共查询到20条相似文献,搜索用时 218 毫秒
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根据瓮福磷矿穿岩矿段采空区的分布情况,采用FLAC3D软件建立三维地质力学模型,分析地下采空区对露天矿边坡稳定性的影响规律,提出露天矿开采的合理边坡角。 相似文献
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探讨了以矿岩量加权平均运距最小为目标的优化露天矿台阶高度的方法,导出了矿岩量加权平均运距与露天矿有关参数之间关系的解析模型,分析了矿岩量加权平均运距随这些参数变化的规律,着重指出了矿岩倾斜运输功对水平运输功的当量系数对最佳台阶高度有显著影响,就矿岩运输而言,运输功当量系数是决定是否增大台阶高度的首要因素。 相似文献
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基于3DMine的露天矿开采境界的优化 总被引:1,自引:0,他引:1
在建立矿山地质数据库、实体模型及块体模型的基础上,运用3DMine矿业软件对露天开采境界进行优化;并讨论了不同矿石价格及不同边坡角对露天境界的影响,同时分析了不同条件下剥采比的变化情况;在此基础上对露天开采进行初步设计,为矿山开采提供了技术方案及决策依据。 相似文献
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深凹露天矿高台阶开采的运输经济合理性浅析李仲学(北京科技大学)文献[1]针对有关深凹露天矿高台阶开采运输合理性研究的相互对立的结果[2]、[3],给出了一个描述矿岩量加权平均当量运距与台阶高度之间关系的数学模型,分析了台阶高度、当量系数和最终采深对卡... 相似文献
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龙滩坝矿段矿体的直接顶底板大多为铝土页岩和黏土岩,顶板稳固性较差,有必要对开采过程中的采场稳定性进行模拟分析。采用3D-σ数值模拟软件建立三维模型,设计了直接顶板下不同采场跨度、切顶后不同采场跨度、留点柱等采场结构形式,对各种采场结构下矿岩的应力、位移、塑性区和安全率的分布进行了分析,结果表明:因矿体直接顶板稳定性较差,采场跨度对顶板稳定性的影响较大,应将采场跨度控制在6 m左右,才能保证开采过程中的顶板稳定;通过对切顶方案的模拟分析,认为将稳定性较差的直接顶板切除后,在间接顶板下采场跨度能达到15 m左右;根据模拟结果并结合现场实际情况,采场应预留3 m×3 m的点柱,点柱间矿块的跨度宜控制在6 m,以保证采场直接顶板的稳定。 相似文献
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Nabil Magbool Jan Biao Huang Aris Espejo Luke Zelmer Fangwei Xu Lee Gulbransen 《加拿大化工杂志》2020,98(10):2125-2136
For the mining based oilsands industry, it is desirable to determine the quality of the ore delivered to the extraction processes in real-time to make optimal operational decisions such as optimal ore blending to achieve maximal bitumen recovery. Currently, the industry determines the real-time ore characteristics for any given shovel Global Positioning System (GPS) location by first determining the shovel elevation from the topological mine map and then using the determined geological coordinates in the 3D geological block model. It should be noted that the block model is built based on the widely spaced core hole samples, and it is updated only on a yearly basis due to high cost of narrower core hole sampling. Thus, the block model predictions are often inaccurate in between the core hole spacing. On the other hand, mining operations data are available that contain accurate ore characteristics information in the already mined area. Therefore, in this work, we present a just-in-time based data-driven modelling strategy that utilizes the recently available mining operations data to obtain reliable ore characteristics given the GPS data. The prediction capability of ore characteristics using the proposed modelling strategy is validated at core hole locations. Further, the prediction of ore characteristics at non-core hole points demonstrate promising results. 相似文献
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Purified terephthalic acid (PTA) is an important chemical raw material. P-xylene (PX) is transformed to terephthalic acid (TA) through oxidation process and TA is refined to produce PTA. The PX oxidation reaction is a complex process involving three-phase reaction of gas, liquid and solid. To monitor the process and to im-prove the product quality, as wel as to visualize the fault type clearly, a fault diagnosis method based on self-organizing map (SOM) and high dimensional feature extraction method, local tangent space alignment (LTSA), is proposed. In this method, LTSA can reduce the dimension and keep the topology information simultaneously, and SOM distinguishes various states on the output map. Monitoring results of PX oxidation reaction process in-dicate that the LTSA–SOM can wel detect and visualize the fault type. 相似文献
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本文从区域成矿地质背景、矿床特征等方面介绍了撇子沟银矿成矿地质特征,并对控矿因素进行分析,认为该矿床属构造蚀变岩型银矿,矿石具有不同的矿化组合特征,应属于同一成矿机制作用的产物。 相似文献
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Dong Soo Nam Yong Jin Choe Yeo Hong Yoon En Sup Yoon 《Korean Journal of Chemical Engineering》1993,10(1):28-35
The Symptom Tree Model (STM) has been studied extensively as a model for fault diagnosis in chemical processes and has been
applied to real processes. In this study, a program to build a model, AUSST (Automatic Synthesis of the Symptom Tree model),
which generates the STM automatically is developed. The input information supplied to AUSST includes the process topology
and the unit model library. The unit model library is represented in the form of mini-fault trees which can be constructed
systematically through qualitative abstraction from the mathematical model or the operation data and experienced operators.
AUSST has worked well, the generated symptom trees describe the paths of fault propagation sufficiently and contain all the
possible primal faults. AUSST helps to assure the accuracy of the STM as well as managing the STM consistently. It is expected
that AUSST reduces the engineering efforts required to develop a fault diagnostic system for a new process. 相似文献