| 摘要 |
PROBLEM TO BE SOLVED: To provide a slope face spray method for simply controlling appropriate flowing performance of mortar spray materials or planting spray materials carried for a long distance and for quickly and delicately responding to the change. SOLUTION: Spray materials having optimal slump value for the pumping are mixed, force-fed by a pump 24, and joined with straightly advancing compressed air in a compressed air confluence pipe 28 from diagonally backward direction. Then, the materials carried to a spray nozzle 32 through a spray hose 30 of the length 15-30 m and mixed with a specific accelerator or an aggregating agent by a spray nozzle so as to have the optimum slump value and sprayed to the slope face.
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