Determining displacement parameters of “Kletevaya” shaft axis over mined-out space

Albert Zubkov,Konstantin Selin,Sergey Sentiabov,I Rasskazov,S Tkach,S Kornilkov

doi:10.1051/e3sconf/20185602008

Abstract

The development of mineral deposits very often occurs in stages. First, open-cut mining, then underground one. At the same time, the arrangement of shafts is always problematic, when it is necessary to choose between security and economic efficiency. Design solutions always convince us that the main thing is safety, but is it really so? This article is the initial stage in the formulation of a very topical issue, in the opinion of the authors, which consists in developing a method for estimating and forecasting the change in the state of shafts during operation. Experimental work was carried out at "Gaiskoe" underground mine, where seven shafts are located in operation, located 100-200 meters from the collapse zone, the depth of the trunks is more than 1300 meters. The main purpose of the research was to determine the wandering from the vertical axis of the trunk at different depths.

Highlights

In order to accelerate the involvement of rich ore in exploitation and increase the capacity of the enterprise, the development of the mine was carried out in a combined way, with the combination of openpit and underground mining
The change in the parameters of the stress-strain state of the rock massif in time radically changes the notion of the regularities in the development of the processes of displacement of the rock mass to mined-out space, which necessitates a change in the approaches to the assessment of the location and parameters of the actual state of shafts and other capital mine workings
Instrumental measurements were made of the deflection of the shaft of "Kletevaya" mine from the vertical axis at various horizons, the value of which at the surface reached 400 mm, with permissible 198 mm for the depth 990 m

Summary

Introduction

The mine is represented by several isolated ore mines of complex lenticular and vein-like forms, differing in mineral composition. In order to accelerate the involvement of rich ore in exploitation and increase the capacity of the enterprise, the development of the mine was carried out in a combined way, with the combination of openpit and underground mining. The extent of the horizons at the first stage of the autopsy (with a deck height of 60 meters) was 170-440 meters. When designing the second stage of the mine, it was planned to increase the production capacity several times by using self-propelled equipment. In the intermediate horizons (510, 590, 670 meters), ore from blocks was delivered using self-propellered LHD to ore passes, the ore was transferred to production level (685 meters) and transported to the shaft in wagons

Objectives

Findings

Conclusion