Importance

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Abstract

Provided are an expansion pipe for blasting and a blasting method therefor. The expansion pipe comprises a main pipe (1) of which the head and tail ends are provided with a first plug (3) and a second plug (4) and a branch pipe (2) which is fixed to the interior of the main pipe (1) by means of the first plug (3), wherein a gasification agent and an electric starter (7) mounted on the first plug (3) are provided inside the branch pipe (2), the other end of the branch pipe (2) is provided with a sealing plug (5), a connecting pipe (6) is further provided at the head of the main pipe (1), one end of the connecting pipe (6) is connected to a gas source or a water source and the other end penetrates through the first plug (3) to be in communication with the inner cavity of the main pipe (1). When the expansion pipe is used, a group of the expansion pipes are connected in a head-to-tail manner via fixing pieces (8), then a hole is punched at a blasting point, the connected and fixed expansion pipe group is placed into the hole, the opening of the hole is sealed with cement, and finally the electric starter (7) is started through a remote controller outside a dangerous range, and the gasification agent is ignited by the electric starter (7), causing water gasification or air expansion inside the main pipe (1), such that the expansion pipes are blasted.

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First Claim