... ABSTRACT: Deep rock mass is affected by loads such as upper self-gravity stress and tectonic ground stress, and the response of rock bodies under blasting dynamic loads is more complex. In order to study the energy evolution law and fractal characteristics of deep marble during the damage...

... conducted on the universal testing machine. Testing results showed that the tensile strength increased with the stress rate, but decreased with the specimen size. The loading mode of stress waves hardly affected dynamic tensile strength. It can be explained by the failure characteristics of BD specimens...

... ABSTRACT: The strong heterogeneity of conglomerate, a main component of gravel layer, leads to severe vibration of drilling string and complex impact loadings. The strength and failure characteristics of conglomerate are not clear currently, which seriously restricts the drilling process...

... ABSTRACT: All underground structures are commonly supported by rock bolts and shotcrete, especially if excavated using the New Austrian Tunnelling Method (NATM). This leads to a combined load support interaction system. Many studies are found on the performance of rock bolts under static...

... particles under central blast shock. In order to capture the high-speed impact induced by blasting load, the blast induced by TNT explosion in granite sample is simulated, with different damping ratios being considered. The modelling results are compared with experimental data, indicating...

... ABSTRACT: Rock is heterogeneous in nature in the field and its behaviour is jointly governed by intact rock properties and joints. The jointed rocks encounter repeated loading and unloading in hydraulic running tunnels, during injection and retrieval of compressed air energy from compressed...

... under impact loading. Our numerical results show that, similar to that of the physical test, with the increase in prefabricated angle, the trajectory of the crack gradually tends to be straight. Following this, numerical tests, established by DLSM and 4D-LSM, are conducted to analyze the influences...

... the coupling W-D cycles and cyclic loading is of great theoretical and practical importance to enhance the long-term stability analysis of rock engineering. geology impact cycle rock mechanic geologist sandstone wave velocity sedimentary rock rock type cyclic sandstone clastic rock experiment...

... ABSTRACT: The research was performed to assess the effects of loading frequency on mechanical characteristics of the Khao Ya Puk Formation sandstone in the northern part of Thailand. The aims of this research are to assess fatigue behaviour and compare stress-strain deformation in rocks...

..., by using the experimental technique of dynamic photoelasticity in conjunction with a high-speed camera, we have been observing time-dependent stress transfer and fracture development in confined/unconfined birefringent granular media subjected to external impact loading. Here, we describe our recent...

... ABSTRACT: In order to study the failure evolution characteristics of fractured coal rock under combined loading of graded pre-static load and different dynamic load amplitude levels, the coal rock with strong impact tendency of prefabricated fractures with different inclination angles...

... shear displacement hexagonal bar shear stress geology geological subdiscipline laboratory test rock mass loading shear stress and shear displacement normal stress friction angle test result research method and laboratory test reservoir geomechanics displacement mechanical property...

... extensively used in engineering fields. Although a considerable amount of effort has been devoted to investigate their behaviours against external loads, few works had been brought into focus to discover its dynamic response subjected blast loading. In this paper, an entire finite PE pipeline model base...

... and possible counter measures for their stabilization. As Japan is a seismically active country, the stability assessment of the caves under earthquake loading is also very great importance. geology geological subdiscipline karstic cave reservoir characterization rock mass cavity geologist...

... mechanical property loading Upstream Oil & Gas lateral gauge lateral stress rock material gabbro hugoniot elastic limit shear strength Carrara marble millett Rock Dynamics: From Research to Engineering Li et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-02953-8 227 Shear...

... have mainly focused on loading the materials using a gas gun in a one dimensional strain configuration to measure high strain rate properties in compression, tension and shear. Progress has been made towards generalizing these results to provide predictive methodologies for other materials. In addition...

... loading granite specimen Rock Dynamics: From Research to Engineering Li et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-02953-8 239 Full field strain statistics and failure mechanism of granite under dynamic and quasi-static compression L.J. Zhou, S.L. Xu & C.Y. Shi CAS key...

... Oil & Gas Rock mechanics specimen loading crack initiation Reservoir Characterization Simulation mechanics international journal failure strength Voronoi tessellation Rock Dynamics: From Research to Engineering Li et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138...

... geomechanics Upstream Oil & Gas strength Reservoir Characterization Engineering classification mohr-coulomb failure criterion Earthquake Geophy fluid injection extraction seismicity Rock mechanics plane loading pore pressure mechanism frictional coefficient Rock Dynamics: From Research...

... ABSTRACT: In the construction of rock engineering, the soft rock tunnel is generally excavated using the drilling and blasting method, and thus the rock mass is subjected to dynamic loading. The fracture behavior of rock mass under dynamic loading is different from that under static loading...