某煤田地质勘探区大比例尺测图GPS测量技术

为了满足某煤田地质勘探区大比例尺测图和工程定位的需要,讨论了在煤田地质勘探区控制测量的精度需求,根据此要求用GPS定位方法建立了控制网.测量平差和精度评定表明GPS定位技术是建立煤田地质详查区控制网的最优方法之一,同时指出了GPS测量应注意的问题,得出了有益的结论.     

利用GPS定位技术建立矿区控制网的几个问题

主要论述了利用GPS定位技术建立矿区控制网时，影响网精度的几个因素，分析了数据采集时间、网平差方法、约束点精度以及不同网形对网精度的影响，提出了保证GPS网精度的几点建议。     

河南省新密煤田某详查区平面控制测量方法

为了满足大比例尺测图和煤田地质勘探工程测量的需要,本文讨论了在煤田地质详查区建立控制点的精度要求,根据该精度要求和相关规范建立了控制网,平差和精度评定表明GPS定位是建立煤田地质详查区平面控制网的最优方法之一,同时指出了GPS测量应注意的问题,得出了有益的结论。     

GPS控制网已知点的可靠性检核

GPS网布设中,已知点可靠性直接影响GPS定位成果精度,要获得高质量GPS定位成果,除了优化网形设计,严格遵守GPS测量规范要求作业外,对GPS网中的已知点一定要进行必要的可靠性检验,以便发现和剔除含有粗差的已知点,以提高控制网的精度。据此,介绍了GPS控制网已知点可靠性检验的几种方法,主要包括：回归分析法,实测基线比较法和约束平差分析法3种。     

GPS技术在沛县城镇土地调查中的应用

结合沛县城镇土地调查项目,详细叙述了 GPS静态定位技术在该项目地籍测量控制网中的应用,通过对精度的统计和分析,说明控制网的建立是成功的,并根据精度储备情况,建议对 GPS外业观测技术指标做适当调整,从而使GPS技术发挥更大的作用.     

应用GPS定位技术重建大同矿区三等控制网

介绍了应用GPS定位技术重建大同矿区三等控制网的具体实施情况。就如何进行控制网的设计高等级约束点的检测和选定,GPS网的精度检查提出了自己的方法和建议.对全网进行了必要的精度分析并得出结论。     

矿区GPS测量控制网实践

目前已经广泛利用GPS技术进行测量控制网的建立。该文介绍了矿区GPS控制网的布设方案、作业设计和数据处理方法,分析了网的实测精度及注意事项。实际观测结果表明,矿区GPS控制网具有较高的精度。     

似大地水准面模型在张家口地区矿业权核查中的应用

矿权核查工作需要建立覆盖数千平方公里范围的GPS控制网,如何保证控制点的平面高程精度是必须解决的重要问题。为此,以张家口地区矿业权核查GPS控制网的建立为例,从构网、观测、平差计算、精度分析等方面系统介绍了大面积GPS控制网的建立步骤和方法,并得出利用似大地水准面模型内插的方法求解控制点高程,可得到较高精度的结论。     

基于椭球变换的高原矿区GPS控制网的建立方法

阐述了在高原矿区建立独立GPS控制网时如何通过几种椭球变换的方法获得GPS控制网起算点坐标的方法,并通过某矿区D级GPS控制网的建立,比较几种椭球转换方法的特点及其对GPS网二维约束平差精度的影响。     

GPS技术在建立矿区控制网的应用分析和探讨

文中主要论述了GPS技术提高控制网精度及其可靠性问题的探讨,分析影响测量精度的主要因素,以及提高GPS测量的方法与措施,探讨提供1954年北京坐标系、1980西安坐标系、地方独立坐标系建立的技术联系和转换,满足不同的定位需要。     

用于煤浮选表面活性剂的选取

为研究表面活性剂对煤浮选的促进作用 ,选取多种表面活性剂进行实验 ,优选出 6种表面活性剂。这几种表面活性剂对煤浮选有良好的促进作用 ,具有捕收能力强、选择性高、节油明显等优点 ,有较好的应用前景     

2006年我国煤矿瓦斯突出事故统计分析及防范措施

对2006年煤矿瓦斯突出事故进行统计分析,主要从突出次数和死亡人数两个角度考虑。从统计结果中发现瓦斯突出事故是呈区域性分布的,私有煤矿占有相当大的比例,达到76.9%,并且时间上也有一定的规律性。全国范围来看,突出事故的原因主要与生产管理制度不完善、企业技术基础薄弱、安全投入不足、安全管理不到位等多种因素有关,根据上述问题提出了相应的解决措施。     

Coal fires in China

Coal fires have a very long history in China; the oldest coal fires have being burning for many million years. Up to now more than 56 coal fires spots were distinguished. They mainly locate in West-North of China, North of China and East-North of China. About millions of tons of coal have been burned in fires every year. Xinjiang Autonomy is the most serious region in coal fires as it has 38 coal fires spots and about 6.85 million tons of coal was burned every year. Coal fires in China ignited by wildfires,spontaneous combustion and human being during mining activities. These fires have released about 0.9 million tons of gasses (including CO, CO2, SO2, NO2 CH4, CO2, H2S etc.) into the atmosphere every year, most of which are brought to the east by wind and resulting more heavier air pollution in northern China.     

Geological risks in slag heaps of roofing slate in Spain

Abstract

Roofing slate exploitations in Spain are concentrated within the regions of Valdeorras and La Cabrera. These progressively increased their production in the early sixties, and generated great volumes of wastes, which are now deposited in slag heaps, and owing to their effect on the drainage system currently constitute a geological risk, similar to that which happened in the floods of 1976. These risks have been evaluated both qualitatively, through a cause-effect matrix, and quantitatively following the methodology of the Master Plan of California on geological risks. Corrective solutions have been studied in order to mitigate the actual risks, and protect the affected riverbeds. Future performance measures have also been taken to minimize the wastes produced, and relocate them on suitable slag heaps, and even re-use them     

The formulation and use of mixed collectors in sulphide flotation

Mixtures of collectors have been widely used for many years in sulphide flotation, and a range of performance benefits have been reported for many different systems. The combinations of collector types have varied, as have the ratios that have been used. Synergistic effects have been obtained (greater than the sum of the parts) and in some cases the mechanisms of this improved behaviour have been identified. These benefits have been attributed to increased carrying capacity of the froth phase, faster kinetics, and more successful recovery of middling or coarse particles. It is the interaction between the various components of the mixed collector system, rather than the individual main effects, that dominate the performance benefits. The process benefits include increased paymetal recoveries and grades – as well as increased rates of recovery whilst using lower dosages of reagents. Various mechanisms have been reported and are discussed. These have been shown to affect different composition/liberation classes and sizes of mineral particles. In recent years, automated quantitative mineralogy and surface analysis technology such as ToF-SIMS have enabled the development of better information, to establish what aspect of the process has been affected. This has been successful mostly for use in a diagnostic capacity. Candidate selection for the mixed collector suite is presently based on experience and contextual knowledge. Predictive properties from these systems are a desirable future goal. Currently optimum combinations are preferably identified experimentally at laboratory scale prior to any plant trial. It is recommended that such laboratory work be performed using a factorial design with replicates and quality controls, such as may be delivered from High-Confidence Flotation Testing. The purpose of this paper is to summarise and review current theory and practice in the usage of mixtures of collectors in sulphide flotation – both in the application and in research in order to develop insights and guidelines to develop a methodology for use in a predictive capacity. A case study demonstrating this approach will be published at a later date.     

香港边坡加固技术与边坡安全系统

香港边坡是以全风化的火山岩和花岗岩为主，部分边坡表面覆盖坡积土。香港加固边坡一般采用土钉技术，且对边坡工程坡面进行绿化种植，而且做出了详细规定并有成熟技术，对边坡加固后的维修和管理也形成了一定的制度．并且建立了完善的边坡安全系统。     

室内空气中甲醛的监测

随着人民生活水平的提高，家装风气迅速普及到千家万户，可随之而来的居室空气污染也逐渐向人们发出警报。为此，对室内空气中主要污染物甲醛进行了监测分析，提出家装应注意的问题。     

有色冶炼炉渣在矿山充填中的应用研究

充填采矿由于充填成本较高而制约着其发展，寻求一种能替代水泥的胶结料用于井下充填，以降低充填成本，不少矿山企业和科研人员对此怀有兴趣，铜坑矿在应用有色冶炼炉渣代替部汾水泥作胶结材料用于井下充填的试验研究获得成功，取得了良好的技术经济效果。     

硅酸盐细菌在矿物工程领域应用研究进展

综述了硅酸盐细菌在矿物工程领域的研究现状。研究显示，在矿石除杂、浮选工艺、提取有价值金属、溶磷解钾等进行了一些研究，取得了一些进展。指出今后需 加强这方面的研究工作，发展我国矿业的生物工程。     

岩巷超前临时支护在中泰公司的应用

根据目前岩巷掘进顶板管理状况,结合该矿实际,采用钢管作超前临时支护,通过近两年来实践,能够有效控制了顶板事故,具有良好的经济效益和社会效益。