A regional grouting treatment method for extremely thick aquifers on coal seam roof

Abstract

The invention provides a grouting treatment method for a huge thick aquifer area on the roof of a coal seam, including the following stages: the first stage: before mining, carry out sedimentary facies analysis, select floodplain strata as the target layer, if there is no floodplain separated water layer , select the highly permeable aquifer as the target layer; the second stage: probe and locate the permeable skylight for the target layer of the floodplain, and make up for it by grouting, or grouting the highly permeable aquifer to transform it into an aquifer; third Stage: Before mining, monitor the stability of the aquifer that can be used after roof reconstruction; Stage 4: After mining, grouting the slip joints generated on the roof of the coal pillar to form a water-proof curtain. The invention makes up the skylight of the water-resisting layer by grouting before mining or transforms the high-permeability aquifer into a water-resisting layer, and grouting the slip joint after mining to form a water-resisting curtain, so as to reduce the thickness of the aquifer and reduce the mine water inflow. The purpose is to improve the underground operating environment, reduce costs, and restore normal production to the discontinued coal mines.

Description

technical field [0001] The invention relates to the technical field of coal mine water hazard control, in particular to a grouting control method for a region of a coal seam roof with extremely thick aquifers. Background technique [0002] Water inrush disasters are very serious in many coal mines in Shaanxi, Inner Mongolia and Shandong in my country. Many water disasters caused by the huge aquifer on the roof have caused heavy loss of life and property. Large-scale equipment rusts quickly, shortens its lifespan, and increases production costs, making it unsustainable. [0003] At the same time, the gushing water produced by the flood also seriously deteriorates the working environment, the occupational health environment and the ground ecological environment, which seriously increases the danger of production. Coal mines built with huge sums of money cannot produce normally and are in danger of being closed. In order to control this kind of water damage, experts from natio...

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Problems solved by technology

[0002] Water inrush disasters are very serious in many coal mines in Shaanxi, Inner Mongolia and Shandong in my country. Many water disasters caused by the huge aquifer on the roof have caused heavy loss of life and property. Rapid corrosion of large equipment, shortened lifespan, sharp increase in production costs, unsustainable

[0003] At the same time, the gushing water caused by water damage also seriously deteriorates the working environment, occupational health environment and ground ecological environment, which seriously increases the danger of production.

Coal mines that cost huge sums of money cannot produce normally and are in danger of being closed

In order to control this kind of water damage, experts from national coal mine water prevention and control scientific research institutions and teaching units have adopted various treatment technologies including traditional grouting curtain technology, powder and chemical grouting materials, vertical and horizontal drilling grouting methods, etc., but all have achieved results little

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