Rock resonance crushing

Rock fragmentation mechanisms and an experimental study

2013518  Abstract. Resonance drilling is a new technology, still at the laboratory stage. It has great potential to improve rock fragmentation efficiency. We analyzed the

Feasibility Study and Prospects of Rock Fragmentation Using

2020825  This stone systematically examines the feasibility of using ultrasonic vibration excitation for rock breakage and fragmentation; it focuses on the failure

Simulation and experimental research on ultrasonic vibration

202251  Ultrasonic vibration rock crushing technology is a new type of rock crushing method, and it can be used in hard rock drilling. By applying high-frequency cyclic load to

Energies Free Full-Text Ultrasonic-Assisted Rock

20221110  The optimal combination of parameters for vibration and crushing in the test is as follows: static load pressure of 400 N, amplitude of 100, and frequency of 35 kHz; within the effective resonance frequency

Research on the Resonance Characteristics of

201971  Abstract. In order to study the resonance characteristics of rock under harmonic excitation, two vibration models have been presented to estimate the natural frequency of rock encountered during the drilling.

Effect of Static Loading on Rock Fragmentation Efficiency

2019121  The resonance state may be broken with increasing static loading, affecting the drilling efficiency. To improve the rock fragmentation efficiency in the

The Mechanical Properties of Granite under Ultrasonic Vibration

2018103  The new technique of using ultrasonic vibration to break hard rock is still in the experimental stage, but it has significant potential for improving the efficiency of hard

Study on Granite Crushing Law under Ultrasonic Multi

2022315  1. THEORY OF ROCK FRAGMENTATION UNDER MULTI-PARAMETER COUPLING OF ULTRASONIC VIBRATION Based on the theory of rock fragmentation,

Effect of Static Loading on Rock Fragmentation

2023815  Under the resonance condition, rock will be easily fragmented, and the drilling speed as well as the bit life will increase substantially. However, the above tested

Simulation and experimental research on ultrasonic vibration

202251  Ultrasonic vibration rock crushing technology is a new type of rock crushing method, and it can be used in hard rock drilling. By applying high-frequency cyclic load to the rock, it promotes the expansion and penetration of micro-cracks inside the rock, causing fatigue damage, reducing the rock strength, and thus improving the rock crushing

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Effect of Static Loading on Rock Fragmentation

2023815  Under the resonance condition, rock will be easilyfragmented,andthedrillingspeedaswellasthe crushing effect and consumed energy of the rock particle sample was analyzed by numerical code

(PDF) The Mechanical Properties of Granite under

2019120  At resonance, the overall increment in the values of the measured parameters was noted as 16–30 for longitudinal quality-factor, 9–20 for torsional quality-factor, 1.5–2.2 kHz for

Rock Mechanics and Rock Engineering Online first articles

20231028  Modeling Interactions between Hydraulic and Closed Natural Fractures in Brittle Crystalline Rocks: A Fluid–Solid Coupling Grain-Based Approach for Characterizing Microcracking Behaviors. Song Wang. Jian Zhou. Yanlong Kong. Original Paper. Published: 17 October 2023.

Effect of Static Loading on Rock Fragmentation Efficiency

2019121  Supporting resonance state is the key to improve the hard rock fragmentation efficiency, because the inner stress and strain will increase sharply under resonance. 4 Discussion Based on the simulation results above, in order to support the resonance state, both the vibration frequency and rock inherent frequency should be

Mesoscopic structural damage and permeability evolution of

202229  To study the mesoscopic damage and permeability evolution characteristics of rock under freeze–thaw (F–T) cycles, freeze–thaw cycle experiments were carried out of shale under different F

Numerical simulation study on rock-breaking process and mechanism

2021111  A crushing pit beneath the cutter with a broken depth of 1.82 mm is formed, and the total volume of the rock crushing zone reaches 5.06 mm (Saksala et al., 2018). It is worth noting that the propagation cracks in the rock lead to a decrease in the stiffness of the cohesive elements near the crack propagation zone.

Research on the mechanism and performance of free-surface rock

202241  Furthermore, based on the analysis of the rock breakage process in Section 4.1, a larger crushing pit represents a larger peak PFPM and higher SE; hence, it is necessary to avoid a larger crushing pit during the rock breakage process. Download : Download high-res image (172KB) Download : Download full-size image; Fig. 14.

Buildings Free Full-Text The Classification and

2022714  Old cement pavement directly overlaid with an asphalt layer produces many reflection cracks. Using microcrack homogenization technology to treat old cement pavement can effectively reduce the

Numerical Simulation of Heterogeneous Rock Using Discrete

2016622  Experimental results obtained by many studies revealed that rock strength is considerably affected by the existence of different minerals. The nature of minerals suggests that the presence of strong elements such as quartz increases the rock strength and, on the other hand, the abundance of weak minerals such as mica decreases the

Feasibility Study and Prospects of Rock Fragmentation Using

2020825  This provides a theoretical basis for improving the rock-crushing performance of acoustic drilling machines. Fheed et al. [11,12] and Węglarz et al. used nuclear magnetic resonance (NMR) and computed microtomography to study the three-dimensional morphology of fractures in fractured rock masses. This research method has

Rock fragmentation mechanisms and an experimental study

201361  Resonance drilling is a new technology, still at the laboratory stage. It has great potential to improve rock fragmentation efficiency. We analyzed the amplitude-frequency characteristics of

Effect of Static Loading on Rock Fragmentation Efficiency

201981  crushing effect and consumed energy of the rock. particle sample was analyzed by numerical code. keeping rock resonant is the key to improve the rock. fragmentation efficiency for UVD.

Experimental study on crack characteristics and acoustic

20211210  Grain size composition, crack pattern, and crack length have a significant influence on the crack characteristics, mechanical characteristics, and acoustic emission characteristics of rock masses.

Experimental and Simulation Study on Breaking Rock under

202225  3. Rock Breaking Experiment under Static Loading and Ultrasonic Vibration. To investigate the mechanism of rock crushing effect under the combination of static loading and ultrasonic vibration, the infrared time-space evolution test, rock porosity test, and uniaxial compressive strength test of rock under the combination of static loading and