煤矿瓦斯爆炸事故数值模拟分析

对某煤矿瓦斯爆炸事故现场破坏情况和有关资料进行了分析,利用AutoReaGas计算软件对爆炸过程进行数值模拟,得出瓦斯爆炸过程中流场各参数的变化规律,探讨了事故发生的原因及发展过程,并与事故现场所搜集的爆炸参数相比较,为事故调查研究提供了科学的依据。     

巷道瓦斯爆炸的计算机模拟研究

基于AutoReaGaS软件中所给出的均相湍流时均方程组和κ-ε湍流模型等,用计算机对瓦斯爆炸过程进行数值模拟,揭示了煤巷内瓦斯爆燃、爆轰的发生、发展和演化过程、火焰加速机理和燃烧加速过程中流场各参数的变化规律等。     

煤矿巷道内CO抑制瓦斯爆炸的反应动力学模拟研究

为研究矿井瓦斯中含有的一氧化碳对瓦斯爆炸的影响,通过运用化学动力学计算软件CHEMKIN3.7中PREMIX程序包,并采用了详细反应机理(包括53种组分、325个反应),建立了巷道内瓦斯爆炸的计算模型.利用此模型对瓦斯爆炸过程中反应物浓度、部分致灾性气体浓度的变化趋势进行了详细分析.通过对瓦斯爆炸详细反应机理的敏感性分析,找出了影响瓦斯爆炸以及爆炸后部分致灾性气体生成的关键反应步.同时,对一氧化碳抑制瓦斯爆炸及爆炸后致灾性气体生成的机理进行了探讨.     

煤矿瓦斯爆炸防治技术研究

文章通过分析煤矿发生瓦斯爆炸灾害事故的原因及特点,介绍了预防和控制瓦斯爆炸灾害事故的技术措施及发展趋势,说明瓦斯爆炸事故的防治是煤矿安全工作的一项系统工程,必须放在安全工作的首位,才能使瓦斯爆炸事故及其他灾害事故大幅度减少。     

煤矿瓦斯煤尘爆炸的动力学特性研究进展

随着煤炭科技的不断发展,瓦斯煤尘爆炸灾害已成为制约煤炭高效智能化开采的重要因素,严重威胁煤矿的安全生产过程。为了明确瓦斯煤尘爆炸的最新研究进展,为煤矿智能化发展提供有力的安全保障,通过文献研究,从3个方面综合论述了近些年国内外对瓦斯煤尘爆炸的动力学特性研究现状及发展趋势。一是瓦斯煤尘爆炸火焰生成机理研究。二是瓦斯煤尘爆炸火焰演化规律研究。三是瓦斯煤尘爆炸传播关键表征技术。后续研究过程中,应继续深入开展瓦斯爆炸对沉积煤尘诱导机制的研究工作,分析瓦斯爆炸冲击波的扬尘机理以及压力波和火焰作用下的煤尘粒子运动并参与反应的过程,探明不同瓦斯爆炸强度条件下的扬尘区域及煤尘参与爆炸的范围,并建立高精度瓦斯煤尘爆炸反演模型,实现瓦斯煤尘爆炸灾害的有效控制。     

试论煤矿瓦斯爆炸成因及防治

在煤炭开采过程中,绝大多数的特大事故是由于瓦斯爆炸引起的。本文对煤矿瓦斯爆炸事故发生的原因进行了分析,探讨了防止瓦斯爆炸事故发生的预防措施。     

浅析煤矿瓦斯爆炸成因及防治

在煤炭开采过程中,绝大多数的特大事故是由于瓦斯爆炸引起的。本文对煤矿瓦斯爆炸事故发生的原因进行了分析,探讨了防止瓦斯爆炸事故发生的预防措施。     

浅析煤矿瓦斯爆炸成因及防治

在煤炭开采过程中,绝大多数的特大事故是由于瓦斯爆炸引起的。本文对煤矿瓦斯爆炸事故发生的原因进行了分析,探讨了防止瓦斯爆炸事故发生的预防措施。     

煤矿瓦斯爆炸事故防治对策的研究

瓦斯爆炸是煤矿生产中最严重的灾害之一。瓦斯爆炸事故起数和死亡人数较高,已经成为我国煤矿安全的"第一杀手"。本文探讨了瓦斯爆炸的危害及爆炸条件、主要影响因素,在分析事故主要原因的基础上,提出了煤矿瓦斯爆炸事故防治对策方法和措施。     

浅析煤矿瓦斯爆炸原因与防治

概况煤矿发生瓦斯爆炸灾害事故的原因及特点着手,介绍了预防和控制瓦斯爆炸灾害事故的技术措施及发展趋势,说明瓦斯爆炸事故的防治是煤矿安全工作的一项系统工程,必须放在安全工作的首位,才能使瓦斯爆炸事故及其他灾害事故大幅度减少。     

煤尘爆炸事故及其综合评判

煤矿的安全管理是一个复杂的系统工程,其影响因素很多,为了有效地控制危险因素,必须进行综合评判.文章在介绍煤尘爆炸的危害,分析煤尘产生的原因和特征后,运用模糊数学理论对煤尘爆炸事故进行了模糊综合评判.     

Failure Modes and Manifestations in a Mine Gas Explosion Disaster

In 2009, a serious gas explosion happened in Tunlan coal mine at Shanxi province, P.R. China, which claimed the lives of 78 miners. One hundred and fourteen miners got injured, and nearly 4 million dollars of economic loss was reported. On the surface of it, it seems to be an independent happened accident. However, the formation of a gas explosion is dependent on various conditions and all these conditions must be met at the same time so as to result in such explosion. Hence, the explosion itself is not a single event in time. With considering the gas explosion causing the mine ventilation system failure, there must be a number of related causations existing in the system which play important roles that contribute to the system failure. In other words, explosion can be considered as an evolution resulting from various related other failures in the system. Hence, in this paper, failure modes and their contributions to the explosion are going to be investigated. Based on the requirements of an explosion and its propagation characteristics in the underground roadway network, this paper summarizes all failure modes in the gas explosion accident through the initial formation of explosion to its post effects. Moreover, using the theoretical approach and simulation method, the corresponding contributions are also interpreted. The research efforts show that (1) it should not simply treat the explosion as an independent event. Various linked failure modes can be observed during the analysis. It is a quite interesting and also needed for mining engineers to well understand their formations and effects on the system, which may greatly improve the system design in the future to avoid such accidents and (2) the domino effect is involved in various failure modes. It also provides a solution to stop the accident’s propagation by breaking any chain reactions. The research results presented in this paper can be used as theoretical guidelines for improving the safety considerations of a mine ventilation system design work in the future practices.     

爆破作业引起井下瓦斯爆炸事故原因及预防措施

文章根据大量的现场调查资料，分析了煤矿井下因爆破作业引起瓦斯爆炸事故的原因，指出炮泥封堵长度不足，爆破电源火花，巷道贯通爆破措施不利，裸露爆破，炸药爆燃和分次爆破是瓦斯爆炸的主要原因。     

Research on the Distribution of Unconfined Gas Cloud Explosion Field

Journal of Failure Analysis and Prevention - To research the distribution of unconfined gas cloud explosion overpressure field and impulse field, build domed finite element model of combustible...     

煤矿井下爆破作业频带能量分布规律

为了有效降低煤矿井下爆破作业扰动,减少爆破诱发的矿震和煤与瓦斯突出等次生灾害,需要对煤矿井下爆破作业能量变化规律进行研究。采用锚杆外挂式方法安装传感器,优化了微震监测系统安装方法。对煤矿井下爆破作业过程的微震信号进行采集,并应用小波包分解方法分析其频谱,发现煤矿井下爆破作业信号的能量频带分布范围广,各个频带内爆破微震信号的能量百分比不断变化。爆破微震信号92%以上的能量集中在0~500 Hz的低频带范围内。随传播距离的增加,微震信号的高频部分衰减速度快。在煤矿现场应用低爆速、低密度、小直径的炸药,降低最大一段的炸药药量,采用分散布药与不耦合装药方式有利于降低地震效应。     

基于ZigBee技术的煤矿瓦斯监测系统

本文提出了一种超低功耗的无线传感器网络节点与利用CAN总线连接的固定节点相结合的煤矿瓦斯监测系统方案.该方案采用ZigBee无线通信技术构建无线传感器网络,并能对瓦斯涌出的动态变化特性进行分析,实现对瓦斯浓度全方位、实时监测和智能预警,以大大降低煤矿生产安全隐患.     

Analyses of Cascading Failure in Mine Ventilation System and Its Effects in a Serious Mine Gas Explosion Disaster

In 2009, a serious gas explosion happened in Tunlan coal mine at Shanxi province, P.R. China, which claimed the lives of 78 miners. 114 miners got injured, and nearly 4 million dollars of economic loss was reported. According to the investigation report, the mine gas explosion was originally from a buildup of gas catching a flame in the underground. The happening of such accumulation was actually caused by functional failures of the mine ventilation system so that the concentration of gas reached the lower flammable limit. Technically speaking, the mine ventilation system is an integrity system. Any unit’s failure can lead to other units losing their normal functions until the whole system breaks down. In other words, a cascading failure may happen. Based on the Tunlan mine disaster, this article introduces the concepts of cascading failure in the subject of mine ventilation engineering, which include the development process of failure, the mechanism, and the corresponding failure criteria, etc. The software “VentGIS simulator” is used as a tool to investigate the failure that occurred and its effects in the mine ventilation system. The coupled relationships between the failure mechanism and the gas explosion and its propagation are quantitatively studied in-depth. The research efforts show that (1) unreasonably installed the ventilation regulators directly caused the buildup of mine gas, which means an initial failure in a local ventilation system had appeared. Thus, one requirement of the gas explosion was provided; (2) failures of the early-warning system and mitigation measures led to the propagation of gas explosion shock in the underground mine network. Hence, impacts by the explosion are greatly enhanced. The research results presented in this article can be used as theoretical guidelines for improving the safety of a mine ventilation system or assisting to design a new one in the future.     

受限空间内瓦斯爆炸障碍物附近流场结构演化实验研究

为研究受限空间内瓦斯爆炸障碍物附近流场结构演化,通过实验室中尺度激波管道设置压力和火焰传感器以及激光纹影系统,在玻璃视窗处设置阻塞率为21.56％的障碍物,改变障碍物数量,对比不同工况下火焰传播、压力变化、激波运动、流场变化,分析障碍物对受限空间内瓦斯爆炸流场演化影响.实验研究发现:障碍物对于瓦斯爆炸激励效应不可忽视,...     

爆破法在煤气管式冷却器胀管施工中的应用

传统的胀管工作借助于胀管器来完成，工作条件差、劳动强度大、效率低。爆破法完全可以在胀管施工中的应用，只是对不同的胀接对象必须科学地作出必要的设计及试验，制定出严格的操作规程和安全措施。文章以煤气初冷器的胀接为例介绍爆破胀接法。