Energy Evolution Law during Failure Process of Coal–Rock Combination and Roadway Surrounding Rock

The deformation and failure of a coal–rock system in a deep environment is affected by its own mechanical properties, natural endowments, and geological structures; it is very important to study the energy evolution law of coal–rock systems. For this purpose, a Particle Flow Code in 2 Dimensions (PF...

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Bibliographic Details
Published in:Minerals (Basel) 2022-12, Vol.12 (12), p.1535
Main Authors: Zhang, Dongxiao, Guo, Weiyao, Zhao, Tongbin, Zhao, Yongqiang, Chen, Yang, Zhang, Xiufeng
Format: Article
Language:English
Subjects:
Anniversaries
Coal
Coal mines
Coal mining
coal–rock combination
Control methods
Crack propagation
Deformation
Dimensions
Energy
energy evolution
Energy storage
energy storage model
Evolution
Geological structures
Interfaces
Mechanical properties
Mines
partition
Prevention
Roads
Roads & highways
roadway surrounding rock
Rock
rock burst
Rockbursts
Rocks
Roofs
Simulation
Two dimensional flow
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Summary:The deformation and failure of a coal–rock system in a deep environment is affected by its own mechanical properties, natural endowments, and geological structures; it is very important to study the energy evolution law of coal–rock systems. For this purpose, a Particle Flow Code in 2 Dimensions (PFC2D) simulation was conducted to assess the coal–rock structure and roadway surrounding rock. The hard roof would produce a rebound “energy supply” phenomenon when the coal was destroyed, and the influence of rock strength on the energy evolution of the coal–rock combination was analyzed. In addition, the energy evolution law of roadway surrounding rock with different roof strength is studied; the energy evolution process of roof and coal seam and deep and shallow coal mass are compared, according to the energy storage characteristics of roadway surrounding rock in different areas; the partition energy storage model of roadway surrounding rock is established preliminarily and the concepts of energy storage area and energy supply area of roadway surrounding rock are proposed; the prevention and control methods of near-field rock burst in deep roadways are discussed, and the research conclusions can provide theoretical reference for the research on the mechanism of rock burst in deep coal mines.
ISSN:2075-163X
2075-163X
DOI:10.3390/min12121535