Deep hole rollback type self-cleaning grouting pipeline and method

• Main Authors: ZHANG QUNTAO, WANG ZIYUE, CHEN HUIYUAN, JIANG PENGFEI, YANG JIANWEI, LI JIAFENG
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2024
• 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 provides a deep hole retreating type self-cleaning grouting pipeline and method, and relates to the technical field of coal mine grouting supporting, the deep hole retreating type self-cleaning grouting pipeline comprises an outer connector, a pipe column and a cleaning valve which are sequentially connected in the first direction, and the outer connector, the pipe column and the cleaning valve are each provided with a grouting channel and a water injection channel; the cleaning valve comprises a piston, a piston cavity, a communicating hole and an elastic piece, the piston is slidably matched in the piston cavity in the first direction and divides the piston cavity into a first cavity and a second cavity, the first cavity communicates with a water injection channel of the cleaning valve, and the communicating hole communicates with a grouting channel of the cleaning valve; the piston is provided with an unlocking position for communicating the communicating hole with the first cavity and a lock