Study On Statistics And Spatial Distribution Of Coal Mine Accidents In China From 2000 To 2020

Coal is the main energy and basic raw material of important industry in China,which plays an important role in the development of national economy.C hina ’s coal mines are dominated by underground workers.Due to the complexity of underground geological conditions,various disasters have continuously challenged China ’s coal mine safety.Based on spatial autocorrelation,gravity center model and fractal theory,this paper focuses on the study of the spatial distribution of coal mine accidents by combining qualitative and quantitative analysis methods.Safety statistical work is the basis of ensuring coal mine safety.It is of great significance to explore the law of accidents to ensure coal mine safety.The main research results are as follows :Through the qualitative statistical analysis of coal mine accidents from 2000 to 2020,it is concluded that the number of coal mine accidents and deaths in the country has declined steadily;the death toll of coal mine accidents in southwest China accounts for 36.36 % of the country.The provinces with more coal production often have a relatively low mortality rate of million tons of coal mines.Roof accident is the disaster with the highest frequency of death.General accidents accounted for 90.9 %;gas accidents occur most frequently in major coal mine accidents.The results show that through the effective implementation of coal mine safety measures in various regions,the coal mine safety situation in China has changed fundamentally.Through the analysis of the migration law of the spatial center of gravity of coal mine accidents by the center of gravity model,it is concluded that there is a spatial positive correlation between coal mine accidents in C hina,but the overall spatial autocorrelation is gradually weakening.The spatial center of gravity of the number of coal mine accidents and the number of deaths has migrated to the northwest by 211.78 km and 129.03 km respectively.At the same time,the spatial center of gravity migration trajectory,direction and distance of coal mine production and GDP are obtained,and the number of deaths is compared with the two.It is concluded that the number of deaths in coal mine accidents is negatively correlated with coal production and GDP.The shift of the spatial center of gravity indicates that the spatial layout of the frequency and degre e of harm of coal mine accidents has changed,indicating that policies and economic development in different periods have a significant impact on the occurrence of regional coal mine accidents.This paper analyzes the fractal characteristics of spatial distribution of major coal mine accidents through fractal theory.Firstly,the latitude and longitude of 587 major coal mine accidents are transformed into plane coordinates and projected on the national map.The fractal dimension value of each region is calc ulated by grid method in Arc GIS.The spatial fractal dimension value of major coal mine accidents in China is 0.6333,and the spatial fractal characteristics are obvious.Considering the natural factors affecting coal mine accidents,analysis on fractal difference of coal mine accidents in different natural areas,the three natural geographical regions and the four dry and wet zones are included in the analysis,and the spatial distribution fractal dimension value and spatial fractal characteristics of each region are obtained respectively.The results show that the spatial distribution fractal of each region exists objectively,which quantifies the spatial distribution characteristics of major coal mine accidents to a certain extent.Statistical analysis of coal mine accidents and exploration of the law of coal mine accidents are helpful to promote the improvement of coal mine safety policies and prevention measures,and to grasp the spatial law of accidents.It has important reference value for mines to ado pt and formulate targeted disaster prevention and control measures.The thesis has 49 figures,17 tables and 84 references.