五阳煤矿7606工作面顶板“两带”高度预测研究

Based on the detailed analysis of the hydrogeological conditions and mining data in Wuyang coal mine , and combined with lithologic composition and structural characteristics of 3 coal seam 's roof and floor in 7606 working face, This paper set up a geological model which comprehensively reflected the strata combination of 3 coal seam roof. Choosing rock mechanics parameters which were up to the geological model, The article made numerical simulation for the two zones height of 3 coal seam roof in 7606 working face with the method of step-by-step excavation by using FLAC3D numerical simulation software. By the means of analyzing stress variation and distribution characteristics of the plastic zone of 3 coal seam roof in the process of working face advancing, to verify the rationality of the results of numerical simulation, this paper obtained two data that the water fractured zone height of 7606 working face roof was about 45 m to 86.83 m and the caving zone height was about 11.25 m to 21.71 m. The data which acquired above provided a reasonable basis for safe-mining of 3 coal seam and prevention and control of roof water disasters in Wuyang coal mine .