### Abstract

Shear behavior and value of peak friction angle of a discontinuity plane is strongly controlled by its surface roughness. As such, surface roughness is an important factor to be evaluated in determining the stability of structures excavated in rock body. Several approaches can be adopted for the determination of surface roughness of discontinuities. This paper presents a simple approach, in the form of two polynominal equations to correlate the peak friction angle (φ _{p}) with the Joint Roughness Coefficient (JRC) for discontinuity plane in fresh and slightly weathered schists. The polynomial equations are φ _{p}= -0.022JRC ^{2} + 3.21JRC + 28.1 for fresh discontinuities and φ _{p}= -0.025JRC ^{2} + 3.24JRC + 26.6 for slightly weathered discontinuity. Both equations exhibited coefficient of determination R ^{2}= 0.98. These results offer an alternative method to estimate φ _{p} of discontinuity planes by measuring the JRC values of the discontinuity planes in the field.

Original language | Undefined/Unknown |
---|---|

Pages (from-to) | 293-297 |

Number of pages | 5 |

Journal | Sains Malaysiana |

Volume | 41 |

Issue number | 3 |

Publication status | Published - Mar 2012 |

### Fingerprint

### Keywords

- Joint roughness coefficient
- Peak friction angle
- Schists
- Tilt test

### ASJC Scopus subject areas

- General

### Cite this

*Sains Malaysiana*,

*41*(3), 293-297.

**Korelasi pekali kekasaran kekar dengan sudut geseran puncak satah ketakselanjaran batuan syis, Semenanjung Malaysia.** / Rafek, A. Ghani; Goh, Thian Lai; Arifin, Mohd Hariri.

Research output: Contribution to journal › Article

*Sains Malaysiana*, vol. 41, no. 3, pp. 293-297.

}

TY - JOUR

T1 - Korelasi pekali kekasaran kekar dengan sudut geseran puncak satah ketakselanjaran batuan syis, Semenanjung Malaysia

AU - Rafek, A. Ghani

AU - Goh, Thian Lai

AU - Arifin, Mohd Hariri

PY - 2012/3

Y1 - 2012/3

N2 - Shear behavior and value of peak friction angle of a discontinuity plane is strongly controlled by its surface roughness. As such, surface roughness is an important factor to be evaluated in determining the stability of structures excavated in rock body. Several approaches can be adopted for the determination of surface roughness of discontinuities. This paper presents a simple approach, in the form of two polynominal equations to correlate the peak friction angle (φ p) with the Joint Roughness Coefficient (JRC) for discontinuity plane in fresh and slightly weathered schists. The polynomial equations are φ p= -0.022JRC 2 + 3.21JRC + 28.1 for fresh discontinuities and φ p= -0.025JRC 2 + 3.24JRC + 26.6 for slightly weathered discontinuity. Both equations exhibited coefficient of determination R 2= 0.98. These results offer an alternative method to estimate φ p of discontinuity planes by measuring the JRC values of the discontinuity planes in the field.

AB - Shear behavior and value of peak friction angle of a discontinuity plane is strongly controlled by its surface roughness. As such, surface roughness is an important factor to be evaluated in determining the stability of structures excavated in rock body. Several approaches can be adopted for the determination of surface roughness of discontinuities. This paper presents a simple approach, in the form of two polynominal equations to correlate the peak friction angle (φ p) with the Joint Roughness Coefficient (JRC) for discontinuity plane in fresh and slightly weathered schists. The polynomial equations are φ p= -0.022JRC 2 + 3.21JRC + 28.1 for fresh discontinuities and φ p= -0.025JRC 2 + 3.24JRC + 26.6 for slightly weathered discontinuity. Both equations exhibited coefficient of determination R 2= 0.98. These results offer an alternative method to estimate φ p of discontinuity planes by measuring the JRC values of the discontinuity planes in the field.

KW - Joint roughness coefficient

KW - Peak friction angle

KW - Schists

KW - Tilt test

UR - http://www.scopus.com/inward/record.url?scp=84858388905&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84858388905&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:84858388905

VL - 41

SP - 293

EP - 297

JO - Sains Malaysiana

JF - Sains Malaysiana

SN - 0126-6039

IS - 3

ER -