Study on Bursting Liability of Coal-like Material with Pores and Anchors Based on Impact Kinetic Energy Characteristics

Donghai Jiang, Chuanyang Jia (), Yanfei Wang, Zeyu Wang, Wanpeng Huang, Hengjie Luan and Pu Wang
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Donghai Jiang: College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Chuanyang Jia: School of Civil Engineering and Architecture, Linyi University, Linyi 276000, China
Yanfei Wang: Shandong Anke Xingye Intelligent Equipment Co., Ltd., Jinan 250002, China
Zeyu Wang: College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Wanpeng Huang: College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Hengjie Luan: College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Pu Wang: College of Resources, Shandong University of Science and Technology, Tai’an 271019, China

Sustainability, 2023, vol. 15, issue 4, 1-17

Abstract: Drilling unloading, and bolt support are widely used in the practice of coal mine roadway engineering as the means of impact prevention and support. However, the evaluation index of intact coal body is still used in bursting liability evaluation, and the evaluation results obtained do not match with the actual dynamic phenomena in the field, resulting in inaccurate evaluation results and even bringing serious impact accidents. In this paper, uniaxial compression and uniaxial loading/unloading tests are conducted on specimens in different states, and common evaluation indexes are used to evaluate the bursting liability of specimens in different states, and the impact kinetic energy of crushed blocks during uniaxial compression is calculated. Based on this, the bursting liability criterion based on the impact kinetic energy of the crushed block is established and the common bursting liability evaluation index is modified. The bursting liability obtained by the bursting liability discrimination criterion based on the impact kinetic energy of the crushed block is more consistent with the laboratory dynamic phenomena. Therefore, the bursting liability evaluation results based on the impact kinetic energy of the crushed block are more consistent with the actual engineering. And the numerical simulation results verify the correctness of the bursting liability criterion based on the impact kinetic energy of the crushed block.

Keywords: pore-bearing and anchored coal; bursting liability; dynamic phenomenon; impact kinetic energy; evaluation indices (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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