Rheological Analysis of Coal and Gas Outburst and Its Noncontact Prediction Technology

Wang Yungang; Wang Enyuan; He Xueqiu; Liu Zhentang; Zhang Hongjie

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Rheological Analysis of Coal and Gas Outburst and Its Noncontact Prediction Technology

Wang Yungang * #,Wang Enyuan,He Xueqiu,Liu Zhentang,Zhang Hongjie

China Univeristy of Mining & Technology

*Correspondence author

#Submitted by

Subject:

Funding: 国家自然科学专项基金项目,国家“十五”科技攻关项目,国家973计划,江苏省自然科学基金（No.50427401,2004BA803B0105,2005CB221505,BK2001075）

Opened online: 8 November 2007

Accepted by: none

Citation: Wang Yungang,Wang Enyuan,He Xueqiu.Rheological Analysis of Coal and Gas Outburst and Its Noncontact Prediction Technology[OL]. [ 8 November 2007] http://en.paper.edu.cn/en_releasepaper/content/16220

According to the time effect of material failure, the rheological damage process of coal or rock, especially its creep characteristic, is analyzed. The method of controlling the catastrophic creep failure is proposed abstractly and the result that the Ⅱand Ⅲ stages of creep failure of coal or rock is vital to predict gas outburst with the EMR. Based on the transformation of energy and rheological explanation of outburst phenomena, the relationship between the rheological energy dissipation process of coal or rock containing gas and the energy transformation is analyzed, the results show that the EMR is produced in the rheological failure process of coal or rock containing gas before the gas outburst, and the EMR reflect the stress state of coal or rock containing gas. The effect of non-equilibrium gas on the EMR in the gas outburst process is debated, and the EMR can reflect the coal seam gas pressure. Therefore, the EMR reflect comprehensively the danger of coal outburst before working faces. Eventually, the EMR monitor gets satisfied results in application.

Keywords:time effect; coal or rock containing gas rheology; creep characteristics; EMR; outburst monitoring technology

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