Method and system for conducting equal-thickness treatment on working face coal seam thickened zone and adjacent coal seam

Abstract

The invention relates to a method and system for conducting equal-thickness treatment on a working face coal seam thickened zone and an adjacent coal seam. A hydraulic drilling or hydraulic punching method is adopted to firstly punch the coal seam thickened zone to unload coal, and the volume of a coal body of the coal seam thickened zone after coal unloading is approximately equal to the volume of the coal body of a normal-thickness coal seam; and then a regional gas treatment method the same as the method adopted in the normal-thickness coal seam can be adopted in the coal seam thickened zone, so that the outburst risk of the coal seam thickened zone can be accurately eliminated. The method and system for conducting equal-thickness treatment on the working face coal seam thickened zone and the adjacent coal seam is suitable for coal and gas outburst, dangerous coal and gas outburst or high-gas coal seams, and in the working face preparation process and before coal roadway tunneling,regional coal and gas outburst prevention and control measures are adopted in the construction process.

Description

technical field [0001] The invention belongs to the technical field of gas control, and in particular relates to a method and a processing system for treating thickened coal seam belts and adjacent coal seams of a working face with the same thickness. Background technique [0002] Article 45 of the "Regulations on the Prevention and Control of Coal and Gas Outbursts" stipulates that regional outburst prevention measures refer to outburst prevention measures taken on a large area of ​​outburst coal seams before mining outburst coal seams. Regional outburst prevention measures include mining protective layers and pre-pumping coal seam gas. Methods for pre-extraction of coal seam gas include: surface well pre-extraction of coal seam gas, underground drilling through bed or along-bed drilling for pre-extraction of section coal seam gas, through-bed drilling for pre-extraction of coal seam gas in strips of coal roadways, and bed-by-bed drilling Drilling holes or through-bed dril...

AI Technical Summary

Problems solved by technology

[0008] Corresponding to the actual production, for a single, soft coal seam, the working face without mining protection layer conditions, due to the soft coal quality, poor stability of the roof, floor and surrounding rock, the hole wall collapses easily during drilling construction, resulting in drill sticking , buried drilling, resulting in a low porosity rate, which affects the gas drainage effect, especially in the thickened coal seam zone, where the gas pressure is high and the gas content is large, and the thickened coal seam zone cannot be found by drilling along the bedding, which has buried a major problem for the safe production of coal mines. Hidden danger

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