Hydraulic automatic plugging and fracturing integrated device for coal mine roof and operation method

• Main Authors: LI YINGMING, XU LILI, GUO ZEZHENG, ZENG DEGUO, HE DEYIN, FU MENGXIONG, LIU HONGTAO, ZHANG YING, ZHU YONGJIAN, FU JIANHUA, LIU SHAOWEI, LI XUZE, XI XIAOLONG
• Format: Patent
• Language: Chinese; English
• Published: 02.06.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; MINING OR QUARRYING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention relates to a coal mine roof hydraulic automatic plugging and fracturing integrated device and an operation method.The coal mine roof hydraulic automatic plugging and fracturing integrated device comprises a drilling system, an injection system, a high-pressure water injection mechanical system, a pressure control hole sealing system and an end connecting system; the injection system, the high-pressure water injection mechanical system and the pressure control hole sealing system which are connected to the same hollow pipe achieve high-pressure water injection while plugging is conducted, and when the water pressure in the device exceeds the comprehensive acting force of the high-pressure water injection mechanical system, high-pressure water flow is injected out from an annular high-pressure water outlet hole of the injection system; the high-pressure water flow forms a 360-degree annular high-pressure section for the surrounding coal and rock mass, water in the advanced hydraulic fracturing dri