A kind of reinforced concrete artificial mine pillar construction method

Abstract

The invention discloses a method for constructing a reinforced concrete artificial ore pillar. The height of the goaf is precisely divided into equal parts, the unit bodies are prefabricated according to the equal heights, and the prefabricated unit bodies are assembled in a top-down manner, and the gob is assembled with the gob height. The prefabricated unit body connected to the roof is fixed by the anchor cable member, the next prefabricated unit body adjacent to the top-connected prefabricated unit body is detachably connected to the lower end of the anchor cable member through the connecting rod member, and the subsequent prefabricated unit body is sequentially connected with the previous prefabricated unit body. The unit bodies are connected by connecting rod members, and the last prefabricated unit body is embedded between the prefabricated unit body above it and the bottom plate of the goaf. The prefabricated unit body is firmly connected to the bottom of the roof by using the anchor cable and the connecting rod, and the roof plate is forced to sink to a certain extent by the action of gravity and tension to compress the installation gap between the prefabricated unit bodies, so that the artificial ore pillars are completely connected as a whole. It is of great significance to improve the stability of the goaf, convert the primary ore pillar to the artificial ore pillar to reduce the loss of resources, and ensure the safe mining of the mine.

Description

technical field [0001] The invention belongs to the field of mining, in particular to a method for constructing a reinforced concrete artificial ore pillar. Background technique [0002] The goaf is the space formed by the mining of the underground ore body, and it is a major source of danger for the safe mining of mines. For the treatment of the goaf, the roof is the most critical. Man-made pillars support the roof, and by applying external force to balance the force of the roof, improve the stress environment of the roof, and greatly improve the stability of the roof, which is one of the effective methods to deal with the goaf. [0003] In the process of engineering practice, artificial ore pillars are made of cement, sand and other materials with good compressive properties, and the support effect depends on whether the ore pillars are connected to the top. Only when it is fully connected to the top can the artificial pillars play a supporting role. Otherwise, the suppo...

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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