Geological environment problems and harmfulness prediction of mines in Hua'an Coal Industry,Henan Province
The mining area is a monoclene structure,mainly mining the coal bearing strata of Shanxi Formation and Taiyuan Formation.Due to the influence of the goaf,many geological environment problems have been caused,such as the development of invisible subsid-ence columns,which may lead to ground collapse and threaten the availability of surface buildings and land resources.With the mining year by year,the harm caused by geological environment problems will also increase year by year.According to the geological environ-ment problems,the probability integral method was used to infer the surface movement and deformation of the mining area and the change of groundwater,etc.,and the development process and harm of the mining of underground coal seam on the geological environ-ment problems of the mine were analyzed.After the end of mining,the ground collapse area was 34.926 6 km2,causing serious impact and greater risk.The communication range of water conducted zone in each working face after coal mining was 17 m outside the goaf on average,and the distribution range of falling funnel was 784 m outside the goaf,resulting in the drop of water level of the main aquifer in the region and serious impact on the aquifer.Ground collapse caused by mining had a serious impact on landform landscape.
万方数据
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