Study on Time-Effect of Coal and Gas Outburst
Along with increasing of coal mining depth and intensive producing in China, coal and gas outburst is becoming serious daily, and it is becoming very exigent that coal and gas outburst can be forecasted and predicted accurately. Increasing engineering observation and model tests show that coal and gas outburst have the time-effect character. The relationship between time-effect of outburst and geostresses, gas inside coal, physics-mechanics characteristics of coal and external action (blasting) are studied. It is concluded that time-effect of coal and gas outburst is produced by the combination of geostresses, gas inside coal, physics-mechanics characteristics of coal and external action (blasting). The studies show that Geostresses is the decisive factor of time-effect of coal and gas outburst; little coal internal energy and bad outer environmental condition of coal internal energy releasing is the reason caused time-effect as primary importance; when coal and gas system is in critical state disturbance of blasting can induce and accelerate coal and gas outburst , and high disturbance can also induce coal and gas outburst occur when coal and gas system is near critical state; coal and gas outburst is caused by a series of small fractures developing and evolving which has self-organization character, and the evolving of small fractures will control macroscopical failure models of coal and gas system.
coal and gas outburst time-effect geotresses
LIU Baoxian XIONG Deguo XIAN Xufu
School of Architecture and Civil Engineering, Xihua University, Chengdu 610039, China;Key Laboratory Department of Resource and Material Engineering, Henan Polytechnic University, Jiaozuo 454010, China Key Laboratory for the Exploitation of Southwestern Resources ＆ the Environmental Disaster Control E
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
1575-1580
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）