Freezing-method stoping method for large-water mine chamber

Abstract

The invention relates to a freezing-method stoping method for a large-water mine chamber, and belongs to the technical field of underground mine water prevention and control. According to the technical scheme, the method includes the steps that freezing holes are constructed in a roadway with a certain safety distance above the mine chamber; small freezing stations are built around adjacent chambers; positive freezing is started after freezing facility erection is completed; after a stable freezing wall is formed through observation, maintenance freezing is carried out; meanwhile, ore stoping is started to be carried out on the mine chamber; and after ore stoping is completed, chamber filling operation is conducted in time. The freezing-method stoping method for the large-water mine chamber has the beneficial effects that a freezing technology is introduced in the stoping process of the chamber to form the freezing wall with certain thickness, water on an upper plate of the chamber can be prevented from flowing into the chamber, the water gushing risk of chamber stoping is reduced, the water damage threat is reduced, and the purpose of safe stoping is achieved.

Description

technical field [0001] The invention relates to a method for recovering by the freezing method of a mine house in a Dashui mine, and belongs to the technical field of water prevention and control in underground mines. Background technique [0002] In the ore recovery process of large-scale underground mines, surface subsidence is generally not allowed to occur. At present, the ore recovery method of newly-built large-scale underground mines is mostly carried out by filling mining methods. Quaternary aquifers have complex hydrogeological conditions in the mining area. During the mining process, most of the mine houses will pass through geological structures such as faults and fracture zones. Because most of the fault fracture zones are relatively broken, they are easily connected to the upper aquifer, resulting in a large amount of water gushing. When the water gushing exceeds the drainage capacity of the mine drainage system, it will bring serious disasters to mine productio...

AI Technical Summary

Problems solved by technology

Combined with the comprehensive consideration of the geological conditions, the water gushing in the mine is mostly upward recharge. Due to the complex enrichment conditions of the surrounding rocks in the bedrock section and the variable development of joints and fissures, when the fissures are unevenly divided or the conduction is insufficient, It is difficult to achieve the expected effect by using ordinary drilling holes and grouting water plugging in the mining process of the mine, and the ore grade will be reduced after grouting, which will affect the later stage beneficiation indicators

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