Study On Land Use And Landscape Pattern Change In Huolinhenan Open-Pit Coal Mine

Take the Huolinhe south openpit mine as the research area,the four period remote sensing image in the study area of 1986,1996,2008 and 2013 was used as the data source to analysis the land use and landscape pattern change in recent 27 years based on ENVI5.0,ArcGis10.0 and Fragstasts4.0 software platform.Moreover the changes of landscape ecological risk caused by mining was researched.The main conclusions are as follows:1.During the period of 1986-2008,the main land use types in the study area were grassland.After 2008,with the development of mineral resources,the industrial and mining land use instead of grassland became the main type of land use.In the early and late stages of the study,the proportion of grassland was 73.42%and 24.41%,and the proportion of mining land was 21.85%and 72.26%,of which more than 60%of the total land was occupied area in 1986.2.The grassland,forest land showed a decreasing trend.The cultivated land increased and then decreased.The growth of mining land area gradually slowed down.The land use degree was increased,the comprehensive index increased from 246.62 to 345.74.3.Due to the study area is located in the hinterland of the Horqin grassland,the mining land mainly excavated and covered the grassland.Since 1984,the study area has been carried out the mine geological environment management.The reclamation rate is from 1.6%to 0.18%.4.The plate number,fragmentation,diversity 'was increased.The landscape pattern stability decreased.5.The landscape ecological risk was increased,its index from 1.1999 in 1986 to 1.4599 in 2013,but the increase of land reclamation area cut down the increased speed of the ecological risk index.6.In order to realize the rational exploitation and utilization of the land resources in the mining area,it is necessary to control the scale of the industrial and mining land,timely reclamation and strengthen the maintenance of the reclaimed land.