长壁采场超前应力分布及煤柱留设研究

摘要

3101 working face is the first large mining height working face of Chahasu coal mine.3101 coal seam's buried depth than the surrounding of deep mine.Knowing well the working face support pressure distribution rule will determine the consecutive forepole distance and the supporting method,it will provide the scientific basis a-bout the stability of empty left lane.In this paper,using the limit equilibrium theory analysis and field measurement studies the rule of 3101 working face support pressure distribution,and calculates the reasonable pillar width.The re-sults show that the pressure affect distance by using advance support stress theoretical calculation was consistent with the measured results.%察哈素煤矿3101工作面为大采高首采工作面，埋深较周围矿井深。掌握该工作面支撑压力分布规律，从而确定回采巷道超前支护距离和支护方式，对沿空留巷维稳提供了科学依据。本文运用极限平衡理论分析和现场实测的方法研究3101首采工作面支撑压力分布规律，并计算煤柱合理留设宽度。结果表明，支承压力理论计算的超前压力影响范围与现场实测结果基本吻合。