Study on dust diffusion characteristics of continuous dust sources and spray dust control technology in fully mechanized working face

2021 ◽  
Author(s):  
Yapeng Wang ◽  
Zhongan Jiang ◽  
Feng Zhang ◽  
Ying Lu ◽  
Yingwei Bao
Keyword(s):  
Dust Control ◽  
Control Technology ◽  
Working Face ◽  
Dust Sources ◽  
Diffusion Characteristics ◽  
Dust Diffusion

The Practice and Innovation of Coal Dust Control Technology in Comprehensive Tunneling Face

2014 ◽  
Vol 522-524 ◽  
pp. 1457-1460
Author(s):  
Xue Jun Zhu ◽  
Hai Yun Zhang ◽  
Yin Wang
Keyword(s):  
High Pressure ◽  
Coal Mine ◽  
Coal Dust ◽  
Health And Safety ◽  
Dust Control ◽  
Control Technology ◽  
Water Curtain ◽  
Dust Fall ◽  
Working Surface ◽  
Working Face

According to the characteristics of the tunneling working face dust, the digging machine spray and airflow purifying water curtain linkage automatic spraying dust settling technology, improved the precipitator, research and application of high pressure spray technology, make the tunneling working surface has good dust fall effect, to ensure the workers health and safety in production of coal mine.

scholarly journals Zoning Control Technology of Gob-Side Roadway Driving with Small Coal Pillar Facing Mining in a Special Isolated Island Working Face: A Case Study

2021 ◽  
Vol 11 (22) ◽  
pp. 10744
Author(s):  
Changliang Han ◽  
Houqiang Yang ◽  
Nong Zhang ◽  
Rijian Deng ◽  
Yuxin Guo
Keyword(s):  
Control Method ◽  
Coal Pillar ◽  
Control Technology ◽  
Stability Zone ◽  
Pressure Relief ◽  
Collaborative Control ◽  
Working Face ◽  
Underground Coal Mines ◽  
Engineering Practices

The gob-side roadway in an isolated island working face is a typical representative of a strong mining roadway, which seriously restricts the efficient and safe production of underground coal mines. With the engineering background of the main transportation roadway 1513 (MTR 1513) of the Xinyi Coal Mine, this paper introduces the engineering case of gob-side roadway driving with small coal-pillar facing mining in an isolated island working face under the alternate mining of wide and narrow working faces. Through comprehensive research methods, we studied zoning disturbance deformation characteristics and stress evolution law of gob-side roadway driving under face mining. Based on the characteristics of zoning disturbance, MTR 1513 is divided into three zones, which are the heading face mining zone, the mining influenced zone, and the mining stability zone. A collaborative control technology using pressure relief and anchoring is proposed, and the differentiated control method is formed for the three zones. For the heading face mining zone, the control method of anchoring first and then pressure relief is adopted; for the mining influenced zone, the control idea of synchronous coordination of pressure relief and anchorage is adopted; for the mining stability zone, the control method of anchoring without pressure relief is adopted. Engineering practices show that the disturbance influence distance of working face 1511 on MTR 1513 changes from 110 m advanced to 175 m delay. At this time, the surrounding rock deformation is effectively controlled, which verified the rationality of the division and the feasibility of three zoning control technology. The research results can provide reference for gob-side roadway driving with small coal pillar facing mining in a special isolated island working face.

Numerical Simulation Study on Air-Flow Migration Law about Vortex Air Curtain of Plane Wall Fan Drum

2012 ◽  
Vol 241-244 ◽  
pp. 1285-1292
Author(s):  
Gang Zhou ◽  
Sen Cao ◽  
De Ming Wang ◽  
Wei Min Cheng ◽  
Wen Nie
Keyword(s):  
Numerical Simulation ◽  
Control System ◽  
Simple Algorithm ◽  
Plane Wall ◽  
Dust Control ◽  
High Concentration ◽  
Air Curtain ◽  
Working Face ◽  
Simulation Results ◽  
Migration Law

Vortex air curtain of plane wall fan drum can control the diffusion of air stripping dust effectively. In order to solve the high-concentration dust problem in fully mechanized excavation face, formation mechanism of vortex air curtain was analyzed. According to fluid mechanical control equations of gas phase flow, mathematical model was established to solve air migration law of vortex air curtain in fully mechanized excavation face. By using Simple algorithm based on collocated grid and fluent software, numerical simulation of air spatial migration law of closed-end dust control in fully mechanized excavation face was carried out. The simulation results show that vortex air curtain dust control system can form dust control fan drum along driving head to the front of the roadheader driver. According to the simulation results and actual conditions of working face field, vortex air curtain suction dust control system consisted of plane wall fan drum and exhausted dust purification device in fully mechanized excavation face was designed, and after it was applied in fully mechanized excavation face, the dust concentration decreased effectively in the working face field.

Study and application on foam-water mist integrated dust control technology in fully mechanized excavation face

2020 ◽  
Vol 133 ◽  
pp. 41-50 ◽  
Author(s):  
Qingguo Wang ◽  
Deming Wang ◽  
Fangwei Han ◽  
Fan Yang ◽  
Yingxia Sheng
Keyword(s):  
Water Mist ◽  
Dust Control ◽  
Control Technology

Study on Dust Hazard in Coal Mine and its Countermeasures

2014 ◽  
Vol 986-987 ◽  
pp. 730-733
Author(s):  
Shi Bin Wang ◽  
Ri Hui Chen ◽  
Xiang Yun Meng
Keyword(s):  
Prevention And Control ◽  
High Speed ◽  
High Efficiency ◽  
Dust Control ◽  
High Yield ◽  
Mining Equipment ◽  
Dust Generation ◽  
Dust Diffusion ◽  
Control Work ◽  
And Control

With the development of modern coal mining equipment, high-yield, high efficiency, high-speed mining technology was achieved, but also a sharp increase in the amount of dust generated in the mine at the same time, it damage workers health and bring insecurity to mine production. This paper has summarized the existing domestic and international prevention and control technology of dusts, elaborated mineral dust prevention and control work from the dust control, dust generation and dust diffusion three major aspects, and noted that the current technology trends.

scholarly journals Research Status of Pathogenesis of Pneumoconiosis and Dust Control Technology in Mine—A Review

2021 ◽  
Vol 11 (21) ◽  
pp. 10313
Author(s):  
Guoming Liu ◽  
Qianqian Xu ◽  
Jipeng Zhao ◽  
Wen Nie ◽  
Qingkun Guo ◽  
...  
Keyword(s):  
Occupational Health ◽  
Prevention And Control ◽  
Dust Control ◽  
Dust Removal ◽  
Research Progress ◽  
Control Technology ◽  
Dust Suppression ◽  
Efficient Treatment ◽  
Mine Dust ◽  
And Control

Pneumoconiosis has become one of the biggest threats to the occupational health and life safety of mining workers in China. The number of pneumoconiosis cases has continued to rise in recent years. The main task of occupational health development is to study the pathogenesis of pneumoconiosis and to develop mine dust prevention and control technology. Therefore, this paper summarizes the research progress of coal worker pneumoconiosis and dust prevention and control in mines. Firstly, the research progress of coal worker pneumoconiosis is analyzed from the aspects of pathogenesis, animal model and pathological changes of coal worker pneumoconiosis. Then, the existing basic theory and technology of dust prevention are described, including ventilation and dust removal, spray and dust suppression, and chemical dust suppression methods. Finally, based on the dust removal theory of wet shotcrete, the progress of shotcrete dust control technology and equipment used for shotcrete is summarized from the aspects of shotcrete technology process and shotcrete materials. At the same time, in view of the shortcomings of the existing research, the next research prospect is given in the pathogenesis of pneumoconiosis, intelligent dust prevention, jet spraying dust removal and so on. This paper provides theoretical support for realizing the separate source and efficient treatment of mine dust control and helps to improve the clean production level of mine, control and prevent pneumoconiosis.

scholarly journals Researches on the numerical simulation of the dust pollution characteristics and the optimal dust suppression wind-speed on fully mechanised caving face

2021 ◽  
pp. 014459872110558
Author(s):  
Jinming Mo ◽  
Wei Ma
Keyword(s):  
Numerical Simulation ◽  
Wind Speed ◽  
Wind Velocity ◽  
Mass Concentration ◽  
Dust Control ◽  
Dust Pollution ◽  
Dust Suppression ◽  
Working Face ◽  
Dust Mass ◽  
Wind Velocities

Dust removal by ventilation is a commonly used dust control strategy. This study analyses the characteristics of airflow transport and dust pollution on a fully mechanised top-coal caving face at different inlet wind velocities by using a numerical simulation experiment, and the best wind velocity for dust suppression is obtained. When the inlet wind velocity fluctuates in the range of 0.5 to 3.0 m/s, the overall dust mass concentration on the working face initially increases and then remains stable, but in the range of 2.5 to 3.0 m/s, the changes in the overall dust mass concentration and dust mass concentration of the respiratory zone on the working face are not significant. The dust pollution in the respiratory zone produced by the hydraulic support lowering pillar and moving frame on the working face is quantitatively analysed at different inlet wind velocities of 2.5 to 3.0 m/s to determine the optimum wind velocity for dust suppression on the working face. The optimum wind speed for dust suppression is 2.6 m/s. This study lays a foundation for the ventilation design and dust control in the early stage of a mine and for the establishment of a clean and green production mine.

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