Nath, Som and Singh,, Ashok K. and Kundu, Jagadish and Verma,, H. K. and Dwivedi, R. D. and Rai, N. (2023) Correlating Textural Parameters with Joint Roughness for Himalayan Schist and Gneissic rocks. Journal of Rock Mechanics and Tunnelling Technology, 29 (1). pp. 49-66. ISSN 0253-4126

Full text not available from this repository.

Abstract

The shear strength characteristics of jointed rock masses are interrelated to the roughness of joint surfaces. These joint surfaces are characterized by mineral grains and their textural arrangements such as orientation, size, shape, degree of grain linking, and relative quantities of grains and matrix in a rock which varies accordingly. Textural Coefficient (TC), a dimensionless quantitative measure, is often used to quantify the intrinsic textural characteristics of rocks. The Joint roughness coefficient (JRC) is a metric that is frequently used to characterize rock mass roughness in the field that inherently controls the inter-block shear strength of jointed rock masses. This parameter has significant importance in the indirect assessment of rock mass strength to be used in a variety of rock engineering projects and has a direct association with the inherent textural parameters. Therefore, in the present work, we have made observations on the Himalayan schist and gneissic lithologies to quantify the potential control of textural characteristics (TC) on joint roughness (JRC). The JRC for studied rock types were measured in field and then statistically derived from the 2D surface profiles using the root means square of the first derivative of the profile outline (Z2). The TC values for studied rock types were estimated using microphotographs of respective joint surfaces. The statistical analyses suggest two groups of data correlation controlled by a threshold TC value of 1.1. Both the groups showed a strong linear correlation between JRC and TC for the studied lithologies signifying the control of textural characteristics on joint roughness. As a result of the study, empirical equations have been proposed to quantify the JRC from Z2 as well as using

Item Type:	Article
Uncontrolled Keywords:	Textural coefficient; Joint roughness coefficient; Statistical correlations; Himalayan lithology
Subjects:	Rock Testing
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	08 Apr 2024 10:36
Last Modified:	08 Apr 2024 10:36
URI:	http://cimfr.csircentral.net/id/eprint/2685

Actions (login required)

View Item