我国煤矿顶板事故特征及发生规律研究

Study on Characteristics and Occurrence Regularities of Roof Accidents in Chinese Coal Mines

为研究我国煤矿顶板事故一般性规律,从事故等级、事故地点、事故原因3方面统计分析近几年顶板事故的基本特征,并从地域、时间两方面进行综合分析。结果表明,一般顶板事故起数和总死亡人数最高;采煤工作面和掘进工作面发生顶板事故的概率较大;工程质量差是顶板事故发生的最主要原因;四川、重庆、贵州、湖南、云南5省市顶板事故起数和死亡人数分别占全国的62.3%和60.0%;春节前后及8月份顶板事故多发,且事故频数白天大于夜晚,交接班与交接班后2小时易发生事故。

For studying the general rules of Chinese coal mines roof accidents ,the basic characteristics of the roof accidents in Chinese coal mines from the year 2005 to 2012 are analyzed from 3 aspects ,the accident levels ,accident sites and causes of accidents and it is also comprehensively analyzed according to region and dimensions of time .The results show that the number and total death tolls of general roof accidents is highest ;the probability of roof accident in coal mining working face and tunneling working face is larger ;poor quality of engineering is the main reason of the roof accidents ;Sichuan , Chongqing ,Guizhou ,Yunnan and Hunan are the key provinces to be managed and the number and total death tolls occupies 62 .3% and 60 .0% respectively of the whole country ;the accidents often occur before and after the Spring Festival and in August ;the accident frequency in the day is greater than that at night ;and the hand-over time and each shift after 2 hours is more likely to accidents .