Improving efficiency of shearing and hauling machines in longwall potash mining

In operation of longwall systems in potash mines, capacity of shearers is limited by capacity of hauling machines—self-propelled mine cars. It is of the current concern to aim engineering and technology at efficient operation of shearers in potash mine. The principal relations in the standard calculation procedure of longwall shearer capacity in potash mining are presented and analyzed. It is shown that the longwall system capacity varies subject to haul distance. In the first section of longwall, the longwall system capacity equals capacity of a shearer. In the second section, the shearer operates with breaks for loading haulage cars; thus, the longwall system capacity is governed by the self-propelled car capacity. In the third section of longwall, the shearer is in idle mode in the period of car loading and in the period of waiting for vacant cars to be loaded. Thus, the longwall system capacity decreases as the face is advanced. It is suggested to improve the longwall system capacity by increasing the number of self-propelled cars and the haul distance in the longwall. Each follow-up self-propelled car approaches the operating shearer from the neighbor mined-out stope via a cross-passage made in the rib pillar. This engineering solution allows extending the productive work duration of shearers within the longwall systems and improves performance of potash mining.

Shishlyannikov D. I., Ivanov S. L., Zvonarev I. E., Zverev V.Yu. Improving efficiency of shearing and hauling machines in longwall potash mining. MIAB. Mining Inf. Anal. Bull. 2020;(9):116-124. [In Russ]. DOI: 10.25018/0236-1493-2020-9-0-116-124.

D.I. Shishlyannikov¹, Cand. Sci. (Eng.), Assistant Professor, e-mail: dish844@gmail.com,
S.L. Ivanov², Dr. Sci. (Eng.), Professor,
I.E. Zvonarev², Cand. Sci. (Eng.), Assistant Professor,
V.Yu. Zverev¹, Cand. Sci. (Eng.), Assistant Professor,
¹ Perm National Research Polytechnic University, 614990, Perm, Russia,
² Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.

D.I. Shishlyannikov, e-mail: dish844@gmail.com.

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