Authors: V.I. Klishin, Ye.A. Khudyntsev

Title of the article: Desining mechanized support complexes with coal release for underground development of thick coal seams

Year: 2022, Issue: 6, Pages: 96-106

Branch of knowledge: 25.00.22 Geotechnology (underground, open and construction)s

Index UDK: 622.273:274

DOI: 10.26730/1999-4125-2022-6-96-106

Abstract: To develop thick coal seams, a new direction for constructing mechanized supports with controlled sub-roof coal release was substantiated. New engineering solutions for creating such supports for flat and steep coal seams were introduced. They were all united by one idea, to set a feeder into a roof support unit. The feeder releases coal evenly over the whole area of the support unit window which is made in the mechanized support section. The productivity of the feeder is regulated in a wide range. A simultaneous operation of a feeder group on one face conveyor is provided by the technical solution. The number of feeders that operate in a group is defined by technical capability of an armored face conveyor. In this case, the coal-rock contact border goes down simultaneously, this provides area-managed release. The results of numerical computations and laboratory modelling of the process for releasing previously broken rock through an outlet window made in a powered support section are given. A numerical modelling of gravitational movement process of a previously broken coal by the method of discreet elements was carried out. The process of coal and adjacent strata release on the feeder installed in a mechanized support canopy were described. The results of the stand test and simulation tests of a coal release process were shown.

Key words: underground coal mining mechanized complexes method with release numerical modelling stand test simulation modelling

Receiving date: 12.11.2022

Approval date: 16.12.2022

Publication date: 27.12.2022

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