Determination of economically viable option of liquidation the consequences of external dump deformation

Abstract

The safety factors for different variants of operation development were obtained, on the basis of which the technical and economic indicators were established and the most expedient way of restoration of dump operations in conditions of the formed landslide was chosen. The solutions were proposed for the external dump No 2 of the Central Ore Mining and Processing Enterprise (COMPE), that allow to continue its future operation. When working in the conditions of the formed landslide, three variants of the further dump operation are modeled: the first one - with landslide removal and unloading of the upper dump horizons, the second one - without landslide removal and involvement of disturbed lands in land allotment, the third one - with the landslide loading. Based on the built sections of the dump and defined physical and mechanical properties, the stability factors were obtained for different options of the operation development, which made it possible to determine the appropriate option to eliminate the effects of the dump slide deformations. As a result of the calculations, the cost flows for each of the proposed options of the formation of the end contour of the dump No 2 are determined.

Substantiating the rational parameters for a complicated non-transport system when mining low-thickness fireclay deposits

“…The criterion for assessing the effectiveness of the proposed mining system is the specific cost for strip-mining of 1 m 3 [19,20,21,22]. Therefore, we will calculate all cost items for this stripping site, and based on the obtained data, construct a histogram for calculating unit costs for mining the Zakhidnyi Quarry No.1 site (Fig.…”

The development of technology schemes of formation of external dump of different types of rock in landslide conditions

“…At the dump No 2, overburden rock is accepted at 2 dump dead ends and is dumped with the help of ЕКГ-8І and ЕШ 10/70 excavators. At the moment, ЕШ No 1 is removed from the danger zone at a distance of 100 m after the occurrence of deformation in the form of a landslide [7,8].…”

“…Thus, in 2017 on the site of the south-western side of the dump in s.a. 170 -220, hor. +175 ... + 125 there were deformations manifested in the form of landslide with the following parameters [7,9]: a) length along the edge -410 m; b) average depth -7 m, maximal -12 m; c) the average landslide -10 m; d) volume is 850 thousand m 3 ; e) the area of landslide spread is 85 thousand m 2 .…”

“…1). According to the first variant, it is necessary to remove the rocks from the landslide array in such a way as to be able to restore the inspection road in the existing contours of the land allotment and to build a drainage ditch [7].…”

“…The prism is formed by a bulldozer. The number of dump trucks is the same as in the first variant, taking into account the length of transportation and productivity of the excavator placed at the reloading point of the dump [7].…”