Coal seam gas pressure multipoint-accurate measuring device and working method thereof

• Main Authors: SUN YUNING, DING LIPEI, SUN ZHIDONG, SONG WEIBIN, WANG ZHIMING, ZHANG SHUO
• Format: Patent
• Language: Chinese; English
• Published: 05.11.2021
• 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 relates to a coal seam gas pressure multipoint-accurate measuring device. The coal seam gas pressure multipoint-accurate measuring device comprises N groups of hole sealing units, a grouting unit and a pressure measuring regulation and control unit, wherein N is larger than or equal to 2, a pressure measuring hole is drilled in a coal seam, the N groups of hole sealing units are arranged in the pressure measuring hole at intervals in the direction from the hole bottom to the hole opening of the pressure measuring hole and are sequentially connected end to end, after grouting, the N groups of hole sealing units seal the pressure measuring hole and divide the interior of the pressure measuring hole into N pressure measuring gas chambers, the grouting unit is connected with the N groups of hole sealing units, and the pressure measuring regulation and control unit is connected with the N pressure measuring gas chambers. According to the coal seam gas pressure multipoint-accurate measuring device, th