缓倾斜近距离煤层群重复开采“两带”高度研究  

Study on Height of"Two Zones"in Repeated Mining of Gentle Dip Close-distance Coal Seam Groups

作　　者：郭进[1,2] GUO Jin(State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China;School of Resources and Safety Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044 [2]重庆大学资源与安全学院,重庆400044

出　　处：《煤炭技术》2024年第10期81-86,共6页Coal Technology

摘　　要：以四川省石屏一矿缓倾斜近距离开采工作面为工程背景,针对重复开采中缓倾斜近距离煤层的“两带”高度发育问题,采用FLAC^(3D)数值模拟与经验公式计算的方法进行研究。对工作面开采之后引起上覆岩层塑性区的变化特征进行了分析;确定了重复采动下“两带”的高度;并与经验公式进行对比验证;得出在重复采动情况下“两带”高度并不是简单的相加,而是存在一种叠加效应。通过该研究,进一步探索了缓倾斜近距离煤层群重复开采情况下“两带”高度的发育问题,为缓倾斜近距离煤层群安全开采提供了依据。Using the gentle dip close-distance mining face in the Shiping No.1 mine in Sichuan province as the engineering background,the research employs numerical simulation with FLAC^(3D) and empirical formula calculations to investigate the development of"two zones"height in gentle dip closedistance coal seams during repeated mining.The changes in the plastic zone of overlying strata caused by face mining are analyzed,the height of"two zones"under repeated mining is determined,and a comparison and validation with empirical formulas are conducted.The results indicate that,under repeated mining,the height of"two zones"does not simply add up but exhibits a stacking effect.This research further explores the development of"two zones"height in repeated mining of gentle dip closedistance coal seam groups,providing a basis for the safe mining of such coal seam groups.

关 键 词：缓倾斜 近距离煤层群 “两带”高度 数值模拟 

分 类 号：TD325[矿业工程—矿井建设]