厚煤层回采工作面区段煤柱的合理宽度

On Reasonable Width of Section Coal Pillar in Thick Coal Working Face

回采工作面区段煤柱宽度的合理性直接影响着采掘工作面的顶板控制及安全生产,是进行工作面布置和支护设计的重要依据.为确定福达煤矿合理的区段煤柱宽度,本文根据矿井的工程地质和开采条件,通过对煤柱内弹塑性区的理论分析,计算出煤柱的留设宽度,并结合数值模拟的方法,分析了不同尺寸煤柱下应力分布和破坏范围.通过煤柱留设后的矿压实测,最终确定了福达煤矿回采工作面合理的区段煤柱宽度为19m.

The reasonable width of the coal pillar in the mining face directly affects the roof control and safety production in extracting coal face, which is the important basis for working face layout and supporting design. In order to determine the reasonable width of the pillar in Fuda Mine, by analyzing the engineering geological and mining conditions, the paper calculates the width of the protection pillar through the theoretical analysis of the elastoplastic zone in the coal pillar. With the method of numerical simulation, the stress distribution and damage zone range of coal pillar size in different pillar size are analyzed. Finally, through the mineral pressure observation after the coal pillar setting, it is determined that the reasonable width of the coal pillar in Fuda Mine is 19 m.