一、概况 义马煤田煤系地层属下侏罗纪;煤种为长焰煤;煤层极易自燃;低沼气;有煤尘爆炸危险。随着普采、综采的广泛使用,机械化程度不断提高,煤田开发强度高,开采深度和采空范围逐渐扩大,矿井通风负压增加,因此,回采工作面特别是综采面自然发火逐年上升。 我局现有9套综采设备生产,几年来多数都因受内因火灾威胁,被迫停产、搬家换面等,由此带来很大的经济损失。83年全局有7套综采面生产,因发火封闭了三个综采面,其中:杨村矿1203和1216采面,千秋矿18061综采面,共封闭液压支架257架,折人民币822.4万元;另有运输机、供电等设备也被封在里面;同时,为灭火开凿的巷道,使用的灭火器材、机械等;启封后液压支架拆除、设备大修,也费不少人 First, the general situation Yima Coalfield strata under the Jurassic; coal species are long flame coal; coal seam easily spontaneous combustion; low biogas; coal dust explosion risk. With the extensive use of general mining and fully mechanized mining, the degree of mechanization is increasing, the strength of coalfield development is high, the depth of mining and goaf is gradually expanded, and the negative pressure of mine ventilation is increased. Therefore, the spontaneous combustion of mining face, especially fully mechanized coal mining face, increases year by year . Our existing 9 sets of fully mechanized mining equipment production, the majority of years due to internal threat of fire, forced to stop production, moving face to face, etc., resulting in great economic losses. In 1983, there were 7 sets of fully mechanized coal mining facilities in the world. Three fully mechanized coal mining faces were closed for firing, of which 1203 and 1216 face of Yangcun Mine and 18061 fully mechanized mining face of Qianqiu Mine were closed. 257 hydraulic supports were closed, with a total amount of 8.222 million Yuan; another transport aircraft, power supply and other equipment have also been sealed inside; the same time, fire-fighting tunnels, the use of fire-fighting equipment, machinery, etc .; unsealed hydraulic support dismantling, equipment overhaul, but also a lot of people