ABSTRACT

Suppose that change in the regional strain is negligible small during surface mining. Then, relative displacement at point x induced by mining can be represented by the following linear equation.

where u0(x, ρg, EG) is the relative displacement due to gravity. EG and ρg are Young’s modulus and unit weight of the ground, respectively. uX (x, εGxx) and uY (x, εGyy) are the relative displacement arising from normal regional strains εGxx and ε

G yy, respectively.