复杂矿岩露天分层爆破技术优化研究

Optimization of stratified blasting technology for complex ore in open-pit mines

以云南磷化集团有限公司尖山磷矿为背景,对复杂矿岩露天分层爆破技术进行了优化研究。分析研究现场采集测试的爆破振动对尖山磷矿周边村庄建(构)筑物的影响,并根据现场工程地质条件的多样性,对矿山现有爆破技术相关参数进行优化,确保爆破地震波小于国家规定的爆破振动安全允许标准,不会对民房结构造成损伤。建立尖山磷矿矿山开采爆破振动地质力学数值模型;建立以岩体声速降低率为基准量的岩体爆破累积损伤扩展模型,研究边坡的累积爆破振动损伤效应,为后续矿山开采爆破提供参考,以确保边坡安全。

With Jianshan Phosphate Mine of Yunnan Phosphate Group Co. Ltd as the project background , this paper researched the optimization of stratified blasting technology for complex ore in open-pit mines. It analyzed the effect blasting vibration in the site tests had on buildings in the villages around Jianshan Phosphate Mine and optimized the existing blasting technology-related param- eters according to the diversity of the geological conditions to en- sure the blasting seismic wave by vibration lower than the one in national allowable safety standard for blasting vibration , not cau- sing the damage to the houses. The blasting vibration geomechani- cal mathematical model for Jianshan Phosphate Mine was estab- lished. The extended model of rock mass blasting cumulative dam- age with reference quantity of reduction rate of velocity of sound for rock mass was built to study the damage effect of cumulative blast vibration for side slope, providing a reference for the subse- quent mining operation to ensure the safety of side slope.