Mechanics Analysis And Experimental Study On The Impatct Cutting Of Coal

In the first part of text, it describes the feasibility of impact coal-rock cutting and three advantages of impact shear. High lump producing rate, low dust-producing rate and low energy, by the analysis of conventional dumb shear and existing theory. After that, it analyzes the characters of coal-rock, including its physical character and transmitting characteristic of stressing wave. On the basis of those, I do some academic and experimental analysis on the action of cutting mechanics and influencing factors of cutting effects., such as , the studies of mechanical behavior of coal-rock when it was impacted ,the establishment of mechanical model, the analysis of how some factors affect the cutting effects, the conform of rational impact-split thickness and impact cutting tool shape, and so on. In the last parts, it indicates the deficiency of the text and offers some advises on how we should do to design the cutting machine and perfect the theory of impact cutting.