Study on the effects of blast damage factor and blast design parameters on the ground vibration using 3D discrete element method

Afrasiabian, Bijan; Ahangari, Kaveh; Noorzad, Ali

doi:10.1007/s41062-020-0286-0

Cited by 11 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most of the empirical damage criteria have been proposed based on PPV, which is referred to as the peak value of the vector resulting from three components, i.e. the longitudinal, vertical, and transversal velocity, as shown in Equation 8 (Afrasiabian et al, 2020):…”

Section: Relationship Between Ppv and The Damage Zone Of A Rock Massmentioning

confidence: 99%

“…Equations 11 to 14 are widely used to calculate the maximum dynamic pressure applied to the wall of the blast chamber (blast hole pressure). The merit of these functions is that they use rock mass properties and explosives to calculate blast hole pressure (Haghnejad et al, 2019;Afrasiabian et al, 2020). (11) Where:…”

Section: Theoretical Considerations On the Dynamic Analysis Of The Blastmentioning

confidence: 99%

See 1 more Smart Citation

Impact of the Layering of Blast-Induced Damage Factors in the Hoek–brown Failure Criterion on the Bench Damage Monitoring of Mines

Mousavi

Ahangari

Goshtasbi

2023

MGPB

View full text Add to dashboard Cite

The process of creating a slope in a rock mass using the excavation and blasting methods consistently leads to stress release in the rock mass, resulting in a certain level of fracture and disturbance. Blast-induced vibrations can also influence the quality of the rock mass remaining after the blasting, as well as the stability and bench damage monitoring (BDM) of mines. A damage factor (D) is included in the Hoek–Brown failure criterion to compute the disturbance of a rock mass in creating a slope. Choosing the value and thickness of the blast zone for the Hoek–Brown criterion is crucial in the safety analysis and BDM of mines. However, the selection is still a crucial technical challenge in this criterion. Employing nonlinear layering, the present study divides the rock mass behind a blast hole into several layers with decreasing D values applied to each layer. The numerical simulation was conducted using the FLAC finite difference software for bench vibration assessment and damage monitoring by checking the peak particle velocity (PPV) in the bench face with different geometries. Behind the blast hole, five different layers of D were considered through which the Hoek–Brown properties of the rock mass declined nonlinearly during the execution of the model. Since the disturbance threshold of PPV was assumed to be 120 mm/s, the toe and middle parts of the small benches were in the disturbance threshold, while for the medium and high benches, only the bench toe was within the disturbance threshold.

show abstract

Section: Relationship Between Ppv and The Damage Zone Of A Rock Massmentioning

confidence: 99%

Section: Theoretical Considerations On the Dynamic Analysis Of The Blastmentioning

confidence: 99%

Impact of the Layering of Blast-Induced Damage Factors in the Hoek–brown Failure Criterion on the Bench Damage Monitoring of Mines

Mousavi

Ahangari

Goshtasbi

2023

MGPB

View full text Add to dashboard Cite

show abstract

“…Only a small amount of the energy used in the blasting process is used for rock fragmentation, with some studies suggesting that only 20-30% of the energy generated by blasting is used for fragmentation. The rest of the energy is spent on adverse effects such as fly rock, vibration, and back break [3][4][5][6]. The degree of ore rock fragmentation is the main index for evaluating the effect of blasting.…”

Section: Introductionmentioning

confidence: 99%

Study On The Damage And Fragmentation Characteristics Of Blasting Ore Rock Based On Different Delay Time Conditions

Zhao,

Chen

2024

Preprint

View full text Add to dashboard Cite

The degree of ore rock fragmentation of mine blasting is an important index for evaluating the effect of engineering blasting. In order to study the effect of millisecond delayed blasting on the internal fragmentation of the ore rock, LS-DYNA numerical simulation software was used to obtain the damage characteristics of the ore rock in the blasting area using the RHT model. The Mohr-Coulomb strength damage criterion was applied to analyze the internal stress state of the ore rock, and the effects of 25ms, 50ms and 75ms delay time conditions on ore rock fragmentation were studied. The results show that, within a certain range of delay time, the degree of rock fragmentation increases with the increase of delay time. The stress state in the ore rock due to blasting is strengthened with the increase of delay time in the direction of the blast hole, which shows that the stress concentration is strengthened from the excavation face to the interior of the ore rock. The damage and the degree of fragmentation show a characteristic relationship of 25ms＜50ms＜75ms, which is verified by carrying out blasting experiments on site.

show abstract

Study on the effect of air deck on ground vibration and development of blast damage zone using 3D discrete element numerical method

2021

View full text Add to dashboard Cite

Study on the effects of blast damage factor and blast design parameters on the ground vibration using 3D discrete element method

Cited by 11 publications

References 34 publications

Impact of the Layering of Blast-Induced Damage Factors in the Hoek–brown Failure Criterion on the Bench Damage Monitoring of Mines

Impact of the Layering of Blast-Induced Damage Factors in the Hoek–brown Failure Criterion on the Bench Damage Monitoring of Mines

Study On The Damage And Fragmentation Characteristics Of Blasting Ore Rock Based On Different Delay Time Conditions

Study on the effect of air deck on ground vibration and development of blast damage zone using 3D discrete element numerical method

Contact Info

Product

Resources

About