Numerical Simulation Study on Failure Characteristics of Coal-Rock Combination with Fracture

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Authors

  • Peijie Lou
     School of Civil and Architectural Engineering, Anhui University of Science and Technology, Huainan 232001 ,CN
  • Chengjie Li
     School of Civil and Architectural Engineering, Anhui University of Science and Technology, Huainan 232001 ,CN
  • Shuling Liang
     School of Civil and Architectural Engineering, Anhui University of Science and Technology, Huainan 232001 ,IN
  • Mingming Feng
     School of Civil and Architectural Engineering, Anhui University of Science and Technology, Huainan 232001 ,CN
  • Bin Pan
     School of Civil and Architectural Engineering, Anhui University of Science and Technology, Huainan 232001 ,IN

Keywords:

Combination Body, Connected Fissure, RFPA2D, Sound Emission.

Abstract

This paper studies characteristics of deformation failure and fracture growth of fractured coal-rock combination with RFPA2D numerical analysis software. Peak strength of the combination increases with increase of the dip of fracture and the peak strength when dip of fracture is 90° approaches to the peak strength without fracture. Under the same dip of fracture, peak strength of the combination when fracture is in the rock is higher than that in the coal, and fracture in the coal has more significant effect on the strength of the combination than in the rock. If fracture locations in combination are different, the characteristics of fracture growth are different. If dips of fracture in the same location are different, the fracture growth characteristics are different, too. However, fracture growth connection in coal is the main cause of overall failure of the combination body. During the loading, sound emission appears in two ends of fracture and the new fracture in the rock in upper end of the fracture, which mainly is caused by tensile failure. While in the coal, the new fracture in the end of fracture is caused by tensile failure; failures in other part are caused by both tensile failure and shear failure.

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Published

2022-10-22

How to Cite

Lou, P., Li, C., Liang, S., Feng, M., & Pan, B. (2022). Numerical Simulation Study on Failure Characteristics of Coal-Rock Combination with Fracture. Journal of Mines, Metals and Fuels, 66(8), 482–487. Retrieved from https://informaticsjournals.co.in/index.php/jmmf/article/view/31746

Issue

Volume 66, Issue 8, August 2018

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

 

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