峁底煤矿10104工作面区段煤柱合理尺寸研究

Reasonable Size of Sectional Coal Pillars in 10104 Working Face of Maodi Coal Mine

以峁底煤矿10104工作面为研究背景,通过建立力学模型对区段煤柱的宽度进行理论计算,并使用FLAC3D数值模拟软件,对不同宽度的区段煤柱进行数值模拟验算,分析不同宽度煤柱的塑性区破坏情况,对不同宽度煤柱的稳定性进行评估,得到合理的区段煤柱尺寸。结果表明,10104工作面合理的煤柱宽度尺寸为30m;巷道顶底板最大移近量为190mm,两帮最大移近量为230mm。现场监测结果表明区段煤柱的宽度设计是合理正确的。

Taking the 10104 working face of Maodi Coal Mine as the research background,the theoretical calculation on the width of sectional coal pillars is carried out by establishing a mechanical model;FLAC 3D numerical simulation software is used to perform numerical simulation on coal pillars of different widths;the stability of the coal pillars is evaluated on the analysis of plastic zone destruction.Finally,reasonable size of section coal pillars is obtained.The results show that the reasonable coal pillar width of 10104 working face is 30 meters;the maximum convergence of the roof and floor is 190 mm and the maximum convergence of the two walls 230 mm.The on-site monitoring results show that the width design of the section coal pillars is reasonable and correct.