آخرین محصولات
The influence of forced ventilation airflow on water spray …
An airflow–droplet–dust multiphase coupling model was established based on the Eulerian–Lagrangian method and the following conclusions can be drawn: with an increase of airflow migration distance, the number of vortices gradually decreased, and dust-capturing probability caused by collision with wall decreased gradually along the …
A new design of spray nozzle used for precise dust …
Now, water sprays are widely used for dust prevention and suppression in the mining process in coal mines, but dust suppression efficiency is too low to meet with the actual demand [1], [2], [3]. has an excellent effect on dust control with the mechanism of wetting, adhesion, interception, and settlement, etc.
Anchorage experimental research on a coal roadway with water spraying …
Abstract: Aiming at the problem of continuous water seepage, spraying and gushing along the borehole of bolt (cable) in rock stratum with rich water, a new waterproofing anchorage agent is introduced; and the corresponding waterproof reaction mechanism and its ratio test on this cartridge are researched. To obtain the strengthen …
Engineering Controls Database
In coal mining, overexposure to respirable coal mine dust can lead to coal workers' pneumoconiosis (CWP). CWP is a lung disease that can be disabling and fatal in its most severe form. ... Nonclogging water spray …
Coal dust suppression based on water mediums: A review of …
China faces a challenge in the sustainable development of the coal industry due to pneumoconiosis problems. Dust control technologies are crucial for safe …
A comparative study of dust control practices in Chinese and …
The study shows that water infusion, face ventilation controls, water sprays, and deep and wet cutting in longwall shearer operations are commonly practiced in …
Water allocation between coal mines and chemical …
When taking coal chemical industry and coal mining together, the problem of water shortage in coal chemical plants may find new ways out [11]. During the coal mining process, part of the surface water, groundwater and coal seam seeps into the roadway through the cracks to form mine water, and fail to find outbound channels for drainage
A new design of spray nozzle used for precise dust …
Generalized Estimating Equation (GEE) model was used to conduct a statistical analysis on a total of 29,707, and 32,643 mine-year observations for underground coal mines and surface coal mines ...
The influence of forced ventilation airflow on water spray …
1. Introduction. Underground mining is the main coal mining method. About 95% of coals are produced by underground mines in China [1].For modern high yield and high efficiency coal mines, fully mechanized excavation technology has played an important role in guaranteeing high production rates and high mining efficiency [2], …
Experimental investigation of the performance of a novel …
With the water spraying system alone, ... the reduced water requirements would promote the increased use of dust control technology in underground coal mines where water is normally in short supply. 3. ... (SACMS), Case assembly of Chinese coal mine accidents of more than 100 deaths, China University of Mining and …
Coal Producer Improves Safety & Opens New …
FloMax® air atomizing nozzles have improved safety in the mine and allowed the coal producer to mine areas that were previously untapped. Because the production value of a single continuous miner can far …
Applied Sciences | Free Full-Text | The Application of the …
Mine dust is one of the main disasters that threatens the safety of coal mine production, deteriorates the underground working environment and induces various occupational diseases. Based on the harm of mine dust identified and the current domestic and foreign dust-proof technology, the technical research of the dust reduction is …
Coal seam water infusion for dust control: a technical review
Coal mine dust continues to be a health and safety issue in underground coal mines. Coal seam water infusion was developed and widely applied in European coal mines for dust control, and was also a common practice in most Chinese coal mines. This method typically involves the infusion of water into the coal seam to increase its …
Preparation and performance analysis of a coking coal …
2.1 Materials. Coking coal samples were obtained from the Shanxi Wanfeng coal mine. The coking coal from the Shanxi Wanfeng coal mine had poor wetting properties (making wetting using water difficult), and a large contact angle (88.76°) (Liu 2006; Luo et al. 2016; Zhou et al. 2018b; Wang et al. 2019c).First, a pulverizer was used …
New Respirable Dust Suppression Systems for Coal Mines
Dust suppression in coal mines is a worldwide problem which has not been solved effectively. ... A number of nozzles may be used to spray water as required. The control units consist of sensing units and control panels. ... China University of Mining & Technology, 1996. (In Chinese) [10] Xie Y S, Jiang X Y. Dust removal technology with …
A comparative study of dust control practices in Chinese and Australian
Section snippets Regulations in China. In China, "Safety Regulations in Coal Mine" is an important reference for all coal mines. There are regulations regarding mine dust, which stipulates that all coal mines should take active measures to minimize dust or toxic substance concentrations to a certain level that meets the requirements in …
Coal mine closure substantially increases terrestrial water …
Analysis of GRACE satellite data suggests that coal mine closures in China between 2014 and 2019 significantly increased terrestrial water storage due to the cessation of dewatering procedures and ...
Investigation on the new design of ing device used for …
A new ing device used for dust suppression was proposed. • The reasonable working water flow of the device was 0.84–1.12 m 3 /h.. The maximum production quantity was produced at air flow of 45–48 m 3 /h.. The device outlet pressure increased with the water pressure linearly.
Applications of Water Infusion for Dust Control in …
Water infusion method was developed and widely applied in European coal mines for dust control, and is now a common practice in most Chinese coal mines. This …
Evolution of Water Hazard Control Technology in China's …
We analyzed the regional nature of China's coal mine water disasters based on three aspects: the main water source, water-conducting passages, and threat level of …
Risk Assessment of Coal Dust Explosions in Coal Mines …
Water spraying at the source should be used to control the coal dust produced by cutting, drilling, and blasting operations . ... Zhaoyang M, Zhimin W (2016) A comparative study of dust control practices in Chinese and Australian longwall coal mines. Int J Min Sci Technol 26(2):199–208. Article Google Scholar
The influence of forced ventilation airflow on water spray …
Water spray is the most commonly used method for suppressing mine dust. On the heading face of high gassy mine, forced ventilation is employed to dilute and discharge methane in order to prevent methane accumulation. ... A comparative study of dust control practices in Chinese and Australian longwall coal mines. International …
Water In Coal: Still Murky
In the Water Ten Plan, Chinese miners are expected to increase mine water utilisation rate and to prioritize the use of mine water in the mine refill, ... When considering water use in coal mining and processing, values range between 0.2-4.8 m 3 per tonne of coal: a 24-fold variation. Most probably the actual water use lies …
Controlling coal fires using the three-phase and water …
The results show that the three-phase and water mist techniques control coal fires efficiently and ensure the safe production of the mine as well as the security of personnel and equipments. ... Before spraying water mist, ... based on a comparison of Chinese mining information to previous remote sensing estimates. Int J …
A comparative study of dust control practices in Chinese and …
The study shows that water infusion, face ventilation controls, water sprays, and deep and wet cutting in longwall shearer operations are commonly practiced in almost all underground longwall mines and that both Chinese and Australian longwall mine dust control practices have their own advantages and disadvantages.
Coal mine closure substantially increases terrestrial …
The closure of coal mines can impact terrestrial water storage through various mechanisms. D uring coal mining operations, sig- ... Since 2010, the Chinese government has implemented coal phase ...
FAILURE CHARACTERISTIC OF COAL ROADWAY WITH WATER SPRAYING …
The study for bolt supporting technology in the coal roadway surrounding rock of water-weaking[C]// GU Shuancheng,YANG Gengshe,REN Jianxi,ed. The Engineering Theory and Application of West Mining Construction. Xuzhou：China University of Mining and Technology Press,2009：372-376.(in Chinese))
Review on Dust Control Technologies in Coal Mines of China …
This article reviews the development process of dust prevention and control in underground coal mines in China, summarizes various technologies, and divides them into dust suppression, open-space dust reduction, and mine dust collectors according to different …
Dust reduction method based on water infusion blasting in …
DOI: 10.1080/15567036.2021.1903118 Corpus ID: 233631658; Dust reduction method based on water infusion blasting in open-pit mines: a step toward green mining @article{Zhiming2021DustRM, title={Dust reduction method based on water infusion blasting in open-pit mines: a step toward green mining}, author={Wang Zhiming and …
Use of Air-and-Water Spraying Systems for Improving Dust Control in Mines
Abstract This article describes air-and-water spraying systems, designed at the KOMAG Institute of Mining Technology, used in longwall shearers, in roadheaders, at transfer points of conveyors and in roadways. The simple and lightweight design of roadway spraying systems ensures that the solutions can be used anywhere that dust occurs in the air. …
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