石宝铁矿露天转地下开采对边坡稳定性的影响研究
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摘要
为研究石宝铁矿露天转地下开采对边坡稳定性的影响,针对该矿目前露天开采现状及深部矿体赋存特征,提出了采用无底柱分段崩落法回收深部矿体的回采方法。采用数值分析的方法,重点分析了地下开采首采中段在覆盖层的作用下不同下降深度对露天矿边坡稳定的影响。数值分析结果表明,进行地下开采第3个分段时需增加覆盖层厚度。通过对南帮削坡再造覆盖层,既做到边坡减载压脚保证边坡稳定,又为无底柱分段崩落法提供了覆盖层下放矿的条件。
In order to study the influence of open-pit to underground mining of Shibao Iron Mine on slope stability,according to the present situation of open-pit mining and the occurrence characteristics of deep orebody in this mine,a method of recovering deep orebody by sublevel caving without bottom pillar is put forward.By using numerical analysis method,the influence of different descent depth on slope stability of open-pit mine under the action of overburden in the middle section of first mining in underground mining is emphatically analyzed.The results of numerical analysis show that the thickness of overburden should be increased when the third section of underground mining is carried out.By reconstructing the overburden by cutting the slope of the south side,it can not only ensure the stability of the slope by reducing the load of the slope,but also provide the overburden for the sublevel caving method without bottom pillar Conditions.
In order to study the influence of open-pit to underground mining of Shibao Iron Mine on slope stability,according to the present situation of open-pit mining and the occurrence characteristics of deep orebody in this mine,a method of recovering deep orebody by sublevel caving without bottom pillar is put forward.By using numerical analysis method,the influence of different descent depth on slope stability of open-pit mine under the action of overburden in the middle section of first mining in underground mining is emphatically analyzed.The results of numerical analysis show that the thickness of overburden should be increased when the third section of underground mining is carried out.By reconstructing the overburden by cutting the slope of the south side,it can not only ensure the stability of the slope by reducing the load of the slope,but also provide the overburden for the sublevel caving method without bottom pillar Conditions.
引文
[1] 孙玉科,杨志法,丁恩保,等.中国露天铁矿边坡稳定性研究[M].北京:中国科学技术出版社,1999.
[2] 徐长佑.露天转地下开采[M].武汉:武汉工业大学出版社,1989.
[3] 刘杰,赵兴东,路增祥.露天转地下开采方案优化及边坡稳定性分析[J].东北大学学报(自然科学版),2013,34(9):1327-1329.
[4] 解世俊.金属矿床地下开采[M].北京:冶金工业出版社,2014.
[5] 郭金峰.金属矿山露天转地下开采的发展现状与对策[J].云南冶金,2003(1):7-10.
[6] 裴尼松,廖鑫,罗勇,等.露天转地下开采覆盖层安全性判定研究[J].中国金属通报,2017(9):133-136.
[7] 韩放,谢芳,王金安.露天转地下开采岩体稳定性三维数值模拟[J].北京科技大学学报,2006(6):509-514.
[8] 康永红,陈峰,武尚荣,等.露天转地下开采对露采边坡稳定性影响分析[J].中国矿山工程,2017,46(3):28-31.
[2] 徐长佑.露天转地下开采[M].武汉:武汉工业大学出版社,1989.
[3] 刘杰,赵兴东,路增祥.露天转地下开采方案优化及边坡稳定性分析[J].东北大学学报(自然科学版),2013,34(9):1327-1329.
[4] 解世俊.金属矿床地下开采[M].北京:冶金工业出版社,2014.
[5] 郭金峰.金属矿山露天转地下开采的发展现状与对策[J].云南冶金,2003(1):7-10.
[6] 裴尼松,廖鑫,罗勇,等.露天转地下开采覆盖层安全性判定研究[J].中国金属通报,2017(9):133-136.
[7] 韩放,谢芳,王金安.露天转地下开采岩体稳定性三维数值模拟[J].北京科技大学学报,2006(6):509-514.
[8] 康永红,陈峰,武尚荣,等.露天转地下开采对露采边坡稳定性影响分析[J].中国矿山工程,2017,46(3):28-31.