小断面硬岩巷道爆破参数优化设计与实践

为提高小断面硬岩巷道的掘进爆破效率、降低施工成本，在分析岩石爆破机理的基础上，得出了影响小断面硬岩巷道爆破效率的主要因素有；巷道断面面积，岩石的物理力学性质，掏槽方式，装药结构以及企业的实际装备水平等．对硬岩条件下的巷道爆破参数进行优化设计并用于工程实践，研究表明，爆破参数的优化设计对保证巷道施工的可靠性、提高爆破效率、降低施工成本以及提高企业的技术水平具有现实意义．

Optimized Design and Practice of Blasting Parameters for Hard Rock Roadway with Small Cross-Section

Hard rock roadways with small cross-sections account for a great percentage in coal mines of China,but the used rate of drilling and blasting is always very low.In order to improve the blasting rate and reduce the cost of the project,based on the rock blasting mechanism,some main factors such as the area of the workings,the physical mechanic property of rocks,the hole cutting mode,the loaded constitution,and the equipment level of coal mines were studied.According to the mechanical parameters of rocks around the roadway and the equipment level of these coal mines,the blasting parameters were optimized and used in practice,obtaining a good effect.The research results show that optimizing the blasting parameters is of practical significance for insuring the feasibility of the project,increasing the use rate of blast holes,reducing the cost of the project,and improving the technological level of the coal mine.