Underground mined-out areas and tailings are the two major harmful consequences from metal mining industry. Cemented Paste Backfill (CPB) method, refilling back to underground areas, has been widely used worldwide. Clear understanding on uniaxial compressive strength (UCS) behavior of CPB is very important for stability analysis backfill structure parameters optimization plan. However, UCS test...

The mechanical deformation and the electrical conductivity of lanthanum strontium cobalt ferrite oxide under uniaxial compression were investigated at various temperatures up to 1073 K. The material reveals a rather complex mechanical behaviour related to its ferroelasticity and completely different stress-strain curves are obtained during the 1st and 2nd loading cycles. A distinctive ferroelas...

Yang Bai 1,†, Chunmei Liu 2,†, Guangyan Huang 1,†, Wei Li 1,† and Shunshan Feng 1,* 1 State Key Laboratory Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China; [email protected] (Y.B.); [email protected] (G.H.); [email protected] (W.L.) 2 First Research Institute of The Ministry of Public Security of PRC, Beijing 100048, China; [email protected] * ...

Nine rock types including Sandstone, Limestone, Siltstone, Dolomite and Marl collected from six different rock formations of the Salt Range area of Pakistan were tested to evaluate the correlations between the uniaxial compressive strength and the corresponding values of the point load index. Two hundred rock cores were drilled and used for the uniaxial compressive strength and point load index...

BACKGROUND Acute cartilage injuries induce cell death and are associated with an increased incidence of osteoarthritis development later in life. The objective of this study was to investigate the effect of posttraumatic cyclic compressive loading on chondrocyte viability and apoptosis in porcine articular cartilage plugs. HYPOTHESIS Compressive loading of acutely injured cartilage can mainta...

Nowadays acoustic emission (AE) testing based on the Kaiser Effect (KE) is increasingly used to estimate the in-situ stress in laboratories. In this work, this effect is assessed on cylindrical specimens in numerical simulations of the cyclic loadings including loading, unloading, and re-loading cycles using a 3D code called the particle flow code (PFC) based upon the distinct element method. T...

High-speed digital photography was used to study rupture propagation on the interface between transparent damaged and undamaged photoelastic plates. Bilateral ruptures were nucleated on pre-machined faults at an angle α to the uniaxial loading axis. Stress concentration at the crack tips produced fringes in polarized laser light that allowed their positions to be measured in successive photos. ...

Lightweight Clay Aggregate (LWCA) is a kind of highly porous granular particle which often used as lightweight backfilling geomaterials. However, the easy breakage LWCA plays negative role in its geotechnical application. This study focuses on internal structure and compressive behavior single using experiments numerical simulations. The uniaxial strength loading stiffness attributed to special...

There have been numerous researchers that have investigated the properties of human intervertebral discs. However, there has been no attempt to characterize the effects of dynamic loading on the compressive stiffness of human lumbar intervertebral discs. Therefore, the purpose of this study was to develop the compressive stiffness properties of lumbar intervertebral discs when subjected to vari...