Study On Different Time Reclamation Strategy Of Mine Coal Mine Based On 3S Technology

Yueshengshan coal mine is located in Zezhou,Jincheng,Shanxi,with an annual production capacity of 450 thousand T.The coal mine began mining coal seam No.9 and No.15 in 2012,coal mining is divided into 3 stages,the region is expected to be completed after a total of about 16.5 years.Zezhou coal mine is located in the Jincheng River Basin,the basin involved a total of 11 coal mines.Through the exploitation of coal resources in the basin,the economic benefits of Zezhou county are greatly improved.But the large area,high intensity of coal mining activities,is expected to also lead to serious environmental problems:Surface subsidence,vegetation destruction and groundwater pollution.The emergence of environmental problems has seriously affected and restricted the development of the regional economy,but also brought great inconvenience to people's lives and normal production activities.The key to solve this problem is land reclamation,and the suitability of land reclamation is the foundation of this work.This thesis,taking yueshengshan caol mine of Jincheng as research scope,the land reclamation correlation theory and land quality evaluation theory as the theoretical basis,using ENVI,MSPS and ArcGIS technology,adopting analytic hierarchy process(AHP)and weighted index method,studies the subsidence prediction,the subsidence visualization,the land suitability and the reclamation strategy of the coal mining under different mining conditions.The results are as followings:1.This thesis adopts the probability integral method as mining subsidence prediction method and the data processing of the surface subsidence prediction parameters by using MSPS software to get the horizontal deformation contour map,horizontal moving contour map,tilt contour map,curvature contour map and settlement.In accordance with the rules of the below 10 mm as the surface moving boundary,and the delineation of the study area of the coal mine,the total study area is 357.77hm2.2.This thesis,using the ENVI software to carry on the geometry correction,the image cutting,the surveillance classification,the classification post-processing and the precision appraisal of the SPOT image data,has drawn out land use present situation data of the study area.The current land types in the study area are divided into five categories,including cultivated land of 272.78 hm2,forest area of 5.39 hm2,grassland 25.77hm2,water and water conservancy facilities land of 1.54 hn2,urban village and industrial land for 52.30 hm2.3.This thesis studies subsidence prediction in the study area by using MSPS software.Combined the subsidence isoline,horizontal deformation,curvature and coal seam tilt data with 3d visualization function and spatial analysis function of ArcGIS,this thesis shows the three-dimensional visualization of surface subsidence,and obtains the land damage prediction and damage degree information of different mining time series in the study area.? The land damage area in the first stage,second stage and third stage is 139.90 hm2,189.47 hm2 and 303.93 hm2 respectively.From the second stage to the third stage,the land damage growth area accounted for 70%of the total area,which demonstrates the land destruction in the third stage is the most serious.?From the three mining stages,the area ratio of mild,moderate and severe damage to each stage is close to 84:15:1,which explains that the damage caused by the coal mining,the mining sequence,the mining area has less effect or no effect on the proportion of different damage degree of land.4.This thesis is based on elevation,slope,distance from the waters,predicting the collapse damage degree,distance to roads,rainfall and soil fertility of the 7 indicators of collation and analysis,takes into the relevant industry standards,especially for the three indicators of elevation,rainfall and soil fertility,and adopts the method of statistical analysis to further determine the grading standards of these three factors,and ultimately determine the appropriate classification standard of reclamation evaluation factor.5.The study of the suitability of land reclamation in the study area shows that the quality of land is lower because of the mining of different time series coal resources.The main performance is:during the coal mining from the first stage to the third stage,the quality proportion of 3%of the first class cultivated land is converted into the second or the third,about 21.64 hm2;the first class forest accounted for 27%into the second or the third,about 1.46 hm2;the first class grassland accounted for 10.9%into the second or the third,about 3.79 hm2.6.Different coal mining stages have different reclamation strategies.The first stage mainly uses artificial treatment,which aims to fill the small cracks in the initial surface;With the increase depth of coal seam mining and mining range,the second stage mainly combines the artificial and mechanical treatment,aiming to fill the peace of the surface destruction;In the third stage,the coal mining time,coal and mining range reach the maximum,.Besides the combination of the artificial and mechanical treatment,a certain biological measures is necessary to improve the fertility and status of the soil.Different reclamation strategies can effectively guarantee and improve agricultural production,create and improve the good ecological environment,and bring great economic and social benefits.