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黄金科学技术 ›› 2017, Vol. 25 ›› Issue (4): 81-86.doi: 10.11872/j.issn.1005-2518.2017.04.081

• 采选技术与矿山管理 • 上一篇    下一篇

水平采空区群条件下矿柱回采爆破位置研究

白朝阳1,王国伟2 *,张鹏1,刘拴平1   

  1. 1.陕西太白黄金矿业有限责任公司,陕西  宝鸡   721607;
    2.华南理工大学安全科学与工程研究所,广东  广州   510640
  • 收稿日期:2017-02-16 修回日期:2017-05-24 出版日期:2017-08-30 发布日期:2017-10-30
  • 通讯作者: 王国伟(1990-),男,河南周口人,硕士研究生,从事资源安全与灾害防治研究工作.merkabei@126.com
  • 作者简介:白朝阳(1990-),男,陕西渭南人,助理工程师,从事矿山采矿工程方面的研究工作。842898476@qq.com
  • 基金资助:

    国家自然科学基金面上项目“复杂破碎金矿高效开采工艺技术”(编号:2012BAB08B02)资助

Research on Pillaring Blasting Location Under Level Gob Group Conditions

BAI Zhaoyang1,WANG Guowei2,ZHANG Peng1,LIU Shuanping1   

  1. 1.Shaanxi Taibai Gold Mining Ltd.,Co.,Baoji    721607,Shaanxi,China;
    2.Institute of Safety Science and Engineering,South China University of Technology,Guangzhou   510640,Guangdong,China
  • Received:2017-02-16 Revised:2017-05-24 Online:2017-08-30 Published:2017-10-30

摘要:

为确定水平采空区群条件下矿柱爆破回采的最佳爆破位置,结合陕西某大型金矿残矿回采工程,采用FLAC3D数值模拟软件,对水平采空区群条件下“锥形”、“腰形”和“倒锥形”3种矿柱回采方案进行模拟研究。结果表明:空区群内待回采矿柱X向的位移变化为“腰形”方案>“锥形”方案>“倒锥形”方案;“腰形”削柱法对2#、3#和4#空区顶板应力影响跨度比分别为50.8%、68.5%和28.5%,均小于其他方案,能够保证空区群的稳定性,说明“腰形”削柱法为矿柱回采最佳爆破位置。研究结果还表明,爆破回采矿柱过程中有塑性区出现,且以拉伸破坏为主,需采取适当的加固措施。

关键词: 矿柱回采, 削柱法, 爆破位置, 采空区群, FLAC3D软件, 数值模拟, 应力分布

Abstract:

In order to determine the best blasting location of pillar blasting under level goaf group conditions,combined with a large gold ore mining engineering in Shaanxi Province,this article adopts the numerical simulation software FLAC3D,and three pillar stoping schemes of“cone”,“waist” and “inverted cone”are simulated under the condition of level goaf group.The results show that displacement change of X direction of waiting pillar in goaf group is “waisted” program> “cone” program>“inverted cone” program,the influence span ratio of “waist”cut column method for 2 #,3 # and 4# cavity roof stress is 50.8%,68.5% and 28.5% respectively,are less than other schemes,to ensure stability of goaf group,it shows that“waist” cutting column method is the best blasting position of pillar stoping.The results also show that there is a plastic area in the process of blasting pillar,and tensile failure is the main factor,so proper reinforcement measures should be taken.

Key words:  pillar mining, cutting column method, blasting location, goaf group, FLAC3D software, numerical simulation, stress distribution

中图分类号: 

  • TD853

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