缓倾斜厚煤层沿空掘巷煤柱宽度优化研究  

Study on optimization of coal pillar width in gob-side entry driving inslowly sloping thick coal seam

作　　者：许起 秦宇鹏 王文[2] 吴怡恒 赵光 Xu Qi;Qin Yupeng;Wang Wen;Wu Yiheng;Zhao Guang(Shanxi Huoerxinhe Coal Mining Company Ltd.,Changzhi 046699,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]山西霍尔辛赫煤业有限责任公司,山西长治046699 [2]河南理工大学能源科学与工程学院,河南焦作454003

出　　处：《能源与环保》2023年第6期248-253,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：河南省高校科技创新团队及人才项目(22IRTSTHN005,23HASTIT011)。

摘　　要：为研究缓斜厚煤层沿空掘巷小煤柱留设优化问题,以霍尔辛赫煤矿3208工作面为研究背景,基于内外应力场理论得出缓斜煤层应力降低区的论理计算方法,利用FLAC~(3D)分别模拟煤柱在不同宽度下的应力分布特征和变形规律,结合现场实测结果确定煤柱的合理尺寸。研究结果表明:内应力场理论得出煤柱宽度小于10.8 m,应力场数值模拟得出煤柱的合适宽度在6~8 m,现场实测得出煤柱宽度应小于7.5 m,综合确定现场沿空掘巷煤柱宽度为7 m。In order to study the problem of retaining narrow coal pillars in gob-side entry driving in gently inclined coal seams,the 3208 working face of Huoerxinhe Mine was taken as the research background.Based on the theory of internal and external stress fields,the theoretical calculation method of stress reduction zone in gently inclined coal seams was obtained.FLAC 3D was used to simulate the stress distribution characteristics and deformation law of coal pillars under different widths,and the reasonable size of coal pillars was determined based on the field measurement results.The results show that the width of coal pillar is less than 10.8m according to the theory of internal stress field,the suitable width of coal pillar is 6~8 m according to the numerical simulation of stress field,and the width of coal pillar should be less than 7.5 m according to the field measurement.

关 键 词：缓倾斜煤层 沿空掘巷 小煤柱 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]