Key Laboratory of mine thermal hazard and control of Ministry of Education

Fuxin, China

Key Laboratory of mine thermal hazard and control of Ministry of Education

Fuxin, China

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Li Y.-C.,LIAONING Technical University | Li Y.-C.,Key Laboratory of mine thermal hazard and control of Ministry of Education | Liu T.-Q.,LIAONING Technical University | Liu T.-Q.,Key Laboratory of mine thermal hazard and control of Ministry of Education | And 4 more authors.
International Journal of Earth Sciences and Engineering | Year: 2015

In this paper, to solve the problems about the heavy pollution of dust and harmful gas in long-distance blind-heading face, the wind library transit relay technical parameters of local ventilation are studied. It studies the relationship about the main technical parameters of wind library transit in the long-distance blind-heading excavation. The determination method of the position of wind library which is under the condition of reasonable fresh air transit is studied. Moreover, it derives the relationship formula among different levels of multi-level wind library transit relay parameters. By analyzing a real example of Xiyi slope roadway about the long-distance wind library ventilation transit, the optimization program is determined and the specific location of the wind library is also calculated. After comparing the air volume and the wind speed data at the working face before and after the adjustment, we find that, based on the reasonable wind library arrangement, the ventilation transit relay technology can effectively improve the operating environment at the long-distance blind-heading working face. © 2015 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.


Li Y.-C.,LIAONING Technical University | Li Y.-C.,Key Laboratory of mine thermal hazard and control of Ministry of Education | Liu T.-Q.,LIAONING Technical University | Liu T.-Q.,Key Laboratory of mine thermal hazard and control of Ministry of Education | And 6 more authors.
International Journal of Earth Sciences and Engineering | Year: 2014

In order to study the influence of different coal quality indexes on the flame length of coal dust explosion, the coal quality index identification instrument and explosive identification instrument of coal dust samples are used to measure the moisture, ash content, volatile, fixed carbon content and the ignition point of coal dust cloud. After calculating the correlation coefficients among these measured data of coal quality indexes, we find that there is a high correlation among these coal quality indexes which can make an impact on the length of flame when coal dust explodes. In this regard, we select the coal quality indexes of nine coal dust samples, and the method of principal component analysis, which is a kind of method of multivariate statistical analysis, is used to extract principal components of coal quality indexes which make an impact on the flame length of coal dust explosion. We analyse the meaning of the principal components, select "the volatile factor", "the factor of ash content and fixed carbon" and "the factor of moisture and ignition point factor" as three principal components, proving the impact of different coal quality indexes on the flame length of coal dust explosion from the aspect of data analysis. We perform a regression analysis using the data of principal components and the flame length of coal dust explosion, we also test the regression model using measured data of a kind of coal sample’s coal quality indexes, the result shows that the principal component regression model is good enough to be used to predict the flame length of coal dust explosion. © 2014 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.

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