Extension evaluation on coal seam geological condition of coal face from the point of view of mining technology

The extension engineering method is combined with evaluation on coal seam geological condition of coal face from the point of view of mining technology. From the point of view of mining technology, the important geological factors which affect the mining work are took into account for evaluation. On the basis of matter-element theory, extension set theory and dependent function calculation, an extension evaluation model on coal seam geological condition is proposed. Lastly, the application of evaluation method is shown.