In China national standards of coal classification, there only no type division of natural coke so far.
目前中国煤炭分类国家标准中，唯独对天然焦没有明确的分类指标。
The coal classification distribution of coal bearing strata in the Up Permian Series of Guizhou has an X type feature in plan.
贵州上二叠统含煤岩系煤级分布在平面上呈现X型分布特征，即具有东、西侧变质低，中部变质高的特点，分布规律明显。
Combine top-coal classification with roof classification for the first time, which make up the inadequate of former classification program.
首次将顶煤的分类与直接顶、老顶的分类结果相结合，弥补了原有顶板分类方案不适合放顶煤采场的不足。
Macroscopic classification for bituminous coal is one of the research tasks for coal petrology.
烟煤的宏观煤岩分类是煤岩学研究的内容之一。
According to the number of practical data coming from drills and mines, the author puts forward classification of broken coal.
本文以陕西韩城矿区北区钻孔和井下大量的实际观测资料为依据，提出了破坏煤分类的方案。
Also available in classification iron, manganese ore and coal.
也可用于选别铁、锰矿石和煤。
The monitoring principle and rule of classification forecasting rock burst have been studied aiming at the rock burst in coal mining.
针对煤矿冲击矿压灾害，研究了冲击危险性的监测原理和冲击矿压危险的分级预测准则。
The problems in controlling upper size and lower size of feed into an air solid fluidized bed were discussed, and then an air classification technology of moist raw coal was introduced.
讨论了空气重介流化床分选对入料粒度上下限的控制方法和存在问题，介绍了潮湿原煤空气分级新方法。
It introduces the process of screening, classification and molding of the raw coal which is prepared to be raw material coal for gasification.
介绍了将原料煤加工成气化用原料煤的筛分、分级、成型等工序的工艺流程。
In the paper the evaluation index system of factors influencing the value of coal resources assets is set up, and fuzzy models for the classification of coal resources assets are given.
建立了煤炭资源产分类的影响因素评价指标体系，以及基于聚类的综合评判模糊分类模型，探讨了煤炭资源资产分类的模糊数学方法，并通过实例进行了检验。
Vibration classification screen is the key to ensure the quality of washing raw coal and product raw coal in the process of changing from run-of-mine coal to washing raw coal.
振动分级筛在矿井毛煤转化为入洗原煤过程中是保证入洗原煤和产品原煤质量(粒度合格)的关键设备。
So search on coal and gas outburst prediction model for classification of great practical significance.
因此研究煤与瓦斯突出区域分类预测模型具有重大现实意义。
And study the classification system application in diagnosing the caving and drawing characteristics of top-coal, choosing support and designing drawing mechanism.
同时研究本分类系统软件在综采放顶煤工作面顶煤的可放性诊断、支架选型和放煤机构设计中的应用。
In this article, classification and prediction methods of data mining was applied to predict gas concentrations which is the application of data mining coal and gas research.
本文将分类和预测等数据挖掘方法应用于瓦斯浓度的预测，是对煤矿瓦斯数据挖掘的应用和研究。
The monitoring principle and rule of classification forecasting rock burst have been studied aiming at the rock burst in coal mining.
分类预报岩爆监测原理及规则进行了研究，目的是煤炭开采的岩爆。
A measuring method of coal self combustion tendency is suitable for the qualitative analysis and classification of the self combustion tendency of coal bed in a coal mine.
一种煤自燃倾向性的测定方法，适用于煤矿煤层的自燃倾向性的定性与分类。
On the basis of studying on identification, classification, gradation of gas accident hazard, the structure of coal mine gas accident is analyzed by means of typical accident.
在研究瓦斯危险源辨识方法、分类分级方法的基础上分析煤矿瓦斯危险源系统结构，通过典型事故案例剖析煤矿瓦斯事故危险源系统结构。
This paper discusses the classification of the stages of engineering geological works at coal mines and the assignments of the works in these stages.
本文论述了煤炭矿山工程地质工作的阶段划分及各阶段工程地质工作的任务。
On the basis of the classification, the evolution and distribution of properties of pore of the high rank coal in China were discussed.
据此分类对我国高煤级煤孔隙性质的分布及演化规律进行了探讨。
Briefly expound the significance of fine coal briquetting in using coal resources, and introduce the concept, task and process classification of it.
本文对粉煤成型在充分利用煤炭资源方面的意义做了概括性的阐述，对粉煤成型的概念、任务及工艺分类等方面也做了简要的介绍。
This paper systematically summarizes the results of researching the soft rock classification, attribution and judgement of China′s coal mine drifts;
本文系统地总结了我国煤矿巷道在软岩分类、软岩属性及软岩判定等方面的研究成果；
The machine is widely used in classification Tungsten, Tin, Tantalum, Niobium, Rare Metals, Noble Metals, Iron, Manganese Ore and Coal ore, it is the main equipment of gravity concentration.
广泛应用于钨、锡、钽铌、稀有金属、贵重金属、铁、锰矿石和煤矿石的选别，是重力选矿的主要设备。
Study on the Construction and Classification of Gas Explosion Accident Prevention System in Coal Mine;
还在讨论此次瓦斯爆炸的以外事故。
Study on the Construction and Classification of Gas Explosion Accident Prevention System in Coal Mine;
还在讨论此次瓦斯爆炸的以外事故。
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