Research on the Risk Evaluation of Mining Land Collapse in Mentougou Region

Abstract

Risk evaluation involves not only the natural characteristic of hazard, but also the socioeconomic properties of the vulnerability. Therefore risk evaluation is a complicated but important scientific problem. According to the analysis of the developed characteristic, forming condition and influent factors of the mining collapse in Mentougou region, Beijing, this paper provides the index system and evaluation methods based on hazard degree and vulnerability degree. And the risk degree is classified to 5 grades. Based on these methods, the land collapse risk in Mentougou region has evaluated, and then the map of the risk grades has drawn. The evaluation result can almost reflect the actual situation and be a foundation of the collapse controlling work in this region. Hazard evaluation method of the mining land collapse Main contents of the risk evaluation is to evaluate the activate degree of land collapse on different goafs. Therefore, the result can reflects the destructive power of the collapse underground[2, 3]. The basic method is to divide the map to many elements firstly. Then the evaluation indexes and weight are determined. After these things, the hazard degree of each element can be calculated. Finally, the hazard zoning can be carried out based on the distribution situation of regional hazard.