology of large area powered support jammed and roof falling accident occurred in coal mining face
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摘要 针对我国煤矿长壁工作面大面积压架冒顶事故时有发生,严重影响矿井安全高效生产的问题,通过案例调研、现场实测、模拟试验与理论分析,对我国采场大面积压架冒顶事故发生条件、发生机理及其防治对策进行深入系统的研究。结果表明:除坚硬顶板引起的大面积压架冒顶事故外,浅埋煤层开采、松散承压含水层下开采、特大采高开采等三类条件是我国煤矿近年来采场大面积压架冒顶事故的多(易)发条件;覆岩关键层破断结构因其上覆载荷过大而滑落失稳是造成上述三类条件下采场大面积压架冒顶的根源;根据具体开采条件下的覆岩关键层结构特征进行危险区域的预测是大面积压架冒顶灾害防治的前提,设计合理的支架工作阻力是防治压架冒顶的有效技术措施,但部分条件下单纯依靠提高支架工作阻力来防治大面积压架冒顶灾害仍难以实现,还需实施其他措施进行防范。 According to a large area powered supports jammed and roof falling accident occasionally occurred in mechanized longwall mining face in China,the mine safety and high efficient production was seriously affected. With the case investigation,site measurement,simulation experiment and theoretical analysis,a deep systematic study was conducted on roof falling accident occurred condition,occurred mechanism and prevention and control countermeasures of large area powered supports jammed and roof falling accidents occurred in China. The study results showed that except for large area powered supports jammed and roof falling accident occurred by the hard roof,three type conditions of shallow depth seam mining,seam mining under loose and pressurized aquifer and ultra high mining height mining would be multiple( easily) occurred conditions of large area powered supports jammed and roof falling accidents occurred in coal mining face in China. The breaking structure of the overburden key stratum due to the overburden strata loading too high to cause sliding and stability lost would be the basic sources of the large area powered supports jammed and roof falling occurred in the coal mining face under the above three type conditions. The prediction on danger area according to the overburden key stratum under certain mining condition would be the prerequisite to the prevention and control of the large area powered supports jammed and roof falling disaster occurred and rational designed working resistances of powered support would be effective technical measures to prevent and control powered supports jammed and roof falling. Under partial condition,only relied on the working resistances of the powered support increased would be hard to realize the prevention and control of the large area powered supports jammed and roof falling disaster and the prevention would need other measures to be conducted.
出处 《煤炭科学技术》 CAS 北大核心 2015年第6期1-8 47,47,共9页 Coal Science and Technology
基金 "十二五"国家科技支撑计划资助项目(2012BAK04B06) 国家自然科学基金资助项目(5174288 50974116)
关键词 特大采高 浅埋煤层 松散承压含水层 压架冒顶 关键层 ultra high mining height shallow depth seam loose and pressurized aquifer powered support jammed and roof falling key stratum
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参考文献3

  • 1鞠金峰.浅埋近距离煤层出煤柱开采压架机理及防治研究[D].中国矿业大学2013
  • 2Jinfeng Ju,Jialin Xu.Structural characteristics of key strata and strata behaviour of a fully mechanized longwall face with 7.0<ce:hsp sp="0.25"/>m height chocks[J]. International Journal of Rock Mechanics and Mining Sciences . 2013
  • 3Wang Xiaozhen,Xu Jialin,Zhu Weibing,Li Yingchun.Roof pre-blasting to prevent support crushing and water inrush accidents[J].International Journal of Mining Science and Technology,2012,22(3):379-384. 被引量:10

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