According to a large number of drilling and underground mining to expose information,inherent features of the 2nd coal bed in Xiayukou mine are discussed.

Application of Suspension Roof Support in Meiyukou Coalmine;

Research on the Exploitation of No.9 Coal Seam Menaced by Pressure Water in Taiyuan Xiyu Coal Mine;

Probe into the Coal Bed Threatened by Confined Water in Xiyu Coal Mine;

In connection with complexity of topography and geology in Xiyu coal mine, it expatiates applicative process of -dimensional earthquake -exploring technology from some aspects such as constructive methods outside, data processing and explored achievement etc The result indicates that the technique countermeasure and the achieved geologic effect is higher accuracy.

Review the Grinding-Classification Flowsheet in Dayukou Phosphorite Concentrator;