基于FLAC^(3D)数值模拟的近距离煤层工作面布置应力分布研究  

Study on Stress Distribution of Close Seam Face Layout Based on FLAC^(3D)Numerical Simulation

作　　者：张海峰 Zhang Haifeng(Inner Mongolia Zhongtai Energy Co.,Ltd.,Inner Mongolia,301700)

机构地区：[1]内蒙古仲泰能源有限公司,内蒙古301700

出　　处：《当代化工研究》2024年第11期122-124,共3页Modern Chemical Research

摘　　要：近距离煤层群在开采过程中会引起回采空间周围岩层应力重新分布,其上、下煤层工作面的位置关系与回采巷道布置对实现工作面安全开采有重要影响。以内蒙古伊泰煤炭股份有限公司纳林庙煤矿二号井(简称“伊泰纳二井”)邻近的4-1煤层与4-2煤层为研究对象,采用FLAC^(3D)数值模拟对不同的煤层工作面布置方式及联合开采方式进行综合研究,分析不同布置方案下围岩应力的分布特征。研究结果表明:工作面巷道采用内错布置和重叠布置方式时煤柱支承能力较好,重叠布置较内错布置节约10 m煤柱,因此采用重叠布置方式;下煤层工作面切眼与回撤通道布置在上煤层工作面内错距离10 m处;压力高峰区随着工作面滞后距离的增加逐渐偏离,滞后80 m时,两工作面超前支承压力完全分离,因此下煤层滞后上煤层距离应大于80 m。In the mining process,the close coal seam group will cause the redistribution of rock stress around the mining space,and the position relationship of the working face of the upper and lower coal seam and the layout of the mining roadway have an important influence on the safe mining of the working face.Taking the 4-1 coal seam and 4-2 coal seam adjacent to the No.2 well of Nalinmiao Coal Mine of Inner Mongolia Yitai Coal Co.,Ltd.("Yitaina No.2 Well")as the research object,FLAC^(3D) numerical simulation was used to conduct comprehensive research on different coal seam working face layout and joint mining mode,and analyze the distribution characteristics of surrounding rock stress under different layout schemes.The results show that the coal pillar supporting capacity is better when the internal dislocation layout and overlapping layout are adopted,and the overlapping layout saves 10 m coal pillar compared with the internal dislocation layout,so the overlapping layout is adopted.The cutting hole and the withdrawal channel of the lower coal seam face are arranged at the wrong distance of 10 m in the upper coal seam face.The pressure peak area deviates gradually with the increase of the lag distance of the working face.When the lag distance of 80 m,the leading abutment pressure of the two working faces is completely separated,so the lag distance of the lower coal seam should be greater than 80 m.

关 键 词：近距离煤层群 工作面布置 联合开采 数值模拟 应力分布 

分 类 号：TD[矿业工程]