煤与瓦斯突出报警方法

Alarm methods of coal and gas outburst

分析得出近10年煤矿重特大瓦斯事故起数和死亡人数分别占煤矿重特大事故起数和死亡人数的62.3%和66.5%。提出了用于煤与瓦斯突出报警的甲烷、风速、风向等传感器布置方法。提出了基于煤矿安全监控系统的煤与瓦斯突出报警方法,即监测和分析甲烷浓度、风向、风速、传感器故障等,在出现以下情况时发出声光报警信号,切断煤矿井下全部非本质安全电气设备电源,撤出煤矿井下作业人员:甲烷浓度迅速增高或超过报警浓度,且风速不低于正常值;甲烷浓度迅速增高或超过报警浓度,进风巷风流逆转;进风巷甲烷浓度迅速增高或超过报警浓度等。

Colliery gas accidents in recent 10 years were analyzed,and numbers of accidents and deaths accounted for 62.3% and 66.5% respectively.The placement methods of coal and gas outburst alarm sensors of methane,wind speed,wind direction were put forward.Coal and gas outburst alarm methods were proposed based on coal mine safety monitoring system,namely monitoring and analyzing methane,wind direction,wind speed and sensor fault,specifically,sending out sound and light alarm signal,cutting off all power supply for intrinsically safe electrical equipment in coal mine,and pulling out of coal mine workers in the following cases：wind speed is normal and methane concentration increases rapidly or exceeds alarm concentration;wind direction reverses in intake airway and methane concentration increases rapidly or exceeds alarm concentration;and methane concentrations in intake airway increases quickly or exceeds alarm concentration.