采矿与安全工程学报2017，Vol.34Issue(4)：817-824,8.DOI:10.13545/j.cnki.jmse.2017.04.030
不同强度含瓦斯型煤瞬间揭露致突特征及其影响机制
Influence mechanism and outburst characteristics during revealing different intensity coal containing gas
摘要
Abstract
In order to reveal the mechanism of coal strength on coal and gas outburst, simulation tests with different intensity briquettes were carried out. With the high-speed video and gas pressure acquisi-tion technology, the test data of outburst within 0.5 s was obtained. The results showed the failure mode and the gas pressure change characteristics between outburst and no outburst are different. For outburst phenomena, the damage form of briquette was a small mouth and a large cavity, and pulverized coal and gas thrown together. Their gas pressure drop rate is as high as 2.5 MPa/s, the drop rate existed two stages,powder coal and gas high speed emission stage and residual gas emission phase. For no outburst phe-nomena, there is a little broken of briquette near the exposing mouth, no coal gas jet flow. The gas pres-sure drop rate was between 0.01~0.02 MPa/s, and it was still higher than atmospheric pressure after its stable. Test shows that the strength of coal hinders the outburst. The uniaxial compressive strength of briquette and mutagenic gas pressure are related in quadratic function, the uniaxial compressive strength of briquette and hole depth are related in negative linear function. During pregnant stage, effective stress strength theory shows when the total stress is equal, the strength of the briquette is lower and the gas pressure is higher, the more easily the coal damaged. Elastic energy and gas expansion energy were calculated, the difference of energy release is the essential reason of coal and gas outburst.关键词
煤与瓦斯突出/含瓦斯煤/煤体强度/影响机制Key words
coal and gas outburst/coal containing gas/coal intensity/influence mechanism分类
矿业与冶金引用本文复制引用
张庆贺,李术才,王汉鹏,袁亮,薛俊华,段昌瑞,张寒..不同强度含瓦斯型煤瞬间揭露致突特征及其影响机制[J].采矿与安全工程学报,2017,34(4):817-824,8.基金项目
国家重大科研仪器研制项目(51427804) （51427804）
国家重点研发计划项目(2016YFC0801402) （2016YFC0801402）
安徽省自然科学基金面上项目(1408085MKL93) （1408085MKL93）
