1、翻译部分英文原文The Damage Evaluation of Mining Subsidence of Coal Mining Area Based on Fuzzy Comprehensive Evaluation: A Case Study in YuShenfu Mining AreaShijie SONG, Xiaoguang ZHAOCollege of Geology and EnvironmentXian University of Science and TechnologyXian, ChinakkkbffLingling CHEN, Juan XIECollege of
2、 Geology and EnvironmentXian University of Science and TechnologyXian, ChinazhaoxgAbstract：In this paper, Yushenfu mining area is taken as an example. On the basis of analysis and research of formation mechanism of mining subsidence, using principal component analysis and grey correlation analysis m
3、ethod, factors which affect the damage degree of mining subsidence have been selected. It is determined that disturbance coefficient, the ratio of width to depth, comprehensive hardness of overlying strata, subsidence coefficient and the ratio of mining depth and height are key influencial factors o
4、f damage degree of mining subsidence, and they are taken as evaluation indexes of damage evaluation later. Then, the fuzzy comprehensive evaluation is used to make quantitative evaluation of mining subsidence. The results show that: first, there are 9 mines whose damage degree of mining subsidence r
5、eached HI (serious) among the 12 typical mines of YuShenFu mining area, and the other 3 belong to H (secondary), showing seriousness on the whole. The evaluation results correspond to the conclusion of qualitative judgment and actual situation; second, those mines which show serious mining subsidenc
6、e all display that disturbance coefficient virtually is close to 1, the ratio of depth to thickness is close to or lower than 50, the ratio of width to depth is almost higher than 1, subsidence coefficient lies around 0.7 and the comprehensive hardness of overlying strata is medium hard. These not o
7、nly fully reveals the main damage form of mining subsidence of YuShenFu mining area, that is, discontinuous cutting off type damage, but also truly reflects the coal-mining method (longwall mining), the roof management method (all collapse) as well as the traits of the overburden strata layer of coa
8、l measures. As a result, the consistency of evaluation results and evaluation indexes fully reflect the availability and scientificity of evaluation index system and the accuracy of evaluation method. Keywords-YuShenFu mining area; mining subsidence; fuzzy comprehensive evaluation; damageI. Introduc
9、tionAs a kind of very important energy, coal makes enormous contribution to the economic growth and social progress of our country for a long time. However, with the large scale development of coal resources, mining subsidence caused by coal mining has become one of the most serious damage forms of
10、eco-geological environment. The accurate and convenient measurement and evaluation of the damage degree is the important foundation of the mining subsidence damage prevention and even the repair and rebuilt of the ecologic environment. So taking YuShenFu mining area as an example, on the basis of an
11、alysis and research of formation mechanism of mining subsidence, this study uses various analysis methods to select key factors which affect the damage degree of mining subsidence from the basic factors of geological condition of coal occurrence and design conditions of mining. Then construct evalua
12、tion index system and fuzzy comprehensive evaluation model based on this, and make quantitative evaluation of mining subsidence damage hoping to provide scientific basis for the construction of harmonious, safe and green mining areas.II. The situation of YuShenFu mining areaA. Geological Condition o
13、f Coal Measure StrataThe earths surface of YuShenFu mining area is carpeted with quaternary loess and aeolian sand. Mesozoic stratigraphic exposes in various large valleys. According to the time of formation exposed by exploration, they are classified into Triassic, Jurassic, Cretaceous, Tertiary an
14、d Quaternary formation. The geological structure of this mining area is simple. Its mainly a westering inclined monoclinal structure with a dip of around 1? . The coal seams of this mining area bury shallowly (around 100m in general), the coal seams are thick, the bedrocks are thin and the earths su
15、rface is covered with thick unconsolidated layers. And the two aquifers with significance of water supply that is Qjs and J2Y aquifers are all near the primary mineable coal bed. The distance between the bottom boundary of aquifers and the upper boundary of the uppermost mining coal seam is only 30m
16、-50m.B. Characteristics of Geo-ecological Environment Damage According to incomplete statistics, by 2008, the area of goaf caused by coal mining in the city of Yulin has reached 339.57 km2, which increases by the velocity of 10 km2 per year. And the collapsed area has reached 64.25 km2. Large scale mining subsidence does not only cause and aggravate geological disasters such as collapse, landslide and de
