新的安全采煤法探讨  

Discussion on new safety coal mining method

作　　者：王宝兴[1] 经建生[1] 李晨[1] 

机构地区：[1]公安部天津消防研究所,天津300381

出　　处：《消防科学与技术》2015年第3期405-407,共3页Fire Science and Technology

摘　　要：煤与瓦斯突出是煤层中的瓦斯气处于高压(地下3 000m处可高达30 MPa)造成的。采煤应先用爆破法将预采煤段的瓦斯气压力降到0.1 MPa(大气压力),即预先将该煤段中的瓦斯气释放出来;利用瓦斯气比空气轻(相对空气的比重为0.6),在空气中受浮力会自动流出井外的特性,达到实际采煤时,瓦斯相对涌出量小于0.4 m3/t,只需极小的通风量。有火源也不会爆炸。Coal and gas outburst is induced by high pressure gas in in coal seam, which could reach up to 30 MPa underground 3000 m. using blasting method,pressure of pre mining section gas could be reduced to 0. 1 MPa before coal mining, released gas and it would flow out of the well as its density is smaller than air（relative density is 0.6）. When mining the coal, the rela- tive gas emission would be lower than 0.4 m3/t,minimal venti- lation quantity was required and explosion would not happen e- ven if fire origin existed.

关 键 词：矿井 安全采煤法 瓦斯 爆炸浓度 通风 

分 类 号：X921[环境科学与工程—安全科学] TD712.7[矿业工程—矿井通风与安全]