smooth blasting presplit
(PDF) Comparison of Presplit and Smooth Blasting
To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively.
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Comparison of Presplit and Smooth Blasting Methods for ...
To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively. The ground vibrations induced by them have been monitored with the different distances through the corresponding devices.
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(PDF) Comparison of Blast-Induced Damage Between
For example, Hu et al. (2014) compared the blast-induced damage between presplit and smooth blasting of high rock slope by the dynamic finite software code LS-DYNA. In order to present the ...
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Comparison of Blast-Induced Damage Between Presplit
2013-9-14 · Comparing the damage zone induced by the contour blasting itself, as shown in Fig. 10, the extent of high degree damage around the blast hole of smooth blasting is about 0.83 m, but for the presplit blasting, it is 1.1 m, which is an increase by 30 % compared to smooth blasting. The results of the presplit blasting excavation method prove that ...
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Numerical and experimental investigation of blasting ...
2018-4-10 · The presplit-smooth blasting was verified that it could inherit the advantages of presplit and smooth blasting. Abstract The disturbance of a rock mass due to blasting impact and stress redistribution can significantly affect the overall performance of an excavation.
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Summary of Surface Blasting with Comparison of Two ...
2019-5-24 · Compared smooth blasting with presplit blasting. For each case, there were production blasts, buffer blasts, and then either a smooth or presplit blast. High Rock Slopes in China – Smooth Blast. Damage is predominately a result of the first two production blasts, penetrating into the rock mass.
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Understanding the connection between blasting and
2019-1-1 · Presplit blasting involves drilling a single row of holes along the back of the final excavation zone . Unlike smooth wall blasting, the presplit holes are fired on the first delay of the production blast. The presplit technique is the most commonly used controlled blasting technique for surface operations. 3. Methods3.1. Line drilling
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Explosives Engineers’ Guide
2020-4-22 · Presplit blasting Spacing = Hole diameter x 12 Burden = 0.5 x production blast burden (B) Uncharged length at top = 10 x D Powder factor = 0.5kg per square metre of face Do not stem holes. Fire all holes on the same delay, or in groups of ≥ 5 holes Smooth blasting Spacing = 15 x Hole diameter (hard rock) 20 x Hole diameter (soft rock)
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土木外文文献与翻译--新奥法(NATM)隧道设计.doc-建筑节能 ...
2017-9-18 · To this end, the construction of sub-section should not block too much, excavation should be used smooth blasting, presplit blasting or mechanical tunneling. （2）. In order to give full play to rock the carrying capacity should be allowed to control and rock deformation.
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Comparison of Presplit and Smooth Blasting Methods for ...
To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively. The ground vibrations induced by them have been monitored with the different distances through the corresponding devices.
Read More
Numerical and experimental investigation of blasting ...
2018-4-10 · The presplit-smooth blasting was verified that it could inherit the advantages of presplit and smooth blasting. Abstract The disturbance of a rock mass due to blasting impact and stress redistribution can significantly affect the overall performance of an excavation.
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smooth blasting presplit - adca.be
Jul 03, 2017It is a packaged presplit product designed for smooth wall blasting application, manufactured in NSA's purpose built presplit manufacturing facility in Kalgoorlie, Western Australia. The Python Maxisplit design consists of a continuous casing film that is filled with a high energy watergel explosive, clipped at 400mm intervals ...
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Comparison of Blast-Induced Damage Between Presplit
This paper focuses on the comparison of damage induced by smooth blasting and presplit blasting based on the excavation of high rock slope. The whole damage process of the smooth blasting and presplit blasting excavation method is studied by using a cumulative blasting damage numerical simulation technology based on the secondary development of the dynamic finite
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FINAL WALL STABILITY IN METAL OPEN PIT MINES
2016-9-19 · The common controlled blasting techniques are line, smooth, cushion and presplit blasting. The latter technique has become the most widely used in metal open pit mines, due to good results and its operational nature in hard rock formation. PRESPLIT BLASTING Presplit blasting is an effective technique for stabilizing the final wall in open pit ...
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不同开挖方式下岩石高边坡损伤演化过程比较-【维普期刊官网 ...
of LS-DYNA,the overall process damage simulations of rock slope excavated by the smooth blasting and presplit blasting techniques are carried out in consideration of accumulated damage simulation technology.For the smooth blasting ,followed ...
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Explosives Engineers’ Guide
2020-4-22 · Presplit blasting Spacing = Hole diameter x 12 Burden = 0.5 x production blast burden (B) Uncharged length at top = 10 x D Powder factor = 0.5kg per square metre of face Do not stem holes. Fire all holes on the same delay, or in groups of ≥ 5 holes Smooth blasting Spacing = 15 x Hole diameter (hard rock) 20 x Hole diameter (soft rock)
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SCI-武汉大学水工岩石力学教育部重点实验室
2021-9-26 · Comparison of blast induced damage between presplit and smooth blasting of high rock slope Rock Mechanics and Rock Engineering 2013,DOI 10.1007/s00603-013-0475-7 38 Li, D. Q*., Jiang, S. H., Chen, Y. G., Zhou C. B. A comparative study of three
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A better way to presplit - Mining & Construction online
2011-8-3 · With ROC rigs, presplit holes can always be drilled as planned. Furthermore ROC rigs are not just better at presplit drilling, they can also be used for a variety of other tasks such as leveling benches for the large rigs, complementary drilling of buffer holes up to 203 mm, drilling long, horizontal dewatering holes or using the Reverse ...
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土木外文文献与翻译--新奥法(NATM)隧道设计.doc-建筑节能 ...
2017-9-18 · To this end, the construction of sub-section should not block too much, excavation should be used smooth blasting, presplit blasting or mechanical tunneling. （2）. In order to give full play to rock the carrying capacity should be allowed to control and rock deformation.
Read More
smooth blasting presplit - adca.be
Jul 03, 2017It is a packaged presplit product designed for smooth wall blasting application, manufactured in NSA's purpose built presplit manufacturing facility in Kalgoorlie, Western Australia. The Python Maxisplit design consists of a continuous casing film that is filled with a high energy watergel explosive, clipped at 400mm intervals ...
Read More
FINAL WALL STABILITY IN METAL OPEN PIT MINES
2016-9-19 · The common controlled blasting techniques are line, smooth, cushion and presplit blasting. The latter technique has become the most widely used in metal open pit mines, due to good results and its operational nature in hard rock formation. PRESPLIT BLASTING Presplit blasting is an effective technique for stabilizing the final wall in open pit ...
Read More
Explosives Engineers’ Guide
2020-4-22 · Presplit blasting Spacing = Hole diameter x 12 Burden = 0.5 x production blast burden (B) Uncharged length at top = 10 x D Powder factor = 0.5kg per square metre of face Do not stem holes. Fire all holes on the same delay, or in groups of ≥ 5 holes Smooth blasting Spacing = 15 x Hole diameter (hard rock) 20 x Hole diameter (soft rock)
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Blasting damage in rock - static.rocscience.cloud
2022-1-5 · correctly designed and executed, smooth blasting can be very beneficial in trimming the final excavation face. Figure 1 illustrates a comparison between the results achieved by a norm. al blast and a . face created by presplit blasting in jointed gneiss. It
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SCI-武汉大学水工岩石力学教育部重点实验室
2021-9-26 · Comparison of blast induced damage between presplit and smooth blasting of high rock slope Rock Mechanics and Rock Engineering 2013,DOI 10.1007/s00603-013-0475-7 38 Li, D. Q*., Jiang, S. H., Chen, Y. G., Zhou C. B. A comparative study of three
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A New Technology for Smooth Blasting without
For smooth blasting, explosives were generally in the form of air-decked decoupled charges. However, explosives may self-extinguish or refuse to blast in a blasthole because of the channel effect or excessively long gap distances between explosives [].The full-length detonating cord detonation propagation method is usually used in blastholes, as shown in Figure 1.
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南昌大学 - 建筑工程学院 - 副教授-杨建华
2019-2-26 · Comparison of blast induced damage between presplit and smooth blasting of high rock slope. Rock Mechanics and Rock Engineering, 2014, 47(4): 1307-1320. [20] Zhang WJ, Lu WB*, Yang JH, Yan P. Cracking of surrounding rocks induced by excavation
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非均质岩层隧道光面爆破超欠挖问题研究 | 重庆交通大学 ...
2021-6-13 · Comparison of Presplit and Smooth Blasting Methods for Excavation of Rock Wells[J]. Shock and Vibration,2019,2019. [6]沈显才.地铁暗挖隧道聚能水压光面爆破新技术应用分析[J].铁道建筑技术,2017(05):102-105+123.
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A better way to presplit - Mining & Construction online
2011-8-3 · With ROC rigs, presplit holes can always be drilled as planned. Furthermore ROC rigs are not just better at presplit drilling, they can also be used for a variety of other tasks such as leveling benches for the large rigs, complementary drilling of buffer holes up to 203 mm, drilling long, horizontal dewatering holes or using the Reverse ...
Read More
土木外文文献与翻译--新奥法(NATM)隧道设计.doc-建筑节能 ...
2017-9-18 · To this end, the construction of sub-section should not block too much, excavation should be used smooth blasting, presplit blasting or mechanical tunneling. （2）. In order to give full play to rock the carrying capacity should be allowed to control and rock deformation.
Read More