摘要
根据矿山采空区矿柱的分布特征,在保证矿柱回采安全和尽量提高矿柱回采率的前提下,提出了控制爆破堆坝回收矿柱的方法,该方法通过在下盘和上盘同时立即实施深孔控制爆破堆筑松石坝支撑上盘,从而限制上盘向采空区的岩移,数值模拟分析结果表明,该方法可有效控制上盘岩石的应力和位移,其爆破堆坝可有效防止围岩冒落产生的冲击波,矿山实践共安全回收矿柱84.7万t,既回收了矿柱,又处理了空区隐患。
According to the pillar distribution characteristics of the mine goaf,the pillars were recovered by constructing dam with controlled blasting,under the premise of ensuring mining safety and maximizing the pillar recovery rate.In this method,the blasting holes were drilled immediately at the lower plate and the upper plate and a tophus dam was constructed to support the upper plate,so as to limit the rock movement of mine goaf. Numerical simulation results showed that this method could effectively control the stress and displacement on the upper plate rocks,and the blasted dam would availably prevent the air blasting wave caused by surrounding rock caving.In mining practice,besides 847000 tons of pillars were recovered,the hidden danger of goaf was controlled.
出处
《矿业研究与开发》
CAS
北大核心
2015年第8期23-26,共4页
Mining Research and Development
关键词
控制爆破堆坝法
空气冲击波
矿柱回收
空区处理
Constructing dam with controlled blasting
Air blasting wave
Pillars recovery
Goaf treatment
