Determination of Small Coal Pillar Width and Support Design for Fully Mechanized Mining Face
In order to reduce the waste of coal resources and increase the stability of tunnels,the design work of retaining protective coal pillars was carried out for the 2302(upper)working face of Yuecheng Coal Mine.Combining theoretical calculation methods and numerical simulation methods,after comprehensive analysis,it is determined that leaving a small coal pillar with a width of 6 meters is the most suitable.The stress variation law of the surrounding rock was analyzed,and the anchor mesh cable combined support method was adopted.The effectiveness of the support was verified through on-site monitoring.This method can contribute experience and reference for similar projects.
fully mechanized mining facesafe miningsmall coal pillar widthjoint support