mined-out
2.Since 1996, tailings have been deposited in a mined-out pit.
5.CAVING OF NO. S6 LEVEL-PILLAR FOR INSULATING MINED-OUT AREA IN SHOUWANGFEN COPPER MINE
7.According to roof safety factor of 1.2 for the mined-out area, minimum safety roof thickness at different rock in various span mined-out area was calculated by FLAC software, which transfixion of plastic zone was taken as criteria of roof breakage by using strength reduction technology and dichotomy theory.
8.Abstract: In the exploration process for harnessing and renovating local railways in Shanxi,the interborehole electromagnetic wave fluoroscopy was used to search for mined-out area of coal pits,which yielded satisfactory geological effects.
9.Abstract: The paper is based on the working particle for sever al bridges in the construction of W8 section of Sheng-yan Railway project.It sy stematicaly instructs the construction method of bore-hole filling pile in the rock area with under-earth mined-out layer.
10.According to the actual condition in Jinchuan Longshou Mine, using three-dimensional numerical simulation, this paper analyzes the stresses, displacements and safety factors of mined-out area and filling body under the conditions of different filling height of down hexagon drift, and the drew conclusions provide theoretic guidance for safety mining.
