Large-drift-diameter circumferential flow supply shield pressure relief sieve hole drill rod for outburst coal seam

• Main Authors: SUN YUNING, DING LIPEI, SUN ZHIDONG, WANG ZHIMING, SUN XUHUI
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2021
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a large-drift-diameter circumferential flow supply shield pressure relief sieve hole drill rod for an outburst coal seam. The large-drift-diameter circumferential flow supply shield pressure relief sieve hole drill rod comprises an inner pipe and an outer pipe, a male buckle and a female buckle are arranged at the two ends of the inner pipe respectively, an inner hole of the inner pipe is an inner deslagging channel used for deslagging, a plurality of convex ribs are circumferentially arranged between the two ends of the outer surface of the inner pipe, and sieve holes communicated with the inner deslagging channel are formed in the convex ribs; a slot which penetrates through the inner wall and the outer wall of the outer pipe and is matched with the convex rib is formed between two end parts of the outer pipe; the inner pipe and the outer pipe are coaxially matched to form a large-drift-diameter circumferential flow supply channel; according to the large-drift-diameter circumferentia