极近距离煤层开采下煤层采场顶板破断规律  

Roof Breaking Law of Coal Seam Stope under Extremely Close Coal Seam Mining

作　　者：郑英建 ZHENG Ying-jian(Xuyong No.1 Coal Mine Co.,Ltd.,Sichuan Furong Group,Luzhou 646400,China)

机构地区：[1]四川芙蓉集团叙永一矿煤业有限公司,四川泸州646400

出　　处：《煤炭技术》2021年第6期59-63,共5页Coal Technology

摘　　要：以叙永一矿极近距离薄煤层开采为工程背景,采用理论分析、数值模拟和现场实测的研究方法,提出了煤层群开采层间距的划分方法;并利用顶板岩梁理论推导了C20煤层直接顶断裂步距表达式;研究揭示了极近距离煤层工作面采场顶板破断规律;利用现场实测矿压数据较好地验证了理论分析和数值模拟结果。研究结果可以为极近距离煤层开采安全高效开采提供参考。Takes the ultra-long working face of extremely close thin coal seam group in Xuyong No.1 coal mine as the engineering background,and adopts the research methods of theoretical analysis,numerical simulation and field measurement,and puts forward the division method of mining layer spacing of coal seam group.And the expression of the direct roof fracture step distance of C20 coal seam is derived by using the roof rock beam theory;the mine pressure distribution law of ultra-long working face in very close coal seam was analyzed by numerical simulation.The theoretical analysis and numerical simulation results are well verified by field measured data.The research results can provide theoretical guidance for safe and efficient mining of extremely close coal seam.

关 键 词：极近距离薄煤层群 顶板破断规律 采场矿压分布 

分 类 号：TD353[矿业工程—矿井建设]