Coal and coal bed gas continuous development method based on ground directional horizontal holes
The embodiment of the invention provides a coal and coal bed gas continuous development method based on ground directional horizontal holes. The method comprises the steps that the coal bed gas content is measured to determine a close-range protection layer, a long-range protection layer and a prote...
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| Hauptverfasser: | , , , , , , , |
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The embodiment of the invention provides a coal and coal bed gas continuous development method based on ground directional horizontal holes. The method comprises the steps that the coal bed gas content is measured to determine a close-range protection layer, a long-range protection layer and a protected layer; the arrangement layer positions of all layers of horizontal branch holes in the protected layer, surrounding rock between the protected layer and the close-range protection layer and surrounding rock between the protected layer and the long-range protection layer are determined; all layers of horizontal branch holes in the protected layer, the surrounding rock between the protected layer and the close-range protection layer and the surrounding rock between the protected layer and the long-range protection layer are drilled; and through all layers of horizontal branch holes, coal bed gas in the protected layer, the surrounding rock between the protected layer and the close-range protection layer and the |
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