急倾斜厚大矿体矿房阶段爆破技术

针对司家营南区大规模落矿的安全性问题,提出阶段凿岩侧向爆破方案.该方案包括利用上向扇形炮孔爆破形成堑沟,下向垂直深孔爆破侧向崩矿,具有工程量小、机械化程度高、管理简单等优点.利用FLAC3D研究阶段爆破技术,对塑性区、监测点振速和应力场的动态模拟计算验证了大规模爆破起爆顺序的合理性和减震性,以及爆破对围岩或充填体的非破坏性.同时,研究VCR法开掘切割天井技术,采取中心与交错正菱形布设炮孔,孔间分5段起爆,保证了阶段爆破自由空间的形成.

Stage Blasting Technology of Large and Thick Steeply Inclined Orebody

Aiming at the safety problem of Sijiaying southern district large-scale mining district， a lateral drilling blasting scheme including formed trench by the fan hole and lateral caving by the vertical deep hole was proposed， which has characteristics of a small amount of engineering， high degree of mechanization and simple management， etc. In addition， the rationality and shock absorption of large scale blasting initiation order and the non-destructive effect of blasting on rock and filling body were verified through dynamic simulation on the plastic zone， monitoring vibration velocity and stress field by FLAC^3D. Meanwhile， the construction technology of cutting patio using VCR method， adopting center and cross diamond pattern for designing the hole， and using 5 sections of initiation among holes were studied to ensure the formation of blasting free space.