Grouting-drainage comprehensive treatment method for coal mine high-level separation layer water damage

Abstract

The invention discloses a grouting-drainage comprehensive treatment method for coal mine high-level separation layer water damage, and relates to the technical field of high-level separation layer water damage treatment. The grouting-drainage comprehensive treatment method comprises the following steps that firstly, first three drilling sections of a grouting-drainage hole are constructed at a designed position, and grouting is carried out before mining on the third drilling section; then a fourth drilling section is constructed for drainage, and grouting is carried out during mining and grouting is carried out after mining; and finally, when the working face advances to the next grouting-drainage hole, the current grouting-drainage hole is sealed. According to the grouting-drainage comprehensive treatment method for the coal mine high-level separation layer water damage, the innovative thought that one hole has multiple purposes is adopted, the grouting-drainage holes are formed in an aquifer, the method that the aquifer is filled with grouting to weaken the water filling strength of the aquifer to the separation layer is combined with the method that water accumulated in the separation layer is drained through the drainage hole, and the utilization rate of the drilled hole is increased; and meanwhile, a method of complementing multiple grouting processes such as grouting before, during and after mining and a drainage process during mining is adopted, so that the strength of overlying strata is enhanced while the water filling strength of the aquifer to the separation layer is weakened, and comprehensive treatment of the coal seam roof separation layer water damage is realized from multiple aspects.

Description

technical field [0001] The invention relates to the technical field of water hazard control of high-position separation layers in coal mines, in particular to a comprehensive grouting-drainage treatment method for high-position separation layer water damage in coal mines. Background technique [0002] Coal is the main component of energy in our country, and the safe production of coal mines, as one of the major subjects of natural science research in our country, should not be underestimated. In the process of mining, the problem of water damage in coal mines has been seriously restricting safe and efficient production. The problem of water inrush in coal mines not only affects mine shaft development and mining work, but also causes casualties, equipment damage, economic losses, and affects the benefits of coal mine production. [0003] With the continuous increase of coal mine production in my country, the depth and thickness of coal mines continue to increase, and the app...

AI Technical Summary

Problems solved by technology

If the layer where the separation layer is developed is too high from the coal seam roof, it will be difficult to construct the uphole hole, and the argillaceous rock in the Jurassic Anding Formation is easy to soften and disintegrate when exposed to water, resulting in unstable hole structure and easy damage. The hole is completely collapsed or even buried, and the water drainage effect is not ideal

In the process of draining the water from the separation layer through the ground straight-through diversion hole, the separation layer will be deformed due to the impact of mining, causing deformation, damage and blockage of the diversion hole. The construction of the through hole is also difficult, and the drainage efficiency is not high.

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