CAJ | 학술논문

为了提高残矿回收的爆破效率，采用岩体声波波速数据为研究指标，研究了裂隙岩体中束状孔爆破的作用效果，并与当量等效大孔的作用效果进行比较。通过数据分析发现，单孔爆破粉碎区半径大于束状孔粉碎区半径，但束状孔爆破裂隙区半径较大，裂隙更发育。为避免过粉碎和合理爆破，束状孔爆破在残矿回收中更有优势。同时，对比不同的束孔组间距发现，间距越小，束孔爆破相互作用越强。且存在一个较为合理的束孔组间距范围，使得共同作用的爆破漏斗接近标准漏斗。在此范围内进行爆破设计，可实现提高爆破效率的目的。
위료제고잔광회수적폭파효솔，채용암체성파파속수거위연구지표，연구료렬극암체중속상공폭파적작용효과，병여당량등효대공적작용효과진행비교。통과수거분석발현，단공폭파분쇄구반경대우속상공분쇄구반경，단속상공폭파렬극구반경교대，렬극경발육。위피면과분쇄화합리폭파，속상공폭파재잔광회수중경유우세。동시，대비불동적속공조간거발현，간거월소，속공폭파상호작용월강。차존재일개교위합리적속공조간거범위，사득공동작용적폭파루두접근표준루두。재차범위내진행폭파설계，가실현제고폭파효솔적목적。
In order to improve the blasting efficiency of residual ore,the effect of cluster holes blasting in frac-tured rock mass was studied by using the data of rock acoustic velocity,compared with the effect of equivalent single hole blasting. The study shows the crushed area radius of cluster holes blasting was smaller than that of equivalent single hole blasting,but the radius of radial cracks was larger. To avoid over-crushing,the cluster holes blasting was more suitable for reclaiming the residual ore. By comparing the different spacing of cluster holes,result show that the smaller the spacing was,the stronger interaction of cluster holes blasting was obtained. A suitable spacing could make cluster holes blasting crater standard and improve the blasting efficiency.