松软煤层内全长筛管护孔并具有带压封孔的装置及方法

本发明提供了一种松软煤层内全长筛管护孔并具有带压封孔的装置及方法，涉及瓦斯抽采技术领域，解决了钻孔坍塌导致堵塞的问题。该装置包括注浆系统、抽采系统和固孔系统，注浆系统通过压力泵将带压密封材料注入钻孔，提高钻孔的密封效果；抽采系统的抽采管在金属挡板和固孔筛管上的通气孔中间抽采瓦斯，通气孔增强了气体的流通性；固孔系统在钻孔内定位并通过金属挡板固定，固孔筛管之间通过卡口和卡扣连接固定；将该装置安装固定在瓦斯抽采钻孔内，封孔后抽采管连接抽采泵，进行瓦斯抽采。该瓦斯抽采装置及施工方法能够防止煤质、开采深度及高应力引起的钻孔坍塌，还可以提升瓦斯抽采效率，保证瓦斯抽采过程的安全性。 A full-length screen pipe hole protection device and method with pressurized hole packing in a soft coal seam relates to the field of gas drainage technologies. The device includes a grouting system, a drainage system and a hole fixing system. The grouting system injects a pressurized sealing material into a borehole through a pressure pump to increase a sealing effect of the borehole. The drainage system drains gas in the middle of air holes on metal baffle plates and hole fixing screen pipes through a drainage pipe to increase flowability of gas. The hole fixing system is inside the borehole and fixed with the metal baffle plates, and the hole fixing screen pipes are fixedly connected with each other through fitting mouths a