采空区注氮惰化抑爆技术研究
发布时间：2018-07-21 19:48
【摘要】：采空区注氮惰化抑爆技术在自然发火煤层当中应用比较广泛,但针对具体条件下半封闭采空区的应用仍然存在一些关键技术需要解决,例如注氮半径、注氮方式等,本文根据宏岩煤业采空区“三带”分布规律的基础上,提出了宏岩煤矿的注氮惰化参数,达到了采空区抑爆的目的。 本文针对宏岩煤业公司矿井回采工作面在回采过程中,采空区冒落岩石相互撞击摩擦产生的高温热表面和火花,导致井下火源产生,通过采空区瓦斯爆炸防治方案优选,结合宏岩煤业公司的开采技术条件,综合分析多种治理采空区内因灾害的方法,最后采用注氮的方法惰化采空区气体,并根据束管监测结果在4405工作面进行了注氮设计并实施,保证了回采工作面的安全回采。 根据4405工作面瓦斯涌出规律及分布状况,通过束管采样监测与注氮工艺的设计、优化、实施,以及束管监测结果的分析和以往经验的总结,确定·4405工作面注氮半径定为20m,注氮量为4000m3,注氮时间为5.5小时,注氮方式采用间歇性注氮,加强日常的管理,引入注氮防灾的长效机制。经过注氮方案的初设和优化,在采空区实施注氮防灾过程中,起到了稀释和惰化灾害性气体的作用,使瓦斯致灾区转型成为安全区,原来的瓦斯爆炸区瓦斯浓度下降到5%以下,注氮效果达到了惰化抑爆的目标,确保了采空区及工作面的安全。
[Abstract]:The technology of nitrogen injection inerting blasting suppression in goaf is widely used in spontaneous combustion coal seam, but there are still some key technologies to be solved for the application of semi-closed goaf under specific conditions, such as nitrogen injection radius, nitrogen injection mode and so on. Based on the distribution law of "three zones" in the goaf of Hongyan coal industry, this paper puts forward the parameters of nitrogen injection inerting in Hongyan coal mine, which achieves the purpose of blasting suppression in goaf. This paper aims at the high temperature hot surface and spark produced by the caving rock collision friction in the mining face of Hongyan Coal Industry Company, which leads to the underground fire source, and through the gas explosion prevention scheme in the goaf, the optimal selection is made. Combined with the mining technical conditions of Hongyan Coal Industry Company, this paper comprehensively analyzes several methods of controlling the internal disasters in goaf, and finally adopts the method of nitrogen injection to inert the gas in goaf, and designs and implements nitrogen injection in 4405 face according to the monitoring results of beam tube. The safety of mining face is ensured. According to the law and distribution of gas emission in 4405 working face, through the design, optimization, implementation, analysis of monitoring results and summary of previous experience of sampling and monitoring of beam tube and nitrogen injection process, It is determined that the radius of nitrogen injection is 20m, the quantity of nitrogen injection is 4000m ~ 3, the time of nitrogen injection is 5.5h, the mode of nitrogen injection is intermittent nitrogen injection, the daily management is strengthened, and the long-term mechanism of nitrogen injection prevention is introduced. After the initial design and optimization of the nitrogen injection scheme, in the process of nitrogen injection and disaster prevention in the goaf, it played the role of diluting and inerting the disastrous gas, making the gas-induced disaster area turn into a safe area, and the gas concentration in the original gas explosion area decreased to less than 5%. The effect of nitrogen injection has achieved the goal of inerting explosion suppression and ensured the safety of goaf and working face.
【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】：TD712.7
本文编号：2136670
[Abstract]:The technology of nitrogen injection inerting blasting suppression in goaf is widely used in spontaneous combustion coal seam, but there are still some key technologies to be solved for the application of semi-closed goaf under specific conditions, such as nitrogen injection radius, nitrogen injection mode and so on. Based on the distribution law of "three zones" in the goaf of Hongyan coal industry, this paper puts forward the parameters of nitrogen injection inerting in Hongyan coal mine, which achieves the purpose of blasting suppression in goaf. This paper aims at the high temperature hot surface and spark produced by the caving rock collision friction in the mining face of Hongyan Coal Industry Company, which leads to the underground fire source, and through the gas explosion prevention scheme in the goaf, the optimal selection is made. Combined with the mining technical conditions of Hongyan Coal Industry Company, this paper comprehensively analyzes several methods of controlling the internal disasters in goaf, and finally adopts the method of nitrogen injection to inert the gas in goaf, and designs and implements nitrogen injection in 4405 face according to the monitoring results of beam tube. The safety of mining face is ensured. According to the law and distribution of gas emission in 4405 working face, through the design, optimization, implementation, analysis of monitoring results and summary of previous experience of sampling and monitoring of beam tube and nitrogen injection process, It is determined that the radius of nitrogen injection is 20m, the quantity of nitrogen injection is 4000m ~ 3, the time of nitrogen injection is 5.5h, the mode of nitrogen injection is intermittent nitrogen injection, the daily management is strengthened, and the long-term mechanism of nitrogen injection prevention is introduced. After the initial design and optimization of the nitrogen injection scheme, in the process of nitrogen injection and disaster prevention in the goaf, it played the role of diluting and inerting the disastrous gas, making the gas-induced disaster area turn into a safe area, and the gas concentration in the original gas explosion area decreased to less than 5%. The effect of nitrogen injection has achieved the goal of inerting explosion suppression and ensured the safety of goaf and working face.
【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】：TD712.7
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