Deep fractured surrounding rock composite grouting reinforcement method

• Main Authors: HAO DENGYUN, WANG TAO, FU YUKAI, JIAO JIANKANG, ZHANG ZHEN, SUN ZHIYONG
• Format: Patent
• Language: Chinese; English
• Published: 01.02.2022
• 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 discloses a deep fractured surrounding rock composite grouting reinforcement method which comprises the following steps: S1, partitioning a deep fractured surrounding rock, and dividing the deep fractured surrounding rock into a completely fractured region, a fractured reduction region, a fractured compression region and a protolith-like region according to the degree of fracture; S2, based on the zoning result of the deep broken surrounding rock, performing slurry permeability characteristic zoning on each broken surrounding rock zone to obtain a slurry high-permeability zone, a slurry medium-permeability zone and a slurry low-permeability zone; S3, performing a grouting test on the construction site, and determining the grouting pressure and the drilling row pitch of each permeability characteristic subarea; S4, selecting a corresponding grouting material for each grout permeability characteristic subareasaccording to the fracture development degree; and S5, conducting drilling and grouting op