Optimizing of Coal Dust Prevention Project Based on Dust Properties7
Coal dust is still serious in China, and people died from pneumoconiosis is twice more than that of accidents, research on optimizing anti-dust measures is significant. Advanced instruments, such as 9306 handheld laser particle counter, 8533 DUSTTRAK DRX Aerosol Monitor, Digital Anemometer, JZYW-200B interface tension meter, dust generation and simulation device and anti-dust system, were used in the study. Physical and chemical properties of coal dust of one fully mechanized coal mining face had been analyzed, and anti-dust measures of the working face were evaluated and optimized. Some problems of the inhere measures were found: large proportion of the small size dust of 0. 3 to 5μm, high concentration of respirable dust and inefficient measures for dust laying as spray, water curtain and others existing made pneumoconiosis a serious threat; the great surface tension of water for coal injection and dust prevention led to large coal-water contact angle, which reduced the effect of coal injection and dust prevention; large wind velocity on working face raised dust obviously, and the dust concentration of the monitoring points on working face was 10 times more than the standard. Based on dust properties experimentally derived, some measures were taken to optimize coal injection and dust prevention, such as: improving nozzle characteristics and spray pressure, adding surfactant to water, using wet vibrating fiber grid, optimization of wind speed and some others. As a result, the dust concentration of monitoring points is reduced to 20％ at most, which improve the working face environment greatly.
coal dust basic properties working face prevention project optimization
ZHANG Jiang-shi ZHAO Yong-guang LI Tian-yang LI Hai-peng
School of Resource & Safety Engineering, China University of Mining and Technology, Beijing 100083, School of Resource & Safety Engineering, China University of Mining and Technology, Beijing 100083,
国际会议
The 2nd International Conference on Mine Safety and Environment Protection(第二届采矿、安全与环境保护国际会议)
西安
英文
149-153
2011-10-10（万方平台首次上网日期，不代表论文的发表时间）