Method for recovering isolation pillar without reserved top protection layer under loose tailing filling body

• Main Authors: CHEN SHAOJIE, GAO SHIXIAN, FENG FAN, YAN ZHIKAI, FU LIJIE, LI JIAQI, JIANG NING, XIE ZHIWEI, LI MINGKUN, YOON DAE-WI
• Format: Patent
• Language: Chinese; English
• Published: 08.11.2022
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; MINING OR QUARRYING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS; SHAFTS; TUNNELS

The invention discloses a method for recovering an isolation ore pillar without a reserved top protecting layer under a loose tailing filling body, and relates to the technical field of mining methods. The method comprises the steps that a grouting anchor cable is arranged in a tailing filling body in a stage haulage roadway; drilling a hole in the filling body, installing a hole drilling peeping instrument, and determining the diffusion degree and range of the slurry; horizontal anchor rods are arranged on the filling bodies in the haulage roadway to form artificial roofs; the horizontal isolation jambs are recycled through an upward horizontal layered drift type filling mining method, a stope is divided into a plurality of layers for stoping in the vertical direction, and each layer is provided with a plurality of drifts; the top plate of the access road is supported by adopting an anchor rod support before stoping to the uppermost layer, and filling is performed after stoping; supporting the overlying arti