Study on coal seam stability and environmental treatment technology in Northern Shaanxi Mining Area

In the process of coal mining, it is difficult to mine due to geological factors, and the coal mining has caused pollution to the ecological environment.Therefore, it is proposed to study the coal seam stability and environmental control technology in Northern Shaanxi Mining Area.Taking a coal mine in Yulin City of Northern Shaanxi as the research object, the stability of minable coal seam in this area is evaluated by qualitative evaluation method.In order to improve the objectivity of the evaluation results, the quantitative evaluation method is further used to evaluate the stability of coal seam, and the average thickness, recoverable index, coefficient of variation and variable probability index results of coal seam are calculated, thus the stability evaluation results of coal seam are obtained.Through the analysis and evaluation results, it can be found that coal seam 5 and coal seam 3^-2 belong to the stable coal seams, while the coal seam 4 belongs to relatively stable coal seams, so the mining prospect of this coal mine is good.In view of the water pollution, ecological pollution and solid material pollution in the study area, this paper puts forward some treatment technologies such as sewage treatment, ecological planting and waste rock treatment, and reasonably controls the environmental pollution caused by coal mining in the study area.It is expected to provide some theoretical support for the study of coal seam stability and ecological environment protection in mining area.