Method for reducing main roadway dynamic pressure influence during end mining and optimizing mining stopping line coal pillar
The invention discloses a method for reducing the influence of main roadway dynamic pressure during end mining and optimizing a stopping line coal pillar, and belongs to the field of coal mining, and the method is technically characterized by comprising the following steps: firstly, arranging drill...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a method for reducing the influence of main roadway dynamic pressure during end mining and optimizing a stopping line coal pillar, and belongs to the field of coal mining, and the method is technically characterized by comprising the following steps: firstly, arranging drill sites at different positions of a stoping roadway near two or more adjacent working face initial design stopping lines, a directional horizontal drill hole parallel to the mining stopping line is formed in the hard roof in the opposite direction through a kilometer drilling machine in the drilling site, the starting part of the track of the drill hole is a curve, and the main body part of the track is an approximately horizontal straight line; in order to ensure that a hard roof of the whole working face can be completely cut off, drill sites are arranged in two mining roadways on the outermost sides of two or more adjacent working faces, drilling is carried out in the opposite directions, and horizontal drill hole |
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