Mine goaf closing method

• Main Authors: MA XINPING, YU BIN, XUE LONGSHAN, HE YANGXING, ZHANG GUANGFU, HU JINYUAN, HAN SHUBIAO, WANG LIBING
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2012
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The invention provides a mine goaf closing method to enhance a seal plugging effect of a stope face. The method includes: applying fireproof sealing to a face closure site, building two seal walls 1m in thickness on the closure site, reserving a space 1m wide between the two seal walls, filling coal ash into the space, and sequentially setting a coal ash pipe, a grout pipe, an observation pipe and a water return pipe on the walls from top to bottom. The face closure site comprises three system roadway seals, three seals at the front of an airbridge, three seals at the head of a belt and two seals at an air return bypass, which are located at a goaf face peripheral system and at the front and the rear of the airbridge. Using the method effectively enhances bearing capacity of the seals, prevents the fractured or cracked seals from forming leak passages, greatly reduces occurrence of internal fires of the goaf, prevents harmful gases in the goaf from leaking, and guarantees safety production of a mine.