煤泥岩硐室群区巷道底臌控制机理及应用

发布时间：2019-01-24 08:09

【摘要】：煤矿巷道底臌治理一直是巷道支护中重点攻关的难题之一,作为永久巷道的马头门来说,底臌的有效控制尤为重要.针对霍州煤电集团辛置煤矿马头门巷道底臌量达到2 500mm的难题,首先从巷道围岩条件、应力条件、巷道空间位置和支护方式4个方面分析了引起巷道底臌的主要原因;其次,结合现有底板支护技术和马头门巷道底臌破坏的先后顺序和破坏特点,提出了底板治理的反底拱倒"T"型浇筑控制机理,采用反底无铰拱支护结构代替现有传统的底板平底浇筑结构,并分别利用数值计算和力学建模方法对比分析两种支护结构的弯矩承载力和支护效果,验证了无铰拱支护结构在抵抗源于底板地应力的弯矩方面有较大的优势;最后,设计了底板支护的详细支护参数,并制定了在底板治理实践期间的五步施工法,现场施工结果表明本底板治理技术有效控制了马头门底板的变形.
[Abstract]:The treatment of floor heave in coal mine is always one of the key problems in roadway support. As a permanent gateway, the effective control of floor heave is particularly important. In view of the difficult problem that the floor heave of Maotoumen roadway in Xinzhi coal mine of Huozhou Coal Power Group is up to 2 500mm, the main reasons causing the floor heave of roadway are analyzed from four aspects: surrounding rock condition, stress condition, space position of roadway and supporting method. Secondly, combined with the existing floor support technology and the sequence and failure characteristics of floor heave damage of Maotou Gate roadway, the control mechanism of inverted "T" type pouring with reverse bottom arch for floor slab treatment is put forward. In this paper, the reverse bottom hingeless arch support structure is used to replace the existing traditional floor slab pouring structure, and the moment bearing capacity and supporting effect of the two kinds of supporting structures are compared and analyzed by numerical calculation and mechanical modeling method respectively. It is verified that the non-hinged arch supporting structure has a great advantage in resisting the bending moment which originates from the ground stress of the floor. Finally, the detailed supporting parameters of the floor support are designed, and the five-step construction method during the practice of floor treatment is established. The field construction results show that the floor treatment technology effectively controls the deformation of the bottom plate of the horse head door.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;
【基金】：国家自然科学基金重点资助项目(51234005) 教育部博士学科点资助项目(20110023120002) 中央高校基本科研业务费资助项目(2009QZ10)
【分类号】：TD353

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