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Many research projects on engineering controls for noise reduction in mining were conducted by the former U.S. Bureau of Mines, mostly under contracts from 1972 through 1986. Contracts were awarded to determine which mining equipment was responsible for worker noise exposure over the permitted Federal regulation level of 90 …

Engineering noise control for mines: Lessons from the world

Crusher plants and machinery are major noise sources in the mining industry (Madahana et al. 2020). Several authors across the world reported that noise level inside the crusher plants ranges from ...

A multi-objective optimization design approach of large …

As a result, reducing radiated noise and weight are critical factors in the design of new large mining equipment. These optimization areas are of great interest to researchers …

A multi-objective optimization design approach of large mining …

The power and level of modernization of large mining equipment are continuously improving. Because of the potential for pollution, laws, and regulations governing energy consumption, noise, and ...

Problems of Noise Hazards in Long-Term Operated Basic Machinery …

where. r 1 and r 2:. denote the radial distance from the noise source, L(r):. is the sound pressure level at radial distance r. The formula shows that each doubling the distance from the source causes the noise level to drop by 6 dB.Decreasing the acoustic intensity of noise sources in the large-sized mining machinery is a particularly …

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Experimental modifications have been made by the Bureau of Mines on standard pneumatic rock drills to reduce the noise of the air exhaust, drill steel resonance noise, and noise radiated by the drill body. A close-fitting case and muffler around the drill body, consisting of a metallic honeycomb skeleton filled with viscoelastic absorber on the ...

Engineering noise control for mines: Lessons from the world

Results: Some of the case studies used have cited a reduction in the noise intensity emitted by machinery from a range of 93 dBA - 104 dBA to a range of 90 dBA - 94 dBA, demonstrating quite a significant reduction in the noise emission of the equipment. This article further provides recommendations on how South African mines could …

Mining Noise Control: Management

Why Reducing Mining Noise Is Critical. There are various reasons why noise control on a mine site simply cannot be neglected, including: 1. Regulatory measures. It is the law. Just like in the construction industry, …

Practical Guide for Mining Noise Control

Transmission control (keep space sealed or set up noise barriers around the miners on the premise of good ventilation); Receiving end control (headphones or other self-control methods for noise insulation); E: I have a small mining farm with 15 Antminer S9 machines. I prepared a big box made of tinplate with 15 150mm holes on one side …

Engineering Controls for Reducing Continuous Mining …

higher than those of other component operations, noise con-trols targeting the conveyor system must be considered first for effective reduction of operator noise exposure. CMM conveyor noise is caused by impacts that occur between the conveyor deck and flight bars, which are used to move mined material to the discharge end of the machine.

Noise from deep-sea mining may span vast ocean areas

In the absence of empirical data on sound-source characteristics, we used reasonable analogs to estimate potential noise levels from nodule mining equipment. For mining tools that remove nodules from the seabed, we used coastal dredges that remove seafloor gravel and sediment (181 dB re 1 µPa m, 20 Hz to 20 kHz) . Noise generated …

Noise cancelling exhausts and mufflers to reduce machine noise …

Dual-skinned and thermal reduction exhaust systems can help control exhaust surface temperatures and reduce the need for thermal blankets. Minetek has developed a range of OEM sound suppression exhaust packages and noise control solutions to reduce noise levels on mining trucks, excavators, dozers, drills, loaders, and other mining equipment ...

Experimental study of sources of noise from heavy earth-moving machinery

Exposure to noise from various types of equipment/machinery has been identified as a critical health hazard for personnel working in the Indian mining industry. Heavy Earth Moving Machinery (HEMM ...

Area Noise Assessment at Surface Stone, Sand, and Gravel …

Article. Area Noise Assessment at Surface Stone, Sand, and Gravel Mines: Application for Reducing Worker Noise Exposure. Published: 06 January 2022. …

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Experimental modifications have been made by the Bureau of Mines on standard pneumatic rock drills to reduce the noise of the air exhaust, drill steel resonance noise, and noise radiated by the drill …

Acoustic metamaterial capsule for reduction of stage machinery noise

Abstract and Figures. Noise mitigation of stage machinery can be quite demanding and requires innovative solutions. In this work, an acoustic metamaterial capsule is proposed to reduce the noise ...

About 1 — Understanding Mining Noise

00:00. 00:00. % buffered. Using an acoustic visualiser, miners can effectively listen to equipment with their eyes. Sound visualisation is the most effective noise reduction technique for reducing noise output on mining machinery, with up to 100 acoustic images generated every second by an advanced camera supported by over 120 microphones.

Minetek achieved an 11dBA noise reduction on the PC7000 mining

After Minetek completed their turn-key Sound Attenuation package the PC7000 operated at a low noise output of 116 dBA, reducing noise levels by 11 dBA. With Minetek's Sound Attenuation ...

Noise pollution in the mining industry | Reduce …

Sound attenuation packages. Minetek enable OEMs such as , , , and to have the world's quietest mining machinery. We've been helping manufacturers, mine sites and …

Advances in vibration analysis and modeling of large …

Large-scale rotating mechanical equipment in the mining arena plays a pivotal role in mining production, where vibration issues directly influence producti ... This method aimed to overcome the limitations of high-frequency component noise reduction and wavelet thresholding noise reduction techniques. 39 Luo et al. addressed the …

Noise

The impact of diesel particulate filters on noise reduction (Northam Platinum - Eland) | (1.99 ) Implementation guidance note based on a case study (Impala Platinum) | (2.73 ) Guidance note for noise measurement of equipment to ensure conformance with MHSC milestones (Kumba Iron Ore - Sishen) | …

Noise Control | Noise Reduction | Silencer | Noise Attenuation

Process silencers are applied to PD blower and compressor exhausts, stack discharges, and the venting or blow-off of high-pressure gases. Noise Control Enclosures – Engineered acoustically for superior noise control, sound enclosures are an extremely effective means for containing industrial equipment noise.

Understanding Mining Noise

How DOES SOUND ACTUALLY WORK? We've developed a repository of information to help miners and communities understand the science behind sound. Learn about the principles of sound and how varying conditions …

Strategies and Implications of Noise Pollution Monitoring

Pal et al. measured noise level in underground mines at a distance of 5, 15, 25 m from the noise source. Noise Prediction in Mining Area. The effect of ambient noise levels in opencast mines is influenced by the sound power level of the noise generators, the current geo-mining environment, and the meteorological characteristics.

Reduction of Fragment Size from Mining to Mineral …

2.1 Energy. Rock drilling, blasting, and comminution (crushing and grinding) consume a vast amount of energy in hard rock mines. As mentioned in Sect. 1, statistics from hard rock mines indicates that drilling and blasting consumes 2% and comminution does 53% of the total energy input in the whole production chain from mining to mineral …

Noise control | Are we succeeding?

The result is a noise reduction of up to 6 dB (A). These dampers have been in service now for 6 months and have successfully dealt with the noise from the dozers. Hushpak Engineering has almost 20 years of experience in providing noise control products to mining, construction, heavy industry and processing plants.

Solutions — Understanding Mining Noise

develop their noise reduction strategy. Understanding the problem is the key to managing potentially unwanted noise impacts of mining operations on personnel and their neighbours. From auditing and testing through to sound attenuation solutions, there are specialised techniques to reduce noise output by up to half.

Administrative Controls for Reducing Workers Noise …

reduce noise exposure by decreasing the amount of noise reaching the employee through engineering de­ sign approaches. Engineering controls . isolate the noise from the worker. through noise reduction" (adapted from NIOSH, 1996a). • Administrative controls. are defined as: "Methods that reduce exposure by limiting the time a worker is ex­

A multi-objective optimization design approach of large …

As a result, reducing radiated noise and weight are critical factors in the design of new large mining equipment. ese optimization areas are of great interest to researchers and have received a ...

Assessment and control of noise and dust pollution in mines …

The paper introduces a high-selective oil-shale mining technology and the first results of surface miner Wirtgen 2500SM tests. The technology allows to decrease oil-shale loses from 10-15% up to 5 ...

Environmental Noise Impact Assessment for Large …

Noise emissions are a significant environmental impact caused by the mining industry in all technological phases of surface mining, mineral processing, and waste disposal. This paper presents the …

Engineered noise controls for miner safety and …

In general, there are three approaches to reduce noise exposure levels encountered by miners: (1) controlling noise at the source by making physical …

From manual to fully-automated systems and the impact of …

The past 100 years have seen a significant shift in methods and systems used in mining, from manual towards fully automated systems. This shift has included advances in the use of AI. These changes have an impact on ONIHL and the preventive strategies in place in the form of HCPs. This chapter deliberates on these changes by presenting the …

Engineering noise control for mines: Lessons from the world

Some of the case studies used have cited a reduction in the noise intensity emitted by machinery from a range of 93 dBA – 104 dBA to a range of 90 dBA – 94 dBA, demonstrating quite a significant reduction in the noise emission of the …

9 Review of Noise-Induced Hearing Loss Prevention Research | Mining

Noise reduction of roof bolting machines using wet and mist drilling, and. Reducing noise on continuous mining machines using coated flight bars. The Hearing Loss Simulator software appears to be a very successful training aid, judging from the number of requests (>300), including organizations such as the National Hearing Conservation ...

Environmental Propagation of Noise in Mines and Nearby …

From the predicted noise levels (L den value), it was observed that in Situation A, the highest noise level near drill machine was 95 dB(A) [Table 4]. Noise levels around Shovel No. 1 and Shovel No. 2 which were operating simultaneously on different mining benches were 80 dB(A) and 85 dB(A), respectively. Noise level along the haul road ranged ...

Engineering noise control for mines: Lessons from …

Case studies of engineering noise control methods currently being used across the world. Identification of machinery that emits the most noise in the mines. Sensogut (2007) documented the main …

Practical methods for noise reduction and cooling of ASIC …

The noise produced by the ASIC miner can reach more than 80 decibels. Most of the miners such as Ebit E9, Antminer S9, A3, and D3 use a 120mm cooling fan for heat dissipation, and the speed of the fan can reach Above 6000 RPM. The rapid cutting of the air by the fan blades produces a lot of noise. Take the Antminer S9 as an example: the …

Assessment of engineering noise controls at a talc …

The noise control evaluation at the talc processing plant was performed as part of NIOSH's effort to locate and evaluate state-of-the-art engineering noise controls. In addition to locating and assessing existing controls, NIOSH is also identifying processes or machines in need of noise controls, gaps in technology that impede the use of ...

The Dual Nature of Mining: Examining the Impacts of Noise …

The following strategies can contribute to reducing noise pollution and fostering a harmonious coexistence between mines and nearby communities: a) Noise …