乌鲁木齐大泉湖煤田自燃特征及环境影响

Spontaneous combustion Characteristics and environmental effects of DaQuanHu coalfield in Urumqi

乌鲁木齐大泉湖煤田构造基本为一北倾的单斜,地表缓,深部变陡,含煤地层为中侏罗统西山窑组下段。干旱的自然环境、煤质、埋藏浅、老窑、构造导致煤层自燃,自燃产物包括残留煤、煤灰、烧变岩,剖面上具有明显的分带规律。气体中未监测有毒物质,受自燃污染的地下水主要以蒸发形式散失,残余部分赋存在烧空区。

Urumqi DaQuanHu coalfield is basically monocline structure dipping the North , which is surface corrosion, steepening in the deep, coal bearing strata is the lower section of Middle Jurassic Xishanyao Formation, the droughty natural environment, coal quality, buried shallow, old coal mine, construction led to the coal spontaneous combustion ,the spontaneous combustion outcome includ residual coal, ash, burnt rock section, has obvious zonation in section. No toxic substances in gas, the contaminated groundwater mainly loss in the form of evaporation, the residual part exists in burning empty area.