轮廓爆破下柱状节理岩体开裂过程的数值模拟

朱亮; 陈明; 卢文波; 严鹏

doi:10.11883/1001-1455(2015)04-0555-06

轮廓爆破下柱状节理岩体开裂过程的数值模拟

doi: 10.11883/1001-1455(2015)04-0555-06

朱亮^1,,
陈明^{1, 2, ,},
卢文波^{1, 2},
严鹏^{1, 2}

1.
武汉大学水资源与水电工程科学国家重点实验室，湖北武汉 430072
2.
武汉大学水工岩石力学教育部重点实验室，湖北武汉 430072

基金项目: 国家自然科学基金项目(51279146)；国家重点基础研究发展计划(973计划)项目(2011CB013501)

详细信息

作者简介:
朱亮(1990-), 男, 硕士研究生

通讯作者:
陈明, whuchm@yahoo.com.cn

中图分类号: O383
计量
- 文章访问数: 2648
- HTML全文浏览量: 246
- PDF下载量: 608
- 被引次数: 0
出版历程
- 收稿日期: 2013-01-10
- 修回日期: 2014-05-06
- 刊出日期: 2015-07-25

Numerical simulation on the cracking process of columnar jointed rock masses in contour blasting

Zhu Liang^1
,,
Chen Ming^{1, 2
, ,},
Lu Wen-bo^{1, 2},
Yan Peng^{1, 2}

1.
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, China
2.
Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering, Ministry of Education, Wuhan University, Wuhan 430072, Hubei, China

摘要

摘要: 以白鹤滩水电站柱状节理玄武岩为研究对象，根据现场的柱状节理分布统计资料生成数值模型，模拟边坡开挖轮廓爆破下柱状节理岩体的开裂过程。结果表明：轮廓爆破时，柱状节理面对岩体裂纹的发展起着导向和控制作用；爆炸荷载作用下炮孔周围的节理面首先张开，然后裂缝沿着炮孔连心线附近的节理面扩展，最后形成贯通的由大量柱状节理面连接而成的裂缝；预裂爆破条件下，预裂缝宽度先增大后减少，最后达到稳定的开度，而且预裂爆破在柱状节理岩体中产生的裂纹范围比光面爆破产生的大。
- 爆炸力学 /
- 开裂过程 /
- 轮廓爆破 /
- 岩体 /
- 柱状节理
Abstract: With Baihetan columnar joints basalt as the research object, numerical model is generated according to the local distribution statistics. Based on numerical analysis, the cracking process of columnar jointed rock masses with the slope excavated by contour blasting is simulated. The results show that the columnar joints control and lead the generation of cracking in contour blasting. The joints around the hole are firstly opened by the explosion load. Then they extend along the joints near the defiled line of holes. Finally the cracks formed by a large number of columnar joints are connected. The process of the width of pre-splitting crack is that it reduces to stabile opening after increases under the condition of pre-splitting blasting. And the range of cracks in pre-splitting blasting is larger than these in smooth blasting.
- mechanics of explosion /
- cracking process /
- contour blasting /
- rock /
- columnar joints

HTML全文

图 1 光面爆破数值模拟

Figure 1. Numerical simulation model of smooth blasting

下载: 全尺寸图片幻灯片

图 2 欲裂爆破数值模拟

Figure 2. Numerical simulation model of pre-splitting blasting

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图 3 爆破荷载曲线

Figure 3. The history of blasting load

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图 4 光面爆破裂纹发展过程

Figure 4. Developing process of cracks in smooth blasting

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图 5 预裂爆破裂纹发展过程

Figure 5. Developing process of cracks in presplitting blasting

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图 6 轮廓爆破细部图

Figure 6. Detail drawing of contour blasting

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图 7 光面爆破裂纹发展曲线

Figure 7. Developing curves of the crack in smooth blasting

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图 8 预裂爆破预裂缝发展曲线

Figure 8. Developing curves of precracking in presplitting blasting

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表 1 岩石力学参数

Table 1. Mechanical parameters of the rock

ρ/(kg·m^-3) E/GPa μ p_R/MPa α/(°) σ_s/MPa

2 800 60 0.2 0.9 45 5

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表 2 节理面力学参数

Table 2. Mechanical parameters of the joint mass

K_n/GPa K_t/GPa α_i/(°) p_J/MPa σ_t/MPa

52.9 12.8 28 0.75 0.78

下载: 导出CSV

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