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。
Combine top-coal classification with roof classification for the first time, which make up the inadequate of former classification program.
烟煤的宏观煤岩分类是煤岩学研究的内容之一。
Macroscopic classification for bituminous coal is one of the research tasks for coal petrology.
煤植体分类是煤植体研究的基础。
在煤岩的分类中，有腐殖煤和腐泥煤之分。
本文定义了与煤加工相关的通用术语以及包括煤采样、分类、试验、分析和转化的名词术语。
This part defines terms commonly employed in the general vocabulary, sampling, classification, testing, analysis and conversion of coals.
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。
And study the classification system application in diagnosing the caving and drawing characteristics of top-coal, choosing support and designing drawing mechanism.
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。
According to the number of practical data coming from drills and mines, the author puts forward classification of broken coal.
本文尝试利用煤在重液中分离所得的理论指标与煤的浮选效率的比较关系来探讨煤的浮选性分类指标。
This paper attempts to explain floatability classification parameters of coals through the theoretical data of float and sink in comparison with flotation efficiency.
首先对煤矿地质条件进行分类，采用连续介质力学理论，探讨条带开采的合理条带煤柱尺寸。
The coal mine's geological conditions are classified, and the rational sizes of strip coal pillars in strip mining are discussed using the theory of continuous medium mechanics.
对复杂地质条件下的煤巷进行了分类，并对复杂地质条件下的煤巷锚网支护技术进行了研究和分析，提出了合理的有效措施。
The entries in complicated geological conditions are categorized and discribed, whose bolt and mesh support technique is analysed, some reazonable measures are put forward.
对于煤层结构复杂、变质程度较高的煤类，定性分类较为复杂。
As to the coal seams with complex texture and higher degree of metamorphism, the qualitative division of coal species is more complex.
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。
On the basis of the classification, the evolution and distribution of properties of pore of the high rank coal in China were discussed.
阐述了哈拉沟煤矿主采煤层顶板的赋存特征，以现场监测、现场调研为手段，分析了煤层开采、护巷煤柱尺寸及地下水对煤巷顶板稳定性的影响，为今后煤巷顶板稳定性分类及合理支护提供依据。
By taking the on-site monitoring and research as a tool, the influence of coal mining, coal pillar size and underwater on the roof stability of coal roadways is analyzed.
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。
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.
根据煤岩孔隙不同半径范围内累积孔隙体积分数所占的比例大小对孔隙进行了大小分类。
According to cumulative porosity percentage of pores with various radius of coal, the pores with coal were classified into three categories, namely micro-pore, mesopore and macropore.
根据煤岩孔隙不同半径范围内累积孔隙体积分数所占的比例大小对孔隙进行了大小分类。
According to cumulative porosity percentage of pores with various radius of coal, the pores with coal were classified into three categories, namely micro-pore, mesopore and macropore.
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