Mechanism Of Mine Pressure Appearance At The Mining Top Slice Of Group A In Panbei Mine

Based on PanBei coal mine11313work face as engineering background, a study about the safe and efficient production concerning the roof slice of A coal seam is carried out by using actual measured,theoretical analysis and computer numerical to analysis and obtain the features of the roof weighting,which includes first weighting interval and cycle weighting interval of the roof.The result is used to provide reliable technical support for safe and efficient production. The study about the advance abutment pressure of the roof slice work face of A coal seam and the features of the abutment pressure in trend as well as inclination are meaningful for work face parameters and surrounding rock control in floor slice work face.First,through sampling and testing the roof rock, analyse and obtains the coal and rock mechanics parameters,and provides the reference for the site observation and numerical simulation. Then based on the observation of working face,ventilation roadway and transportation roadway, reach the the first caving span of11313working face, with the same period weighting step adaptive distance and the hydraulic support on the roof. And then, using Flac3D to establish a numerical model of stope, analyz and study the behavior characteristic of mine pressure along strike and inclination on layered face.