某矿采矿方法选择及采场结构参数优化研究

发布时间：2019-04-24 08:42

【摘要】：天马山硫金矿有着几十年的开采历史,资源日渐枯竭,由于历史遗留原因,-215m中段以上有约100万m3空区未充填,严重影响着矿区的生产安全。为在-255m中段实现安全、高效生产,充分回收资源,先进行现场实地勘察和相关的理论研究,再运用价值工程理论、数值模拟、AHP-TOPSIS法和现场监测等方法对-255m中段的采矿方法和采场结构参数进行系统分析和深入研究,取得的研究成果如下:(1)经过查询相关资料和现场勘察后,了解矿山的工程地质条件和开采现状,确定矿体分布范围和开采技术条件,为后续采矿方法选择提供科学依据。(2)根据矿山地质勘探资料和开采技术条件,初步选出上向水平分层充填采矿法、上向水平进路充填采矿法及分段空场嗣后充填采矿法等3种适合的采矿方案,运用价值工程理论通过专家对采矿方法评判赋值,选取7个影响采矿方法优劣性的因素作为评判指标,计算各方案的价值系数依次为33.0%、30.0%和45.0%,选出价值系数最高的分段空场嗣后充填法为采矿方法,并所选方案进行初步设计,计算出主要技术经济指标。(3)运用ANSYSA和FLAC_3D联合建立完整的矿体模型并进行数值模拟计算,从应力变化、位移变化、塑性区分布3个方面对12种不同规格的结构参数进行采场稳定性分析,选出稳定性较好的4种方案,再运用层次分析法和逼近理想解排序法从经济、安全、技术等3各方面选取7个指标建立AHP-TOPSIS评判模型进行综合评价,得出综合优越度最高的采场结构参数。(4)根据优选的采场结构参数结合现场监测经验,在-255m中段针对矿体上下盘围岩和采场顶板设计一套完整的现场监测网路。根据监测所得的应力、位移数据进行分析,预测出应力显现的重点区域,为采场安全回采提供保障,从而验证了优选采矿方案和采场结构参数的可靠性。
[Abstract]:Tianma Shan sulfur Gold Mine has a history of mining for several decades, and its resources are drying up day by day. Due to the historical legacy, there are about 100 million m ~ 3 empty areas above the middle section of-215m, which seriously affect the production safety of the mining area. In order to realize safety, high efficiency production and full recovery of resources in the middle section of-255m, field investigation and related theoretical research are carried out first, and then value engineering theory is applied to numerical simulation. The mining method and stope structural parameters of-255m middle section are systematically analyzed and deeply studied by AHP-TOPSIS method and site monitoring method. The results are as follows: (1) after querying relevant data and on-site investigation, the research results are as follows: (1) To understand the engineering geological conditions and mining status of mines, to determine the distribution of ore bodies and mining technical conditions, to provide a scientific basis for the selection of subsequent mining methods. (2) according to the mining geological exploration data and mining technical conditions, Three suitable mining schemes, such as upward horizontal layered filling mining method, upward horizontal approach filling mining method and sublevel open-field subsequent filling mining method, are preliminarily selected. The value engineering theory is used to evaluate the mining method by experts. Seven factors affecting the advantages and disadvantages of mining methods are selected as evaluation indexes. The value coefficients of each scheme are 33. 0%, 30. 0% and 45. 0% respectively, and the sublevel open-field subsequent filling method with the highest value coefficient is selected as the mining method, and the value coefficient of each scheme is 33. 0%, 30. 0% and 45. 0% respectively. The main technical and economic indexes are calculated. (3) the complete orebody model is established by ANSYSA and FLAC_3D, and the numerical simulation is carried out, from the change of stress and displacement, the main technical and economic indexes can be calculated from the point of view of stress change and displacement change. In three aspects of plastic zone distribution, the stope stability of 12 kinds of structural parameters of different specifications is analyzed, and four schemes with good stability are selected. Then, the analytic hierarchy process (AHP) and the approximate ideal solution sorting method are used to analyze the stability of the stope from the aspects of economy and safety. Technology and other three aspects select 7 indexes to establish AHP-TOPSIS evaluation model for comprehensive evaluation, get the highest comprehensive superiority of stope structural parameters. (4) according to the optimum stope structural parameters combined with site monitoring experience, In the middle section of-255m, a complete on-site monitoring network is designed for the upper and lower plates of the orebody and the roof of the stope. According to the stress and displacement data obtained from the monitoring, the key area of stress behavior is predicted, which provides a guarantee for safe stoping in stope, and the reliability of optimizing mining scheme and stope structural parameters is verified.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD863

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