지하채굴공동에서 굴착방법에 따른 발파진동의 특성에 관한 연구

Abstract

The domestic limestone mine has been changed from open mining to underground excavation due to environmental pollution. Levels became a large size to maintain mass-production like open mining. Accordingly, levels, the scale of pillars and excavation methods generated many problems as well as most mining levels and the design of pillar size are experimentally decided. It is difficult situations that the pillars decided without grasping the specific of rock mass guarantee pillar stability in case excavations are carried out experimental methods. On this study, when blasting to excavate the same time A level and B level, the same time left transport and inclined shaft (EM-Ⅰ), sequentially A level and B level (EM-Ⅱ), separatively A level and B level (EM-Ⅲ), each vibrations measure and blasting vibration formula calculate. Nomogram analysis and damage zone of rock mass are carried into effect by formula. When blasting to excavate separatively A level and B level (EM-Ⅲ), levels and pillars analyzed the most stable blasting vibration characteristics.