The invention relates to a single-action double-
pipe coring overburden drill tool for an air down-the-hole hammer. The single-action double-
pipe coring overburden drill tool comprises a central
coring drill tool and an
overburden drill tool. The central coring drill tool is a single-action double-
pipe coring drill tool and comprises a single-action vibration reduction mechanism, an inner pipe adjusting mechanism and a coring mechanism with a bayonet device; the single-action vibration reduction mechanism comprises an
impact connector, a disc spring, a bearing block, a connecting shaft, a thrust
ball bearing and a radial
ball bearing; the inner pipe adjusting mechanism comprises a connecting shaft, a core pipe connector, an inner pipe and a nut; the coring mechanism with the bayonet device comprises an outer pipe, an inner pipe, a connecting shaft, a core pipe connector, a coring
drill bit, a rolling needle, a pawl spring seat and a pawl spring; the overburden drill tool comprises a casing, a casing connector, a casing shoe, a clamp ring and a casing
drill bit. The single-action double-pipe coring overburden drill tool for the air down-the-hole hammer is applicable to relevant fields such as geological
mineral exploration and
engineering geological survey for
complex formation with loose sand, cobbles, gravel, fracture, breakage and the like.