Results 41 to 50 of about 458 (163)

FracRough—Computer program to calculate fracture roughness from reservoir rock core

Applied Computing and Geosciences, 2021
Measuring roughness of fractures in buried rock is challenging, but important in estimating fracture shear strength and permeability. Here, we present FracRough, a first-of-its-kind computer program that was developed to calculate the joint roughness ...
Mohamed M. Al-Fahmi, Sait I. Ozkaya, Joe A. Cartwright   +2 more
doaj   +1 more source

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

Determination of joint roughness coefficient (JRC) for slope stability analysis : A case study from the Gold Coast area, Australia

, 2013
Surface roughness of rock discontinuities is an important factor that determines the strength characteristics of rock mass. Joint roughness coefficient (JRC), which is typically measured by means of Barton's combs in the field, is widely used to ...
Gratchev, Ivan, Balasubramaniam, Aramugam, Balasubramaniam, Bala, Kim, Dong Hyun   +3 more
core   +1 more source

Derivation of a Barton standard JRC characterization formula considering sampling interval

河南理工大学学报. 自然科学版
ObjectivesTo achieve accurate characterization of the joint roughness coefficient （JRC）， this study employs the root mean square of the first derivative （Z₂）， a statistical roughness parameter， to quantify the two-dimensional joint profile roughness ...
Wang Gang, Chen Mingrui, Liu Tingfang, Wang Changsheng, Wu Xuezhen, Guan Hui, Chen Huiyuan, Guan Shangshang   +7 more
doaj   +1 more source

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

Deep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei, Mojtaba D. fallahi, Ali Uromeihy, Mohammad R. Nikoodel, Mohammad Fathollahy   +4 more
wiley   +1 more source

Updating Grasselli's 2D morphology parameter for estimating JRC of rock joints

Yantu gongcheng xuebao
The Grasselli's 2D morphology parameter θG used to estimate the joint roughness coefficient (JRC) is questionable, because it only considers the apparent inclination of the shear side and ignores the internal undulation angle.
HONG Chenjie 1, WENG Hanqian 1, WANG Kai 2, 3, HUANG Man 2, 3, TAO Zhigang 1, DU Shigui 4
doaj   +1 more source

Computer Estimation of JRC Index Using Function Moments

Mendel, 2021
The paper deals with a shape of geological discontinuities. This shape significantly affects the stability of rock massifs. The joint roughness coefficient (JRC) is one of the main shape indicators but the methods of its estimation are based on the ...
Dalibor Martisek
doaj   +1 more source

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source

Study on the Accurate Measurement and Quantitative Evaluation Methods of Aggregate Surface Roughness

Advances in Materials Science and Engineering, 2021
In this work, to quantitatively analyze the roughness of the surfaces of road aggregates, the contact measurement technique and contactless scanning technique were, respectively, used to capture the coordinate data of point clouds on the aggregate ...
Luoke Li, Meng Guo, Cong Zeng
doaj   +1 more source

The Seepage Characteristics of Single Rough Joint of Granite Based on NMR Technology: A Modified Cubic Law

Energy Science &Engineering, EarlyView.
The low‐field nuclear magnetic resonance (NMR) measurements are applied to investigate the seepage characteristics of the single rough joint. The purpose of this paper is to investigate the seepage characteristics of granite specimens with single‐joint channel under the different roughness, confining pressures and seepage pressures.
Hao Cheng, Xiujie Zhong
wiley   +1 more source