The effect law of deformation and failure a jointed rock mass is essential for underground engineering safety stability evaluation. In order to study the evolution mechanism precursory characteristics instability masses, uniaxial compression acoustic emission (AE) tests are conducted on sandstones with different joint dip angles. To simulate mechanical behavior rock, damage constitutive model A...

A free-wake method is used to simulate the wake from retractable, jointed wings. The method serves to complement existing experimental studies that visualise flying animal wakes. Simulated wakes are shown to be numerically convergent for a case study of the Rock Pigeon in minimum power cruising flight. The free-wake model is robust in simulating wakes for a range of wing geometries and dynamics...

Buchitic glassy rocks appear within the skarn of contact metamorphic aureole of Feshark intrusive complex situated 30 km northeast of Isfahan. Intrusive complex is a multistage intrusion . Noritic gabbro is the first inttrusion which is invaded later on by a granitic melt. Granitic melt has metasomatically altered the gabbro and as a consequence a suite of hybrid rocks like monzogabbro, m...

the deformation modulus of a rock mass is an important input parameter in any analysis of rock mass behavior for geotechnical projects such as dams. the determination of this parameter by in situ tests are time consuming and expensive. therefore, different researchers have proposed empirical relationships for estimating the value of rock mass deformation modulus. this work has been done by usin...

buchitic glassy rocks appear within the skarn of contact metamorphic aureole of feshark intrusive complex situated 30 km northeast of isfahan. intrusive complex is a multistage intrusion . noritic gabbro is the first inttrusion which is invaded later on by a granitic melt. granitic melt has metasomatically altered the gabbro and as a consequence a suite of hybrid rocks like monzogabbro, monzodi...

Numerical testing is an ideal method in the research on mechanical behaviors of jointed rock. However, there are few systematic studies focused comparison between two-dimensional (2D) and three-dimensional (3D) simulation effects rock behaviors, particularly those In this paper, a particle flow model was established by utilizing PFC2D PFC3D to represent materials, (especially rock) (uniaxial co...