Method for gas resourceextractionof reversed F-shaped ground well in mining area
A mining area and ground technology, applied in gas discharge, mining equipment, earth-moving drilling, etc., can solve problems such as gas overrun, and achieve the effect of ensuring gas safety
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[0034] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0035] By arranging a surface well on the roof above the coal seam, the well leads two horizontal well sections (the first horizontal well section and the second horizontal well section) from different layers of the vertical well section, and the first horizontal well section is arranged in the coal seam caving zone In the middle part, the gas decompressed and desorbed in the space of the coal mining face is extracted, and the gas desorbed in the coal mining face is continuously extracted as the working face advances. The anti-extrusion or shearing capacity of the gas drainage screen, the gas in the coal mining face and adjacent layers is extracted, and the surface well is pushed through the surface well as the working face is pushed. The second horizontal well section will drain the gas resources in the goaf for a long time. Such as figur...
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