Equivalent experimental study on rock breaking of SC-CO2 and industrial emulsion explosive

How to quantitatively calculate the rock breaking efficiency of SC-CO2 (supercritical carbon dioxide) is the focus of attention in the engineering application and economic comparison of non-explosive rock breaking technology. Through the equivalent equivalent calculation of industrial emulsion explosive, the typical representative granite and mudstone sites are selected, and the field test scheme of equivalent comparison of rock breaking effect between SC-CO2 and industrial explosive is designed. Based on the equivalent field test of rock breaking, the characteristics and parameters of rock breaking area such as rock breaking volume, rock breaking area shape, bulk rate and unit consumption of SC-CO2 and industrial explosives in the test 收稿日期:2024-04-29 基金项目: 国家自然科学基金（41972286、42072309、42102329）精细爆破国家重点实验室开放基金(PBSKL2023A1) process are compared and analyzed, and the equivalent conversion formula correction based on rock breaking volume is realized. The results show that when the volume of SC-CO2 rock breaking is large, the long and short axes of the rock breaking range are longer, and the unit consumption of carbon dioxide is 6 ~ 10 times that of explosives. The bulk rate of SC-CO2 rock breaking technology is high, while the explosive stress wave is evenly distributed and the bulk rate is small. The surface vibration velocity of SC-CO2 rock breaking is much smaller than that of industrial explosive rock breaking. The combined vibration velocity of industrial explosive blasting measuring point is 9 ~ 11 times that of SC-CO2 rock breaking measuring point. SC-CO2 rock breaking has little effect on the surrounding environment vibration. The peak value of the combined stress of the SC-CO2 rock breaking point is higher than that of the industrial explosive rock breaking. The combined stress of each measuring point in the SC-CO2 rock breaking test is 1.2 ~ 1.6 times that of the corresponding measuring point in the explosive rock breaking test.