坚硬岩体上堆石料硐室爆破开采技术研究

Rockfill Materials Mining Technology by Chamber Blasting on Hard Rockmass

分析了在堆石料硐室爆玻开采中影响玻碎效果的因素，从炸药单耗、药包布置、空腔比、最小抵抗线与药包埋深等方面提出了控制石料块度和级配的对策。两次开采实残证明，石料级配符合水工设计要求，超径石得到了有效控制。

The influential factors of crushing effect in mining rockfill materials by chamber blasting are analyzed, and the control strategies of the big size rocks and the graduation are put forward from analyzing the specific charge , charge layout, coupling ratio ,burden and W/H value. The practical results prove that the stone graduation meets the requirements of hydropower project, and the big size rocks are controlled effectively.