高陡山坡上露天台阶松动控制爆破落石安全的研究

发布时间：2018-03-30 15:10

本文选题：爆破飞散物　切入点：爆破漏斗　出处：《昆明理工大学》2015年硕士论文

【摘要】：本文以云南省会泽县马路磷矿露天矿生产爆破为背景,磷矿东南侧为一陡坡,坡度约45°,坡底有一村庄,居住着部分农户,与爆区高差约为500m。由于矿山所处地理环境复杂,在生产爆破中,需严格的控制爆破飞散物的形成及飞散。文章从基础的爆破漏斗理论出发,研究了爆破飞散物的产生、运动和防护过程,为矿山今后的安全生产提供了理论参考。首先,根据马路磷矿的地质条件和地理环境因素,制定了经济、合理的爆破方案。以爆破漏斗理论为基础,分析爆破漏斗抛掷速度的分布规律。并运用数值积分方法,研究露天松动爆破中柱状药包作用下飞散物抛掷速度的推算方法和分布规律。其次,运用数值模拟手段,使用ANSYS/AUTODYN有限元分析软件,建立1：1台阶模型,使用光滑粒子流体动力法(SPH)计算,岩石采用RHT本构,模拟台阶松动爆破,得到在矿山现行的爆破参数下,飞散物抛掷速度和岩石内部的破坏情况。最后,以数值模拟中得到的爆破飞散物抛掷初速度为基础,研究爆破飞散物在边坡上的运动规律,推算出爆破飞散物形成的落石与被动防护网接触作用时的相对速度,并通过数值模拟手段研究落石与防护网相互作用的全过程,以验证被动防护网的安全性。
[Abstract]:The background of this paper is the blasting of the opencast mine in Houze County, Yunnan Province. The southeast side of the mine is a steep slope with a slope of about 45 掳. There is a village at the bottom of the slope, and some farmers live in it, and the difference from the height of the blasting area is about 500 m.The mine is located in a complex geographical environment. It is necessary to strictly control the formation and dispersion of blasting particles in production blasting. Based on the basic theory of blasting funnel, this paper studies the production, movement and protection process of blasting particles. This paper provides a theoretical reference for the safe production of mines in the future. Firstly, according to the geological conditions and geographical environmental factors of the road phosphate mine, an economical and reasonable blasting scheme is formulated. The blasting funnel theory is the basis of the blasting funnel theory. This paper analyzes the distribution law of blasting funnel throwing velocity, and studies the calculating method and distribution law of the throwing velocity of airborne particles under the action of cylindrical charge in open-pit loosening blasting by using numerical integral method. Secondly, the numerical simulation method is used. Using ANSYS/AUTODYN finite element analysis software, the 1:1 step model is established, and the smooth particle hydrodynamic method is used to calculate the rock. The rock is modeled by RHT constitutive structure, and the blasting parameters are obtained under the existing blasting parameters. Finally, based on the initial velocity obtained from numerical simulation, the motion law of blasting particles on the slope is studied. The relative velocity of the contact between the falling stone and the passive protective net formed by blasting flying particles was calculated and the whole process of the interaction between the falling stone and the protective net was studied by numerical simulation in order to verify the safety of the passive protective net.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD235.41;TD871

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