Model test study on cracking condition and propagation path of main structural plane tip in compression-shear type of perilous rock

Model test study on cracking condition and propagation path of main structural plane tip in compression-shear type of perilous rock

Jingyu ZhangZuosen Luo Guoyong Duan 

College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China

College of Civil Engineering & Architecture, China Three Gorges University, Yichang 443002, China

College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China

Corresponding Author Email: 
zjy7268@sina.com
Page: 
42-47
|
DOI: 
https://doi.org/10.18280/eesrj.050202
Received: 
10 April 2018
|
Accepted: 
6 June 2018
|
Published: 
30 June 2018
| Citation

OPEN ACCESS

Abstract: 

Aiming at the compression-shear damage type perilous rock, I establish a uniaxial compression test indoor to research how different inclined angles’ and lengths’ of main structural plane impact on the fracture critical stress of test sample and propagation path of crack. The study shows that: when main structural planes of samples have the same length, the fracture critical stress of test sample increases along with the increasing of main structural plane’s inclined angle; when main structural planes of samples have the same inclined angle, the fracture critical stress of test sample decreases along with the increasing of structural plane’s length. The branches of crack include wing crack, collinear crack and inclined crack. The collinear crack appears frequently, the wing crack follows and the inclined crack appears rarely. In addition, the wing crack’s propagation angle relatively conforms to the angle of maximum circumferential stress criterion. According to experimental research on main structural plane tip propagating in compression-shear damage type perilous rock, I acquire regularity which has positive significance to further study on main structural plane tip extending in other types of perilous rock.

Keywords: 

perilous rock, compression-shear damage, main structural plane; model test, crack condition

1. Introduction
2. Model Test
3. Results and Analysis
4. Discussion
5. Conclusions
Acknowledgement
Nomenclature
  References

[1] Chen HK, Tang HM, Wang LF. (2009). Evolutionary theory and application of perilous rock collapse. Beijing: Science Press. 

[2] Chen HK, Xian XF, Tang HM. (2010). Developing Mechanism for Collapse Disaster in Rocky Mountain Area. Journal of Sichuan University (Engineering Science Edition) 42(3): 1-6.

[3] Chen HK, Tang HM, Ye SQ. (2006). Damage model of control fissure in perilous rock. Applied Mathematics and Mechanics 27(7): 967-974.

[4] Chen HK, Tang HM. (2007). Method to calculate fatigue fracture life of control fissure in perilous rock. Applied Mathematics and Mechanics 28(5): 643-649.

[5] Chen HK, Xian XF, Tang HM. (2009). Stability analysis method for perilous rock by fracture mechanics. Journal of Chongqing University 32(4): 434-437.

[6] Tang HM, Wang Z, Xian XF, Chen HK. (2011). Violent-slide rock avalanche and excitation effect of perilous rock. Journal of Chongqing University 34(10): 39-45.

[7] Chen HK, Zhang RG, Tang HM, Zhao XT. (2012). Elastic & impulsive dynamic parameters of a ruptured compression-shear perilous rock. Journal of Vibration and Shock 31(24): 33-36.

[8] Tang HM, Wang LF, Chen HK, Xian XF. (2010). Collapse sequence of perilous rock on cliffs with soft foundation. Chinese Journal of Geotechnical Engineering 32(2): 205-210.

[9] Zhang YX, Lu L, Zhang SP, Hu DW. (2010). Development and failure principle of differential weathering overhanging rock. Journal of Civil, Architectural & Environmental Engineering 32(2): 1-6.

[10] Sih GC. (1974). Strain-energy-density factor applied to mixed-mode crack problems. International Journal of Fracture 10(3): 305-321.

[11] Tasdemir MA, Maji AK. (1990). Crack Propagation in Concrete Under Compression. Eng. Mech. 116: 1058-1076.

[12] Zhao YH, Xu SJ. (2002). I-II compound crack the smallest J2 criterion of brittle fracture. Engineering Mechanics 19(4): 94-98.

[13] Kulatitake PHSW, Balasingam P, Jinyong P, Morgan R. (2006). Natural rock joint roughness quantification through fractal techniques. Geotechnical and Geological Engineering 24(5): 1181-1202.

[14] Stoychev S, Kujawski D. (2008). Crack-tip stresses and their effect on stress intensity factor for Crack propagation. Engineering Fracture Mechanics 75: 2469-2479.