# Cause Analysis of Coal Mine Gas Accidents in China Based on Association Rules
## 1 Introduction  
A comparative analysis of the fatality rate per million tons of various coal mine accidents in China shows that coal mine gas accidents often cause large economic losses and casualties [1, 2] In recent years, although coal mine safety production technology has made great progress, the issue of how to prevent the occurrence of coal mine gas accidents is still an important subject of the current research. A large number of historical accident statistics can better reflect the mechanisms of and reasons for the accident. [PERSON] et al. [3] sorted out nearly 170 gas explosion accidents in China and nearly 50 gas explosion accidents abroad, analyzed the accidents from the three aspects of accident location, occurrence time, and types of ignition sources, and obtained ten types of ignition sources that are most likely to cause accidents. [PERSON] et al. [3] analyzed the tremendous and devastating coal mine gas explosion accidents from 1981 to 2010 from the three dimensions of accident occurrence time, prone provinces, and accident types based on accident statistical analysis and the Granger causality test. [PERSON] et al. [4] analyzed 377 tremendous and devastating accidents which occurred in China's coal mines from 2002 to 2011 based on accident inducements, and concluded that more than 90% of these accidents were caused by unsafe behaviors of personnel. [PERSON] et al. [5] obtained the potential relationship between accident causes of different types of marine ship accidents based on the MDTC model through statistical analysis. [PERSON] et al. [6] analyzed the data of coal mine gas accidents inChina from 2006 to 2010, and found that the number of accidents and deaths in low-gas mines were more than those in high-gas mines, and the occurrence time of coal mine gas accidents presented exponential distribution. [PERSON] et al. [7] analyzed serious coal mine gas explosion accidents in China from 1950 to 2015 by using statistical methods, and found that improper ventilation management was the most common cause of gas accumulation. Some progress has also been made in the analysis of the cause of accidents from a large number of historical accident statistics. [PERSON] et al. [8] proposed the causality model of railway accidents by analyzing the investigation report of railway accidents. [PERSON] et al. [9] proposed a new systematic research method to analyze the causes of construction accidents and put forward corresponding countermeasures. [PERSON] et al. [10] developed an EEA event assessment method to assess the safety level of coal production by studying coal mine death accidents in India in the past 100 years. [PERSON] [11] studied and constructed a causal model between life events and human errors of coal miners by using the structural equation method. [PERSON] et al. [12] analyzed the causes of coal mine accidents in recent years and found that most coal mine gas explosion accidents occurred in low-gas mines. [PERSON] et al. [13] used the statistical data of 362 major coal mine accidents in China from 2000 to 2016 to establish the Chinese Coal Mine Human Factor Analysis and Classification System (HFACS-CM), and conducted qualitative and quantitative analysis on the causes of accidents. However, when determining the cause of accidents, most studies rely on expert experience and previous literature as the main sources, resulting in a lack of objectivity. As an important basis for the cause of coal mine gas accidents, the accident investigation report contains the cause, process, and result of the accident, which cannot be ignored. It should be analyzed as an important report to prevent coal mine gas accidents. At the same time, the occurrence of coal mine gas accidents is not the result of a single factor, but the joint action of multiple factors, and there is usually a potential relationship between these factors.