大孔径静态破碎膨胀压力特性及布孔参数分析

姜楠; 徐全军; 龙源; 廖瑜; 林卫

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

大孔径静态破碎膨胀压力特性及布孔参数分析

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

姜楠^1,,
徐全军¹,
龙源¹,
廖瑜¹,
林卫²

1.
解放军理工大学野战工程学院，江苏南京 210007
2.
南京市城建集团，江苏南京 210002

详细信息

作者简介:
姜楠(1988-), 男, 博士研究生, csmjiangnan@qq.com

中图分类号: O383
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- 被引次数: 0
出版历程
- 收稿日期: 2013-12-23
- 修回日期: 2014-03-06
- 刊出日期: 2015-08-10

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

1.
College of Field Engineering, PLA University of Science and Technology, Nanjing 210007, Jiangsu, China
2.
Nanjing Urban Construction Investment Holding (Group) Limited Corporation, Nanjing 210002, Jiangsu, China

摘要

摘要: 大孔径静态破碎与传统静态破碎有着显著的不同。利用电测法测量了直径40和100 mm钢管中的破碎剂膨胀压力和温度，对比分析了两种工况下的不同现象。实验表明，孔径的增加能够提高膨胀压力，加快反应速度。基于实验的数据，利用有限元方法计算了静态破碎时钻孔周围岩石介质中的应力分布。基于实验数据和有限元数值计算结果，使用数据拟合方法对静态破碎时岩石中的应力分布弹性模型进行修正，得到了应力分布方程。利用该方程推导的布孔参数计算公式，适合运用于实际工程之中。
- 爆炸力学 /
- 静态破碎 /
- 有限元方法 /
- 大孔径 /
- 数据拟合 /
- 应力分布
Abstract: 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 ∅40 mm and ∅100 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.
- mechanics of explosion /
- soundless cracking /
- finite element method /
- large scale borehole /
- data fitting /
- stress distribution

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图 1 实验装置示意图

Figure 1. Experiment devices

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图 2 膨胀压与温度时程曲线(∅40 mm)

Figure 2. SCA's expasive pressure and temperature(∅40 mm)

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图 3 膨胀压与温度时程曲线(∅100 mm)

Figure 3. SCA's expasive pressure and temperature(∅100 mm)

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图 4 模型网格及应力云图

Figure 4. Model mesh and stress counter

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图 5 应力分布曲线(∅40 mm)

Figure 5. Stress distribution curve (∅40 mm)

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图 6 应力分布曲线(∅100 mm)

Figure 6. Stress distribution curve (∅100 mm)

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表 1 钢管实验数据

Table 1. Experimental data of steel tube

d/mm η/% p_s/MPa T_m/℃ t₀/min

40 32 30 35 40

100 32 97 235 40

下载: 导出CSV

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