Open stope subsequent filling mining method for wedge-shaped top pillar segmented rock drilling stage of thick and large ore body

• Main Authors: ZHOU LI, ZENG LINGYI, WAN XIAOHENG, OU RENZE, ZHAN JIN, WEI WEI, JIANG KE, LIN WEIXING
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2021
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; MINING OR QUARRYING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The invention discloses an open stope subsequent filling mining method for a wedge-shaped top pillar segmented rock drilling stage of a thick and large ore body. Stopes are arranged in the direction perpendicular to the ore body, the first-step stope and the second-step stope are arranged at intervals, the first-step stope is mined firstly, a goaf is filled, then the second-step stope is stopedand a goaf is filled; during stoping of the first-step stope, the bottoms of deep hole blast holes in a front row of the uppermost segment are lowered row by row with the position where a cutting groove is located as the vertex, and a wedge-shaped top pillar is formed on the upper portion while stoping blasting is conducted; and during stoping of the second-step stope, retreating type stoping is conducted from an upper wall to a lower wall, deep holes in the upper segment are ahead of deep holes in the lower segment by a certain row distance, stepped stoping blasting is conducted, and stoping is conducted on all the seg