本文通过对淹没射流破碎岩石的理论及实验研究，以破岩效率作为目标函数，得到射流破岩的最优压力条件。
Through the theoretical and experimental study on rock breaking by submerged water jetting, taking rock breaking efficiency as goal function, the optimum jetting pressure was acquired to break rock.
实验表明，提高了射流冲击压力的破碎岩石效率。
Experiment shows the rock breaking efficiency of jet flow impact pressure is enhanced.
岩石破碎的好坏对矿山工程在经济上和生产效率上有极为重要的影响，为提高爆破效率，需对岩石的可爆性进行分类。
In mining project, rock crushing has great effect on economics and productive efficacy. In order to improve blasting efficacy, it is necessary to classify the rock in terms of its blastability.
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