二氧化碳致裂器在岩石中深孔预裂爆破中的应用研究

二氧化碳致裂器具有施工安全、操作简单等明显的优点,由于其能量释放嘴的限制,在岩石爆破中受到一定的局限。归纳分析了当今二氧化碳致裂器释放嘴结构状况,采用大型分析软件模拟分析了释放嘴,提出了喷嘴适合边坡预裂爆破的结构形式是锥形,进口宽度为40 mm,出口宽度为20 mm,长度为18 mm,收缩角约30°释放嘴优化结构形式和合理参数,喷嘴形状应为长条矩形状,沿致裂器两侧竖向线等距排列的布置,并在实际工程中试用效果良好。

Study on Application of CO2 Fracturing Apparatus in Pre-splitting Blasting of Rock Deep Hole

Carbon dioxide fracturing has the advantages of safe construction and easy operation,and is limited in the rock blasting due to the limitation of its energy release nozzle. This paper summarizes and analyzes the current carbon dioxide fracturing device release nozzle structure,using large-scale analysis software simulation analysis of the release of mouth,put forward the structure form of nozzle suitable for slope pre-splitting blasting is tapered,import ex-port width is 40 mm,width 20 mm,length is 18 mm,the contraction angle of about 30° to release mouth structure and reasonable optimization the parameters,nozzle shape should be long rectangular shape,fracturing for vertical line a-long the sides are arranged on the layout,the practical application shows that has great application value.