Testing of shearing machines in shale mines

Abstract

At present the industry of the Soviet Union mass-produces only Ural-33 type punching machines, which are used in those mines, where it is impossible to use harvesters. With the existing technology of oil shale mining, the undercutting is made at the bed soil (on the third layer of oil shale) by the machine “Ural-33” with a two-meter bar, with a useful furrow of 1.9 m ...