Influence of shearer operation flow chart and longwall length on specific energy consumption of scraper conveyor in fully mechanized working face

The influence exerted by the shearer operation flow chart and the longwall length on the specific energy consumption of a scraper conveyor in the fully mechanized working face in gently dipping coal seams is studied for the energy efficiency evaluation. Power consumed in mining and haulage of coal in fully mechanized longwalls amounts to 12–16% of the total energy consumption in a coal mine. For this reason, it seems important to analyze the influence of process conditions of equipment and parameters of longwall face on the specific energy consumption of a scraper conveyor. The procedure developed for the calculation of the specific energy consumption improves accuracy of capacity and performance of a fully mechanized longwall face with regard to specific features of energy consumption. The article presents a case-study of longwall face in coal seam 19 in Kostromovskaya Mine of MMK-Ugol, at mining height of 2 m. The dependences of the specific energy consumption by AFC on the longwall length and the shearer operation flow chart are determined. It is shown that with increasing length of the longwall from 200 to 500 m, the specific energy consumption of the scarper conveyor grows from 0.64 to 1.4 kW h/t in case of one-way operation of the shearer and from 0.53 to 1.25 kW h/t in case of shuttle operation of the shearer, or decreases from 3.2 to 2.8 kW h/r km and from 2.65 to 2.5 kW h/t km in one-way and shuttle operation of the shearer, respectively. The shuttle operation of the shearer improves the energy efficiency of the scraper conveyor by 11–18% as compared with the one-way flow chart owing to higher load of the conveyor. The share of the specific energy consumption of AFC in the total specific energy consumption of the shearer–conveyor system grows from 25 to 56% with an increase in the length of the longwall from 200 to 500 m.

Babokin G. I., Shalloeva V.A. Influence of shearer operation flow chart and longwall length on specific energy consumption of scraper conveyor in fully mechanized working face. MIAB. Mining Inf. Anal. Bull. 2021;(3):167-176. [In Russ]. DOI: 10.25018/0236_ 1493_2021_3_0_167.

G.I. Babokin¹, Dr. Sci. (Eng.), Professor, e-mail: babokinginov@yandex.ru,
V.A. Shalloeva¹, e-mail: gotovtseva.va@misis.ru,
¹ National University of Science and Technology «MISiS», 119049, Moscow, Russia.

G.I. Babokin, e-mail: babokinginov@yandex.ru.

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