Authors: E.A. Khudyntsev, S.V. Klishin, V.I. Klishin

Title of the article: Researching powered support feeder for extracting thick flat-lying seams with controlled coal release

Year: 2022, Issue: 2, Pages: 31-38

Branch of knowledge: 05.05.06 Mining machines

Index UDK: 622.23.05

DOI: 10.26730/1816-4528-2022-2-31-38

Abstract: The Institute of Coal of FRC CCC SB RAN introduces a new direction for constructing powered supports meant for implementing the technology of developing powerful flat seams with the controlled sub-roof coal release on the face conveyor. This technology allows increasing rock mass production, decreasing the losses, coal ash-content, and providing safety mining. This support is supposed to be used in the equipment set during the process of steep and steeply inclined seams development applying the system of sub-level top caving. The basic element of the powered support is a controlled feeder. A releasing window in the form of a chute with the installed feeder is done in the protecting wall of the support. Its parameters define the effectiveness of a thick flat seams development method. A feeder should control the coal release throughout the whole support opening equally. The productivity of the feeder is regulated in a wide range and it conditions the simultaneous operation of a group of feeders on one face conveyor. The influence of feeders configurations, installed into a roof support canopy on roof coal release production has been demonstrated by theoretical research with discrete element method and laboratory bench testing. The forces that influence on a feeder and coal mass rate in the process of rock mass release have been calculated.

Key words: feeder controlled release numerical simulation laboratory bench testing

Receiving date: 15.01.2022

Approval date: 15.03.2022

Publication date: 15.05.2022

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