The Research in the Use of Monolithic Concrete for the Mine Construction

Abstract

The aim of the work is to study the use of slag aggregate concrete for the construction of monolithic concrete lining of mine workings. In the coal industry the average of 10-15 m of development workings are constructed to extract 1,000 tons of coal. The monolithic concrete is 97-98% of the total material consumption for the construction of vertical shafts in Kuzbass; lining costs being 50% of the total cost of shaft construction, which are directly dependent on the material consumption and cost. Considering the amount of annually produced coal in Kuzbass mines, it becomes obvious that the cement consumption in the industry amounts to several million tons, the consumption of the aggregates is about ten million cubic meters. It was found that 25-30% of concrete-lined mine workings are relined annually. This is due to the concrete destruction under the influence of unfavorable operating conditions, especially the destructive action of mine water. Therefore, the problem of production of concrete capable of withstanding these phenomena seems quite relevant.

Increase of the Frame Support Yield Load by Full Filling of Behind-Anchoring Space with Grout Material

“…Skin grouting technologies and rock mass injection hardening [1][2][3][4][5][6][7][8] in combination with traditional types of supports were used in many mines of Kuznetsk Basin. Main reason for constraining application of injection hardening as a method to improve stability of mine workings [9][10][11][12][13][14][15] are the lack of geo-mechanical substantiation for excavation support considering grout mix water loss under pressure, the lack of structures and technology for construction of insulating shells around workings, as well as workable grouting complexes for injection operations Since most geological conditions of Kuzbass are complicated, the tasks outlined in the article are relevant.…”

Predicting the Durability of Concrete Structures, including Sulfate Corrosion of Concrete

“…Рахимбаева, С.Н. Леоновича [6,[10][11][12][13][14][15][16][17][18][19][20][21][22] были описаны различные механизмы взаимодействия цементного камня с агрессивной средой. Предлагалось долговечность железобетонных конструкций определять по изменению концентрации гидроксида кальция или других компонентов, входящих в химический состав цементного камня.…”