Engineering Rock Mechanics

Questions and answers: rock mechanics interactions and rock engineering systems 237

Orientations of Different sets at Fractures in

different sets

ORIENT- 1 SUP;;~~;SCI affect 1 orientations ‘11, will 1 will have

ATlON have different different

roughnesses

to have clearer

orientations

to be smoother

414.6 Each off-diagonal term in the interaction matrix represents
a mechanism linking two principal factors. If a mechanism involves
three or more principal factors, their combined interaction is repres-
ented by pathways through the interaction matrix. With reference to
the interaction matrix required by Q14.4, show the example path-
way representing how Construction blasting affects the Rock Stress
around an excavation, which allows Fractures to open, leading to
increased Water Flow which then affects Construction.

A14.6 The required pathway is shown in the interaction matrix to the
left below, which is an abstracted representation of the matrix to the
right below, i.e. the one developed for A14.4.

1

Many such mechanism pathways link the principal factors. Consider-

ation of these pathways and how they might be inhibited by engineering