A method of manufacturing reinforced concrete pillars for mine roadways

Abstract

A manufacturing method of reinforced concrete pillars for mine roadways includes: designing and manufacturing a reinforced concrete pillar into a plurality of prefabricated members different in specification, including a base, a transitional segment, a main bearing segment and a main bearing roof-contact segment; the main bearing segment is composed of a plurality of segments; every two adjacent prefabricated members are in inserted connection through composite steel casings buried in the prefabricated members. The defects such that the pillars cast in place on a coal roadway is collapsed in the curing phase and the pillars heavy in weight and integrally cast on the ground are difficult to carry and erect are overcome; the pillars are imparted sufficient bearing strength, the ability of the pillars to adapt to roadway height, surrounding rock pressure and surrounding rock strength is comprehensively considered, a whole is broken into segments for separate manufacturing, and the pillars are high in strength and convenient to mount and demount, transport and erect.

Description

technical field [0001] The invention relates to a manufacturing method of reinforced concrete pillars in mine tunnels, in particular, the reinforced concrete pillars are designed and processed into several prefabricated parts of different specifications and standards, including a base, a transition section, a main load-bearing section and a main load-bearing section connected to the top, wherein the main The load-bearing section is composed of several sections, and the two adjacent sections of standard prefabricated parts are inserted through the embedded steel primary and secondary casings, which is used for mine roadway height, surrounding rock pressure and surrounding rock strength changes and has strong adaptability. How to make reinforced concrete pillars. Background technique [0002] In the support process of the existing mine roadway, high-strength, low-cost, non-recyclable support structures are needed to control the deformation and damage of the surrounding rock of...

AI Technical Summary

Problems solved by technology

[0003] There are two methods for making reinforced concrete pillars used in existing mine roadways: one is integral pouring on site, which can be completed only by pouring molds and reinforced concrete materials, but this method has many disadvantages. The space is narrow, and the on-site pouring work is relatively difficult; the second is that the initial strength of the pillars made by pouring is low, and due to the rapid deformation of the surrounding rock of the high-stress roadway, the pillars are crushed during the drying and maintenance process and lose their supporting functions; the third is on-site pouring The cross-section of the pillar is generally determined according to the pressure of the roof. Often due to the insufficient cross-sectional area of ​​the pillar, it is inserted into the soft floor layer under the pressure of the surrounding rock and loses its supporting function. If the method of increasing the cross-sectional area of ​​the pillar is adopted to solve this problem The problem will lead to an increase in production costs; Fourth, the casting mold has poor adaptability to changes in the height of the roadway, and the effect of connecting the pillars to the top is not good

[0004] Another method is the integral pouring method on the ground. This method has a wide manufacturing space, sufficient maintenance and drying of the pillars, and strong bearing capacity. Difficulties are insurmountable in some environments. The labor intensity of workers is high and the construction period is long, which seriously affects the normal process of mine mining.

[0005] In the prior art of public reports, there is still no inquiry about the production method of the reinforced concrete pillar of the mine roadway. It is urgent to design a new reinforced concrete pillar and make it to meet the wide application in the mine high stress soft rock roadway support. The demand for high-strength reinforced concrete pillars

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