自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第49卷    第10期    总第290期    2018年10月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2018)10-2576-08
深部高应力空区拱架效应与采场结构尺寸的相依性
姜立春1, 2,王玉丹2,赵奎3

(1. 华南理工大学 土木与交通学院,广东 广州,510640;
2. 华南理工大学 安全科学与工程研究所,广东 广州,510640;
3. 江西理工大学 资源与环境工程学院,江西 赣州,341000
)

摘 要: 基于采场顶板围岩破坏形式,构建空区顶板岩拱力学模型;利用无铰拱理论计算岩拱内力,选取深部采场跨度及矿柱宽度等因素作为相依性分析指标,推导采场跨度(l)及矿柱宽度(d)关于拱轴系数(m)及拱高(h)的数学表达式。以某深部高应力金属矿空区为研究对象,分析采空区拱架效应与其结构尺寸(采场跨度(l)及矿柱宽度(d))依存关系,并对顶板位移进行150 d监测。研究结果表明:当d一定时,l随着m减小而增大;当l一定时,d随着m增大而增大;当m=2,h=3 m,d=7 m时,矿柱合理间距为31 m;在150 d内,顶板最大位移变形在6 mm之内,未发生垮塌现象。该研究结果可为深部高应力条件下釆场结构尺寸设计提供依据。

 

关键字: 深部开采;高应力;无铰拱;拱轴系数;采场跨度

Dependence between goaf arching effect and its structure size under high stress
JIANG Lichun1, 2, WANG Yudan2, ZHAO Kui3

1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640,China;
2. Institute of Safety Science and Engineering, South China University of Technology, Guangzhou 510640,China;
3. Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

Abstract:Based on the analysis of the destroying of surrounding rock of the roof, a roof-arch and rock-mechanical model was built. The internal force was calculated by fixed end arch algorithm. Deep mining goaf pillar width span structure and other factors were selected as dependency analysis index, and expressions of span(l) and pillar width(d) related to coefficient of arch axle(m) and height(h) of arch were deduced. Taking large metal deep mine under high stress of the stope as the object, relationship between goaf arch effect and structure size(l and d) was analyzed. The roof displacements were monitored in 150 d. The results show that when d is definite, l decreases with the decrease of m. When l is definite, d increases with the increase of m. The reasonable pillar spacing is 31 m when m=2, h=3 m and d=7 m. The max roof displacement deformation is less than 6 mm, and no collapse happens, while the stope of roof is safe during 150 d.It is reasonable to design a goaf structure under high stress at deep mine.

 

Key words: deeping mining; high stress; hingeless arch; arch axis coefficient; pillar spacing

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号