Supporting device for coal seam gas extraction drilling

The utility model discloses a support device for coal seam gas extraction drilling, which comprises a support main body and an elastic support leg mechanism, the elastic support leg mechanism comprises at least two support legs hinged on the support main body, the support main body is provided with a containing groove for containing the support legs, and the support main body is provided with an elastic support leg. Each supporting leg is provided with an elastic piece used for controlling the supporting leg to pop out of the containing groove to support the drill hole and a non-return assembly used for preventing the supporting leg from retracting into the containing groove after the supporting leg pops out of the containing groove. The drill hole can be effectively supported, and hole collapse is prevented. The supporting device is suitable for being used in coal seam gas extraction drilling and used for supporting the drilling. 本实用新型公开了一种煤层瓦斯抽采钻孔用支护装置，其中的煤层瓦斯抽采钻孔用支护装置，包括支架主体及弹性支脚机构，弹性支脚机构包括至少两个铰接于支架主体上的支脚，