Study on the Creep of Damage-Containing Anthracite: Theory and Experiment

Fractal derivatives characterize the accelerated creep phase of process. In this study, based on fractal order theory, integer-order are defined from spatio-temporal self-similarity phenomenon dynamic process using scale change method, and viscoplastic model is improved to establish a new instantonal with damage describe complete anthracite. The effects variables initial were investigated by performing graded-loading tests. Based experimental data, inversions model-related parameters performed, parameter sensitivities analyzed. results show that proposed can better anthracite coal, which verifies correctness rationality model. content affects strain under different loading levels, specific functional relationship exists between them. study’s findings provide some reference material for stability control affected disturbing stresses.