论文部分内容阅读
根据近年来苏联西部地区矿井发生沼气起火事故的分析得知,摩擦火花是沼气起火主要根源之一,摩擦火花占所有矿井沼气起火的40％以上。 沼气起火可能是由于矿山设备铝合金制成的机体和零件同生锈钢件相互撞击或钻具和设备的部件摩擦坚硬岩石顶面而造成的。 铝及其合金作为材料广泛应用于矿山手电钻及风镐、矿山防爆电气设备壳体零部件及其它部件上,但只有铝合金件同生锈钢表面激烈相撞时才有发生沼气起火的危险,这会导致在相撞处发生有辅加热效应的铝热反应。在相撞外生锈钢表面热度达到500℃以
According to the analysis of the accidents of methane gas incineration in the mines in the western part of the Soviet Union in recent years, friction sparks are one of the main causes of methane gas fires, and the friction sparks account for over 40% of the methane gas fires in all mine shafts. Biogas fire may be caused by the collision between the body and parts made of aluminum alloy of mining equipment and the rusty steel parts or the parts of drilling tools and equipment rubbed against the top of hard rock. Aluminum and its alloys are widely used as materials in mine hand drills and picks, mine explosion-proof electrical equipment parts and other parts of the shell, but only when the aluminum alloy parts collide with the surface of the rusty steel, there is a risk of methane gas fire , Which leads to the thermite reaction with secondary heating effect at the collision. In the collision outside the surface of the steel heat to reach 500 ℃