... & Gas phyllosilicate mineral reservoir geomechanics nano-indentation test mechanism loading delamination moduli indentation biotite mineral indenter elastic property anisotropy Zhang muscovite 1. INTRODUCTION As one of the most common minerals composing felsic to intermediate igneous...

... ABSTRACT: Stress-driven instability of roof rocks in coal mine entries can result in large roof falls with associated safety hazards. Failure may be related to spalling, cutter formation, and delamination of bedding of the roof strata. The mode of failure is similar to failure of brittle...

... intersection delamination proceedings international conference compressive failure instability Roof Slab 1. INTRODUCTION The intersections of entries in coal mines produce excavations that have larger spans than the width of the individual entries. Intersection stability has been identified as an area...

... fracture pattern and fracture aperture development in stratified systems. The results show higher vertical pressures enabled fractures to propagate across layer interfaces to form through-going fractures. Delamination at layer interfaces occurred after fracture initiation had taken place on each side...

... and load to be determined (Bawden et al. 1998), knowledge management spokane research laboratory stope US government strain gauge metals & mining delamination king wire microstrain Occupational Safety and Health cable cable bolt gauge instrumented cable bolt instrumented king wire...

... was developed. Multi-layer mica flakes were embedded in an epoxy matrix. Under high stress in the vicinity of a crack tip the mica delaminated, simulating the micro-cracking along grain boundaries or crystal planes in rocks and ceramics. A compact tension specimen was fabricated from micaepoxy composite...