Method for electrochemical reinforcement of down dip weak interlayer of strip mine slope

Abstract

The invention discloses a method for electrochemical reinforcement of a down dip weak interlayer of a strip mine slope. The method comprises the steps that anodes and cathodes are alternately arrangedin the weak interlayer at intervals; all the anodes and cathodes are correspondingly and sequentially connected in series through wires and then connected with a direct current power supply, and theouter end parts of the anodes communicate with a solution bin containing an electrolyte solution through a solution delivery pipe; and the electrolyte solution in the solution bin is delivered into ananode metal pipe through the solution delivery pipe, and overflows into the weak interlayer from drilled holes in the surfaces of the anodes, and after the anodes are powered by the direct current power supply, the anodes and the electrolyte solution can react chemically to form metal compounds and hydrated cations. The metal compounds play a role in cementing and solidifying soil of the weak interlayer, the potential difference between the anodes and the cathodes drives the water inside the weak interlayer to move to the cathodes and enter into a cathode metal pipe through the drilled holes,the water flows by gravity to flow out freely from the lower end of the cathode metal pipe and be discharged to the outside of the weak interlayer, and the reinforcement effect of the weak interlayeris good.

Description

technical field [0001] The invention relates to a method for strengthening weak interlayers, in particular to a method for electrochemically strengthening downhill weak interlayers of slopes in open-pit mines. Background technique [0002] When strengthening clay rock and rock formations containing a large amount of clay minerals, the conventional reinforcement effect is often affected due to its high viscosity, poor permeability, and low strength. Conventional reinforcement methods for slopes, such as anchor cable reinforcement, are suitable for the toppling failure of rock formations with large dip angles, but the reinforcement effect for slopes with gently inclined interlayers is relatively poor. Moreover, the slope reinforcement project needs to consume a lot of manpower, material resources and financial resources; for open-pit mines, investing a large economic cost to reinforce the slope is very unfavorable to the overall economic benefits of the mine. On the other han...

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Problems solved by technology

[0002] When strengthening clay rock and rock formations containing a large amount of clay minerals, the conventional reinforcement effect is often affected due to its high viscosity, poor permeability, and low strength.

Conventional slope reinforcement methods such as anchor cable reinforcement are suitable for the toppling failure of rock formations with large dip angles, and the reinforcement effect for slopes with gently inclined interlayers is relatively poor

Moreover, the slope reinforcement project requires a lot of manpower, material and financial resources; for open-pit mines, investing a large economic cost to reinforce the slope is very unfavorable to the overall economic benefits of the mine

On the other hand, since the open-pit mine slope is not a permanent slope, with the continuous development of mining projects, there are significant periodic characteristics in the slope structure and service life. The protection period that traditional slope reinforcement measures can play It is relatively short, which makes it difficult to fully exert the effect of the reinforcement project, which is a waste from the perspective of engineering reinforcement

Therefore, for open-pit mine slopes, the current slope protection measures are mainly to change the slope structure and stability by adjusting the mining engineering plan. This method is based on the loss of a large amount of resources or the sacrifice of greater economic benefits. costly

At present, grouting reinforcement is the most suitable method for strengthening the specified range of downhill slopes in open-pit mines. However, this method is suitable for rock formations with good rock mass strength but well-developed cracks, and it is difficult to achieve effective reinforcement for weak rock formations with poor permeability.

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