Yong-kui Shi

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Considering the main affect factors of displacement of rockstrata around deep roadway under dynamic pressure, using PSO-BP and BP network respectively to forecast the displacement of rockstrata around deep roadway under dynamic pressure. As a result, it comes to a conclusion that the convergence speed and the predicted accuracy of PSO-BP network are(More)
The forecast of logistics cost is the prerequisite and foundation for logistics cost management in coal enterprises. This paper has analyzed the logistics cost in coal enterprises and its influencing factors, using PSO-BP and BP network respectively to forecast the logistics cost in coal enterprises. As a result, it comes to a conclusion that the(More)
Original scientific paper With the increase in mining depths and the occurrence of worsening conditions, deep, large-scale and rapid mining may lead to more complicated dynamic features for tunnels, making them vulnerable to dynamic disasters such as rock bursts and coal/gas outbursts with subsequent heavy damage and casualties. A three-dimensional(More)
A prediction method of coal and gas outburst was presented based on the combination of attribute reduction function of rough set theory and nonlinear mapping characteristics of support vector machine. Firstly, attribute reduction and denoising were executed. Secondly, the training samples that have been processed were input to the support vector machine to(More)
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