— The study was conducted to develop controlled blasting patterns for safe blasting operations within the blasting zone of 50–100 m from the nearby dwellings. In order to minimize ground vibrations, three methods (1) Reduced burden and spacing with shorter hole depth, (2) Modified decoupled charged using plastic pipes and (3) Pre-fracture line ...
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— During the production of open-pit mines, the stability of slopes can be affected by various factors such as structural surfaces, production blasting vibrations, and mining areas. In this study, the researchers focused on the slope of the open-pit mine at Yinshan and employed UAV mapping technology to conduct an on-site geological …
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— Download Citation | Analysis on open blasting control based on safety of existing tunnel | The existing Fo-LongGang tunnel was considered as a controlling project in an industrial park. The field ...
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— In addition, when using interval charging, the blasting vibration of the 13-meter step decreases to 1.775 cm/s at 150 m, which is less than the safe vibration speed of 2.0 cm/s and can ensure that the safety of the surrounding buildings is not affected; while the blasting vibration speed of 10-meter step decreases to less than 0.8 cm/s at 150 m ...
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— Objective: In order to determine the blasting vibration safety criteria for slope rock mass scientifically and reasonably, the influence of stress waves on surficial rock mass of mine slopes was analyzed when stress waves propagate to the slope surface, and mathematical models for blasting vibration safety criteria are proposed based on the …
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Introduction. Abrasive blasting operations forcibly apply abrasive materials to surfaces using pneumatic pressure, hydraulic pressure, or centrifugal force. In addition to exposure to …
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— A critical analysis of recent research into the prediction of flyrock and related issues resulting from surface blasting activities. The Journal of the Southern African Institute of Mining and Metallurgy, 120(12), pp. 701-714.
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— Sand blasting is a process that uses abrasive cleaning to prepare surfaces for painting. It involves blasting particles (such as sand) at high pressure to remove old paint, rust, or other contaminants. Due to the hazardous nature of sand blasting, it is crucial to conduct a thorough job safety analysis (JSA) to identify and mitigate potential ...
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Obtain SDS sheets for all controlled products (i.e. blasting medium(s), base materials, process materials) A HIAC hazard assessment must be conducted to assess the …
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— According to the attenuation law of vibration, the reasonable blasting parameters and safety technical measures are determined to ensure the slope stability through the open-pit mine blasting tests.
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Keywords: open-pit mine, high and steep slope, blasting technology, blasting vibration, numerical simulation. Citation: Wang M, Li X, Li Q, Hu Y, Chen Q and Jiang S (2021) Study on Blasting Technology for Open-Pit Layering of Complex Mine Adjacent to High and Steep Slope. Front. Earth Sci. 9:773872. doi: 10.3389/feart.2021.773872
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Pre-splitting blast at a Coal Mine ERG Industrial. Safety & Wall Stability. Ensuring stable high walls is of utmost importance in any project, be it open-pit mines, quarries, or civil engineering endeavours. Pre-splitting is …
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There are many extensive studies on the impact of rock blasting excavations on open-pit slopes and tunnels [1 ... an approach to mathematically model the influences of blasting vibration on the tunnel structure and finally provided blasting vibration safety criteria ... based on the field monitoring and analysis of the blasting vibration, ...
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— The contribution of mining blasting to open-pit failure is demonstrated from the perspective of FDM modeling (Fig. 11, Fig. 12). Although the unloading effect of excavation on slope failure is generally understood, this study provides valuable reference that blast-induced disturbance plays a critical role under instability condition.
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— Pre-split blasting design to reduce costs and improve safety in underground mining. ... Damage distribution by PPV analysis in the Pre-cut blasting design.. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.) ... C.K. McKenzie, 'Blasting near open pit walls', in ...
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— Science-based and accurate means for the evaluation of vibration caused by blasting are important for controlling hazards associated with blasting. This paper proposes a system for evaluating safety as it relates to blasting vibration. The system applies the Hilbert–Huang transform (HHT) energy analysis method combined with the signal …
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In abrasive blasting, compressed air is used to propel abrasive material from a blast pot, through a blasting hose to a nozzle, where it is directed to the work area at high velocity by the operator. Air pressure is typically …
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The document provides a job safety analysis for blasting and spray painting activities during mechanical works for an offshore project. It identifies potential hazards for each job step, including personal injuries from blasting, bursting hoses, flying dust, sparking from spray painting, gas releases, and paint/oil spills. Mitigation measures are outlined to manage …
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Safety Precautions while Blasting. For the safety of workers, red flags shall be prominently displayed around the area where blasting operations are to be carried out. All the workers at the site shall withdraw to a safe distance of at least 200 meters from the blasting site. An audio warning by blowing whistle shall be given before igniting ...
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— Previous studies have revealed that toxic gases and dust (smoke dust) are the most common pollutants generated by the blasting operations in open-pit mines, which might lead to a threat to the environment's condition, health and safety, and properties protection around the blasting site. In order to deal with the problems, a pollution …
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A "Blaster-in-Charge" (BIC) must oversee all the blasting operations. This person is held accountable for completing all tasks associated with these activities. Additionally, a thorough inspection of new blasting sites is necessary for hazards and environmental impacts. Before beginning a blast, the BIC should get all blas…
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Abrasive blasting is a process that is widely used to clean and remove a coating on a surface by using abrasive media such as aluminium oxide, steel shot, garnet and coal …
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— 1. Introduction. Dust pollution in deep, sunken open-pit mines (DSOMs) is one of the main factors affecting the normal work and production in the mines. 1−3 Blasting, which generally requires a large amount of explosives, is the main source of atmospheric pollution in DSOMs, which results in vast and also tremendous dust dispersion degrees. …
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— The blasting for bedrock excavation on land for open channel project has a great influence on lock gate in Taishan Nuclear Power Station, therefore, based on blasting vibration monitoring data ...
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20928398-Jsa-41-Sand-Blasting.doc - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read online for free. Sand blasting involves potential hazards that require precautions. Workers must use proper …
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— Blasting is accompanied by a number of side effects that have a negative impact on the environment, such as ground vibration, flyrock, AOp, and backbreaks [33, 42].These effects are more severe if they are carried out in close proximity to residential buildings, factories, offices or if they are improperly designed [].Proper designing of a …
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— The propagation process of blasting vibration has always been a difficult problem affecting the stability of high slopes in open-pit mines. Taking the Jianshan Phosphorus Mine as the research background, combined with engineering geological investigation, field blasting test, blasting vibration monitoring, numerical simulation …
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— Common Safety Hazards. Abrasive blasting may also pose safety hazards if the system is not used properly. For example, dusts created from both the media being blasted and the surface can cause health problems if users are too exposed to inhale the dust particles. Here are some examples of common safety hazards in abrasive blasting:
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In this article, we discuss how to safely conduct blasting operations in hard rock or soil. Safety Precautions before Blasting. The blasting operations shall be carried out under the supervision of a responsible authorized …
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Safe mining operations through technological advancement. Moshood Onifade, ... Amtenge Penda Shivute, in Process Safety and Environmental Protection, 2023. 3.1 Drilling and blasting. Drilling and blasting in mining are conducted for rock fragmentation to allow easier material handling for comminution. Despite the relevance of rock fragmentation in …
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ANALYSIS OF SLOPE STABILITY AND ELEVATION EFFECTS IN OPEN-PIT BLASTING BASED ON ENVIRONMENTAL SAFETY Author Name Author Affiliation Abstract Slope stability is a way of analyzing how much stress a certain elevation can bear before it can give in to a certain amount of force applied to it. The elevation could be elevated slopes, …
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— 1. Introduction. Tunnel excavation blasting operations often result in important negative impacts. The negative effects of blasting-induced blast earthquakes, in particular the hazards caused by blast earthquakes to surrounding buildings and facilities, are receiving increasing attention and emphasis [1].Reducing the vibration hazards …
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— Response characteristics of HDPE pipe is obtained by field test.. LS-DYNA is utilized to simulate the jointed pipe under blasting load. • Contrast analysis of the effect of a joint on the dynamic behavior of the pipe.. Mechanical properties of jointed HDPE pipe under complex blasting conditions.. Predicting pipe response under complex conditions …
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