突出矿井厚煤层分层开采防灭火技术研究

发布时间：2018-05-01 16:26

本文选题：分层开采 + 煤层自燃　；参考：《煤炭科学技术》2017年S1期

【摘要】：针对汝箕沟矿厚煤层分层开采期间易引发的煤炭自然发火问题,通过对Z210工作面风流沿线压能和Z209采空区各密闭内外及其附近巷道压能的测定,以及在裂缝释放SF6分析可知,Z210工作面通过二1煤采空区已和地面连通,防灭火重点是防止上部火区引燃Z210工作面后部采空区浮煤。通过实测和数据分析,Z210开切眼形成后,中段运输巷通风压力较大,进风通过掘进工作面漏向采空区,进而漏向工作面,同时也有部分风流漏向中段回风巷,Z210(1)工作面分层开采时主要漏风点在中段运输巷、回风巷掘进和工作面下隅角。当采空区覆岩大结构瞬时失稳以后,大面积顶板便向采空区快速运动,压缩采空区空气,冲击密闭墙。根据矿不同地点、环境和闭墙所需起的作用,合理地设计密闭墙结构、选择建闭材料和施工工艺,研究抗冲击泄压密闭墙基础参数,立足和完善矿井防灭火系统,建立以"治"和"防"相结合,以堵漏(隔离)、早期预报、采空区(火区)惰化等为发火防治对策,确保Z210(1)综采工作面开采过程的安全,并取得了良好效果。
[Abstract]:In view of the coal spontaneous combustion during the stratified mining of thick coal seam in Rujigou Mine, the pressure energy along the wind flow along Z210 face and the pressure energy of each closed inside and outside of Z209 goaf and its surrounding roadway are measured. According to the SF6 analysis of fracture release, it can be seen that the face of Z210 has been connected with the ground through the goaf of No. 21 coal, and the focus of fire prevention and fire prevention is to prevent the combustion of floating coal in the back of the mining area of Z210 working face in the upper fire area. After the formation of the opening and cutting holes of Z210, the ventilation pressure of the middle section of the transport roadway is greater, and the air passing through the drivage face leaks to the goaf and then to the working face. At the same time, there are also some air flow leakage to the middle section of return air roadway (Z2101). The main air leakage point is in the middle section transportation roadway, return air roadway driving and working face lower corner angle when stratified mining face. When the large overburden structure in goaf is unstable, the roof of large area moves rapidly to the goaf, compresses the air of goaf, and impinges on the closed wall. According to the effect of different location, environment and closed wall of mine, the structure of closed wall is designed reasonably, the construction materials and construction technology are selected, the foundation parameters of anti-shock pressure releasing closed wall are studied, and the fire prevention and extinguishing system of mine is established and perfected. In order to ensure the safety of the fully mechanized mining face Z210101, the measures of fire prevention and control, such as the combination of "control" and "prevention", and the prevention of leakage plugging (isolation, early prediction, goaf (fire) inert), have been established, and good results have been obtained.
【作者单位】：神华集团有限责任公司;
【分类号】：TD752.2

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