The invention discloses a tunnel mine drawing groove area
equidistant sectoral hole arrangement blast construction method. The method comprises the steps of 1, designing a drawing, wherein blast holes are reasonably arranged according to the tunnel
lithology grade and the tunnel blast design requirement, and an
equidistant sectoral hole arrangement method is utilized to conduct CAD
software drawing; 2, erecting an instrument and conducting surveying and
lofting, wherein the drawing in the first step is utilized, a vertical line is made in the profile plane of the joint of the blast holes, a
lofting rod or a ready-made anchor rod is arranged and fixed on the vertical line, and a nylon
rope is hung and serves as a
drill lofting line; 3, conducting drilling, wherein the drawing in the first step is utilized, and a
drill reference point construction method is adopted to conduct construction; 4, conducting charge blast, wherein
powder charging, blocking, blast
network connection, alerting and blast initiating are conducted according to the designed detailed requirement for segmentation of the
powder charge volume of each blast hole, and the
powder charging structure. The tunnel mine drawing groove area
equidistant sectoral hole arrangement blast construction method is easy to learn and operate, and hole arrangement and lofting on a palm mine drawing groove area are precisely conducted.