Full rock gangway small-section roadway blasting hole arrangement manner and blasting hole construction method

• Main Authors: CHEN ZAIBING, HU YUNJIANG, LIU DEBING, QIN LE, WANG JIAN, CHEN ZHIKUN, ZHOU FEI, XU GANG, LEI HONGBO, HUANG SONG, FAN YUANCHANG, ZHANG FENGQIN
• Format: Patent
• Language: Chinese; English
• Published: 27.03.2020
• Subjects: AMMUNITION; BLASTING; EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; HEATING; LARGE UNDERGROUND CHAMBERS; LIGHTING; MECHANICAL ENGINEERING; MINING; SHAFTS; TUNNELS; WEAPONS

The invention belongs to the technical field of mining excavation, and provides a full rock gangway small-section roadway blasting hole arrangement manner. The full rock gangway small-section roadwayblasting hole arrangement manner includes 14 crushing holes, 10 slotted holes, 15 peripheral holes, 5 bottom holes and 16 auxiliary holes. The 14 crushing holes are arranged in the lower middle portion of the roadway section, are arranged into two rows, are located on the two sides of the center line of a roadway and are staggered; the 10 slotted holes are arranged in the lower middle portion of the roadway section, are arranged into two rows, are located on the two sides of the center line of the roadway and are symmetrically arranged; the distance between the slotted holes and the center line of the roadway is greater than the distance between the crushing holes and the center line of the roadway; the 15 peripheral holes are arranged along the straight wall section and the spring line ofthe roadway section; the