Investigating the crack initiation and propagation mechanism in brittle rocks using grain-based finite-discrete element method

Li, X.F.; Li, H.B.; Liu, L.W.; Liu, Y.Q.; Ju, Minghe; Zhao, Jian

doi:10.1016/j.ijrmms.2020.104219

Cited by 119 publications

(38 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides that, Li et al [11] and Huang et al [12] investigated the appearance of the cracks. The geometry of cavities in rocks was studied by Huang et al The short (b) and long (a) axis ratio (b:a) of the rocks was examined.…”

Section: Introductionmentioning

confidence: 99%

Effects of the granite-forming minerals on the surface roughness in the milling processes

Cserta

Gyurika

2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Milling of granite surface is getting increasingly important in the industry. A major problem is that the effect of granite minerals on surface roughness is currently unknown. The research in this article aims to examine these effects. During the experiment, six surfaces with different cutting speeds were examined on the surface of three different granite samples. The color of the various minerals was determined by light microscopy, and a scanning electron microscope (SEM) and X-ray diffractometer (XRD) were used to analyze the composition of the samples, and a confocal microscope was used to measure the surface roughness of each mineral. From the results of the investigations, we deduced different correlations between the minerals forming granite and the surface roughness. Area-based surface roughness was used in this study because it results more accurate data. From the results, we conclude that the roughness of different surface-forming minerals varies greatly. This causes a high average surface roughness value.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of the granite-forming minerals on the surface roughness in the milling processes

Cserta

Gyurika

2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Scholars have developed many numerical models based on mineral distribution, such as the universal distinct element code (UDEC) particle boundary model [13,14], three-dimensional distinct element code (3DEC)-Voronoi model [15,16], distinct element model (DEM) based on three-dimensional polygons [17], particle flow code (PFC)-grain-based model (GBM) [15,18,19], and the Irazu-GBM model [20]. Li et al [21,22] used the finite discrete element method based on grains to study factors, including boundary conditions and rock geometry, affecting the fracture growth process in granite under uniaxial compression. Lan et al [23] carried out a uniaxial compression experiment of a mineral distribution model based on UDEC.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Mineral‐Scale Microcrack Propagation of Shale under Different Loading Methods

Zhang

Cui

Han

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

Producing a sufficient volume of multiscale crack networks is key to enhancing recovery of shale gas. The formation of crack network largely depends on initiation and propagation of microcracks. To reveal the influence of different loading methods on the propagation of mineral-scale microcracks, this study used the Voronoi tessellation technique to establish a cohesive zone model of shale mineral distribution and applied six different boundary conditions to represent different loading methods. Crack path characteristics, rupture characteristics, continuous crack propagation and turning, and en echelon intermittent crack propagation under different loading methods were compared and analyzed. The essence of different loading methods affecting the length and complexity of cracks was the spreading range of tensile microcracks. The mechanical properties of minerals led to dissimilarities in continuous crack propagation and turning. The formation and propagation of en echelon intermittent fractures of different scales were mainly impacted by the heterogeneity of minerals and mineral aggregates. The spreading direction and connection form of en echelon intermittent fractures were mainly affected by the loading method. Conclusions arising from mineral-scale simulations contribute to understanding the mechanism of microcrack propagation resulting from different loading methods, and these conclusions have a guiding significance to enhanced shale gas recovery.

show abstract

“…In addition, the authors also used a hybrid finite-discrete element method to study the blast-induced excavation damaged zone in the top heading of deep tunnels [21]. Recently, a grainbased finite-discrete element method is proposed to investigate the crack initiation and propagation mechanism in brittle rocks [22]. e hybrid finite-discrete element method can naturally model the transition from continuum to discontinuum through failure, fracture, and fragmentation of the continua [13,18], which makes it a promising method for EDZ study.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Finite‐Discrete Element Modelling of Excavation Damaged Zone Formation Process Induced by Blasts in a Deep Tunnel

Liu

Han

2020

Advances in Civil Engineering

View full text Add to dashboard Cite

A brief literature review of numerical studies on excavation damage zone (EDZ) is conducted to compare the main numerical methods on EDZ studies. A hybrid finite-discrete element method is then proposed to model the EDZ induced by blasts. During the excavation by blasts, the rock mass around the borehole is subjected to dynamic loads, i.e., strong shock waves crushing the adjacent rocks and high-pressure gas expanding cracks. Therefore, the hybrid finite-discrete element method takes into account the transition of the rock from continuum to discontinuum through fracture and fragmentation, the detonation-induced gas expansion and flow through the fractured rock, and the dependence of the rock fracture dynamic behaviour on the loading rates. After that, the hybrid finite-discrete element method is calibrated by modelling the rock failure process in the uniaxial compression strength (UCS) test and Brazilian tensile strength (BTS) test. Finally, the hybrid finite-discrete element method is used to model the excavation process in a deep tunnel. The hybrid finite-discrete element method successfully modelled the stress propagation and the fracture initiation and propagation induced by blasts. The main components of the EDZ are obtained and show good agreements with those well documented in the literature. The influences of the initial gas pressure, in situ stress, and spacing between boreholes are discussed. It is concluded that the hybrid finite-discrete element method is a valuable numerical tool for studying the EDZ induced by blasts in deep tunnels.

show abstract

Investigating the crack initiation and propagation mechanism in brittle rocks using grain-based finite-discrete element method

Cited by 119 publications

References 73 publications

Effects of the granite-forming minerals on the surface roughness in the milling processes

Effects of the granite-forming minerals on the surface roughness in the milling processes

Comparative Study on Mineral‐Scale Microcrack Propagation of Shale under Different Loading Methods

Hybrid Finite‐Discrete Element Modelling of Excavation Damaged Zone Formation Process Induced by Blasts in a Deep Tunnel

Contact Info

Product

Resources

About