Research On Laws Of Underground Pressure Of Hard Roof In Fully-mechanized Face Of Chenghe Wangcun Inclined Shaft Working Face Of No.10Coal Seam

Chenghe mining area in1210working face of Wangcun inclined seam10#for local coal,recoverable area coal seam thickness0.8m~5.2m, thickness of1.75m. Because the limestonethickness10#coal seam overlying reached5~8m, the overall sturdiness is very good,mining process often can appear large area roof overhang phenomenon, resulting in workingface pressure severe appearance, a serious threat to the safety of working face. Therefore, tostudy the law of working face strata pressure is of great significance.This paper based on the pressure observation of1210working face of mine on the site,using the similar material simulation research method, numerical simulation, Mine PressureRegularity of1210fully mechanized Chenghe WangCun inclined surface isstudied.According to observation, in-situ similar material simulation, analysis the workingsurface support load characteristic, periodic weighting rules and key layer breakingcharacteristic;through theoretical calculations show that the position of key stratum and thefirst weighting step distance, through the UDEC numerical simulation of the miningoverburden movement characteristic field.Research shows that its has particularity in1210fully mechanized working face inChenghe WangCun inclined mine pressure law: basic roof pressure is obvious; the main keystratum overlying rock can form the structure of temporary stability of stope, and influence.Numerical simulation study shows that, with the top height increases, the average stepperiodic roof pressure range, pressure before and after the pressure in front of the workingface, coal wall abutment pressure peak away from coal wall becomes large.