大采高孤岛工作面沿空护巷煤柱合理宽度研究  

Reasonable Width of Coal Pillars for Gob-side Entry Supportin Island Working Face with Large Mining Height

作　　者：于齐场 侯祥坤 李鑫 YU Qichang;HOU Xiangkun;LI Xin(Zhuanlongwan Coal Co.,Ltd.,Ordos 017205,China)

机构地区：[1]鄂尔多斯市转龙湾煤炭有限公司,内蒙古鄂尔多斯017502

出　　处：《山西煤炭》2024年第3期27-36,共10页Shanxi Coal

摘　　要：针对转龙湾煤矿二采区孤岛工作面沿空掘进巷道煤柱留设难题,采用数值模拟,对2号工作面运输巷在不同煤柱宽度下煤柱应力分布和围岩变形程度进行了研究,最终确定了合理的煤柱宽度为19 m,并对合理的煤柱宽度进行围岩稳定性验证。结果表明,在煤柱宽度为19 m的范围内,可以有效控制围岩变形,实现巷道围岩的稳定性。该研究成果对沿空掘巷煤柱合理宽度的确定及巷道围岩控制技术的应用具有重要的理论意义和参考价值。Aiming at the problem of retaining coal pillar for the gob-side entry in the isolated island working face of the second mining area of Zhuanlongwan Mine,the stress distribution of coal pillars and the deformation of surrounding rock in the transportation roadway of No.2 working face under different pillar widths were studied by numerical simulation.The reasonable coal pillar width was finally determined to be 19 m,and the reasonable coal pillar width verified the stability of the surrounding rock.The results show that the deformation of the surrounding rock can be effectively controlled and the stability of the surrounding rock can be realized within the range of 19 m of the coal pillar width.The findings have important theoretical significance and reference value for the determination of the reasonable width of the coal pillar in the gob-side entry and the application of the roadway surrounding rock control technology.

关 键 词：沿空巷道 煤柱宽度 应力演化 塑性区宽度 

分 类 号：TD353[矿业工程—矿井建设]