| On the basis of full collecting of the study area and its surrounding of regional geology,field geology,hydrogeology,engineering geology,environmental geology and meteorology,geography and economic data,the basic survey data about the geological disasters,aquifer destruction,destruction of land resources and landform landscape destruction caused by coal mining,have been obtained through field reconnaissance,it provides the basis for research and analysis in the area of mine geological environment problems.Firstly,the mine current situation of the geological environment has been investigated and then grasped the geological environment of the mining area in the mine area.Secondly,according to the existing types of mine geological environment problems and influence factors are complicated reasons,on the evaluation method of the rough set theory of mathematics model,the coal mine geological environment problems and the influencing factors have been analysed deeply.Finally,based on the Rough sets theory evaluation model,the comprehensive evaluation and zoning of the mine geological environment in the study area were carried out.The main conclusions of this thesis are as follows:(1)Based on the field investigation,it has been found that the main mine geological environment problems due to coal mining at present are ground collapse,associated ground cracks and other geological disasters,groundwater and surface water pollution and destruction,land resources occupation destruction and the impact and damage of the topography landscape.(2)According to the main geological environment problem existing in the study area,combined with previous research results,a comprehensive evaluation index system of the mine geological environment has been established from ten indexes baesd on four side,geological disasters,water resources influence and damage,topography influence and destruction,land resources occupation destruction.(3)Rough sets theory has been adopted in this paper,the evaluation model has been constructed and the weight coefficient of evaluation index has been determined.The results showed that after the reduction theory of evaluation index to the greatest extent ensures the complete evaluation factors set,fully and truly reflect the actual situation of the mine geological environment,the evaluation result is objective and reliable.(4)According to the evaluation results,combining with the actual situation of the study area,mine geological environment in the study area has been evaluated and zoned comprehensively.The serious area is about 22.31km2,accounting for 48.96% of the assessment area;the serious area is about 23.25km2,accounting for 51.04% of the whole assessment area. |
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