自然崩落法底部结构应力状态研究
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摘要
以普朗铜矿为研究背景,通过分析拉底工程在自然崩落法中的重要性,应用FLAC3D数值模拟软件,研究拉底过程中,逐渐增大拉底推进线尺寸时,底部结构应力状态的分布情况,得到一个聚矿槽开挖距拉底推进线较有利的距离。并且,在实测地应力的基础上,通过改变水平构造应力值,研究了4种不同应力状态下,底部结构的应力分布情况,分别得出有利于矿石崩落及底部结构稳定的应力状态。该研究成果将对自然崩落法矿山的采矿工艺设计和安全生产具有指导作用。
With the Pulang copper mine as background,the importance of the undercutting project in natural caving was analyzed.With the use of FLAC3 Dnumerical simulation software,the distribution of the bottom structural stress state is studied during the process of undercutting,with the size of the undercutting line gradually increasing.A more favorable distance from the undercutting line to the poly trough was obtained.On the basis of the measured ground stress,and through changing the horizontal structural stress values,the stress distribution of the bottom structure were described under four different stresses.The stress state which is beneficial to the ore caving and the stability of the bottom structure was determined.The research result can provide a guide for designing mining process in mine with caving method and safety production.
With the Pulang copper mine as background,the importance of the undercutting project in natural caving was analyzed.With the use of FLAC3 Dnumerical simulation software,the distribution of the bottom structural stress state is studied during the process of undercutting,with the size of the undercutting line gradually increasing.A more favorable distance from the undercutting line to the poly trough was obtained.On the basis of the measured ground stress,and through changing the horizontal structural stress values,the stress distribution of the bottom structure were described under four different stresses.The stress state which is beneficial to the ore caving and the stability of the bottom structure was determined.The research result can provide a guide for designing mining process in mine with caving method and safety production.
引文
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[5]马春德,李夕兵,等.自然崩落法矿山深部地应力场分布规律的测试研究[J].矿冶工程,2010,30(6):10-14.Ma Chunde,Li Xibing,et al.Research on in-situ stress distribution in deep mine with natural caving method[J].Mining and Metallurgical Engineering,2010,30(6):10-14.
[2]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.Yuan Haiping,Cao Ping.Present status of block caving development and its application prospect in China[J].Metal Mine,2004(8):25-28.
[3]张传信,吴少华.自然崩落法底部结构稳定性的研究[J].有色矿冶,1995(4):20-24.Zhang Chuanxin,Wu Shaohua.Study on the bottom structure stability of natural caving method[J].Nonferrous Mining and Metallurgy,1995(4):20-24.
[4]丁亦敏.自然崩落法底部结构应力分布的研究[J].有色金属:矿山部分,1995(3):20-25.Ding Yimin.Study on the stress distribution of the bottom structure of natural calving method[J].Nonferrous Metals:Mine Section,1995(3):20-25.
[5]马春德,李夕兵,等.自然崩落法矿山深部地应力场分布规律的测试研究[J].矿冶工程,2010,30(6):10-14.Ma Chunde,Li Xibing,et al.Research on in-situ stress distribution in deep mine with natural caving method[J].Mining and Metallurgical Engineering,2010,30(6):10-14.