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就压片法制样、用荧光品位分析仪分析铁矿样品时,样品的粒度对分析结果产生的影响作了定量研究,提出的有关分析条件用于实际样品分析中,获得了较满意的结果。 相似文献
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讨论了将快速定量装车系统技术应用于主井箕斗装载过程中的可行性与必要性。通过工艺流程的比对,分析得出主井箕斗装载过程实现较高程度自动化控制的2个关键环节为煤仓下给煤机给煤速率的调节和带式输送机输送速度的调节,并针对这2个关键环节提出了可行的处理办法。 相似文献
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介绍了切缝药包爆破技术的爆破原理,施工工艺及要求。金佳矿在+1721m水平瓦斯抽放巷施工中采用了该项技术,取得了较好的效益。 相似文献
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本文研究了防老剂甲对煤炭自燃的阻化作用,结果表明,防老剂甲对煤炭的氧化有显著的阻化作用,它与现有阻化剂相比,其作用的本质是利用化学原理中断煤炭的氧化反应链,达到阻燃的目的。 相似文献
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以龙永煤田培丰勘探区为例,主要探讨采用时间序列粒度分析曲线在地层对比中的应用,即根据岩石粒度绘出的粒度曲线进行地层对比,可以避免因地层中化石和其它岩矿特征不明确所导致的对比困难或错位,对于勘探中取得更为准确的地质资料具有重要的意义。 相似文献
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目前,城镇地籍测量采用的主要方法是常规GPS结合传统测量技术。这种方法的缺点是:在进行静态控制测量无法获得控制点的实时坐标,单基站RTK测量作业距离受到限制。本文通过一个实例证明:在进行城镇地籍测量中,采用CORS的网络RTK技术来进行城镇地籍测量各项精度指标都可以达到规范的要求,而且能够减少劳动强度,提高城镇地籍测量的工作效率,完全可以代替常规仪器来进行城镇地籍测量工作。 相似文献
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Industrial scale Horomill® and hybrid HPGR/two-compartment ball mill applications at puzzolanic portland cement production were presented with emphasis on the general operational characteristics of the circuit configurations, size reduction and energy efficiencies of the Horomill® and two-compartment ball mill grinding conditions. Horomill® circuit configuration indicated to have advantages in terms of production of high strength cement as compared to Hybrid HPGR/two-compartment ball milling, depending on the classification performance of the separators influencing the circuit performance. 相似文献
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Specific discharge rates in industrial scale multi-compartment cement grinding ball mills were determined using industrial scale data to assist modeling of multi-compartment ball mills. Multi-compartment ball mill model structures were proposed to estimate normalized specific discharge rate functions. Multi-compartment mills were divided into perfectly mixed mill segments to describe material transport mechanism in the mill. Specific discharge rate functions were determined by using the estimated mill hold-up for perfectly mixed mill segments at the steady state condition of the cement grinding circuits. Estimated normalized discharge rate functions were found to be different than the basic pattern observed in semi-autogenous mills due to the differences in design and operational conditions of the mills. Coarse particle accumulation was found to have a significant effect on discharge rate function pattern. Estimated normalized discharge rate functions could be used in modeling of multi-compartment ball mills. 相似文献
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用事故树分析法确定煤矿瓦斯突出的主导因素探讨 总被引:2,自引:0,他引:2
在综合分析影响瓦斯突出多项因素的基础上,结合煤矿瓦斯地质情况,创建了瓦斯突出事故树的一般模型;在参考青龙煤矿的瓦斯地质情况下建立了相应的矿井瓦斯突出事故树事件函数;通过最小割集的基本事件求取重要度系数,最终确定了控制瓦斯突出的主导因素。该方法的成功应用可为瓦斯地质单元的划分和瓦斯突出的区域预测提供定量化依据。 相似文献
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Behshad Jodeiri Shokri Hamidreza Ramazi Faramarz Doulati Ardejani Mohammadhossein Sadeghiamirshahidi 《Mine Water and the Environment》2014,33(2):146-156
Two models were evaluated as alternative methods for predicting pyrite oxidation in the Alborz Sharghi coal washing waste pile (in northeastern Iran). The first model applies a ‘feed-forward artificial neural network (ANN) with 4-7-1 structure’. The model uses depth, initial remaining pyrite fraction, mole fraction of oxygen, and annual precipitation as input parameters and returns the remaining pyrite fraction in the related depth of the pile as its output. In the second model, an adaptive neuro-fuzzy inference system (ANFIS), which uses generalised bell membership functions and the Takagi–Sugeno-type fuzzy inference system, was applied with the same input–output parameters. The correlation coefficient, root mean squared error, and average absolute relative error for the training stage of the ANNs were 0.81, 0.169, and 0.12, respectively, while the values for ANFIS were 0.91, 0.091, and 0.078, respectively. Comparison of the correlation coefficients and the error parameters revealed that both models successfully predicted remaining pyrite fraction from various depths of the pile. However, ANFIS was found to be more reliable and more accurate. 相似文献