蒋家河煤矿ZF201工作面采空区自燃防治技术的研究

发布时间：2018-05-27 07:04

本文选题：采空区 + 自燃“三带”　；参考：《辽宁工程技术大学》2015年硕士论文

【摘要】：煤矿火灾是我国煤矿五大灾害之一,不仅造成大量的煤炭资源损失,更为严重者造成重大的人员伤亡事故,而采空区自燃火灾占据煤矿火灾的绝大多数。在我国的许多煤矿,煤层属于厚煤层,随着近年来厚煤层综放开采的推广,造成了采空区遗煤多,漏风量大,易自燃煤层采空区自燃灾害更为严重的结果。因此研究易自燃综放工作面采空区自燃火灾的防治具有重要意义。结合蒋家河煤矿ZF201工作面采空区自燃灾害防治实际问题,采用理论分析、数值模拟计算、实验室实验和现场应用检验相结合的方法,对该矿煤炭自燃灾害的规律进行了系统研究。通过对采空区煤炭自燃主要影响因素的分析,明确了ZF201工作面采空区自燃火灾的研究重点。通过实验室测定ZF201工作面煤样的基础参数,得到了耗氧衰减率为0.533,煤的最短自然发火期为17天,实验煤样耗氧的最低氧气浓度为8.23%。设计了采空区束管监测系统,对采空区O2、CH4、CO等指标气体进行了监测,建立了该矿采空区自燃火灾预测预报系统,得到了采空区气体浓度分布规律。结合现场实际建立了采空区数值模型,运用Fluent对该矿的自燃危险性进行了的研究,得到了采空区自燃“三带”的分布规律,其中氧化带宽度最宽为125 m。最终选择了采空区注氮的技术措施进行采空区自燃的防治,并对治理效果进行了数值模拟预测,注氮后氧化带宽度最大为81 m。现场应用效果表明：自采取措施以来,未发生采空区自燃的征兆,说明该措施非常有效。研究成果为该矿的采空区自燃防治提供了可靠的理论支撑,避免了自燃灾害及其引发灾害的发生；并对地质采矿条件相近煤矿的采空区自燃灾害防治起到了示范作用。
[Abstract]:Coal mine fire is one of the five major disasters of coal mine in our country. It not only causes a lot of coal resource losses, but also causes serious casualties, and the spontaneous combustion fire in goaf occupies the vast majority of coal mine fires. In many coal mines in China, coal seam belongs to thick coal seam. With the popularization of fully mechanized caving mining in thick coal seam in recent years, it has resulted in more coal left in goaf, large air leakage, and more serious spontaneous combustion disaster in goaf of easy spontaneous combustion coal seam. Therefore, it is of great significance to study the prevention and control of spontaneous combustion in goaf in fully mechanized caving face. Combined with the practical problem of prevention and control of spontaneous combustion disaster in the goaf of ZF201 face of Jiangjiahe Coal Mine, the method of combining theoretical analysis, numerical simulation calculation, laboratory experiment and field application test is adopted. The regularity of spontaneous combustion disaster of coal in this mine is studied systematically. Based on the analysis of main influencing factors of coal spontaneous combustion in goaf, the research emphasis of spontaneous combustion in goaf in ZF201 face is defined. The basic parameters of coal samples in ZF201 face are measured in laboratory. The results show that the attenuation rate of oxygen consumption is 0.533, the shortest spontaneous combustion period of coal is 17 days, and the minimum oxygen concentration of experimental coal sample is 8.23. The monitoring system of goaf beam tube is designed, and the index gases such as O _ 2H _ 4H _ 4CO in goaf are monitored. The prediction and prediction system of spontaneous combustion fire in goaf is established, and the distribution law of gas concentration in goaf is obtained. The numerical model of goaf is established in combination with the field practice. The distribution of "three zones" of spontaneous combustion in goaf is obtained by using Fluent, and the width of oxidation zone is 125m. Finally, the technical measures of nitrogen injection in goaf were selected to prevent and control spontaneous combustion in goaf, and the control effect was predicted by numerical simulation. The maximum width of oxidation zone after nitrogen injection was 81 m. The results of field application show that there is no sign of spontaneous combustion in goaf since the measure was taken, which shows that the measure is very effective. The research results provide reliable theoretical support for the prevention and control of spontaneous combustion in goaf of the mine and avoid the occurrence of spontaneous combustion disaster and it also plays an exemplary role in the prevention and control of spontaneous combustion disaster in goaf of coal mine with similar geological and mining conditions.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD752.2

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