DISCUSSION ON THE FRACTURE OF LAYERED ROCK MASS BASED ON THE FINITE ELEMENT METHOD

XU Ke; DAI Jun-sheng; FU Xiao-long; REN Qi-qiang; LIU Cong-ning; ZHAO Yun

Volume 21 Issue 3

Sep. 2015

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Article Navigation > Journal of Geomechanics > 2015 > 21(3): 330-340

XU Ke, DAI Jun-sheng, FU Xiao-long, et al., 2015. DISCUSSION ON THE FRACTURE OF LAYERED ROCK MASS BASED ON THE FINITE ELEMENT METHOD. Journal of Geomechanics, 21 (3): 330-340.

Citation:

XU Ke, DAI Jun-sheng, FU Xiao-long, et al., 2015. DISCUSSION ON THE FRACTURE OF LAYERED ROCK MASS BASED ON THE FINITE ELEMENT METHOD. Journal of Geomechanics, 21 (3): 330-340.

Citation:

XU Ke, DAI Jun-sheng, FU Xiao-long, et al., 2015. DISCUSSION ON THE FRACTURE OF LAYERED ROCK MASS BASED ON THE FINITE ELEMENT METHOD. Journal of Geomechanics, 21 (3): 330-340.

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DISCUSSION ON THE FRACTURE OF LAYERED ROCK MASS BASED ON THE FINITE ELEMENT METHOD

1.
School of Geoscience, China University of Petroleum, Qingdao 266580, Shangdong, China
2.
Jidong Oil Exploration and Development Institute, CNPC, Tangshan 063004, Hebei, China
3.
School of education, Guangzhou University, Guangzhou 510006, China

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Abstract

Abstract

The failure mode and laws of layered rock mass are unique because of its heterogeneity and anisotropy. By conducting uniaxial, biaxial and three axis compression experiments on layered rock mass and analyzing their stress strain curves, different characteristics have been shown. And then with the software ANSYS, finite element numerical simulation have been done. Comparing stress strain curves and maps of simulation as well as combining the theory of fracture, failure modes and rules of layered rock mass in different stress conditions have been summarized. Finally Futai area was taken as an example to validate the result. This research suggests that the orientations of loads and constraints as well as the rock level are the key factors to rock failure. Rock with strong intensity like limestone would be cracked in priority if stress direction is paralleled to rock level, for stress concentration occurs to the strong rock. While rock with weak intensity like mudstone would be cracked first if stress direction is perpendicular to the rock level. Rock compression experiment, numerical simulation and the example of Futai area have verified this law successfully.
- layered rock mass,
- rock compression experiment,
- numerical simulation,
- failure laws

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References

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