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金属矿山 ›› 2008, Vol. 38 ›› Issue (11): 20-24.

• 采矿工程 • 上一篇    下一篇

动静组合载荷作用下岩石破碎损伤断裂力学分析

谢世勇1,卢花2,赵伏军3   

  1. 1.赣州有色冶金研究所;2.江西省南康中学;3.湖南科技大学
  • 收稿日期:2008-09-10 出版日期:2008-11-15 发布日期:2011-07-12
  • 基金资助:

    湖南省自然科学基金项目(编号:06JJ20094),湖南科技大学科学研究基金项目(编号:E55118)。

Mechanical Analysis of the Damage and Fracture of Rock Fragmentation Under Combined Dynamic and Static Loads

Xie Shiyong1,Lu Hua2,Zhao Fujun3   

  1. 1.Ganzhou Nonferrous Metallurgy Research Institute;2.Nankang Middle School in Jiangxi Province;3.Hunan University of Science and Technology
  • Received:2008-09-10 Online:2008-11-15 Published:2011-07-12

摘要: 分析了动静组合载荷破岩的载荷-侵深特征曲线,确定组合载荷合理的加载点是在岩石已发生体积破碎、岩屑已崩出、压实体又得到充分压实之后。对岩石在动静组合载荷作用下破碎进行了损伤断裂力学分析,得到在一定范围内加大静压力和冲击力可以使破碎坑体积很快增加,从而提高破岩效率;在预加静载荷使岩石发生体积破碎之后再施加冲击载荷,此时岩石破碎效果最好的结论。

关键词: 动静组合载荷, 岩石碰碎, 损伤断裂力学

Abstract: The paper analyzes the load-fracturing depth cure of rock fragmentation under combined dynamic and static loads and concludes that the reasonable loading point of the combined loads is at a time when there is a rock volumetric fracture, debris outbreak and then a sufficient compression of the original compacted body. A fracture and damage mechanics analysis is made of the rock fragmentation under dynamic-static combined loads. It is concluded that broken volume will increase rapidly with an increase in the static pressure and impact in certain scope, thereby enhancing the efficiency of rock fragmentation; and the best effect of rock fragmentation will occur when an impact load is applied after a volume fracture due to the pre-static load.

Key words: Dynamic-static combined loads, Rock fragmentation, Damage and fracture mechanics