DOI: 10.11799/ce201805021
Method and application of setting angle determination for pier column in inclined working face
GUO Dong-ming
FAN Long-fei
LI Xue-bin
YAN Peng-yang
WANG Xiao-ye
DONG Ning
Abstract：The retractable pier column is a new roadway supporting body which for coal mine roadway. It is also one of the most concerned issues in inclined working face. It is of great theoretical significance and application to carry out this research. Based on the background of Fengfeng Group Wutongzhuang 182208 working face, combined with the special structure of the steel pipe nesting in the upper and lower sections of the pier column, the mechanical model is established, and the stress condition is analyzed. Calculation formula for the setting angle is deduced. The results show that size of the pillar is exponentially related to thickness of the old roof, the immediate roof and inclination of the working face. The setting angle decreases with the increase of old roof thickness, while it increases with the increase of immediate roof. According to the field test results, when the setting angle is 2.4°, it can effectively control the bending deformation of the pier structure and improve the bearing capacity of the pier.
Keywords：pier columninclined working facebending deformationsetting anglepier column setting
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 75-78 )