Shallow cutting well groove broaching method for underground high-segmentation chamber of metal mine

• Main Authors: LI HUA, YUAN YUAN, WANG PENG, SHI HAORAN, HUANG HAIHUI, ZHAO DI, LI XIAODONG, XIANG WEIHUA, TIAN XIN, GAO YUQIAN, ZHANG HAIPENG, LIU FENG, DU YINGNAN, CUI JIANCHAO, REN QINGWEI, ZENG LI, LIAO ZHIQIANG, ZHAI LIPENG, SUN HAIYANG
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2024
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; MINING OR QUARRYING

The invention discloses a shallow cutting well groove broaching method for a metal mine underground high-sublevel chamber. The method comprises the following steps that (1) fan-shaped deep blast holes are formed in the positions of cutting grooves of the high-sublevel chamber; (2) arranging a shallow cutting well below the highest position of a triangular area below the fan-shaped area of the deep blast hole; (3) vertical blast holes are formed between the shallow cutting well and the lowest position of the fan-shaped deep blast holes, the heights of the vertical blast holes are sequentially reduced according to the heights of side holes of the fan-shaped deep blast holes, and protective layers are reserved among the shallow cutting well, the vertical blast holes and the deep blast holes; 4) blasting the shallow cutting well during blasting and groove broaching, and blasting the shallow cutting well to form a free surface; the vertical blast hole is blasted, and a compensation space with a triangular section