薄基岩煤层大采高综采工作面漏顶机制及控制技术研究

发布时间：2018-01-28 12:25

本文关键词： 薄基岩直接顶漏顶长锚索　出处：《岩土力学》2017年06期 　论文类型：期刊论文

【摘要】：针对淮南矿区薄基岩煤层大采高综采工作面漏顶事故频发现象,采用实验室试验、理论分析及现场实测的方法对薄基岩工作面漏顶机制及控制技术进行深入研究。研究结果表明:薄基岩煤层大采高综采工作面顶板存在大小周期来压现象;直接顶的变形能与其所承接的上覆岩层自重成正比、与其岩体的弹性模量成反比关系;工作面漏顶与顶板来压密切相关,工作面顶板周期来压(关键层断裂回转)时,直接顶的变形能增加,导致直接顶岩体原生裂隙扩展、次生裂隙发育,从而增加漏顶的几率;采用废旧钢丝绳与注浆联合加固的方法对直接顶薄弱区域进行预加固,形成一个独特的空间网格加固结构,加固效果明显,能够有效防止工作面漏顶现象地发生。
[Abstract]:In view of the frequent roof leakage accidents in large mining height fully mechanized mining face of thin bedrock coal seam in Huainan mining area, laboratory tests are adopted. The mechanism and control technology of roof leakage in thin bedrock face are deeply studied by theoretical analysis and field measurement. The results show that there exists the phenomenon of periodic pressure on the roof of large mining height fully mechanized mining face in thin bedrock coal seam; The deformation energy of the direct roof is directly proportional to the self-weight of the overburden and inversely proportional to the elastic modulus of the rock mass. The roof leakage is closely related to the roof pressure. When the roof comes under periodic pressure (critical layer fracture and rotation), the deformation energy of the direct roof increases, which leads to the expansion of primary cracks and the development of secondary cracks in the direct roof rock mass. Thus increasing the probability of leakage; The method of combined reinforcement of scrap wire rope and grouting is used to pre-reinforce the direct roof weak area, and a unique spatial grid reinforcement structure is formed, and the reinforcement effect is obvious. It can effectively prevent roof leakage from occurring.
【作者单位】：安徽理工大学煤矿安全高效开采省部共建教育部重点实验室;安徽大学资源与环境工程学院;山东科技大学矿山灾害预防省部共建国家重点实验室培育基地;淮南矿业集团;
【基金】：国家自然科学基金项目(No.51574007) 国家自然科学青年基金(No.51604007) 安徽省博士后科研经费资助项目(No.DG155) 霍英东青年教师基金(No.141046)~~
【分类号】：TD327;TD771
【正文快照】： This work was supported by the National Natural Science Foundation of China(51574007 and 51604007),Anhui Postdoctoral Science Foundation(DG155),Fok Ying Tung Education Foundation(141046).大采高综采工作面的端面漏顶是煤矿生产中较为常见的事故,它不仅直接影响

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