煤矿风井防爆门设计爆炸载荷计算方法研究  

Research on calculation methods for designed blast load of explosion-proof doors for air shafts of coal mine

作　　者：宋维宾[1,2] 孙玉宁 王永龙[1,2] 王志明 SONG Weibin;SUN Yuning;WANG Yonglong;WANG Zhiming(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo Henan 454003,China;State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization,Jiaozuo Henan 454003,China)

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454003 [2]煤炭安全生产与清洁高效利用省部共建协同创新中心,河南焦作454003

出　　处：《中国安全生产科学技术》2020年第12期72-78,共7页Journal of Safety Science and Technology

基　　金：河南省高等学校重点科研支持计划项目(18A440001)。

摘　　要：为解决煤矿风井防爆门研发中的设计爆炸载荷取值问题,采用理论分析和数值模拟方法,研究MFBL防爆门在被冲击波冲飞过程中的能量转化、传递、耗损关系,以及空气阻力因素的影响;改进拉断钢丝绳消耗能量的算法,着重考虑空气阻力影响因素,重新建立基于事故中防爆门的飞起高度计算防爆门设计爆炸载荷的方法,并以典型案例进行验证。结果表明:防爆门在拉断牵引钢丝绳的过程中,传递给配重的能量相较于拉断钢丝绳所消耗能量较小,可忽略不计;MFBL防爆门的空气阻力系数接近于1,其以较大速度飞行时受空气阻力影响显著,故考虑克服空气阻力作功是必要的;鉴于计算结果,推荐根据20~50 m飞起高度设计防爆门爆炸载荷,并提出根据防爆门飞起高度划分安全防护等级等建议和应用指南,其可提高计算方法的可靠性和可用性,可为防爆门研发等提供参考依据。To solve the valuing problem of designed blast load in the research and development of explosion-proof doors for the air shafts of coal mine,the energy conversion,transmission,and loss relationships of MFBL explosion-proof door during the process of flying away impacted by the shock waves were studied by the theoretical analysis and numerical simulation methods,as well as the influence of air resistance factor.On this basis,the algorithm of energy consumption for breaking the wire rope was improved,then the method of calculating the designed blast load of the explosion-proof door based on the flying height of explosion-proof door in the accident was re-established with emphatically considering the influence factors of air resistance,and a typical calculation example was given.The results showed that the energy transmitted to the counterweight during the process of breaking the traction wire rope of the explosion-proof door was smaller than the energy consumed by breaking the wire rope,which was negligible.The air resistance coefficient of the MFBL explosion-proof door was close to 1,which was significantly affected by the air resistance during the flight with higher speed,so it was necessary to consider overcoming the working of air resistance.According to the calculation results,it was recommended to design the blast load of explosion-proof door according to the flying height of 20~50 m,and the suggestions and application guidelines such as dividing the safety protection levels according to the flying height of explosion-proof door were put forward.The results improved the reliability and usability of the calculation method,and provide important basis for the research and development of explosion-proof doors.

关 键 词：风井 防爆门 爆炸载荷 抗爆性能 能量法 

分 类 号：X936[环境科学与工程—安全科学] TD72[矿业工程—矿井通风与安全]