Modern portal support for slopes

Vladimir Pershin,Qiao Wei-Guo,Pavel Budnikov,Q Yao,L Chen,S Chen,W Qiao,S Gao

doi:10.1051/e3sconf/202130301026

Abstract

In view of the problem of the portal support of a slope, this paper summarizes four arch barrings, their main structure characteristics and disadvantages are analyzed, then a new design of in-situ reinforced concrete barring is developed for the slope mouths, the cost of barring materials and the wage of the pitmen are determined by comparing several barring structures used to support the mouths of inclined shafts.

Highlights

In Kuzbass constructing mines are developed by inclined shafts
In accordance with the stress diagram in the barring of the mine developments, maximum bending moments Мb occur in the middle of the vertical and curvilinear upper parts of the barring with zero values in the zone between the ends of the reinforcing meshes 5 and 7 and the nodes 1 of elements 2 and 3 arise of the metal arch barring; maximum stretched stresses occur only in the reinforcing meshes 6 and 6, this allows to reduce the size of the special section and the number of support frames
The final stage of our experiment was devoted to calculations of the economic effect from labout inputs reducing while constructing the reinforced concrete barring of the mouth, as well as the cost of barring materials and the wage of the pitmen is determined by comparing several barring structures used to support the mouths of inclined shafts for the same geological conditions

Summary

Introduction

In Kuzbass constructing mines are developed by inclined shafts. The shaft collars are fixed by in-situ reinforced concrete barring.When choosing the structure of the portal support of an inclined shaft the main factor is the method of construction (by open pit and mining), as well as the mining and geological conditions for location of the mouth of inclined shafts. They include the unsatisfactory work of the barring from the development roof support in the longitudinal direction; an increase in the metal consumption of barring structure, while ensuring its required bearing capacity through the use of flexible reinforcement; unequal strength of the structure due to the presence of overloaded barring elements; susceptibility to corrosion of the taken out profile SIP.

Results

Conclusion