Showing papers in "International Journal of Rock Mechanics and Mining Sciences in 2016"

TL;DR: In this article, a new damage constitutive model based on energy dissipation was developed to describe the behaviour of rocks under cyclic loading in underground engineering such as coal mining and tunnel excavating applications.

TL;DR: In this paper, the initiation and propagation and coalescence of one single crack or double cracks in the Brazilian Disk specimens under compressive line loads are investigated using non-ordinary state-based peridynamics (NOSB-PD).

TL;DR: In this article, the variations of thermal conductivity, thermal diffusivity and heat capacity of sandstone after high-temperature heating were reported, which is closely related to the loss of water and damage of structure caused by thermal reactions.

TL;DR: In this paper, a high-resolution microseismic (MS) monitoring system was implemented in the left-bank underground powerhouse caverns, and the correlation between MS activities and construction was established, and three damage regions for the surrounding rock mass during excavation were identified.

TL;DR: In this paper, the authors provide a comprehensive analytical formulation that entails the features of sand production in gas hydrate-bearing sediments, including grain detachment, migration, sediment deformation and hydrate dissociation.

TL;DR: It is concluded that the hybrid of ICA–ANN could be used for predicting UCS of similar rock type in practice, and is obtained that the ICA-ANN model is superior to the others.

TL;DR: In this paper, the dynamic progressive fracturing process of the cracked chevron-notched Brazilian disc (CCNBD) was numerically assessed via discrete element method and it was shown that the cracking front is rather curved with jags and the critical crack surpasses the location specified by the measuring assumption.

TL;DR: In this article, a method based on the acoustic emissions (AE) b-value was developed to predict stress drops and the fault-slip rockbursts induced by the stress drops.

TL;DR: In this article, a tension-weakening model is implemented into FLAC3D, whereby the stiffness of the rock mass is progressively decreased with the failure state, and a relationship between the intensity of fractures and the residual strength of the gateroad is built in the numerical model.

TL;DR: In this paper, an elasto-viscoplastic-creep model is employed to predict the stress-strain relation around the cavern during the construction and cyclic operation phases.

TL;DR: In this article, two distributions of Joint Roughness Coefficient (JRC) were determined based on the JRC data in Oskarshamn/Forsmark, Sweden and Bakhtiary, Iran.

TL;DR: It was found that the best flyrock predictive model is the GEP based-model, which has shown higher accuracy in predicting flyrock than the GP model.

TL;DR: In this paper, a 3D random meso-structure modeling system of soil-rock mixture is developed and used to generate a mesostructural model of soil and rock mixture, and a nonoverlapping combination method was used to model convex polyhedron rock blocks for the DEM numerical simulation.

TL;DR: In this article, displacement-controlled diametral compression tests for the characterization of the cracking pattern according to acoustic emission parameters, three-dimensional localization of the AE sources and petrographic analysis were conducted.

TL;DR: In this paper, a cooling rate index related to how fractured rock masses behave during the heat transfer towards the external environment is proposed, which is related to the degree of fracturing of the rock masses, in order to find a relationship among thermal behavior and the main quantitative fracturing indexes.

TL;DR: In this paper, the authors proposed a coupled hydro-mechanical model considering porous media flow (FDEM-flow) for simulating hydraulic fracturing, which makes full use of the unique topological connection between joint elements and solid elements in the combined finite-discrete element method.

TL;DR: In this article, a soil-rock mixture obtained by mixing rock blocks to the cohesive soil is used for the first time as the core wall material of the Nuozhadu embankment dam.

TL;DR: In this paper, a Bayesian approach is proposed to obtain site-specific joint probability distribution of the uniaxial compressive strength (UCS) and the Young's modulus (E) of rock.

TL;DR: In this paper, a simplified parabolic model is proposed to describe the development process of the boundary of top coal in normal top-coal drawing cycles, where the drawing body is a cut variant ellipsoid (CVE) that can be described by the modified Bergmark-Ross model.

TL;DR: In this paper, the authors studied the fracture behavior of geomaterials of different porosities and water contents under different loading conditions and the role that geommaterial characteristics play in hydraulic fracturing processes.

TL;DR: In this paper, the effects of acidic chemical corrosion on microscopic structures, defect morphology and mineral elements of the granite were observed and analyzed under scanning electron microscopy (SEM) and electron spectroscopy.

TL;DR: In this paper, the influence of shear rate on the mechanical behavior of rough rock joints prepared using a molding method was examined by testing jointed samples of four rock joint groups, which were obtained from the underground caverns of the Huangdao State Oil Reserves in China.

TL;DR: In this paper, a 2D random generation program (R-SRM2D) based on random polygonal rock blocks is developed, and is used to generate the (S-RM) numerical model of the study area.

TL;DR: In this article, a 3D geomechanical model has been built of a cavern close to an old brine cavern, and the effects of the distance between new and old caverns on the safety of the rock mass around the caverns are investigated.