Results 41 to 50 of about 381 (161)

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +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

Quantitative Calculation of Critical Depth in Typical Rockburst Mine

Advances in Civil Engineering, 2020
In order to calculate the critical depth of a typical rockburst coal mine quantitatively, which is helpful in rockburst prevention and control, in this paper, the concept of typical rockburst coal mine and atypical rockburst coal mine is put forward ...
Hai Rong, Shiqi Yu, Hongwei Zhang, Bing Liang   +3 more
doaj   +1 more source

Study on the Law of Multi‐Fracture Propagation in Different Fracturing Fluid Viscosity

Energy Science &Engineering, EarlyView.
Samples and equipment Sample preparation Test equipment Analysis of test results Fracture propagation morphology Influence of fracturing fluid viscosity on crack initiation time/(fracture initiation pressure) Evolution law of injection pressure Cumulative relation curve of pressure–time–acoustic ABSTRACT Using the TCHFSM‐I large‐scale accurate triaxial
Zhixing Zhang, Xiang Fu, Yuedong Liu, Xiaoqiang Zhang, Yulong Jiang   +4 more
wiley   +1 more source

Prediction of Rockburst Risk in Coal Mines Based on a Locally Weighted C4.5 Algorithm

IEEE Access, 2021
Rockburst is a dynamic phenomenon characterized by the sudden, abrupt, and violent release of deformation energy in coal and rock masses around mine shafts and slopes that can result in considerable destruction.
Yanbin Wang
doaj   +1 more source

Study on the Influence of Coal Stress Damage on Impact Tendency Under Cyclic Loading and Unloading Effects

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This article aims to explore the response characteristics of coal impact tendency to cyclic load. Through the mechanical damage test of coal sample under cyclic load, the deformation and damage of the coal sample under different cyclic stress, cyclic rate, and cyclic times were analyzed.
Wulin Lei, Hailiang Yu, Dingding Zhang, Yuanjia Shang, Changxiong Shao, Xiaoqian Yuchi, Binde Qin, Pan Shu, Siyang Wang, Junren Gao, Jingshou Liu   +10 more
wiley   +1 more source

Precursor Information Recognition of Rockburst in the Coal-Rock Mass of Meizoseismal Area Based on Multiplex Microseismic Information Fusion and Its Application: A Case Study of Wudong Coal Mine

Lithosphere, 2022
In recent years, the rockburst induced by steeply inclined coal seam mining in the Urumqi mining area has become serious. In this paper, the evolution law of multiplex microseismic information before and after the rockburst is obtained through in-depth ...
Huicong Xu, Xingping Lai, Shuai Zhang, Pengfei Shan, Zheng Wu, Haidong Xu, Rui Bai, Qifeng Guo   +7 more
doaj   +1 more source

Kinematic Limit Analysis of Roof Stability for Elliptical Tunnels in Rock Masses

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 49, Issue 16, Page 3880-3896, November 2025.
ABSTRACT Noncircular cross‐sections are commonly encountered in engineering practice; however, primary attempts to analyze roof stability have focused on circular and rectangular configurations. This study investigates the roof stability of elliptical tunnels with varying aspect ratios, employing two semi‐analytical approaches: piecewise linear and ...
Tae‐Won Seo, Dowon Park
wiley   +1 more source

Research on the Nucleation Mechanism and Early Warning Method of Strain Rockburst in Deep-Buried Tunnel Based on Microseismic Monitoring

Lithosphere, 2022
In order to discuss the nucleation mechanism of strain rockburst, this paper takes the rockburst section of deep diversion tunnel of Jinping Hydropower Project of Yalong River as the research object.
Qun Yu, Chunyan Bao, Shengji Jin, Junxiang Wang   +3 more
doaj   +1 more source

Stress Relief Effects of Roof‐Cutting at the Junction Zone Between Gob‐Side Entry and Stope Within Extra‐Thick Coal Seams

Energy Science &Engineering, Volume 13, Issue 9, Page 4586-4602, September 2025.
The analytical model of severe ground pressure in JZGS: (a) Overlying rock strata structure above the stope and gob‐side entry; (b) in situ monitoring of advanced and lateral abutment pressures. Many studies have demonstrated that the overlying strata above the stope and gob‐side entry fracture and collapse at specific angles [28‐30], forming broken ...
Wenrui He, Fulian He, Wenli Zhai
wiley   +1 more source