Results 111 to 120 of about 142,974 (226)

Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock

International Journal of Mining Science and Technology, 2017
The rock-breaking mechanism and effect of confined blasting were analysed by blasting and impact dynamic mechanics, fluid dynamic mechanics, fracture mechanics as well as blasting experiment.
Liu Changyou, Yang Jingxuan, Yu Bin
doaj   +1 more source

Phase transitions in dependence of apex predator decaying ratio in a cyclic dominant system

, 2018
Cyclic dominant systems, like rock-paper-scissors game, are frequently used to explain biodiversity in nature, where mobility, reproduction and intransitive competition are on stage to provide the coexistence of competitors. A significantly new situation
Bazeia, D., de Oliveira, B. F., Szolnoki, A.   +2 more
core   +1 more source

Study of the Critical Speed of Ultra-High-Speed Diamond Drilling Technology in Marble

Applied Sciences
In order to effectively improve the drilling speed in deep hard rock and save drilling costs, this study explores the transformation mechanism and critical velocity range of ultra-high-speed diamond drilling technology on rock breaking effect, using ...
Yuxiao Li, Kai Zhang, Yue Wang
doaj   +1 more source

Numerical Simulation on Rock-Breaking Mechanism of Axe-shaped Cutter

Shiyou jixie, 2022
Axe-shaped cutter has good impact resistance and wear resistance,can improve the rock-breaking efficiency of PDC bit,and is widely used in high abrasive and hard formations.In this paper,based on elastic-plastic mechanics and rock mechanics,taking ...
Gong Junyun, Wu Wenxiu, Zhou Zonggan
doaj  

Impregnated drill bits strengthened by nanoparticles for mineral exploration drilling [PDF]

, 2018
In order to improve the drilling efficiency and service life of impregnated diamond drill bit, WC and ZrO2 nanoparticles were introduced into traditional drill bit matrix.
Baochang, L., Siqi, L., Xinzhe, Z., Zhe, H.   +3 more
core  

Fluid evolution and fragmentation characteristics under high pressure water jet impact on thermal rock

International Journal of Mining Science and Technology
In the application of high-pressure water jet assisted breaking of deep underground rock engineering, the influence mechanism of rock temperature on the rock fragmentation process under jet action is still unclear.
Jianming Shangguan, Zhaolong Ge, Qinglin Deng, Yuhuai Cui, Zhi Yao   +4 more
doaj   +1 more source

Study on rock breaking mechanism of single tooth PDC cutting [PDF]

Acta Geologica Sinica - English Edition, 2019
Gao Mingyang, Zhang Kai, Zhou qin, Zhou Huifeng, Liu Baolin   +4 more
openaire   +1 more source

Spartan Daily, February 19, 2014 [PDF]

, 2013
Volume 142, Issue 10https://scholarworks.sjsu.edu/spartandaily/1470/thumbnail ...
San Jose State University, School of Journalism and Mass Communications
core   +2 more sources

A dataset describing chip parameters for rock breaking by chisel pick under deep-sea hydrostatic pressure

Scientific Data
Chip is a visual representation of rock breaking by cutter, and their related parameters are crucial for revealing the rock breaking mechanism in deep-sea mining.
Zenghui Liu, Rui Lv, Xinlei Chen, Kai Liu, Peng Wu, Changyun Wei   +5 more
doaj   +1 more source

Numerical Simulation Study on the Rock Breaking Effect of Multiple Axe-Shaped Cutters in Rotary Percussion Drilling

Shiyou jixie
The compatibility of percussion tools， PDC cutter types and hard rock formations is a key factor in extending the service life of percussion tools and drill bits and achieve the best rock breaking effect， but it has been rarely studied.
Leng Youheng, Wang Lixin, Chen Pengyu, Liu Ronghe, Xi Yan   +4 more
doaj   +1 more source