Method for reconstructing top plate and bottom plate double limestone water-bearing strata through double-layer multiple branch consequent layer drilling grouting

• Main Authors: WU SHANYUAN, WANG KAI
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2017
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS; SHAFTS; TUNNELS

The invention belongs to the field of mine water prevention and control and particularly relates to a reconstruction method for a seam which is threatened by double limestone water damage of a top plate and a bottom plate. Compared with original technologies of top and bottom plate reinforced grouting, downhole reinforced grouting and ground horizontal drilling treating coal seam bottom plate thin layer limestone by using ground vertical boreholes, according to the technology of the invention, advanced type high pressure grouting is conducted on a target layer by using a petroleum drilling machine to construct double-layer multiple branch consequent layer drilling, so that a coal seam top plate and bottom plate limestone water-bearing strata is reconstructed, and safe coal seam exploitation is realized. By means of the mode, the effects that the range of covering the target layer is wide, the hole drilling engineering amount is small, top plate and bottom plate holes share the same opening section, the cost o