燕山煤矿区段护巷煤柱的理论分析和数值分析

区段煤柱的稳定性决定着回采巷道的稳定性,对巷道维护状况有重要影响.煤柱过窄,煤柱会遭到破坏,导致承载能力减小威胁巷道稳定性；煤柱过宽,导致煤炭损失严重,影响矿井经济效益.通过数值计算软件模拟工作面开采与巷道掘进,分析煤柱应力及塑性区,并与由理论分析计算的护巷煤柱宽度相比较,可为确定煤柱宽度提供依据.

Theoretical Analysis and Numerical Simulation of Coal-pillar between Mining Faces in Yanshan Mining Area

Stability of coal-pillar between mining faces directly influences that of mining roadway.Too narrow pillar will result in low carrying capacity and reduce roadway stability,but too wide pillar will lose much coal resource.This paper analyzed stress and plastic zone of coal pillar by numerically simulating face mining and roadway driving.The simulation results were compared with theoretical calculation results and could provide reference for designing rational coal-pillar width.