Roof burnt-rock water hazard prevention and control technology for working face of Ningtiaota Coal Mine
The water hazard of burnt rock in Jurassic coal field in northern Shaanxi seriously threatens the safety of mine production,and the prevention and control of this kind of water hazard is urgent.In order to explore the water hazard preven-tion technology of coal seam roof burnt rock in Shenfu Mining area and verify the reasonable feasibility of existing technical means,taking Ningtiaota Coal Mine as an example,the methods of ground drilling,grouting curtain and intercepting flow separation are used to prevent and control the water hazard of the burnt rock aquifer in the upper 1-2 coal seam roof of the 2-2 coal seam in the working face of S1233.According to the results of inspection hole drilling,pumping test,pressure water test,CT detection between holes and water quality testing on the working face after ground grouting,combined with the test results of water discharge before and after grouting,the analysis shows that the water hazard control technology of burnt rock on the working face of S1233 is scientific and effective,and the application effect of the treatment project is good.It can pro-vide the basis for the prevention and control of this kind of water hazard in the later mine,and also provide reference for the prevention and control of water in the mine with similar conditions in the area.
Ningtiaota Coal Mineburnt rock water hazardgrouting curtainfield testCT detectionwater quality analysis
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