Compression test study of concrete supporting structure in open-pit coal mine
WU Dengchao
YANG Benshui
Abstract：To improve the safety of the concrete support structure in open-pit coal mines,it is necessary to an-alyze the compressive performance of the concrete support structure.This paper proposes a test method for studying the compressive performance of concrete support structures in open-pit coal mines.By analyzing the concrete support structure,the force situation of the concrete support structure in open-pit coal mines is stud-ied.The compressive performance of the concrete support structure in open-pit coal mines is analyzed under different curing temperatures,water-cement ratios,and spraying methods.The results show that the strength of the concrete is better under the curing condition of 45°C.However,when the concrete support structure is cured at a temperature that is too high,its strength is at a disadvantage compared to the strength value under standard curing conditions.Moreover,increasing the water-cement ratio continuously improves the compressive strength and porosity of the concrete support structure in open-pit coal mines.Wet-sprayed concrete is superi-or to dry-sprayed concrete in terms of compressive strength,tensile strength,and flexural strength.
Keywords：opencast coal mineconcrete supporting structurecuring conditionswater-cement ratiodry and wet shotcrete
Publication Date：2024-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 26-31 )