A Novel Damage Model for Strata Layers and Coal Mass

Faham Tahmasebinia, Chengguo Zhang, Ismet Canbulat, Samad Sepasgozar and Serkan Saydam
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Faham Tahmasebinia: School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Chengguo Zhang: School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Ismet Canbulat: School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Samad Sepasgozar: Faculty of Built Environment, The University of New South Wales, Sydney, NSW 2052, Australia
Serkan Saydam: School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney, NSW 2052, Australia

Energies, 2020, vol. 13, issue 8, 1-17

Abstract: Coal burst occurrences are affected by a range of mining and geological factors. Excessive slipping between the strata layers may release a considerable amount of strain energy, which can be destructive. A competent strata is also more vulnerable to riveting a large amount of strain energy. If the stored energy in the rigid roof reaches a certain level, it will be released suddenly which can create a serious dynamic reaction leading to coal burst incidents. In this paper, a new damage model based on the modified thermomechanical continuum constitutive model in coal mass and the contact layers between the rock and coal mass is proposed. The original continuum constitutive model was initially developed for the cemented granular materials. The application of the modified continuum constitutive model is the key aspect to understand the momentum energy between the coal–rock interactions. The transformed energy between the coal mass and different strata layers will be analytically demonstrated as a function of the rock/joint quality interaction conditions. The failure and post failure in the coal mass and coal–rock joint interaction will be classified by the coal mass crushing, coal–rock interaction damage and fragment reorganisation. The outcomes of this paper will help to forecast the possibility of the coal burst occurrence based on the interaction between the coal mass and the strata layers in a coal mine.

Keywords: rock/joint quality; continuum constitutive model; micro-mechanical interaction; coal–rock interaction damage (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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