Study On Relation Of Coal Bed Cutting Strength Variation And The Energy Cost Of Shear

During conduct quantitative express to mechanics nature of work face coal,cutting strength is the most dependable comprehensive norm. The design of device of measuring coal cutting strength is one of dissertation. Making use of span variation law of cutting strength of coal bed working surface cut down consumption of energy of shear.Owing to the effect of backwall pressure,make coal bed cutting strength occur variation. In this dissertation taking advantage of measuring curve of cutting strength,and consideringdestructive action of backwall pressure,determine shear cuttingdepth of both the smallest consumption of energy and the biggest working surface productivity. Making use of measuring cutting strength carry out force analysis on picks,and taking advantage of ANSYS make analogy on picks of the shear.