时序控制预裂爆破参数优化及应用

叶海旺; 唐可; 万涛; 王超; 雷涛; 李新平; C.M.Saliou

doi:10.11883/1001-1455(2017)03-0502-08

时序控制预裂爆破参数优化及应用

doi: 10.11883/1001-1455(2017)03-0502-08

叶海旺^{1, 2},
唐可¹,
万涛¹,
王超¹,
雷涛^{1, 2, ,},
李新平³,
C.M.Saliou¹

1.
武汉理工大学资源与环境工程学院，湖北武汉 430070
2.
武汉理工大学矿物资源加工与环境湖北省重点实验室，湖北武汉 430070
3.
武汉理工大学土木与建筑工程学院，湖北武汉 430070

基金项目:

国家自然科学基金项目 51274157

中央高校基本科研业务费专项基金项目 2015IVA028

详细信息

作者简介:
叶海旺 (1971-)，男，博士，副教授

通讯作者:
雷涛，leitao539@163.com

中图分类号: O381
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- 被引次数: 0
出版历程
- 收稿日期: 2015-11-09
- 修回日期: 2016-04-11
- 刊出日期: 2017-05-25

Optimization of time sequence controlled pre-splitting blasting parameters and its application

Ye Haiwang^{1, 2},
Tang Ke¹,
Wan Tao¹,
Wang Chao¹,
Lei Tao^{1, 2
, ,},
Li Xinping³,
C.M. Saliou¹

1.
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
2.
Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan 430070, Hubei, China
3.
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China

摘要

摘要: 针对白鹤滩水电站地下厂房的爆破开挖，为降低爆破对岩体的损伤，采用数值模拟与现场试验研究小孔径时序控制预裂爆破中，后爆孔孔间延期时间及后爆孔孔距对时序控制预裂爆破成缝的影响，从而获取合理的延期时间和最佳的后爆孔孔距。研究结果表明，孔径为42mm的时序控制预裂爆破，先爆孔孔距为35cm时，合理的起爆延期时间为75~100μs；综合考虑炸药爆炸能量利用率和成缝效果，最佳的后爆孔孔距为70cm。科学地采用时序控制预裂爆破不仅可以减小钻孔工作量与炸药用量，还能降低对岩体的损伤，可为地下厂房爆破开挖安全、高效的进行提供一条有效的途径。
- 时序控制预裂爆破 /
- 起爆延期时间 /
- 后爆孔孔距 /
- 现场试验
Abstract: In view of the underground powerhouse excavation work by blasting at the Baihetan Hydropower Station Project, in order to reduce the blasting-involved damage to the rock mass, numerical simulation and field test were carried out to analyze the influence of the initiation delay time and the distance between later detonated holes on the blasting and the cracking with time sequence controlled pre-splitting blasting, and the reasonable delay time and the optimum distance between post-detonated holes were obtained. The results show that when the hole diameter is 42 mm and the distance between the pre-detonated holes is 35 cm, the reasonable initiation delay time is 75~100 μs, and the optimum distance between the post-detonated holes is 70cm, with joint consideration of the blasting energy's utilization ratio and blasting effect. It is found that time sequence controlled pre-splitting blasting, used scientifically, is a safe and efficient method to excavate the rock mass close to the underground powerhouse wall, which can reduce the load of blasting, cut down on the explosives used, and limit the blasting-involved damage to rock mass.
- time sequence controlled pre-splitting blasting /
- initiation delay time /
- distance between later detonated holes /
- field test

HTML全文

图 1 时序控制预裂爆破示意图

Figure 1. Schematic diagram of time controlled pre-splitting blasting

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图 2 几何模型(单位：cm)

Figure 2. Geometric model(unit:cm)

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图 3 有限元网格模型

Figure 3. Finite element model

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图 4 不同起爆延期时间工况最大拉应力值

Figure 4. Maximum tensile stress with different initiation delay times

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图 5 199.75μs时不同后爆孔孔距的应力云图

Figure 5. Stress contour with different distances between later detonated holes at 199.75μs

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图 6 不同后爆孔孔距各监测点最大拉应力变化曲线

Figure 6. Maximum tensile stress value of the monitored points wih different distances between later detonated holes

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图 7 不同后爆孔孔距各监测点速度峰值变化曲线

Figure 7. Peak velocity of the monitored points with different distances between later detonated holes

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图 8 试验装药结构图

Figure 8. Charge structure

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图 9 试验起爆网路图

Figure 9. Detonating network

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图 10 后爆孔为70cm的爆破效果图

Figure 10. Blasting effect (observed when the distance between the later detonated holes is 70 cm)

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表 1 岩石参数

Table 1. Rock parameters

材料	密度/(kg·m^-3)	弹性模量/GPa	泊松比	屈服强度/MPa	切线模量/GPa
玄武岩	2870	35	0.22	120	13.5

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表 2 岩石参数

Table 2. Rock parameters

A/GPa	B/GPa	R₁	R₂	ω	E₀/GPa	V₀
214.4	0.182	4.2	1.0	0.15	4.19	1.0

下载: 导出CSV

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