Reinforced concrete artificial pillar construction method

Abstract

The invention discloses a reinforced concrete artificial ore pillar construction method which comprises the following steps: accurately and equally dividing the height of a goaf, prefabricating unit bodies according to the equally-divided height, assembling the prefabricating unit bodies in a top-down inverted manner, and fixing the prefabricating unit bodies which are in top contact with a goaf top plate through anchor cable components. The next prefabricated unit body adjacent to the roof-contacted prefabricated unit body is detachably connected with the lower end of the anchor cable component through a connecting rod component, the subsequent prefabricated unit bodies are sequentially connected with the previous prefabricated unit body through connecting rod components, and the last prefabricated unit body is embedded between the prefabricated unit body above the last prefabricated unit body and a goaf bottom plate. The prefabricated unit bodies are firmly connected to the lower portion of the top plate through the anchor cables and the connecting rods, the top plate is forced to sink to a certain degree under the action of gravity and tension to compress installation gaps between the prefabricated unit bodies, and the artificial pillars are completely connected into a whole. The method is of great significance in improving the stability of the goaf, converting artificial pillars into original pillars to reduce resource loss and ensuring safe mining of mines.

Description

technical field [0001] The invention belongs to the field of mining, in particular to a method for constructing a reinforced concrete artificial pillar. Background technique [0002] The mined-out area is the space formed after the underground ore body is mined, and it is a major source of danger for mine safety mining. For the treatment of the gob, the roof is the most critical. Man-made pillars support the roof, and by applying external force to balance the stress on the roof and improve the stress environment of the roof, the stability of the roof can be greatly improved, which is one of the effective methods for dealing with goafs. [0003] In the process of engineering practice, the artificial pillars are poured with cement, sandstone and other materials with good compressive properties. The supporting effect depends on whether the pillars are connected to the roof or not. Only when it is completely connected to the top can the artificial pillars play a supporting rol...

AI Technical Summary

Problems solved by technology

And during the pouring process from bottom to top, the height of the ore pillar increases continuously, and the distance between the top of the ore pillar and the roof of the goaf decreases continuously. When the construction reaches the position close to the roof, the working space is extremely narrow, and the construction equipment cannot enter the top for pouring During the operation, the top of the artificial pillar is naturally difficult to have substantial contact with the roof, resulting in the top being suspended and unable to be connected to the top.

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