Practice of Large Mining Height Fully Mechanized Caving Mining Small Coal Pillar Roadway Excavation Along Goaf Technology in Yonghong Coal Mine
The traditional setting of large coal pillars in the 38-45 m section of Yonghong Coal Mine in the past caused serious waste of resources.Taking the 15102 extra thick coal seam large mining height fully mechanized caving face as the engineering background,theoretical analysis,numerical simulation,and on-site observation methods are used to conduct practical research on the technology of small coal pillar roadway excavation along goaf,the upper and lower limits of the width of the small coal pillar are calculated,determine a reasonable small coal pillar width of 6 m,design is conducted on support of the small coal pillar roadway along goaf during excavation and stoping period.The results show that the use of a 6-meter small coal pillar roadway excavation along goaf technology can effectively control the stability of the surrounding rock during excavation and stoping period,and significantly improve the resource recovery rate.
large mining heightalong goafroadway excavationcoal pillar
国家科技期刊平台
NSTL
万方数据
