Space expansion device for soft coal seam gas extraction hole

• Main Authors: TAO MING, ZHAO RUI, XIANG GONGLIANG, JIA YUCHUN, QIU XIANPENG, XIAO ZIHENG, ZHAO HENG, WU XINGYU, CAO ZHENG, ZHAO QIZHENG
• Format: Patent
• Language: Chinese; English
• Published: 19.01.2024
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The invention discloses a soft coal seam gas extraction hole space expansion device which comprises an extraction pipe and a supporting frame, the extraction pipe is provided with a plurality of gas extraction holes, the supporting frame comprises a fixing rod, a plurality of sliding ferrules and a...