Tensile reinforced concrete chute lining structure

Abstract

The invention discloses a tensile reinforced concrete chute lining structure which comprises a plurality of lining units and steel grooves. The lining units are connected end to end to form a ring-shaped reinforced concrete structure, the steel grooves are arranged at the two ends of the lining units, the lining units are in an arc shape, a reinforcement cage framework is arranged in the lining units, each steel groove comprises an integrated back plate and guard plates on the two sides of the back plate, the back plates of every two adjacent steel grooves abut against each other, and a deformation joint is formed between the back plates of every two adjacent steel grooves. The traditional stress concept of the lining is changed, concrete and steel bars in the lining separately work and stress, the pressure bearing performance of the concrete and the tensile performance of the steel bars are exerted, the tensile effect of the lining is remarkable, and construction is convenient.

Description

technical field [0001] The invention belongs to the technical field of mine chute engineering, in particular to a tensile-type reinforced concrete chute lining structure. Background technique [0002] The chute is a mine tunnel project that uses its own weight to slide ore from top to bottom. It is used as a throat project for underground metal mines to store and transport ore rocks. Whether it is stable or not will directly affect the normal production of the mine. In the process of production and use, due to engineering geological conditions, linkage damage effect of group wells, excessive ore unloading impact load, insufficient shaft support strength and other reasons, the slide shafts have different degrees of wear and tear or even collapse, which seriously restricts the safe and stable production of mines. . At present, the reinforcement and support forms of domestic mine shafts mainly include plain (reinforced) concrete, steel rails, (manganese) steel plates, high man...

AI Technical Summary

Problems solved by technology

In order to improve the impact resistance and wear resistance of concrete in some mines, reinforced concrete reinforcement is still not effective, but it is more likely to cause ore to block the shaft and wear faster

Existing studies have shown that the failure of the chute is mostly tensile (shear) failure, while the tensile and shear resistance of plain concrete is low. Under the influence of surrounding rock fragmentation, expansion pressure, and insufficient filling of the void behind the wall, the plain poured well wall is easily damaged. shear and tensile failure

Although many mines use steel rails and (high) manganese steel plates to increase the strength of the shaft wall at the impact point, these rails and steel plates are often fixed by spot welding, and their fixing strength is low

Even if fixed methods such as anchors or rooting hooks are used, it is still easy to crack and fall off after being subjected to strong impact and vibration, and even cause side effects such as blockage of the chute, which accelerates the deformation and destruction of the wellbore

High-manganese steel plates have poor weldability and reworkability, high reinforcement costs, and labor-intensive installation and handling. They are generally used in large mines

However, the application cases and experience of new reinforcement technologies such as rubber lining, steel fiber sprayed concrete, resin concrete manganese steel plate, and rare earth wear-resistant steel reinforcement are insufficient, and further exploration and practice are still needed.

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