Control forming method for draw shaft soil block

The invention discloses a control forming method for a draw shaft soil block, which comprises the following steps of: firstly, determining the position of a draw shaft in a connection way, enabling the distance between the working surface of the connection way and the side wall of the draw shaft to be 0.7-1m through multiple times of blasting, and then constructing a plurality of buffer blast holes at intervals at the position which is a first distance away from a bottom plate of the connection way, a plurality of blast holes are constructed in the position, with the second distance, above the buffer blast holes at intervals, blasting is conducted in the blast holes, finally, rock soil on the upper portions of the blast holes is broken till communication between a connection channel and a draw shaft is formed in the area above the blast holes, a soil block is formed on the lower portions of the blast holes, the soil block is a primary rock soil block, and a soil block body is not damaged by blasting; the scra