Study on the regularity of pressure appearance and the width of coal pillar in the face of high coal mining face
LIU Qing-li
WANG Meng
Abstract：In view of the problems of mine pressure appearance and the coal pillar design in large mining height fully mechanized working face under complicated geological conditions, taking No. 5302 working face of No. 3 coal seam in Zhaozhuang Coal Mine as the research object, the regularity of mine pressure appear-ance and the reasonable coal pillar width of large mining height in soft coal seam under complicated geological conditions are presented by means of field measurement. The results show that the average working distance of the basic top of the working face is 15. 4 ~ 25m, an average of 21. 4m; the average working resistance of the bracket is 5842. 175kN. The basic top period of the pressure is segmented partial pressure, the pressure step distance is generally about 5. 3 ~ 13. 7m, an average of 8. 9m, the pressure of the bracket is 5588. 23kN. According to the numerical simulation and field observation data, the reasonable net coal column width of 5302 working face should not be less than 40m.
Keywords：large mining heightcomplex geological conditionsmine pressure appearancecoal pillar width
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 47-53 )