EOSC 210 Lecture : lecture8-11.pdf
Document Summary
Relate the crustal forces that result from each of the three types of plate boundaries and their relationship to rock behaviour. List and describe the various ties of folds, and examples of their signi cance with respect to engineering. Identify the 3 types of faults and describe the forces and motion responsible for their development. Compare and contrast the characteristics and mechanical behaviour of faults and joints, and how they affect rock mass strength. Stress-the force applied over a unit area (not tangible) Strain-how that force manifests itself in the rock (tangible) Different stresses compression-pushed together. vertical lengthening, horizontal shortening tensional-pulled apart shear-pushed in opposite directions, twisting laterally. Convergent- compression causes shortening of the rock layer through folding and faulting. Stess-strain elastic limit/yieldpoint- strain will not be recovered (property of rock) Brittle/ductile deformation: depends on: kind of stress (cts) 3. temperature: lower temperature requires more stress and less strain percent for fracture.
