硫磺沟煤矿采空区瓦斯与煤自燃灾害协同防控技术研究

发布时间：2018-06-17 18:58

本文选题：瓦斯 + 煤自燃　；参考：《西安科技大学》2017年硕士论文

【摘要】：随着煤矿开采深度的增加,瓦斯涌出量增大,同时煤岩体受应力作用破碎性加强,煤自燃危险性加强。瓦斯与煤自燃灾害互相影响、互相制约,在生产现场灾害防治过程中要两者兼顾。因此,研究采空煤自燃与瓦斯灾害协同防控技术具有十分重要的意义。本文以兖矿集团新疆能化公司硫磺沟煤矿4-5煤层04综放工作面为工程背景,测试了硫磺沟煤矿04综放工作面煤氧化产物生成规律及特征温度值,选定将CO及C2H4作为判断煤体自燃的阶段性指标性气体。测试了煤样的坚固性系数、瓦斯放散初速度和吸附常数。分析了 4-5煤层、邻近煤层瓦斯相对涌出量,计算得出04综放工作面相对瓦斯涌出量为5.1m3/t。开展了物理相似模型实验,确定出04工作面的冒落带、裂隙带高度,得到了工作面的初次来压和周期来压步距。确定了适合04综放工作面在矿井现有抽采装备条件下的抽采负压、高钻孔布置参数,分析了瓦斯涌出量与日推进速度及日产量的关系,提出了适合硫磺沟煤矿04工作面瓦斯抽采下的采空区“三带”观测方案,判定了 04工作面瓦斯抽采下采空区“三带”分布规律,散热带范围距离工作面22～57m以内,窒息带距离工作面94～149m,工作面回风侧氧化升温带宽度70m,工作面中部50 ～80m。基于硫磺沟煤矿04综放工作面开采实际,构建了采空区瓦斯与煤自燃灾害协同防控技术思路,掌握了硫磺沟煤矿04综放工作面采空区瓦斯与煤自燃灾害协同防控工作面的合理抽采负压、钻孔参数、配风量、推进速度等关键参数。该技术的实施有效保障了硫磺沟煤矿04综放工作面的安全生产,该工作面自2015年5月推进以来,累计推进2300余米,期间未发生采空区浮煤自燃和瓦斯超限事故,实现了矿井安全高效生产,创造了良好的经济效益和社会效益。
[Abstract]:With the increase of coal mining depth, the amount of gas emission increases, at the same time, the fragmentation of coal and rock mass by stress is strengthened, and the danger of coal spontaneous combustion is strengthened. Gas and coal spontaneous combustion disasters affect each other and restrict each other. Both of them should be taken into account in the process of disaster prevention and control in production site. Therefore, it is of great significance to study the cooperative prevention and control technology of coal spontaneous combustion and gas disaster. Based on the engineering background of No. 04 fully mechanized caving face in 4-5 seam of Suhuangou Coal Mine of Xinjiang Neng Chemical Company of Yanzhou Coal Mine, the formation law and characteristic temperature value of oxidation product of coal in No. 04 fully-mechanized caving face of Suzhuangou Coal Mine are tested in this paper. Co and C _ 2H _ 4 are selected as the stage index gas to judge the spontaneous combustion of coal body. The coefficient of solidity, the initial velocity of gas release and the adsorption constant of coal samples were measured. The relative gas emission of 4-5 coal seam and adjacent coal seam is analyzed, and the relative gas emission of No. 04 fully mechanized caving face is calculated to be 5.1 m3 / t. The physical similarity model experiment was carried out to determine the height of falling zone and crack zone of working face 04, and the initial pressure and periodic step distance of working face were obtained. The parameters of drainage negative pressure and high borehole arrangement suitable for No. 04 fully mechanized caving face under the condition of existing mining equipment are determined, and the relationship between gas emission quantity and daily advancing speed and daily output is analyzed. The "three zones" observation scheme of goaf in No. 04 face of Sulphulangou Coal Mine is put forward, and the distribution rule of "three zones" in goaf of No. 04 face is determined. The range of heat dissipation zone is less than 2257 m from the working face. The distance of asphyxiating zone is 94 ~ 149m, the width of oxidation heating zone is 70m, and the middle part of the face is 50 ~ 80m. Based on the mining practice of No. 04 fully-mechanized caving face in Sulphulangou Coal Mine, the technical idea of coordinated prevention and control of gas and coal spontaneous combustion disaster in goaf is constructed. The key parameters, such as negative pressure, borehole parameters, air distribution, speed of advance and so on, are grasped in the goaf of No. 04 fully mechanized caving face of Suhuangou Coal Mine. The implementation of this technology has effectively guaranteed the safety production of No. 04 fully mechanized caving face in Suhuangou Coal Mine. Since the face was pushed forward in May 2015, it has pushed forward more than 2300 meters, and there have been no spontaneous combustion of floating coal and over-limit gas accidents in goaf during this period. The mine safety and efficient production has been realized, and good economic and social benefits have been created.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD712;TD752.2

【参考文献】