Results 31 to 40 of about 49,627 (206)

Study on fragmentation characteristics of rock mass in bench blasting with different coupling media

Frontiers in Earth Science
The fragmentation size distribution is an important index to evaluate blasting effect. Based on stress wave theory, a blasting fragmentation distribution model is established, and the key influencing factors were clarified.
Tong Li, Tong Li, Ming Chen, Bo-wen Guo, Bo-wen Guo, Li Song, Li Song, Bing Fan, Bing Fan, Shan-shan Cui, Shan-shan Cui   +10 more
doaj   +1 more source

Scientific and technical fundamentals for explosive destruction of the mass composed of rocks with different hardness [PDF]

, 2017
Purpose. To develop the technology for explosive destruction of solid inclusions in the mass of rocks with different hardness on the basis of established correlations between changes in the radius of hard streaks fragmenting, fracturing density and ...
Karimov, Sh, Ravshanova, M, Zairov, Sh
core   +3 more sources

Study on the Charge Structure Optimization for Coal–Rock Mixed Blasting and Separate Mining in Open-Pit Mine with High Benches

Applied Sciences
This study systematically analyzes the influence of the charge length-to-diameter ratio and stemming length on the radius and volume of blasting craters in coal and rock blasting crater tests to effectively address the challenge of achieving coal–rock ...
Anjun Jiang, Honglu Fei, Yu Yan, Yanyu Liu, Shijie Bao, Jian Guo   +5 more
doaj   +1 more source

Research on Cumulative Damage Characteristics of Rock Anchor Beam Concrete Supporting Structure by Blasting Vibration of Underground Powerhouse

Shock and Vibration, 2021
Aiming at the dynamic disturbance problem of the upper rock anchor beam concrete support structure caused by the blasting excavation of the lower rock mass of the underground powerhouse of the hydropower station, the dynamic finite element software was ...
Sheng Wan, Junhong Huang, Yi Luo, Xinping Li, Qingsong Pu   +4 more
doaj   +1 more source

Use of Rock Mass Rating (RMR) values for support designs of tunnels excavated in soft rocks without squeezing problem [PDF]

, 2019
Effect of the rock material strength on the RMR value and tunnel support designs were investigated within this study including site works, analytical and numerical analyses.
Demir, Serhat, Komurlu, Eren
core   +1 more source

Analysis of Cumulative Damage for Shared Rock in a Neighborhood Tunnel under Cyclic Blasting Loading Using the Ultrasonic Test

Shock and Vibration, 2020
In blasting excavation of neighborhood tunnels, damage accumulation process in surrounding rock is inevitable. To explore the influence of damage accumulation of rock mass under multiple blasting loads, we analyzed the vibration damage accumulation ...
Feng Cao, Sheng Zhang, Tonghua Ling
doaj   +1 more source

Improvement of hole drilling technology for ore drawing intensification [PDF]

, 2018
Purpose. The improvement of hole drilling for increasing the mineral recovery ratio by ore drawing improvement through blasting. Methods. The drilling parameters were examined for rock dumps.
Gaponenko, I, Golik, V, Morkun, N, Morkun, V   +3 more
core   +1 more source

Influence mechanism of rock joints on blasting fragmentation

Yantu gongcheng xuebao
The influences of rock joints on the formation of blasting fragmentation have always been a hot issue in blasting engineering, which is one of the most important factors affecting the construction efficiency and long-term operation safety.
HU Yingguo 1, 2, RAO Yu 1, 2, CHAI Chaozheng 3, WU Xinxia 1, 2, YANG Zhaowei 1, 2, ZHOU Xianping 1, 2
doaj   +1 more source

Study on Blasting Technology for Open-Pit Layering of Complex Mine Adjacent to High and Steep Slope

Frontiers in Earth Science, 2021
In China, mining blasting vibration has seriously threatened the safety and stability of high and steep rock slopes. In this paper, taking the east mining area of Jianshan Phosphorus Mine as the research background, combined with field survey, field ...
Menglai Wang, Xiaoshaung Li, Xiaoshaung Li, Xiaoshaung Li, Qihang Li, Yunjin Hu, Qiusong Chen, Song Jiang   +7 more
doaj   +1 more source

Quantification of potential macroseismic effects of the induced seismicity that might result from hydraulic fracturing for shale gas exploitation in the UK [PDF]

, 2014
The furore that has arisen in the UK over induced microseismicity from ‘fracking’ for shale gas development, which has resulted in ground vibrations strong enough to be felt, requires the urgent development of an appropriate regulatory framework.
Westaway, Robert, Younger, Paul L.
core   +1 more source