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Drilling and Blasting - an overview ScienceDirect Topics

  The process of drilling and blasting is technically complex, to ensure that the exercise is done safely and also achieves the required quantity of broken rock at the foot of the working face, and which is fragmented into workable rock pieces without excessive

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Drill and Blast Mining Methods American Mine Services

Drilling and blasting is a very versatile method that can be utilized in all different types of rocks. Drill and blast requires a lower up-front investment than acquiring a TBM, making

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Blasting excavation and stability control technology for ultra

2023年2月14日  Blasting is the major way for rock excavation on large projects, especially for ultra-high steep rock slope. Due to the constraints of topography and geomorphology,

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Optimized design of drilling and blasting operations in open

2018年11月1日  Drilling and blasting Uncertainties System dynamic modelling Optimization Vensim 1. Introduction Mining activity is mostly represented by these four main

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Blasting Rock Fragmentation, Drilling

Category: Science Tech explosive blasthole blasting, process of reducing a solid body, such as rock, to fragments by using an explosive. Conventional blasting operations include (1) drilling holes, (2) placing a charge and

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Excavation Method of Reducing Blasting Vibration in

2017年12月7日  To effectively reduce the blasting vibration by optimizing the blasting excavation method, firstly, the site test on blasting vibration is conducted to obtain the

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Comparison of Presplit and Smooth Blasting Methods for

2019年1月20日  Drilling and blasting methods have been extensively applied to rock excavation in mining and civil engineering due to its low cost, high efficiency, and easy

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Calculation of blast hole charge amount based on three

2022年1月11日  Take the blast hole lithology data as a sample, adopt the inverse square distance method to interpolate the solid elements within the blasting area, and then use

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Controlling Vibration Speed in Tunnel Excavation Using Fine Blasting ...

2021年9月30日  It is very important to reduce the impact of blasting vibration on the surrounding structures during the tunnel drilling-blasting excavation. Taking the diversion tunnel of the urban water supply project in Zhumadian, Henan Province, China, as an example, the segmentation linear function between the drilling rig and borehole depth

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Study on dust distribution in a highway tunnel during the

The drilling-blasting method is commonly used in the construction of highway tunnels. As shown in Fig. 1, a large amount of dust will be generated during the construction process.The existence of dust will not only reduce the visibility in the workspace, shorten the service life of construction equipment and affect the radio waves in the workspace, but

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(PDF) ROADWAY TUNNEL CONSTRUCTION WITH DRILLING-BLASTING METHOD ...

2018年10月12日  This tunnel is planned to be a double tube with a total length of 880 meters starting at Km: 3 + 450 and ending at Km: 4 + 330. New Austrian Tunneling (NATM) method will be applied along the ...

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Introduction to Underground Excavation by Drilling and Blasting

2016年11月23日  1.1 Working Cycle of Excavation by D B. Drilling and blasting are the most common methods for tunneling and underground excavation. The process begins with holes of predetermined diameter, depth, and spacing being drilled into the rock. Explosives are placed in the holes, and when detonated, the energy generated by the explosive

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Minerals Free Full-Text Evaluating the Application of Rock

2021年12月29日  The method of drilling and blasting with explosives is widely used in rock fragmentation applications in underground construction projects, such as tunnels and caverns. However, the use of explosives is associated with rigorous safety and environmental constraints, since blasting creates toxic fumes, ground vibrations, and

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A new excavation technology of blasting combined with TBM

2023年2月10日  Abstract. The technical feasibility of drilling and blasting or TBM excavation method is the key to determine the underground engineering. In view of the high strength, high abrasiveness and good integrity of hard rock in site, and considering the damage of surrounding rock must be controlled within a reasonable range, the blasting combined

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DRILLING AND BLASTING - Transportation Research Board

resulting from research into drilling and blasting may likely bring wider adoption of conventional methods. When the drilling and blasting method is used, the ground is shattered by the detonation of explosives within holes drilled into the solid rock. These holes are usually 25.4 to 50.8 mm (1 to 2 in) in diameter, spaced several

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(PDF) ROCK BLASTING FOR MINING - ResearchGate

2017年4月15日  ring drilling and blasting methods.. The short-hole blasting is usually limited to drilling rounds of 1.2 m to 5.0m leng th and hole . diameters of up to 43 mm.

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Blasting Techniques Used in Underground and Opencast Mines Mining ...

2023年7月19日  Read this article to learn about the blasting techniques adopted in underground and opencast mines. Blasting Techniques Adopted in Underground Mines: Drilling Patterns in Stone: Drilling patterns, also called shot-hole patterns, are named after the type of cut holes used and the principal patterns are: (1) Pyramid cut or cone cut (2)

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FHWA - Center for Local Aid Support - Publications

Blasting Methods. Blasting is used for rock excavation on both small- and large-scale projects. There are two general types: production blasting and controlled blasting. ... Smooth blasting uses drill holes with roughly the same diameter and depth as those used in presplitting, spaced slightly further apart and loaded with a slightly larger ...

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Blasting excavation and stability control technology for ultra

2023年2月14日  Blasting is a common method for ultra-high steep rock slope. Requirements on protection of reserved rock and stability control after blasting are very strict. Slope excavation has a great impact on the whole process of hydropower projects. It takes many steps from natural slope to engineering slope.

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Research on Dynamic Response of Shallow Buried Tunnel

2022年6月10日  To study the dynamic response of shallow buried tunnel lining by drilling and blasting method, ABAQUS simulation software was used to establish a tunnel blasting finite element model based on the consideration of in situ stress. Dynamic static coupling numerical simulation was conducted to analyze the vibration response and stress

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Drill and Blast Performance Evaluation at the Obra Pit of

blasting performance; (iv) MREL Micro Trap VOD/Data Recorder was used in the determination of the velocity of detonation of the bulk explosive; and (v) Mine Management Reporting Software was used for the estimation of the cost of secondary drilling and blasting. 2.2 Methods Two main methods employed in the research include:

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A review of some nonexplosive alternative methods to

The conventional blasting rock excavation method is the main means of rock breakage because of its high productivity, and it is relatively inexpensive compared to other methods. However, it raises safety concerns and can negatively impact the environment. The major disturbances that may be induced by this method include flyrock, gas emissions, and

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An overview of ahead geological prospecting in tunneling

2017年3月1日  The principle, features, technical levels and the future trend of proposed ahead prospecting technologies in the drilling-and-blasting tunnel has been introduced above. In some countries such as China, the drilling and blasting method is still a predominant excavation method in tunneling, which is indeed more widely used than TBM.

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Comparison of Presplit and Smooth Blasting Methods for Excavation of ...

2019年4月23日  Drilling and blasting methods have been extensively applied. to rock excavation in mining and civil engineering due to its. low cost, high efficiency, and easy operation. [1–5].

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Intelligent classification model of surrounding rock of tunnel

2021年10月1日  The samples for intelligent SR classification comprise (i) the drilling parameters of intelligent jumbos (China Railway Construction Heavy Industry Corporation, Ltd., see Fig. 3) (Liu, 2019) and (ii) grades of SR on the faces of tunnels formed by drilling and blasting.As shown in Fig. 4, when an intelligent jumbo drills a blast hole in a tunnel

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Full article: Rock blasting vibration velocity and excavation damaged ...

2023年2月10日  According to the rock blasting process and breaking mechanism, Liu et al. (Citation 2016), Chen et al. (Citation 2011) and Zhu and Lu (Citation 1998) have analyzed the rock broken state using drilling and blasting method. And the rock damaged variable is used to characterize the fracture degree of rock mass, then the critical damage threshold ...

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Types and occurrence time of rockbursts in tunnel affected

2022年6月20日  Therefore, a method for interpreting the potential rockburst type and occurrence stage affected by geological conditions and drilling blasting procedures is proposed in this paper. Relying on a drilling and blasting tunnel with frequent rockburst, large data including geology, construction, MS, rockburst and other information in hundreds of ...

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Types and occurrence time of rockbursts in tunnel affected

2022年6月20日  This leads to an unclear understanding of the surrounding rock fracture characteristics in different excavation procedure stages of the drilling and blasting method and its correlation with the characteristics of rockburst occurrence time and type (Zhou et al., 2018). In addition, the existing research on rockburst mainly focuses on rockburst ...

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