Effect of the form of an underground opening and types of support machine utilization for construction of underground spaces in the coal mines

Duško Đukanović; Miodrag Denić; Dušan Dragojević

Duško Đukanović JP PEU, Belgrade, Serbia
Miodrag Denić JP PEU, Resavica, Serbia
Dušan Dragojević JP PEU, Belgrade, Serbia

Keywords: shape of the underground rooms; support; mine; machine; coal

Abstract

In JP PEU mines, primarily in the mines 'Lubnica', 'Soko' and 'Rembas', designed to open new mining fields and ditches, where the total length of projected space about 26000 m. The most common form of cross-section is a circular underground chambers (66%), a suburb steel circular permissive diameter φ = 3.5m, with a light cross-sectional area of 9.62 m². What would be designed premises for drilling-only demolition will result in significant delays in opening new production facilities, it is necessary to consider the possibility of mechanized construction of underground spaces. Introduction of mechanized construction of underground spaces in the mines JP PEU, it becomes a question of justification of the current forms of underground rooms and type of support. One of the alternative proposal is that instead of a circular underground room used arched form, and instead of circular steel roof supports, to use the combined support. Mixed-timbering in this case includes a built-in steel support on a larger axial distance in combination with anchors that are installed between the steel support frame. Based on the above proposals, in this paper deals with the influence of the shape of underground facilities and the types of support on the use of machines for underground coal mines.

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