Ground pressure behavior law at fully-mechanized face in Fenxi-Shu Guang coal mine

摘要

In this paper, based on field observations and theoretical analysis, we discussed the ground pressure behavior law and its characteristic at fully-mechanized face and the material roadway of 10# seam in Fenxi-Shuguang coal mine. The analysis results indicates that ground pressure at material roadway increased sharply when the working face advanced to place 40~50m away from it, and as the advance of the working face, the deformation of the two-sides is clearly bigger than that at the roof and floor in material roadway; Therefore, support in material roadway should be strengthened to ensure the safe mining of working face. We use the ZDYJ-IIA type computer-round figure apparatus to observe the ground pressure of the fully-mechanized face, which can help us analyze the relation of the fully-mechanized mining technique with ground pressure as the advance of the working face, as well as obtain the ground pressure behavior law of fully-mechanized face and calculate pace length of the periodical roof pressure. Analysis on the real-time monitoring results of the setting load and the work resistance show that the hydraulic powered supports used at the working face can fulfill the needs of the working face pressure. Finally, we can obtain the conclusion that the method of the ground pressure observation is scientific and feasible, which includes the real-time monitoring on the fully-mechanized face and placing the observation stations in the material roadway to observe the deformation of material roadway.