科研之友
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摘要
Single-use cracking tube is a new type of carbon dioxide expansion blasting equipment, which has the characteristics of safety and control, convenient construction, etc. Through theoretical calculation and hydrostatic test, the average pressure peak value of ZWD89 series of single-use cracking tube is 53. 19 MPa, and the error is 12. 48% from the theoretical calculation value of 47. 29 MPa. The blasting energy of a single ZWD89-1500 type single-use cracking tube is equivalent to that of 264. 24 g TNT explosive by using the formula of blasting energy of compressed gas and steam vessel. The field vibration test shows that the blasting vibration velocity peak value at 5 m in two working conditions is 2. 5032 cm/s, and the peak value of blasting vibration basically shows a linear attenuation trend, which proves that the carbon dioxide expansion blasting technology is suitable for blasting engineering construction under harsh environment. The frequency spectrum analysis shows that the main frequency of carbon dioxide expansion blasting is mainly distributed within 50 Hz. With the increase of the number of blasting holes, the main frequency is gradually close to the low-frequency region, which needs to be paid attention to. ? 2022 Izdatel'stvo Meditsina.
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