Results 231 to 240 of about 140,547 (299)

Numerical study on the fragmentation of rock under single free face explosion of variable diameter decoupled charge. [PDF]

Sci Rep
Lyu J, Tao T, Xie C.
europepmc   +1 more source

Analysis of Rock Breaking Load Characteristics and Efficiency Optimization of Roller Cutters under Multi-Factor Coupling

KSCE Journal of Civil Engineering
Jingxiu Ling, Chao Sun, Qianting Wang, Hao Zhang   +3 more
openaire   +1 more source

Study on fracture parameter calibration and failure characteristics of rock with hole and crack

Deep Underground Science and Engineering, EarlyView.
The SIF and plastic zone equations for a single hole and crack have been derived. The model's failure state leads to the identification of four types of cracks. The plastic zone increases with increased brittleness and decreased crack length. Abstract Cracks within the surrounding rock of roadways significantly affect their stability and failure ...
Shaochi Peng, Wensong Wang
wiley   +1 more source

Experimental study on the performance of concrete linear cutting by high pressure water jet. [PDF]

Sci Rep
Zhang L, Lu J, Li H, Li B.
europepmc   +1 more source

Review and prospects of shear test of bolted rock joints

Deep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren, Fan Yang, Manchao He, Yong Yuan, Zhigang Tao   +4 more
wiley   +1 more source

Modifying crude oil synergistic properties with carbon dots and ultrasonic waves. [PDF]

Sci Rep
Razavifar M, Nabipourghazanfari A, Mousavi SB, Zeinali Heris S.   +3 more
europepmc   +1 more source

Investigation on hard‐rock breaking performance and auxiliary mechanism of picks assisted with both‐sided high‐pressure water jets

Deep Underground Science and Engineering, EarlyView.
This paper investigates the high‐pressure water jet‐pick combined rock‐breaking mode (HPC), which employs high‐pressure water jets to precut grooves on both sides of the picks. The rock‐breaking patterns and performance of the HPC method are obtained, and the auxiliary rock‐breaking mechanism of water jet grooving is revealed.
Jingjing Lu, Jiancheng Xiao, Hui Zhou, Xiao Ma, Congcong Hou, Jian Cui, Fujian Yang   +6 more
wiley   +1 more source

Research on the type and expansion mechanism of internal cracks in rocks under the action of PDC. [PDF]

Sci Rep
Liang Y, Du B, Ren J, Feng S.
europepmc   +1 more source

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

Deep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li, Ting Ren, Ningping Yao, Jon Roberts, Haitao Song, Zhongbei Li, Xueqiu He, Liang Zhao   +7 more
wiley   +1 more source

Structural characteristics of the slurry-filled receptive zone in longwall goaf filled with gangue slurry. [PDF]

Sci Rep
Zhao M, Zhu L, Liu C, Gu W, Liu Z.
europepmc   +1 more source