The Fracture Process Zone In Granite Evidence And Effect

The seismic techniques of ultrasonic probing and acoustic.

The fracture process zone in granite evidence and effect.

Evidence of the fracture process zone and its effect on fracture toughness were examined for charcoal and rockville granite average grain sizes of 1. Evidence of the fracture process zone and its effect on fracture toughness were examined for charcoal and rockville granite average grain sizes of 1 and 10mm. Evidence and effect august 1987 international journal of rock mechanics and mining science geomechanics abstracts joseph f. The problem analyzed in this study is a fluid driven fracture of a two dimensional crack with a cohesive zone under confining pressure.

235 246 10 1016 0148 9062 87 90178 1 google scholar. Dowdingthe fracture process zone in granite. Dowdingthe fracture process zone in granite. Evidence of the fracture process zone and its effect on fracture toughness were examined for charcoal and rockville granite average grain sizes of 1 and 10mm.

In uniaxial compression tests performed on aue granite cores diameter 50 mm length 100 mm a steel loading plate was used to induce the formation of a discrete shear fracture. Fracture tests were conducted on wedge loaded double cantilever beam specimens 500mm long 200 mm wide 40 mm thick. Fault plane solutions from acoustic events show similar orientation of nodal planes on both sides of the shear fracture. Shear displacement scales linearly with fracture length.

A zone of distributed. This study provides analytical solutions for the apparent fracture toughness using a cohesive crack model which is a model for the fracture process zone. Dowdingthe fracture process zone in granite. The fracture process zone in granite.

The ratio of the process zone width to the fault length in aue granite ranges from 0 01 to 0 1 inferred from crack data and acoustic emissions respectively. Evidence and effect int j rock mech min sci geomech abstr 24 1987 pp.