STUDY ON ROCK MECHANICS IN DEEP MINING ENGINEERING

The rock mechanics problems caused by the deep mining engineering are the focuses in the fields of mining engineering and rock mechanics. A lot of achievements were obtained by scholars through theoretical studyl,aboratory test,and in-site test. Based on the previous studies of authorst,he main differences in engineering mechanics for the characters of rock mass between shallow mining and deep mining are summarized. They are complicated as follows:(1) mining environments with three“high”and one“disturbance”—high ground stress, high earth temperature,high karst water pressure,and mining disturbance;(2) five transform features of mechanical characters;(3) four changes of coal mine types;and (4) six representing types of engineering hazards. By the detailed research on the nonlinear mechanical characters of engineering rock mass in deep mining under complicated geology mechanical environmentsi;t is pointed out that the mechanical system,which is subordinated to engineering rockmass at depth,is the nonlinear mechanical system,but not the linear mechanics system subordinated to engineering rock mass at shallow. The classic theory,methods,and technology are partly or most entirely invalid. So,it is very important to study the basic theory of rock mechanics in deep engineering.