小煤窑火区下采煤工作面防火技术研究

发布时间：2018-04-12 07:01

本文选题：煤层自燃 + 小煤窑火区　；参考：《安徽理工大学》2013年硕士论文

【摘要】：自然发火是煤炭着火一种客观现象,也是煤矿自然灾害最为严重的一种。漏风是造成采空区遗煤自燃的重要原因。小煤窑开采方法简单,浪费严重,开采后遗留煤量大,一旦小煤窑采空区有充足供氧条件,时间一长就会发生煤炭自燃着火。大矿在下部开采后,采空区顶板垮落,由于层间距小,就会和小煤窑采空区或废巷贯通,产生漏风,为其提供氧气来源,使得遗煤氧化自燃升温,最终着火,严重威胁着矿井安全生产。根据相关资料,废弃小煤窑采空区遗煤自燃着火导致的矿井火灾占了90%以上。解决矿井的防灭火问题,治理小煤窑自燃火灾就成了煤矿安全生产中的重点。本文针对西山煤电股份有限公司西曲煤矿上覆小煤窑采空区着火的特点,提出了以火区信息检测技术为主的综合防灭火技术方案。在对西曲矿29210工作面采空区上覆小煤窑火区信息检测过程中,在理论研究方面应用红外热像技术和漏风检测技术的相关理论进行了研究。在实验分析方而,通过煤的交叉点温度实验,得出了西曲矿8煤和9煤的自燃临界点和自燃倾向性。在现场探测应用方面,通过对西曲矿29210工作面进行的示踪气体检测,并对收集的气体进行的具体分析,检测出可能存在的漏风通道,勘察出一些可能引起煤炭自然发火的漏风源。并通过红外热像技术观测对内部热源温度及表面温度的监测和对比分析,可以判断隐蔽火源的存在,运用反演公式计算得出的小煤窑距离,最后针对可能引起自燃发火的区域制订了相应措施,为西曲煤矿进一步进行综合防灭火设计提供了可靠依据。
[Abstract]:Spontaneous combustion is not only an objective phenomenon of coal ignition, but also one of the most serious natural disasters in coal mines.Air leakage is an important cause of coal spontaneous combustion in goaf.The mining method of small coal kiln is simple, the waste is serious, and the amount of coal left behind is large after mining. Once there is sufficient oxygen supply condition in the goaf of small coal mine, coal spontaneous combustion will occur for a long time.After mining in the lower part of a large mine, the roof of the goaf collapses. Because of the small interval between the layers, it will pass through the goaf or the waste roadway of the small coal kiln, resulting in air leakage, which will provide a source of oxygen for the coal, which will cause the coal to be oxidized and self-ignited, which will eventually catch fire.It is a serious threat to mine safety.According to the relevant data, 90% of the mine fires caused by spontaneous combustion of coal left in the goaf of abandoned small coal mines accounted for more than 90%.To solve the problem of mine fire prevention and fire prevention and control small coal mine spontaneous combustion fire has become the focus of coal mine safety production.In view of the fire characteristics of the overlying small coal mine goaf in Xiqu Coal Mine of Xishan Coal and Power Co., Ltd., this paper puts forward a comprehensive fire prevention and fire extinguishing technology based on the information detection technology of the fire area.In the process of detecting the information of overlying small coal mine fire area in 29210 face of Xiqu Coal Mine, the theory of infrared thermal image and air leakage detection technology are studied in theory research.On the basis of experimental analysis, the critical point and tendency of spontaneous combustion of No. 8 and No. 9 coal in Xiqu Coal Mine are obtained through the temperature experiment at the intersection point of coal.In the field detection and application, by detecting the tracer gas in 29210 face of Xiqu Coal Mine, and analyzing the collected gas, the possible air leakage channel is detected.Some air leakage sources that may cause spontaneous combustion of coal have been investigated.Through the infrared thermal image technology observation to the internal heat source temperature and the surface temperature monitoring and the contrast analysis, can judge the hidden fire source existence, uses the inversion formula to calculate the small coal kiln distance,Finally, the corresponding measures are made for the areas that may cause spontaneous combustion, which provides a reliable basis for further comprehensive fire prevention and fire prevention design in Xiqu Coal Mine.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD752.2

【参考文献】