Developing a New Bursting Liability Index Based on Energy Evolution for Coal under Different Loading Rates

Naseer Muhammad Khan, Maqsood Ahmad, Kewang Cao, Imtiaz Ali, Wei Liu, Hafeezur Rehman, Sajjad Hussain, Faheem Ur Rehman and Tufail Ahmed
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Naseer Muhammad Khan: School of Management Science and Engineering, Anhui University of Finance & Economics, Bengbu 233030, China
Maqsood Ahmad: Department of Petroleum Geosciences, Universiti Teknologi PETRONAS (UTP), Seri Iskandar 32610, Malaysia
Kewang Cao: School of Management Science and Engineering, Anhui University of Finance & Economics, Bengbu 233030, China
Imtiaz Ali: Department of Petroleum Engineering, Universiti Teknologi PETRONAS (UTP), Seri Iskandar 32610, Malaysia
Wei Liu: Key Laboratory of Deep Coal Resource Mining (China University of Mining & Technology), Ministry of Education, Xuzhou 221116, China
Hafeezur Rehman: Department of Mining Engineering, Balochistan University of Information Technology, Engineering and Management Sciences, Quetta 87300, Pakistan
Sajjad Hussain: Department of Mining Engineering, University of Engineering & Technology, Peshawar 25000, Pakistan
Faheem Ur Rehman: Graduate School of Economics and Management, Ural Federal University, Mira 19, 620002 Ekaterinburg, Russia
Tufail Ahmed: Department of Mining Engineering, Balochistan University of Information Technology, Engineering and Management Sciences, Quetta 87300, Pakistan

Sustainability, 2022, vol. 14, issue 3, 1-16

Abstract: The risk of a coal burst rises with the excavation depth and other mining-related activities. These devastating coal burst activities are a major concern during deep coal mining. During such activities, the loading rate is a major cause of damage. Different indexes, including the elastic strain modulus index (W et ), bursting energy index (K e ), dynamic failure time index (D T ), and compressive strength index (R c ), are used for coal bursting intensity; however, the loading rate and damage factors are not included in these indexes. In this study, a new coal bursting liability index called the elastic modulus damage index (EMDI) was developed using rock damage variables and the elastic strain modulus index, and is based on energy evolution characteristics under different loading rates. The results of this new index were compared with the existing indexes, and their range was proposed to evaluate coal bursting liability. The EDMI shows a positive polynomial second order degree relationship with W et and K e , having a determination factor of 0.99, while D T shows a negative polynomial second order degree relationship with a determination factor of 0.94. The EDMI and R c show a positive power relationship having a determination factor of 0.99. The relationships with other indexes revealed that the EDMI can be effectively used in evaluating the coal bursting liabilities in different stress environments.

Keywords: coal burst; energy evolution; damage variables; coal mining; burst indexes; EDMI (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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