Reports on Mining from North University of China Provide New Insights (Experimental Study of Crack Propagation and Failure Around a Horseshoe Tunnel During Nearby Blasting)

摘要

2021 APR 16 (NewsRx) - By a News Reporter-Staff News Editor at Mining & Minerals Daily Daily - Investigators discuss new findings in Mining. According to news reporting out of Taiyuan, People's Republic of China, by NewsRx editors, research stated, "To investigate the effects of nearby blasting on a horseshoe tunnel and to analyze dynamic response and crack growth with different loading directions, five laboratory experiments were performed using granite specimens of a rectangle plate containing a blast hole and horseshoe tunnel structure. HS photography and digital image correlation (DIC) methods were used to visualize the highly transient process of crack propagation in the sur-rounding rocks when the sidewall, spandrel, vault, corner, and bottom floor were selected as the front blasting faces."