Expansive pressure characteristic and borehole parameter analysis on large scale borehole soundless cracking

被引：0

作者：

Jiang, Nan ^{[1
]}

Xu, Quan-Jun ^{[1
]}

Long, Yuan ^{[1
]}

Liao, Yu ^{[1
]}

Lin, Wei ^{[2
]}

机构：

[1] College of Field Engineering, PLA University of Science and Technology, Nanjing, 210007, Jiangsu

[2] Nanjing Urban Construction Investment Holding (Group) Limited Corporation, Nanjing, 210002, Jiangsu

来源：

Baozha Yu Chongji/Explosion and Shock Waves | 2015年 / 35卷 / 04期

关键词：

Data fitting; Finite element method; Large scale borehole; Mechanics of explosion; Soundless cracking; Stress distribution;

D O I：

10.11883/1001-1455(2015)04-0467-06

中图分类号：

O24 [计算数学];

学科分类号：

070102 ;

摘要：

Large scale borehole soundless cracking is significantly different from traditional soundless cracking. Experiments were made to measure the expansive pressure of the soundless cracking agent (SCA) working in the boreholes of Ø40 mm and Ø100 mm. The different phenomenon between two sizes of cracking was compared and analyzed to show that the increase of borehole diameter could increase the expansive pressure and speed up the reaction. Based on the experimental data, finite element analysis was utilized to study the stress concentration and stress distribution around the borehole during the cracking process. Using the experimental data and the results of the finite element method, the elastic model of rock stress distribution was modified, and the stress distribution equations were proposed. The formulas of borehole arrangement parameters deduced by those equations are suitable for the actual engineering. ©, 2015, Explosion and Shock Waves. All right reserved.

引用

页码：467 / 472

页数：5

共 5 条

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