Method of active coupling support in time and space for control of minimum deformation of surrounding rock of deep well roadway
A deep well roadway and surrounding rock technology, applied in the support field of deep well roadway, can solve the problems of roadway surrounding rock instability, uncontrollable, expansion of deformation and damage range of surrounding rock, so as to avoid repair work and restrain the evolution of deformation and damage , the effect of improving self-strength
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[0017] The space-time coupled active support method for controlling the minimum deformation of the surrounding rock in the deep well roadway in this embodiment is carried out according to the following steps:
[0018] a. Excavate the roadway according to the shape of the roadway section 1, spray concrete on the surface of the surrounding rock of the roadway section formed by excavation within 2 hours after excavation to form the initial sprayed concrete layer 2 to close the surrounding rock of the roadway section; then use the steel mesh 3 and The combined supporting body of the high-strength prestressed anchor rod 4 with a diameter of 25mm and a prestressed force of 160-220KN implements support on the surrounding rock of the roadway section, and timely controls the minimum deformation of the surrounding rock.
[0019] b. Within 24 hours, implement high-strength prestressed anchor cables 5 with a diameter of 22mm and a prestress of 320-420KN in the middle of the roof of the sur...
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