风水沟煤矿特厚煤层采空区防灭火技术研究

发布时间：2018-11-25 14:37

【摘要】：在我国的北方，有许多矿区的煤层厚度超过8米，属于特厚煤层。特厚煤层的分层开采，因遗煤多、漏风严重等原因其采空区自然发火情况更为严重。本论文以平庄能源风水沟煤矿6-3B煤层为典型进行研究。该煤层的厚度平均为27.5米且煤岩软易冒落，，采空区内大量遗煤容易产生自然发火。一氧化碳主要来源于采空区的自燃氧化，是煤矿生产过程中常常被用来监测火灾事故的重要指标。但是，仅仅依靠对一氧化碳的检测并不能很好的确定采空区内自然发火的进程，因此需要对自然发火标志性气体进行分析和优选。本论文通过模拟煤自然发火等一系列相关实验，研究了如何确定适合该煤层采空区的自然发火预测预报的指标性气体的方法。采空区内一氧化碳的来源多样，一氧化碳的准确测定是确定采空区自然发火进程的一项重要工作。本论文研究了煤层在破碎割煤过程中产生的一氧化碳的情况，通过模拟煤破碎实验，初步确定了采空区内大约13%的一氧化碳属于煤破碎过程中生成。通过在现场采集工作面的气体成分、温度、风量、日回采距离及回采率等相关参数，结合煤自然发火危险区域判定理论，通过模拟，对采空区做出“三带”划分。最后，根据上述结论及矿井实际条件，提出了对该采空区实施注氮和灌浆并重的防灭火措施。
[Abstract]:In the north of our country, there are many mining areas of coal seam thickness over 8 meters, which belongs to super thick coal seam. The natural combustion in the goaf is more serious due to the stratified mining of extra thick coal seam and the serious air leakage. This paper takes 6-3 B coal seam of Pingzhuang Energy Fengshuigou Coal Mine as a typical study. The average thickness of the coal seam is 27.5 meters, and the coal is soft and easy to fall, and a large amount of coal left in the goaf is prone to spontaneous combustion. Carbon monoxide is mainly derived from spontaneous combustion and oxidation in goaf and is often used to monitor fire accidents in coal mines. However, the detection of carbon monoxide alone can not determine the process of spontaneous combustion in the goaf, so it is necessary to analyze and select the signature gas of spontaneous combustion. Based on a series of experiments such as simulating the spontaneous combustion of coal, this paper studies the method of determining the index gas which is suitable for the prediction and prediction of spontaneous combustion in the goaf of the coal seam. There are various sources of carbon monoxide in goaf, and the accurate determination of carbon monoxide is an important work in determining the spontaneous combustion process in goaf. In this paper, the situation of carbon monoxide produced in coal seam during coal crushing and cutting is studied. By simulating coal crushing experiment, it is preliminarily determined that about 13% of carbon monoxide in goaf belongs to the process of coal breaking. Based on the related parameters such as gas composition, temperature, air volume, daily extraction distance and recovery rate, combined with the theory of judging the dangerous area of coal spontaneous combustion, the "three zones" of goaf are divided by simulation. Finally, according to the above conclusions and the actual conditions of the mine, put forward the measures to prevent and extinguish the goaf with equal emphasis on nitrogen injection and grouting.
【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】：2013
【分类号】：TD753

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