提高块煤率的爆破技术

New Blasting Technology Applied to Increase Proportion of Lump Coal in Coal mining

全面总结了影响炮采工作 面块煤率因素，并着 重讨论了提高块 煤率的爆破参数与 技术。实践证明，文中所研究的爆破技术能较显著地提高块煤率，能取 得较好的经济效益。

This paper summarizes the factors that affect lump coal ratio of coal faces in an all round way and discusses emphatically the blasting parameters and techniques of enhancing lump coal ratio .The practice proves that given blasting technique can prominently raise the lump coal ratio and get a good economic benefit.