1) coal core sampling
煤芯煤样
2) coal core assay
煤芯样化验
3) Coal Core
煤芯
1.
The Influence of Drilling Coal Core Sample ′s Collection and Coal Quality Determination on Rational Use of Coal Resources;
正确采取煤芯煤样 合理利用煤炭资源
2.
We can determine coal-bed gas synthetically through the three methods including lithologic characteristics、gas logging abnormity and engineering parameters to accurately judge the position of coal core during mud-logging,together with some new methods of calculating the quantity of coal-bed gas on the spot,such as gas reference method and thermovacuum distillation of drilling fluid,etc.
煤层气勘探岩芯录井至关重要,可通过利用泥浆录井过程中岩性特征、气测异常和工程参数卡准煤芯位置的3种技术方法以及利用气体参照法、钻井液热真空蒸馏法等现场计算煤层气量的新方法来综合判定煤层气。
3.
Based on an auto-simulating experiment of the CBM desorption during pick-up of coal core under drilling fluid medium,we discussed systemically the effects of CBM pressure,core-hoisting velocity,coal granularity and drilling fluid density on desorption-diffusion behavior.
准确求取钻井液条件下煤芯煤层气逸散量,是确定煤层含气量的关键。
5) coal core sample
煤心煤样
6) coal sample
煤样
1.
Explanation on revision of GB 474—2008 《Method for preparation of coal sample》
GB 474—2008《煤样的制备方法》修订说明
2.
It is found that when the vario EL Ⅲ type ultimate analysis apparatus is used to determine coal samples,some breakdowns usually appear,becuse the coal sample combusts difficulty in combustion tube and ash affects the complete combustion of coal sample.
用元素分析仪vario ELⅢ分析煤炭样品时,由于煤样在燃烧管中难燃烧,燃烧过程中产生的灰对样品的完全燃烧影响较大,导致在分析过程中仪器常出现一些故障。
3.
Aimed at the characteristic of discreteness of the coal sample, pulse-penetrating method is used to measure the acoustic wave speed and the strength test is finished on MTS815.
采用超声脉冲穿透法测量煤样波速并进行岩石力学试验,回归分析得出了煤岩试件声速与其力学参数之间的关系式,为尽可能避免因煤样离散性而带来的盲目试验提供了一条技术途径。
补充资料：煤的热导率
煤的热导率
thermal conductivity of coal
mei配redaol七煤的热导率(thermal eonduetivity of coal)热量从煤的高温部位向低温部位传递时，单位距离上温差为1℃的传热速率。是煤的性质之一。室温下煤的热导率几为0.21一0.27w/(m·K)。有的观点认为煤的热导率随煤化度提高而增加，并得出热导率与固定碳(见煤的工业分析)之间关系的经验式:久一(0 .29+7.ox一0一3)/3.6此，w/(m·K)。式中Fc为固定碳%。有的研究结果则认为，煤的这一指标还受煤的密度、粒度、水分和灰分等影响，即实际上由多种因素所决定。因为气体的热导率远低于固体，所以块煤的热导率随煤的视密度提高而呈线性增加，并高于粉煤的热导率。粉煤的粒度愈小，其热导率愈低。粉煤的热导率还随煤的散密度的增加而增大。由于水分和矿物质的热导率均高于煤，煤的热导率随水分和灰分的增高而增大。煤在开始热分解前，热导率随温度升高而增大，凡一从。〔i+氏(t一20)〕，w/(m·K)，式中入、戈。分别为‘℃和20℃时的热导率，‘。为热导率随温度变化的系数，一般为0.002一0.006，煤化度较低的煤氏值较高。煤在结焦过程中热导率的变化和测定方法与焦炭热导率相同。 (姚昭章戴中蜀)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条