Article
Engineering, Environmental
Zihao Xiu, Wen Nie, Peng Cai, Dawei Chen, Xu Zhang
Summary: A new type of partially enclosed air curtain device for dust control is proposed to mitigate the effect of coal dust on worker health and the work environment. Numerical simulation results show that the device effectively forms a partially enclosed dust control air chamber in the shearer driver's working area, preventing dust from entering and reducing dust concentration. It also decreases the diffusion distance of ultra-high-concentration dust, improving the working environment for coal mine operators and providing new ideas for dust prevention in restricted spaces.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Shuzheng Song, Gang Zhou, Jinjie Duan, Lichao Zhang, Danhong Gao, Biao Sun
Summary: Through numerical simulations, it was found that 2500m³/min is the optimal dust-exhausting airflow volume for controlling gas-respirable dust concentration effectively. The distribution of RD remains similar under different airflow volumes. The numerical simulation results show a high reliability with small discrepancies compared to field measurements.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Guobao Zhang, Biao Sun, Shuzheng Song, Hao Wang, Gang Zhou
Summary: The study reveals that turbulent airflow from coal cutting (TACC) significantly influences the pollution characteristics of coal dust by enhancing turbulent intensity and inducing positive airflow deviation.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Green & Sustainable Science & Technology
Hao Wang, Weimin Cheng, Zhanyou Sa, Jie Liu, Ran Zhang, Dawei Chen
Summary: The air volume ratios (γ and φ) have significant influences on the dust cleaning efficiency of the air curtain, with appropriate values of γ and φ leading to continuous improvement of airflow dust cleaning ability, the optimal ratios being γ=0.5 and φ=9:1. The optimized air volume ratio can effectively enhance the dust cleaning efficiency of the operating region and guarantee clean air and workers' safety.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Wen Nie, Xu Zhang, Huitian Peng, Dawei Chen, Tao Du, Bo Yang, Chengyi Liu
Summary: The development of coal industry is limited due to dust pollution. Air curtain dust control technology has been proposed as a solution to this issue. A combination of numerical modeling and field tests have been used to study this technology, showing its effectiveness in controlling dust and providing useful data for dust control technology in fully mechanized mining faces.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Chemical
Changgeng Gui, Fan Geng, Junhua Tang, Hongwei Niu, Chun Liu, Haixu Teng, Xinyue Feng, Shuda Hu, Shihang Li
Summary: The study found that the airflow of the air curtain evolves with time and space, significantly impacting the surrounding flow field. Increasing the initial supply air velocity and reducing the inclination angle of the air curtain can effectively decrease the concentration of PM2.5 at the driver's seat.
Article
Engineering, Chemical
Xianhang Yang, Haiming Yu, Yuhuan Wang, Weimin Cheng, Chuangen Hou, Yuxi Ye
Summary: In this study, a modularized airflow-diverging system and dust-control technology were proposed to address the serious dust pollution caused by cutting operations in fully mechanized headings in coal mines. A coupling model of airflow and dust was established, and the influence of different side outlets, inclination angle, included angle, and radial-to-axial airflow volume ratio on the diffusion of airflow and dust was simulated and studied. The results showed that the proposed system effectively prevented dust diffusion and reduced dust concentration.
Article
Environmental Sciences
Gang Zhou, Yu Ma, Ruixin Song, Yating Hu, Yongwei Liu, Bingyou Jiang, Biao Sun
Summary: To understand the dust dispersion and pollution laws in coal-oil shale mining faces, simulation and analysis of airflow distribution and dust emission were conducted. It was found that coal dust particles were concentrated near the roof of the hydraulic support, while oil shale dust particles were mainly below the breathing zone. Both coal and oil shale dust particles heavily polluted the areas near the shearer drum. Wet dust collectors and multi-nozzle atomization devices were designed to remove the dust effectively, with removal rates of 83.4% and 87.5% respectively.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Zihao Xiu, Peng Cai, Dawei Chen, Wen Nie
Summary: A convection-type air curtain dust control system and method were proposed to effectively control the high dust concentrations generated during the operation of coal miners and hydraulic supports. The effectiveness of air curtain dust control during single process operation was investigated through numerical simulation. The results showed significant differences in dust concentration inside and outside the dust-proof air curtain, with lower concentrations in the area where the miner was operating. The reduction of dust after equipment opening can improve the working environment and reduce the probability of dust combustion and explosion accidents.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Zihao Xiu, Peng Cai, Dawei Chen, Wen Nie
Summary: This study proposed a convection-type air curtain dust control system and method and investigated the effectiveness of dust control during single process operation through numerical simulation. The results showed that this method can effectively control high dust concentrations generated during coal mining, improve the working environment, and reduce the probability of accidents.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Gang Zhou, Yongwei Liu, Yang Kong, Yating Hu, Ruixin Song, Yichun Tian, Xianchao Jia, Biao Sun
Summary: This study numerically simulated the dust migration law under ascensional and descensional ventilation conditions and proposed corresponding automatic spray control schemes. The results showed that dust migration distance and difference increased with time under both ventilation conditions, and the impact on the breathing belt was different.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Gang Zhou, Yating Hu, Ruixin Song, Biao Sun, Yongwei Liu, Yang Yang
Summary: Numerical simulation research on the airflow-dust-gas field of the fully mechanized driving face was conducted to determine the optimal dust and gas exhaust air volume. The results prove the reliability of the simulation and provide the optimal air volume range.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Chuangen Hou, Haiming Yu, Xianhang Yang, Weimin Cheng, Yuhuan Wang, Yuxi Ye
Summary: In this study, a dust removal technology of large eddy dust collecting and swirl airflow distribution was investigated to address the problem of dust pollution at the fully-mechanized excavation face. The results demonstrated that the new technology can effectively remove dust and greatly improve the working environment.
Article
Environmental Sciences
Wen Nie, Yun Hua, Weiwei Zhou, Qiang Liu, Xiaojiao Cai, Lei Cheng
Summary: This study investigated the dust suppression technology of the forcing air curtain in fully mechanized rock tunnelling faces in coal mines. The research introduced the mechanism of dust diffusion controlled by the forcing air curtain and conducted numerical simulations to analyze the formation of the forcing air curtain and its influence on dust diffusion. In addition, a dust suppression technology using the forcing air curtain was designed and tested in a coal mine tunnel, showing promising results in reducing dust concentrations.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Hao Wang, Zhanyou Sa, Weimin Cheng, Ran Zhang, Shuai Yang
Summary: The study found that adjusting the forced-air volume and suction region position in fully mechanized tunneling process can enhance air curtain migration and dust suppression effects. By reducing the forced-air volume and placing the suction region in specific locations, the dust pollution area can be effectively decreased to achieve optimal dust suppression performance.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)