VNII Galurgy Stock Co., St. Petersburg, Russia:
V. V. Buevich, Leading Engineer, buevich.v@bk.ru

Perm National Research Polytechnic University, Perm, Russia
N. V. Chekmasov, Associate Professor, Candidate of Engineering Sciences
D. I. Shishlyannikov, Associate Professor, Candidate of Engineering Sciences

National mineral-resources university “Gornyi”, St. Petersburg, Russia
V. V. Gabov, Professor, Doctor of Technical Sciences

There is reviewed the destruction process of potash massif by cutters of planetary-disk effectors of heading-and-winning machines “Ural”. There are described the main advantages and disadvantages of spatial planetary-disk effectors of up-to-date mining machines. It is pointed out that instability of cutting parameters – cutter spacing and depth of cut – cause high energy consumption and large amount of the fine non-benificated ore fractions (waste of the mining operations) in the breaking products during the potash massif destruction by the cutters of effectors of the heading-and-winning machines “Ural”. There are proposed the method and constructions of perspective planetary-disk effectors of heading-and-winning machines, which are effected potash massif destruction by crossing cuts. The results of experimental researches show that usage of cross configuration cutting for potassium salts, compared with traditional cutting configurations, allows to decrease specific energy consumption of destruction process of potash massif more than 20–25% and to decrease amount of fine non-benificated ore fractions in the freed ore more than by 2 times. There are proved technical decisions for upgrading of screw effectors of the heading-and-winning machines “Ural”. It is pointed out that the change of single-start screw for two-start screw will provide more uniform feed of mined rock on the conveyor of machine, reduction of its circulation and energy consumption for ore regrinding. Work scope expansion of machines “Ural” without caterpillar slip is possible while changing of rotation direction of breaking equipment in the opposite (from sole to the hanging side), in so doing mine face reaction forces on cutters will have directions, at which machine penetration force (power crowding) is decreased and application force of caterpillars to the sole is increased.

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