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China University of Mining and Technology (2020)

Study on Landscape Pattern Optimization of Large-scale Surface Coal Base in Semi-arid Steppe Based on 3S Integrated Technology

吴振华

Titre : Study on Landscape Pattern Optimization of Large-scale Surface Coal Base in Semi-arid Steppe Based on 3S Integrated Technology

Auteur : 吴振华;

Grade : Doctoral Dissertation 2020

Université : China University of Mining and Technology

Résumé partiel
Human beings have thousands years of civilization history of coal mining and utilization.The important position of coal in energy utilization has been unshakable in China and even the world.The coal resources in eastern China are gradually exhausted.In order to further meet the demand of China’s energy,during the“12th Five Year Plan”and“13th Five Year Plan”,the Chinese government proposed to speed up the strategic shift of coal development to the west,and focus on the construction of nine large-scale coal bases in Northwest China,and accelerate the closure and exit of coal mines outside the large-scale coal bases.The semi-arid steppe in Northwest China has the characteristics of cold,drought,poor soil,high evaporation intensity and short plant growth period.The grassland ecological background conditions are extremely fragile,and it is a region with extremely serious landscape ecological degradation.Most of China’s surface coal mines are located in arid and semi-arid regions.The exploitation of coal leads to a series of landscape ecological disturbance and ecological environment problems,such as landscape structure defect and dysfunction.Therefore,it is very necessary to optimize the landscape pattern effectively,which includes realizing the maximum overall recovery with the minimum manual intervention,comprehensively understanding the landscape ecological problems and the complexity of the impact of mining on the landscape ecology.However,the impact of surface coal mining on the landscape pattern of semi-arid steppe is not clear,which leads to the existing landscape pattern optimization methods that cannot be targeted and scientific to solve the landscape ecological problems of large-scale surface coal bases in semi-arid steppe.The objectives of this study are:1.study on the theory and method of landscape pattern optimization based on guided self-restoration ;2.put forward the landscape classification system of large-scale coal bases in semi-arid steppe ;3.carry out full landscape ecological investigation in the study area ;4.define the connotation,standard,assessment index system and model of landscape ecological health for large-scale coal base in semi-arid steppe ;5.in-depth study on the impact of surface coal mining on grassland landscape pattern ;6.determine the landscape pattern optimization plan of large-scale coal base in semi-arid steppe.Finally,the following research results are obtained :(1)Based on the principle of landscape classification of large-scale coal bases,this study fully considers the ecological attributes of land on the basis of genetic land classification,integrates the pattern,process and function theory of landscape ecology,and adopts the top-down decomposition classification method,draws lessons from the hierarchical nomenclature of biological classification,and finally constructs the landscape classification system of large-scale coal bases in semi-arid steppe,which includes 4 categories of landscape community,16 categories of landscape class,62categories of landscape family,and more than 200 categories of landscape species.Moreover,on the basis of landscape classification and investigation,this study conducts an in-depth analysis on the landscape pattern evolution of Shengli large-scale surface coal base in Xilinhot City from 2002 to 2017.

Mots clés : 3S Integrated Technology; Large-scale Surface Coal Base; Impact of Mining on Landscape Pattern; Guided Self-restoration of Mining Area; Landscape Pattern Optimization of Mining Area;

Présentation (CNKI)

Page publiée le 3 juin 2021