Study on Simulation Test and Survey Technology of Working Square Subsidence and Shaft Damage

摘要

Mine working squares are important fields for mining activities. Shaft likes a throat in a mine. If it was damaged that will be threaten the mine safety. Because some reasons, such as illegitimate coal pillar, underground mining effect, drain off water and so on, the square may be subsidence or slippage follow the flabby rock formations. So the shaft and some ground buildings may be damaged in the effected bound. In this paper, take the data of a mine in the northeast of our country for instance, and by means of the test study of similar material simulation, the ground subsidence, the movement of coal pillar and the damaged mechanism of the shaft were analyzed. It put forwards the theoretical basis and analytic method according to the survey data to determine the pattern of the subsidence and movement of the square. Using the way to analyze the survey data made from many times observations, the change rule of equivalent rotation axis of the square subsidence or movement can be acquired and some simulation test results can be verified. It provides a scientific basis for the deformation analysis and damage precaution to the shaft and its accessories.