重庆万盛煤矸石山自燃爆炸型滑坡碎屑流成因探讨

2 0 0 4 - 0 5 - 0 5重庆万盛胡家沟煤矸石山发生滑坡碎屑流灾害。灾害发生时,伴随巨大的响声和刺鼻气味,约2 0×10 4m3 煤矸石碎屑以极高初始速度崩滑而下,滑体横扫运动途中一切障碍,垂直坡降32 0m ,水平运动距离6 0 0m。造成重大人员和财产损失。通过实地考察和实验研究,作者认为煤矸石山中硫铁矿和碳氧化物升温,煤矸石山自燃、内部热量大量积聚所导致的煤矸石山的爆炸,是使大量矸石脱离矸石山形成此次煤矸石高速滑坡碎屑流灾害的主要原因

Cause of Coal Wastes Landslide and Flow of Wansheng, Chongqing

A coal-waste flow occurred on June 5, 2004 in Wansheng, Chongqing. The coal wastes dump unexpectedly exploded with a terrible smell and then rushed down to the foot of hill from the peak along the mountain stream with a high velocity and tremendous voice, demolished fourteen houses. The shock wave swept plants and trees away on both sides of the stream. Finally, wastes rushed into and filled a pound, spattered water on the persons on the opposite side. The event resulted in heavy loss of life and property. The field survey of the coal wastes dump indicates that this hazard was caused by the high-speed landslide and flow due to self-ignition and explosion of the waste. And self-ignition was resulted from the oxidation of pyrite and carbon, spontaneous combustion and then blast. The blast made a mass of coal wastes bursted apart the dump and turn into flow. Then, it is necessary for prevention to remove combustible material from the wastes, change the way of rockfill.