Deep-hole drilling cross-stage ore breaking mining method for steeply inclined thin vein

• Main Authors: ZHANG JINLAI, WANG JIE, LI CHUN, WANG GUANGXIN, ZHANG SHUBIAO, LE ZHIHUA, NIE YALIN, ZHONG JIANMIN, ZHOU BAOLU, YE GUANGXIANG, HUANG CHAO, ZENG FANZHEN
• Format: Patent
• Language: Chinese; English
• Published: 14.11.2023
• Subjects: AMMUNITION; BLASTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; GALLERIES; HEATING; LARGE UNDERGROUND CHAMBERS; LIGHTING; MECHANICAL ENGINEERING; MINING; MINING OR QUARRYING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS; SHAFTS; TUNNELS; WEAPONS

A steeply inclined thin vein deep hole rock drilling cross-stage ore breaking mining method includes the steps that blast hole digging is conducted in a chamber in two stages, blast holes are dug upwards in a vein-following roadway at the bottom of the chamber till an ore receiving roadway of the previous stage, and blast holes are dug in a chamber of the next stage from the same vein-following roadway till the ore receiving roadway of the next stage; and then, when charging and blasting of the blast holes of the previous-stage chamber and the blast holes of the next-stage chamber are completed in the same vein-following roadway, cross-chamber blasting is carried out, that is, the part below the ore receiving roadway of the previous-stage chamber and the part above the ore receiving roadway of the next-stage chamber are detonated at the same time, and ore falls into the ore receiving roadway of the next stage after blasting. According to the method, operation safety is guaranteed, the production capacity of a