Mixed filling method and filling device for goaf capable of selectively retaining roadway

• Main Authors: HUA HUAITIAN, JIA KAIJUN, ZHANG YANYAN, WANG XUHONG, ZHAO JIANGUO, LI PENGJU
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2022
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The invention discloses a goaf mixed filling method and device for selecting a reserved roadway, and the method comprises the steps: setting the direction and length of the reserved roadway by evaluating the use degree of a goaf and a working face and combining the direction needing to be mined and tunneled; and determining a combination mode of filling with the filling bag and open type filling. During filling, the mixed slurry is firstly input into the filling bag, the filling bag is gradually filled to be saturated, after the mixed slurry is solidified, the goaf is separated from a roadway, then the mixed slurry is poured into the goaf, and open type filling is conducted. The liquid level of the mixed slurry is gradually increased in the goaf until the top plate of the goaf is submerged, and after the slurry is solidified into a solidified body, open type filling of the goaf is completed. According to the method, on the basis of an existing goaf and a working face, the entry retaining mode and the entry re