摘要
On the basis of the characteristics of broken rock zone, using the program of "discontinuous deformation analysis(DDA)", the changing law of influential factors of discontinuous rock mass in large broken rock zone was researched quantitatively for the first time. Based on the results of computation, the concept of "key part"of roadways and its stability criterion were brought forward, and it was pointed out that in inclined coal and rock seams the"key parts"of roadways are the upper side and the floor of surrounding rocks, especially the former.
On the basis of the characteristics of broken rock zone, using the program of 'discontinuous deformation analysis(DDA)', the changing law of influential factors of discontinuous rock mass in large broken rock zone was researched quantitatively for the first time. Based on the results of computation, the concept of 'key part'of roadways and its stability criterion were brought forward, and it was pointed out that in inclined coal and rock seams the'key parts'of roadways are the upper side and the floor of surrounding rocks, especially the former.
