自然崩落法超前拉底数值模拟研究
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- 英文论文题名：Numerical Simulation Study of Advancing Undercutting in Block Caving Method
- 论文作者：梁江波 ; 刘华武 ; 冯兴隆
- 英文论文作者：LIANG Jiangbo ; LIU Huawu ; FENG Xinlong ; Yunnan Diqing Non-Ferrous Metals Co. ; Ltd.
- 年：2016
- 作者机构：云南迪庆有色金属有限责任公司;
- 论文关键词：自然崩落法 ; 底部结构稳定性 ; 模拟分析 ; 超前拉底
- 英文论文关键词：Block caving ; stability of bottom structure ; simulation and analysis ; advancing undercutting
- 会议召开时间：2016-08-01
- 会议录名称：云南铜业（集团）有限公司、云南省有色金属学会第九届矿山技术论文发布会论文集
- 语种：中文
- 分类号：TD853.36
- 学会代码：YNKX
- 会议名称：云南铜业（集团）有限公司、云南省有色金属学会第九届矿山技术论文发布会
- 会议地点：中国云南楚雄
- 主办单位：云南铜业（集团）有限公司、云南省有色金属学会
- 学会名称：云南省科学技术协会
- 页数：8
- 文件大小：822k
- 原文格式：D
- 会议级别：地方
摘要
自然崩落法是在出矿水平上部拉开一定空间,矿岩在自重应力或构造应力的作用下自然崩落,并通过拉底水平底部的聚矿槽放出。拉底与聚矿槽施工的先后顺序直接影响着底部结构稳定性。假设拉底超前聚矿槽进行,运用模拟软件FLAC3D建立数值模型,模拟分析超前拉底条件下,底部结构的应力、塑性区变化情况。研究表明超前拉底有助于底部结构的稳定。
Block caving method is a mining method which some space is developed above the production level and the ore-rock cave naturally under the effect of gravity and tectonic stress. The ore-rock is drawed through the drawbell under the undercutting level. The construction sequence of undercutting and drawbell affect the stability of bottom structure directly. Assuming that undercutting is ahead of drawbell construction, we establish a numerical model with FLAC3D and simulate the stress and plastic zone in bottom structure. The research showed that advancing undercutting is helpful to the stability of bottom structure.
Block caving method is a mining method which some space is developed above the production level and the ore-rock cave naturally under the effect of gravity and tectonic stress. The ore-rock is drawed through the drawbell under the undercutting level. The construction sequence of undercutting and drawbell affect the stability of bottom structure directly. Assuming that undercutting is ahead of drawbell construction, we establish a numerical model with FLAC3D and simulate the stress and plastic zone in bottom structure. The research showed that advancing undercutting is helpful to the stability of bottom structure.
引文
[1]袁海平,曹平.我国自然崩落法发展现状与应用展望[J].金属矿山.2004(8):25-28.
[2]陈宗基.应力释放对开挖工程稳定性的重要影响[J].岩石力学与工程学报,1992,11(1):1-10.
[3]彭文斌.FLAC3D实用教程[M].北京:机械工业出版社.2008.
[4]Hoek,Brown.The Hoek-Brown failure criterion—a 1998 update[C]//Proc.15th Canadian Rock Mech.Toronto:University of Toronto Press,1988:31-38.
[5]Hoek,Carranza-Torres,Corkum.Hoek-Brown failure criterion:2002 ed[C]//Proc of the 5th North American Rock Mechanics Symposium and 17th Tunneling Association of Canada Conference.Toronto:University of Toronto Press,2002:267-271.
[2]陈宗基.应力释放对开挖工程稳定性的重要影响[J].岩石力学与工程学报,1992,11(1):1-10.
[3]彭文斌.FLAC3D实用教程[M].北京:机械工业出版社.2008.
[4]Hoek,Brown.The Hoek-Brown failure criterion—a 1998 update[C]//Proc.15th Canadian Rock Mech.Toronto:University of Toronto Press,1988:31-38.
[5]Hoek,Carranza-Torres,Corkum.Hoek-Brown failure criterion:2002 ed[C]//Proc of the 5th North American Rock Mechanics Symposium and 17th Tunneling Association of Canada Conference.Toronto:University of Toronto Press,2002:267-271.