Authors: E.V. Ignatov

Title of the article: The state and main tasks of development of the longwall mining system on the coal mines of Kuzbass: a brief review

Year: 2019, Issue: 4, Pages: 30-49

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

Index UDK: 622.272.4:622.273

DOI: 10.26730/2618-7434-2019-4-30-49

Abstract: The main system of development of medium-thickness gentle seams in Kuzbass is a longwall system with division of a floor (panel) into sublevels (tiers) and development of the latter in descending order. Between the sublevels are left sub-level blocks of 5÷20 m. On one seam from 1 to 4 extraction fields are developed, in each of which 1÷2 walls is in operation. There are usually two inclined transport workings within the extraction field; they also serve for ventilation and communication. At present, the development is concentrated mainly in dip-working panels.
The effectiveness of a board-and-pillar mining system is largely determined by the preparation scheme and the order in which the walls are operated. The latter determines the method of protection of the drifts, the intensity of impact on the support pressure of the mine, the location of the preparation workings relative to the boundaries of the worked-out space, the duration of their maintenance, and the control of gas and water discharge.
Known truths are the variability of mining conditions in the basin, at the mine and seam, the length of the extraction panel and the relationship of this with the form of manifestation of mining pressure. In addition, if in the production face, at the current level of its element base development, it is not possible to make adjustments to its parameters in the process of mining, then in the workings out at non-pillar seam development it is real. For this purpose, it is necessary to create scientific and technological support.

Key words: underground mining non-pillar seam mining board-and-pillar mining system extraction section

Receiving date: 23.09.2019

Publication date: 31.12.2019

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