岩石钻孔爆破粉碎区计算模型的改进

冷振东 卢文波 陈明 严鹏 胡英国

冷振东, 卢文波, 陈明, 严鹏, 胡英国. 岩石钻孔爆破粉碎区计算模型的改进[J]. 爆炸与冲击, 2015, 35(1): 101-107. doi: 10.11883/1001-1455(2015)01-0101-07
引用本文: 冷振东, 卢文波, 陈明, 严鹏, 胡英国. 岩石钻孔爆破粉碎区计算模型的改进[J]. 爆炸与冲击, 2015, 35(1): 101-107. doi: 10.11883/1001-1455(2015)01-0101-07
Leng Zhen-dong, Lu Wen-bo, Chen Ming, Yan Peng, Hu Ying-guo. Improved calculation model for the size of crushed zone around blasthole[J]. Explosion And Shock Waves, 2015, 35(1): 101-107. doi: 10.11883/1001-1455(2015)01-0101-07
Citation: Leng Zhen-dong, Lu Wen-bo, Chen Ming, Yan Peng, Hu Ying-guo. Improved calculation model for the size of crushed zone around blasthole[J]. Explosion And Shock Waves, 2015, 35(1): 101-107. doi: 10.11883/1001-1455(2015)01-0101-07

岩石钻孔爆破粉碎区计算模型的改进

doi: 10.11883/1001-1455(2015)01-0101-07
基金项目: 国家自然科学基金项目(51125037,51279135);国家重点基础研究发展计划(973计划)项目(2011CB013501);高等学校博士学科点专项科研基金项目(20110141110026)
详细信息
    作者简介:

    冷振东(1989—), 男, 博士研究生

    通讯作者:

    卢文波, wblu@whu.edu.cn

  • 中图分类号: O383.1;TV554

Improved calculation model for the size of crushed zone around blasthole

  • 摘要: 为了研究炮孔周围岩石的破坏机理,准确预测粉碎区的范围,提出了一种计算钻孔爆破粉碎区范围的改进模型。该四分区模型考虑了破裂区内侧的环向压应力和炮孔空腔膨胀的影响,假定粉碎区为丧失了内聚力但仍具有内摩擦力的散体介质。采用弹塑性力学理论推导了柱状装药起爆条件下的岩石钻孔爆破粉碎区半径公式。计算结果表明,岩石钻孔爆破粉碎区范围通常为1.2~5.0倍炮孔半径,不同种类岩石的粉碎区范围差别很大。与其他计算模型相比,本模型的计算结果与实验数据更吻合。
  • 图  1  传统模型和改进模型的岩石钻孔爆破破坏分区示意图

    Figure  1.  Image of the damage zones surrounding a blasthole under blasting in traditional and improved calculation model

    图  2  不同计算模型的粉碎区计算结果b*m和实验数据*m对比

    Figure  2.  Comparison of different models with full scale blasting experiments

    表  1  各种岩石的物理力学参数

    Table  1.   Physico-mechnical properties of different rocks

    岩石类型 [σc]/MPa [σt]/MPa E/GPa θ/(°) ρm/(kg·m-3) ν
    石英岩 250 20 70 48 2 670 0.26
    花岗岩 150 15 50 50 2 670 0.24
    石灰岩 60 6 35 43 2 500 0.23
    粉砂岩 40 3 30 41 2 600 0.22
    下载: 导出CSV

    表  2  不同粉碎区范围计算模型的计算结果对比

    Table  2.   Comparison of crushing zone models in full scale blasting conditions

    岩石
    类型
    装药
    结构
    炸药
    类型
    b*m/rb
    Il’yushin
    模型
    Szuladzinski
    模型
    Djordjevic
    模型
    Kanchibotla
    模型
    Esen
    模型
    戴俊
    模型
    改进
    模型
    石英岩 耦合 铵油 5.08 1.68 1.74 3.42 1.00 1.54 1.16
    乳化 5.45 1.81 2.14 4.20 1.04 1.79 1.31
    花岗岩 耦合 铵油 5.81 2.17 2.01 4.41 1.06 1.79 1.36
    乳化 6.22 2.34 2.48 5.42 1.39 2.08 1.55
    K=3 Gurit 2.91 1.79 1.00 1.76 1.00 1.00 1.00
    石灰岩 耦合 铵油 9.04 3.43 3.18 6.97 1.71 2.71 2.18
    乳化 9.69 3.70 3.91 8.58 2.25 3.12 2.52
    粉砂岩 耦合 铵油 10.76 4.20 4.50 8.54 2.11 3.19 2.76
    乳化 11.53 4.53 5.54 10.50 2.77 3.67 2.95
    注:K为径向不耦合系数,K=炮孔直径\装药直径。
    下载: 导出CSV
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出版历程
  • 收稿日期:  2013-05-03
  • 修回日期:  2013-07-25
  • 刊出日期:  2015-01-25

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