Study on Protective Coal Pillar Size for Gob-side Entry Driving under the Condition of Strong Dynamic Pressure and Soft Coal
To the problems of large deformation and poor stability of the surrounding rock of the gob-side entry in the fully mechanized mining face under the condition of strong dynamic pres-sure and soft coal,this paper takes the No.5328 working face of Zhaozhuang Mine as the research background to obtain the range of coal pillar size for gob-side entry by theoretical calculation.Then,a numerical simulation model was established to analyze the surrounding rock stress and plastic zone of various widths of coal pillars to determine the reasonable size to be 8 m.On-site mine pressure monitoring showed that the 8m wide coal pillar could meet the safety production re-quirements of the working face.
NETL
NSTL
万方数据
