To adopt white light digital speckle correlation method, so as to observe the coal body's deformation and destruction law in pick cutting course.
采用白光数字散斑相关的方法，观测截齿截割作用下的煤体变形破坏情况。
According to the compressive strength of coal rock mass, the paper provided the calculation formula of the pick cutting force during the coal cutting operation.
根据煤岩体的抗压强度，给出了镐形截齿破煤过程中截割力的计算公式。
The damage styles of cast-in cutting pick and hard-solder forging cutting pick are analyzedaccording to the comparing experiment under coal mining well.
通过井下采煤对比试验，分析了镶铸截齿与锻造针焊截齿的损坏特点。
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