This study examines the mechanical properties and fracture modes of sandstone with single double cracks under varying confining pressures through triaxial compression tests. The stress–strain curves, parameters, both intact cracked are analyzed based on experimental results. finds that presence has a significant impact sandstone, greater damage observed an increase in number cracks. peak streng...

1 A Case Study on Data Quality, Privacy, and Evaluating the Outcome of Entity Resolution Processes Pei Wang, University of Arkansas at Little Rock, Little Rock, AR, USA Daniel Pullen, University of Arkansas at Little Rock, Little Rock, AR, USA Fan Liu, University of Arkansas at Little Rock, Little Rock, AR, USA William C. Decker, University of Arkansas at Little Rock, Little Rock, AR, USA Ningn...

To characterize the coupled hydromechanical behavior of rock fractures, step-rate injection method for fracture in-situ properties (SIMFIP) was conducted with a specialized downhole probe developed by Guglielmi et al. (2014, https://doi.org/10.1007/s00603-013-0517-1). In June 2019, field campaign carried out near Åre, Sweden, where SIMFIP applied in Collisional Orogeny Scandinavian Caledonides-...

The instability and fracturing of gas drainage boreholes are one the main causes low efficiency. Based on rock mass energy principle Barenblatt model, evolution coal–rock around hole, conversion characteristics dissipated Ud, propagation pattern initial tensile cracks were investigated. results show that based process energy, failure samples containing holes can be divided into an dissipation s...

Citlalt petl volcano is the easternmost stratovolcano in the Trans-Mexican Volcanic Belt. Situated within 110 km of Veracruz, it has experienced two major collapse events and, subsequent to its last collapse, rebuilt a massive, symmetrical summit cone. To enhance hazard mitigation efforts we assess the stability of Citlalt petl’s summit cone, the area thought most likely to fail during a potent...

The process of evaluating rock mass strength requires that major structural features such as joints influence are considered. In carbonate masses, however, the is largely dependent on intact and play a secondary role. Laboratory experiments porous have shown reduces with increasing porosity, which has direct effect strength. Rock porosity however not been well accounted for in characterization ...

Excavation of tunnel in rock mass refers to complex continuum-discontinuous processes. For capturing the damages side walls and supports bolts/cables, different types elements shall be used same framework. In this work, a novel method is proposed which couples block, particle, bar for simulating intact mass, broken supporting system respectively during excavation. Brittle Mohr-Coulomb fracture ...

Abstract In this paper, a simplified method for predicting rock mass resistance against tensile forces from anchors (anchor) is presented. The interaction of and was investigated using three-dimensional discontinuous numerical modelling. Several patterns discontinuities were assumed in the modelling while single anchor embedded it. results show that existence discontinuity set sub-parallel to s...

Determining the uniaxial compressive strength of intact rock is primary objective a geomechanical project, and reliable estimate in early phases saves time costs for more sophisticated laboratory tests. The problem knowing which correlations between resistance to compression point load index are reliable, those that cover one or several types (depending on type statistical adjustment). In this ...

We recently identified a novel human protein kinase, p160 ROCK, as a putative downstream target of the small GTPase Rho. Using the human ROCK cDNA as a probe, we isolated cDNA of two distinct, highly related sequences from mouse libraries. One encoded a mouse counterpart of human ROCK (ROCK-I), and the other encoded a novel ROCK-related kinase (ROCK-II). Like ROCK/ROCK-I, ROCK-II also bound to ...