The National Geological Survey initiated by the China Geological Survey in 2000 has comprehensively and systematically ascertained the current status of China's mine geological environment, identified major environmental geological problems and potential hazards, and rationally exploited and utilized mineral resources in China. Basic information is provided for the protection and restoration of governance and the transformation of resource-exhausted cities. The survey shows that the cumulative stock of tailings or solid waste in the country is about 22 billion tons, and the mine has caused more than 12,000 geological disasters. The development of mineral resources has seriously affected the geological environment of 88 areas, and the environmental situation of the mine is becoming increasingly severe. According to reports, in the past 10 years, researchers have completed surveys and assessments of mine geological environment in 31 provinces (autonomous regions and municipalities), and conducted remote sensing monitoring of mines in 163 important mining areas. A total of 113,149 mines were investigated to identify various types of illegal mining. At 17972, 2,301 geological disasters of various mines and 67 hidden danger areas of major geological disasters, the national mine remote sensing monitoring system was constructed, and the mine geological environment information system was developed, which provided a new means for mine order supervision and law enforcement. Resource management provides technical support. The project evaluated the national mine geological environment and the status of the mine geological environment in China's major mining cities, analyzed and predicted the development trend of the national mine geological environment, and completed the national mine geological environment protection and governance division. According to the survey, as of the end of 2005, the total number of geological disasters caused by mines in the country exceeded 12,000, resulting in direct economic losses of 16.16 billion yuan; the land area occupied by mining activities was about 1,438,900 hectares; the area of ​​mined areas formed by mining was about 890,600. On the hectare, the ground collapse (sink) area was 352,200 hectares. The average annual amount of wastewater and waste generated by mining activities is about 6.089 billion tons, and the emissions are about 4.79 billion tons. The average annual output of tailings or solid waste generated by mining activities is about 1.673 billion tons, and the emissions are about 1.454 billion tons. The cumulative stock of tailings or solid waste in the country is about 21.962 billion tons. There are hundreds of mining cities in China that are born from mines. According to the survey, there are 88 areas with serious impacts on the geological environment of the mining area, covering an area of ​​53,000 square kilometers. There are 317 areas with serious impact, with an area of ​​about 384,000 square kilometers, and 610 areas with slight pollution. 3.81 million square kilometers. There are 231 mining cities that have a certain impact on the surrounding geological environment, including 30 mining cities that have been seriously affected, 101 mining cities that have a serious impact, and 100 mining cities that have a slight impact. Shanxi, Shaanxi and Inner Mongolia completed the project in northern Shaanxi coal resource development, Inner Mongolia, Shanxi, Shaanxi Dongsheng - China's major mineral resources Jungar energy base, Liaoning Fuxin coal mining area, Jilin Liaoyuan coal mining area, Shaanxi Tongguan gold mining area geological zone focus Detailed investigation of environmental issues, dynamic analysis of geological environment changes in typical mining areas such as the non-ferrous metal and coal mining areas in southeastern Hunan, the Jiaodong Peninsula gold mining area, and the Tangshan coal mining area in eastern Jiangxi, and the geological environment of some key mining areas were identified, and analyzed and evaluated. The types, scales, hazard levels, influencing factors and development and evolution trends of the main geological environmental problems caused, induced and exacerbated by mining activities, and suggestions for comprehensive improvement measures of geological environment in mining areas are proposed. Refrigerated Truck are ideal choose for keep flowers, dairy, seafood, meat, fruit and ice cream cold during transport. refrigerated truck also known as freezer truck, refeer Van Truck, cooling truck. our factory produce refrigerated van truck, semi-trailer and mobile cold room for sale, the quality meet ISO9001:2015 standards, our refrigerated van truck are very welcomed in China domestic market, and we export many to overseas nowadays.if you are looking for a new freezer lorry truck, please don't hesitate to contact us, you will get the very best price from a high quality freezer truck manufacturer directly. 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