羊拉铜矿KT6矿体爆破参数优化研究

发布时间：2018-03-23 13:17

本文选题：爆破漏斗试验　切入点：爆破振动监测　出处：《昆明理工大学》2017年硕士论文

【摘要】：云南迪庆矿业开发有限责任公司是由云南铜业(集团)有限公司、迪庆藏族自治州投资成立的有限责任公司。矿区所在的德钦县地处滇西北藏区,虽区内矿产资源丰富,但经济基础极为薄弱,是国家级贫困县。因此,加快羊拉铜矿矿产资源的开发利用进度,对云南三江有色金属资源经济区的建设和促进滇西北贫困藏区的快速、持续发展均起到极为重要的先导作用。而目前羊拉铜矿主要的生产区域是位于47#线以南的KT6号矿体,科学合理的爆破参数对KT6矿体生产爆破有着重要意义。论文以《KT6矿体爆破参数与破碎岩巷支护方式优化研究》中爆破参数优化研究子课题为背景,通过对羊拉铜矿KT6矿体采场的爆破现状进行现场调查,结合其岩石力学性质,基于利文斯顿爆破漏斗理论提出爆破漏斗试验方案并进行现场试验,在通过对现场试验结果统计筛分、分析的基础上,结合KT6矿体的实际情况和中孔爆破参数反演初步得到用于模拟的五组孔底距方案。在振动传播规律和岩石动态特性研究方面,通过对振动测试数据的分析,运用萨道夫斯基回归公式得到3390中段地形、地质条件有关的系数和衰减指数K与a,.使用HHT分析法对不同水平下地震波的频谱特征进行分析;通过对现场岩石取样进行纵波波速的测试以及振动测试中岩体波速的收集,运用弹性波理论中岩体裂隙系数与波阻抗判据对羊拉铜矿矿体特性做简要描述。运用有限元软件ANSYS/LS-DYNA对初步设计的五组变孔底距方案进行数值模拟,通过对五组不同数据下不同时期的应力云图、等效应力云图以及特定单元最大有效值应力的分析和对比,得到五组方案中最优方案的孔底距参数。在工业生产试验中,与矿山工作人员共同设计3390m水平一单元第二次大爆破,并对爆破效果进行分析以验证所选参数的合理性和科学性。
[Abstract]:Yunnan Diqing Mining Development Co., Ltd. is a limited liability company invested by Yunnan Copper (Group) Co., Ltd and Diqing Tibetan Autonomous Prefecture. Deqin County, where the mining area is located, is located in the Tibetan region of Northwest Yunnan, although the area is rich in mineral resources. However, the economic base is extremely weak and is a poverty-stricken county at the national level. Therefore, it is necessary to speed up the development and utilization of the mineral resources of Yangla Copper Mine, to build the Sanjiang Nonferrous Metals Resources Economic Zone in Yunnan and to promote the rapid development of the impoverished Tibetan region in Northwest Yunnan. Sustainable development plays a very important leading role. At present, the main production area of Yangla Copper Mine is the KT6 orebody south of the 47# line. The scientific and reasonable blasting parameters are of great significance to KT6 orebody production blasting. The background of this paper is the research of blasting parameters optimization in KT6 orebody and the supporting mode of broken rock roadway. Based on Livingston's theory of blasting funnel, the blasting funnel test scheme is put forward and the field test is carried out through the field investigation on the blasting status of KT6 orebody in Yangla Copper Mine, combined with its rock mechanical properties. On the basis of statistical screening and analysis of field test results, combined with the actual situation of KT6 orebody and inversion of mid-hole blasting parameters, five groups of hole bottom spacing schemes were preliminarily obtained for simulation. In the aspects of vibration propagation law and dynamic characteristics of rock, five groups of hole bottom distance schemes were preliminarily obtained. Based on the analysis of vibration test data, the coefficients and attenuation exponents K and A of the topography, geological conditions and the attenuation index K are obtained by using the Sadolski regression formula in 3390 section. The spectral characteristics of seismic waves at different levels are analyzed by using HHT analysis method. Through the measurement of the longitudinal wave velocity of rock samples and the collection of rock mass wave velocities in vibration measurement, The rock mass fracture coefficient and wave impedance criterion in elastic wave theory are used to briefly describe the orebody characteristics of Yangla Copper Mine. Five groups of variable hole bottom distance schemes are numerically simulated by using finite element software ANSYS/LS-DYNA. Through the analysis and comparison of stress cloud map, equivalent stress cloud map and the maximum effective value stress of certain element under five groups of different data, the parameters of hole bottom distance of the optimal scheme in five groups of schemes are obtained. The second large blasting with 3390m horizontal unit was designed with mine staff, and the blasting effect was analyzed to verify the rationality and scientificalness of the selected parameters.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD235;TD862.1

【参考文献】