共查询到20条相似文献,搜索用时 156 毫秒
1.
本文应用数值模拟方法,分析了焦家金矿采用高水固结尾砂充填后采场围岩的稳定性,计算表明,在焦家金矿采矿采用高水固结尾砂充填采场是可行的。 相似文献
2.
文中对高水固结尾砂充填体进行了较全面的实验室和现场观测研究 ,测定了充填体的各种力学参数 ,研究分析了充填体的力学特性 ,可供理论研究和现场使用。 相似文献
3.
4.
高水固结尾砂充填采矿充填体合理配比的研究 总被引:7,自引:4,他引:3
高水固结尾砂充填采矿是一种新型充填采矿法。试验测定了高水固结尾矿充填体的强度和变形特征;研究分析了影响充填体强度的主要因素、高水充填工艺的特殊要求,以及上向,下向进路开采对充填体强度和稳定性的要求,提出了满足支护强度,工艺及经济需求的充填材料的合理配比范围。 相似文献
5.
6.
在焦家金矿使用全尾砂代替分级粗尾砂进行胶结充填,可以满足矿石回采时对胶结充填体强度的要来.影响充填作强度的主要因素是灰砂比和料浆浓度.试验研究获得了胶结试块28天单轴抗压强度对灰砂比和料浆重量浓度的回归方程. 相似文献
7.
为解决夏甸金矿分级尾砂胶结充填系统分级尾砂供应不足、采场采充失调的问题,开展了全尾砂旋流器分级试验研究。根据矿山全尾砂产率、井下充填分级尾砂需求量,确定出满足充填需求的分级尾砂最低产率。设定不同的工作压力及沉砂管管径进行全尾砂旋流器分级试验,根据分级尾砂最低产率确定出旋流器工作压力及沉砂嘴管径。根据试验结果对矿山充填系统旋流器组进行了选型改造,实现了夏甸金矿采充作业的持续平衡。 相似文献
8.
9.
10.
11.
The purpose of this paper is to present an automatic method of signal analysis. To help physicians in their diagnostics, this method is implemented on a minicomputer in order to detect non-stationary points in electroencephalograms. The signal is modelled with an autoregressive filter. The parameters of this filter are adapted at each step. Identification gives the best model in the sense of a cost function representing the mean square error of noise, which is estimated during the optimisation time-window. The cost function is expressed by a quadratic formula. This allows the use of a fast algorithm, the 'conjugate gradient method'. An original statistical test is developed to detect non-stationary points in the signal. The performance of this method is tested with artificial data to determine the sensitivity of method parameters. Detection using real data is presented. 相似文献
12.
13.
河北省碾子沟金矿成矿远景评价 总被引:1,自引:0,他引:1
本文根据碾子沟金矿深部及外围找矿研究,对碾子沟金矿所包括的已有矿床和矿化区,从成矿地质背景、成矿地质条件、控矿地质因素、矿床地球化学特征等方面加以研究对比,进而对各矿区进行成矿远景评价,为矿山寻找新的矿段,解决了矿山的资源危机。 相似文献
14.
新疆西天山地区是我国重要的矿产资源基地,金矿及有色金属矿矿产资源丰富,该区分布众多的金矿点,同时分布特点具有成带性,寻找金矿潜力巨大。文中详细分析探讨西天山地区金矿成矿条件,通过研究发现,库姆托尔金矿与穆龙套金矿等均和西天山地区处在同一条构造带上,在大地构造环境上非常的类似,同时在构造演化以及赋金建造条件上非常相同。该区金矿主要受控于那拉提构造带南缘的弧形构造带以及对那拉提构造带进行横贯的横向断裂。该区广泛的发育赋金层炭质岩系以及蚀变体,利于活化金元素,促进其富集成矿。该区存在的大量的金矿化及异常,更进一步证明金矿体的存在。据此,笔者预测出4处找矿有利地段。 相似文献
15.
活性碳吸附法在我国湿法分析金上的应用 总被引:1,自引:0,他引:1
本文叙述了我国应用活性碳吸附分离金的研究成果以及该法与多种测试手段联用测定多种含金物料中金的特点,对进一步研究活性碳吸附分离法及其在黄金分析上的应用进行了探讨。 相似文献
16.
CB Millstein 《Canadian Metallurgical Quarterly》1998,46(2):79-83
The finding by Straub et al. (1995) on 6p22-24 is one of the strongest reports so far in psychiatric genetics. It appears to be substantially replicated by Schwab and collaborators (1995; 1997), and to a lesser extent by Moises et al. (1995). Still, this data does not fulfill the criteria of Lander and Kruglyak (1995) for a confirmed finding in complex disease. There are a number of data sets that do not appear to show linkage. Further genotyping work needs to be done in this area and additional markers in the area would be helpful in the available data sets. It should be noted that the Straub and Kendler dataset (Straub et al., 1995, 1997; Kendler et al., 1996), with 754 affecteds, is substantially larger than any other, and should be weighted concomitant with this. Still, additional data will be necessary before the finding may be firmly accepted. Candidate gene studies have started in this area. The SCA locus is promising on theoretical grounds, but has been only weakly positive in two studies so far. The HLA locus is interesting in relation to autoimmune theories of schizophrenia. There is a long history of HLA studies in schizophrenia with mixed results. HLA is located centromeric to the major positive region identified by Straub, but perhaps not too far to be considered a candidate region. Family-based association studies will be necessary to clarify whether there is a true association in this area. The location identified by Cao et al. (1997) on 6q is promising. Straub and Kendler's data set has been partially tested in this region with negative results. Gejman and co-workers (1997) have recently reported additional positive data in this region from Levinson and Mowry. Additional studies in this area are indicated. 相似文献
17.
18.
多目标灰色决策在爆破参数优化中的应用 总被引:2,自引:0,他引:2
本文介绍了多目标灰色决策的数学模型,该模型可广泛地用于工程爆破中的破方案比较,以及爆破试验中的最优爆破参数的决策,在本文最后,通过一个实例说明了这种方法科学,简单而又实用。 相似文献
19.