Results 21 to 30 of about 711,778 (240)

Damage Analysis of Concrete Structure under Multidirectional Shaped Charge Blasting Using Model Experiment and Ultrasonic Testing

Advances in Civil Engineering, 2021
Quantitatively analyzing multidirectional shaped charge blasting energy distribution and improving the rock-fracturing efficiency have been a challenging problem in blasting and civil engineering.
Dunwen Liu, Jianjun Zhang, Yu Tang, Yinghua Jian, Caiwu Cai   +4 more
doaj   +1 more source

Experimental study and application of medium‐length hole blasting technique in coal‐rock roadway

Energy Science & Engineering, 2020
In this study, mechanical mechanism analyses of hole cut blasting and in situ hole cut blasting tests using different cutting programs were conducted to investigate the hole cut blasting mechanism under the influence of complicated geological conditions ...
Ziwei Ding, Jindui Jia, Xiaofei Li, Ji Li, Yulong Li, Jinglong Liao   +5 more
doaj   +1 more source

Spatial Variation Law of Blasting Vibration in Layered Strata under Blasting Excavation of Subway Tunnel

Shock and Vibration, 2023
Blasting vibration generated from blasting excavation of subway tunnel may endanger the adjacent structures buried in strata. To guarantee their safety and stability, it is crucial to understand the spatial variation law of blasting vibration in strata ...
Zhen Zhang, Chuanbo Zhou, Nan Jiang, Yingkang Yao   +3 more
doaj   +1 more source

Experimental study on rock-breaking load in slot-hydraulic blasting

工程科学学报, 2020
Slot blasting is widely used in mining and tunnel construction, municipal demolition, water conservation, hydropower, and other related projects due to its low cost and high efficiency.
Bin-wei XIA, Yu-gang GAO, Cheng-wei LIU, Chang-nan OU, Zi-ye PENG, Lang LIU   +5 more
doaj   +1 more source

An innovative method to assess specific charge, drilling and blasting costs considering critical factors of rock mass properties, fragment size and blasthole parameters

Results in Engineering
The specific charge has been given as a function of the blastability index (BI) only in previous research, whereas fragment size is one of the attractive blasting results. The impacts of combination of the important factors such as fragment size, in-situ
Hassan Moomivand, Sina Nayebi, Hussammodin Moomivand, Hamid Masoumzad   +3 more
doaj   +1 more source

The Effect of Blast-Hole Arrangement, Delay Time, and Decoupling Charge on Rock Damage and Vibration Attenuation in Multihole Blasting

Shock and Vibration, 2022
Rock damage and vibration attenuation are the basis of blasting design, which will affect rock breaking results and the safety of structures (buildings).
H.Z. Yue, C. Yu, H.B. Li, C.B. Zhou, S.H. Chen, Z.S. Shao   +5 more
doaj   +1 more source

Study on Critical Damage Width of Parallel Double-Free Surface Blasting

Frontiers in Earth Science, 2022
Reserved rock wall is usually used in blasting operation when one side has an important protection object. Rock wall demolition blasting was essentially a parallel double-free surface blasting; blasting is the ideal effect of casting a side fully broken ...
Jianjun Shi, Xiaopeng Miao, Haili Meng, Huaming An, Wei Zhang   +4 more
doaj   +1 more source

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

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

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