????? ?? ????? ???? ?????? ??? ???? ??? ????????? ???? ?? ?????? ?? ?????? ????? ?? ???? ?????? ????? ??. ???? ???? ???? ?????? ??????? ?? ??? ???? ?? ?????? ?? ????? ??????? ?? ???? ????? ??. ???? ???? ?? ???? ?? ?????? ??? ??? ???? ?? ??? ?????? ?? ??? ????? ????? ???? ??? ????? ??. ??? ???? ??? ???? ????? ?? ????? ?????? ???? ??? ?? ??? ??? oo ???? ?? ???? ?? ??? ?? ??? ???? ?? ?????? ??????? ?? ???? ??. ????? ??????? ?? ?? ???? ?? ???? ?? ???? ?????? ?? ???? ????? ??, ???? ?? ????? ???? ???? ?? ??? ?????? ?? ???? ????? ??, ?? ?? ???? '?? ???? ?? ???? ?? ???? ????? ?? ??? ?? ??? ???? ???? ????? ?? ???? ????? ??. ?? ???????? ??? "?? ???????" ???? ????? ??.

In the longitudinal direction, the differential movement of the bed surface, at first at a slow speed and gradually accelerate, to the maximum speed when the sudden retreat, the speed gradually decreases during the retreat process, and then forward, repeat the above process, not only promote the loose stratification of the ore layer, but also make the heavy ore particles move forward along the longitudinal at a larger speed, so that the light ore particles move forward at a smaller speed. ???? ??? ?? ?? ??????? ??? ??? ????????? ??? ?? ????? '?? ????? ???? ??. ???? ?????? ???? ???? ????????? ???? ??? ???? ??????? ??? ??? ???? ?????? ?? ???? ????????? ???? ??? ???? ??????? ??? ????? ??.

??????? ??? '?? ???? ?????? ?? ????????? ??? ???? ?? ???????? ???? ???? ???? ?????? ?? ????? ????? ??? ????? ???? ??, ??? ???? ???? ???? ????? ?????? ???? ??. ?? ???????? ??? "?????????? ???????" ???? ????? ?? .???? ??? ???? ???? ???? ???? ???? ?? ????? ??, ???? ?? ????? ?????? ?????? ???? ?? ???? ?? ???? ?????? ???? ???.?

???? ?? ????? ??? ??? ???? ?????? ??? ?????? ??? ?? ????? ????? ?? ??? ?????? ?? ??? ?? ?????? ????? ?? ??? ????????? ?? ??? ????? ??????? ??, ??? ???? ?????? ??? ???? ??????? ?? ????? ????? ??. ?? ??, ???? ???? ?? ??? '?? ???? ???? ????? ??????? ??? ??? ??? ?? ?? ???? ?? ?????? ??? ???? ????????? .??? ???????? ??, ??? ?? ?? ?????? ?? ????? ?????? ???? ?? ???.

???? ?? ??? ?? ??????? ???? ???? ????? ???? ?? ???? (?????? ?? ?????? ????) ???? ????????? ??? ??? ???? ????? ??, ??? ?? ?? ???? ??? ??????? ???? ????? ????? ??, ??? ???? ??????? ???? ????? ??.


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