白皎煤矿余煤复采顶板控制及防灭火技术应用

发布时间：2018-03-11 20:39

本文选题：余煤复采　切入点：相似模拟　出处：《西安科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：我国煤矿安全问题日益突出，其中火灾是煤矿主要灾害之一，时刻威胁着煤矿井下的安全生产。采空区余煤复采是指对初次开采时的采肥丢瘦或不放顶煤而遗留在采空区内的部分资源进行的复采回收。白皎煤矿2024工作面是复采工作面，由于复采的是已经破碎的煤体，与初次开采相比，顶板和煤体的破碎给复采过程的安全保障工作带来较大的技术难题，顶板易冒落、难管理和巷道掘进难、维护繁重，同时受漏风的影响复采更容易发生火灾，，进而严重威胁复采的安全生产。本文结合白皎煤矿的矿井概况以及复采自燃的一般特点，分析了白皎煤矿2024复采工作面自然发火防治的重点。以白皎煤矿2024复采工作面为地质原型，开展物理相似模拟实验，掌握了2024复采工作面上覆岩层运动规律和岩层变形破坏移动规律。结合工作面自燃危险区域的判定理论，提高开采速度，从而有效地对煤自燃进行防治，最终确定了对白皎煤矿2024复采工作面顶板进行充填威尔浮加固管理，并且优化了顶板管理的工艺。根据复采煤自燃的特点，采取注胶体和液态CO_2综合煤自燃防治技术方案，并且顺利实施，完成回采。在撤架期间架后发现指标气体CO异常现象，又通过合理的设计进行补注胶体和液态CO_2，使得高温区域得到有效的控制，并且对治理效果进行分析，最后安全撤架。本次实践研究得出的结论，具有一定的参考意义和实用价值，可在类似矿井推广使用。
[Abstract]:The problem of coal mine safety is becoming more and more prominent in our country, among which fire is one of the main disasters in coal mine. It is always a threat to the safe production of coal mine. The remining of the remaining coal in goaf is the recovery of some of the resources left in the goaf when the first mining is lost or not caving. The 2024 face of Baijiao Coal Mine is a remining face. Compared with the initial mining, the broken roof and coal body bring great technical problems to the safety and security work of the remining process, and the roof is easy to fall, difficult to manage, difficult to dig in the roadway, and hard to maintain. At the same time, under the influence of air leakage, remining is more prone to fire, and then serious threat to the safety of mining production. Combined with the general situation of Baijiao coal mine and the general characteristics of spontaneous combustion, this paper analyzes the 2024 recovery of Baijiao coal mine. The key points of prevention and cure of spontaneous combustion in mining face. Taking 2024 compound mining face of Baijiao Coal Mine as geological prototype, the physical similarity simulation experiment was carried out. This paper grasps the movement law of overlying strata and the law of deformation, destruction and movement of overlying strata in 2024 compound mining face. Combined with the theory of judging the dangerous area of spontaneous combustion of coal face, the mining speed is improved, and the spontaneous combustion of coal is prevented and prevented effectively. Finally, it is determined that the roof of 2024 complex mining face of Baijiao Coal Mine will be filled with will floating reinforcement management, and the technology of roof management has been optimized. According to the characteristics of spontaneous combustion of coal in complex mining, the technical scheme of preventing and curing spontaneous combustion of coal by injecting colloid and liquid CO_2 is adopted. And the successful implementation, the completion of mining. After the shelf during the removal of shelves found the abnormal phenomenon of the index gas CO, and through a reasonable design to recharge colloid and liquid CO-2, so that the high-temperature area can be effectively controlled, and the treatment effect is analyzed. The conclusion of this practical study has certain reference significance and practical value and can be popularized and used in similar mines.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD327.2;TD75

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