Wang Zhidong1, Li Liyun1, 2, Liu Yi1, Liu Bingquan1, Wei Mengxi1. Analysis of energy release in impact instability damage of briquette model[J]. Journal of Mining Science and Technology, 2018, 3(6): 527-535.
Citation:
Wang Zhidong1, Li Liyun1, 2, Liu Yi1, Liu Bingquan1, Wei Mengxi1. Analysis of energy release in impact instability damage of briquette model[J]. Journal of Mining Science and Technology, 2018, 3(6): 527-535.
Wang Zhidong1, Li Liyun1, 2, Liu Yi1, Liu Bingquan1, Wei Mengxi1. Analysis of energy release in impact instability damage of briquette model[J]. Journal of Mining Science and Technology, 2018, 3(6): 527-535.
Citation:
Wang Zhidong1, Li Liyun1, 2, Liu Yi1, Liu Bingquan1, Wei Mengxi1. Analysis of energy release in impact instability damage of briquette model[J]. Journal of Mining Science and Technology, 2018, 3(6): 527-535.
1School of Mechanics and Civil Engineering,China University of Mining and Technology,Beijing 100083,China;2State Key Laboratory of Coal Resources and Safe Mining,Beijing 100083,China
A large number of energy can be released in coal bumpsIn order to quantitatively calculate energy released amount,the uniaxial compression singlepressure experiment of coal briquette model was carried out,and the ejection velocity of coal pillar in damage was measured by the highspeed photography to obtain energy release situation in failure of coal pillarIn addition,the amount of energy release is calculated by finite element method before and after destruction of the modelTaking into account a certain proportion of energy dissipation,the theoretical ejection velocity of coal pillar can be calculated by energy conservation principle,and the theoretical value is in good agreement with the measured valueFinally,this paper proves that the ejection velocity of coal fragments in failure measured from experiment is the same as the ejection velocity in failure from engineering practice