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Keywords: fragmentation
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Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0522
... ABSTRACT: Sub-level caving (SLC) is a mass mining method that relies on the gravitational flow of blasted ore and the collapse of waste rock. The fine end and the coarse end of blasted particles impact material flow through sublevel interval. Improving blast induced fragmentation has...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0835
... ABSTRACT: Understanding the mechanisms governing the production of large fragments during rotary-percussive drilling is critical to optimizing drilling efficiency. According to the prevailing theory, these fragments can only be produced during the unloading phase of indentations by the closure...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0020
... was identified as the main seismic control measure, the contribution of fragmented ore presents another component capable of reducing the seismic energy release measured at the mine. As part of the seismic hazard research initiative, the National Institute for Occupational Safety and Health (NIOSH) collaborated...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0042
... subdiscipline wellbore instability drilling fluid chemistry wellbore stability experiment characteristic fracture diabase intrusion wellbore design fragmentation rock type drilling fluid property reservoir characterization journal composition instability chen strength university technology...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0952
... ABSTRACT: A drilling system incorporating percussive action is generally preferred for very hard rock to propagate significant cracking and fragmentation. Therefore, improving energy utilization efficiency becomes crucial for increasing the drilling rate. In this study, 3D FDEM simulations...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-1081
... ABSTRACT: Mining operations have long relied on conventional methods of rock fragmentation, such as drilling and blasting, for resource extraction. However, as the mining industry faces increasing demands for efficiency, safety, and sustainability, innovative technologies like laser-induced...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0984
... efficiency tooth torsional percussion drillstring design geological subdiscipline breaking complex reservoir reservoir geomechanics amplitude teeth fragmentation percussion response rotational torque drilling efficiency drilling equipment bit selection frequency platform mechanism loading...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-1184
... Waveform (MSW) model accurately predicted the dominant frequency at highwalls from near-field blasts. Blast design scenarios were then modeled for blast vibration PPV's and dominant frequency. With parameters from the signature hole blast vibration and fragmentation measurement, the Multiple Blasthole...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0238
... and fragmentation. FDEM can model both continuum and discontinuous mechanical behavior, which allows for modeling of fracture in targeted rock at downhole conditions. We simulate PDC cutter-rock interaction in 3-D for a range of back rake angles, cutting speeds, and depth of cuts using granite as our target rock...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 58th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2024
Paper Number: ARMA-2024-0296
... the rock structure in the pattern orientation. An improved understanding of the influence of blasthole pattern in relation to the jointing in the bench could aid blast design selection to achieve the required fragmentation. Numerical modelling using a hybrid finite/discrete element program coupled...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0426
... injured during the process. One of the major environmental impacts of an open pit blast is the flyrock which is a fragment of a rock, that can be any size, it flies after the blast with no calculated direction which may hit the surrounding infrastructures or persons, causing damage and it is a risk...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0380
... challenging to predict rock fragmentation, blast vibration, and the broken-rock mass movement. For blast modeling, previous work has shown that near-field signature-hole blast vibration monitoring is an effective method to obtain critical blast model input. In a blast field, multiple charges create nonlinear...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0831
... blasting consists of a complex process that generally involves explosive detonation, gas expansion, stress wave propagation, rock fragmentation and throw, and muckpile formation. In this regard, we propose a hybrid approach that captures the first-order impacts on the rock movement due to blasting while...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0040
... ABSTRACT: Fragmentation characteristics can provide a good basis for identifying the brittleness level and failure mode in rock materials. Investigating the rock fragmentation is important in many rock mechanics applications such as evaluating the blasting efficiency, wear of cutting tools...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0600
... ABSTRACT: Drilling and blasting are the most common and commercial ways in efficient engineering rock fragmentation, which have been widely used in large-scale engineering like hydroelectric stations, nuclear power plant excavations and open-pit mining and tunneling for decades. As one...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0874
... ABSTRACT: Rotary-percussive drilling technique is an efficient rock-breaking method and can be applied in geothermal drilling. The rock’s fragmentation mechanism was investigated using the distinct element method with the consideration of pre-existing cracks. We developed a cutter-rock...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0756
... Waveform (MSW) near- and far-field blast vibration model, and the Multiple Blasthole Fragmentation (MBF) model. Both MSW and MBF models are built on the fundamentals and empirical aspects of blasting mechanics. The blast vibration at the highwalls from trim blasts was predicted with MSW model. The effects...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-2071
... (undercut columns) and by toppling of basalt columns. The mapped block sizes in the cliff face were larger than the blocks in the associated runout, indicating the cliff blocks were fragmented during impacts in the runout. 1. INTRODUCTION The movement of geologic materials downslope, commonly referred...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-0012
... to simulate the total process of blasting based upon first principles of physics. The 3D kinematic model for muckpile formation was developed and applied as a useful tool to open pit blasts. The multiple blasthole fragmentation (MBF) model developed during recent years has been applied successfully to many...
Proceedings Papers
Publisher: American Rock Mechanics Association
Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1030
... ABSTRACT: In most cases, fine fragmentation is sought for down-stream operations, such as digging, hauling, crushing, and comminution to maximize mineral abstraction and minimizing energy cost. On the other hand, maintaining stable highwalls and undisturbed nearby community from the mine...
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