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- mainly coal seam 主采煤层
- It was discovered that the gallium is more than marginal grade in content and enriched in lower coal seam and floor, and occurs mainly in diaspore. 发现样品中镓的加权平均含量超过边界品位,并在煤层下部和底板岩石中显著富集,其主要地质载体为硬水铝石。
- In the mineable C3 coal seam at Dazhuba coalfield,macroscopic type mainly consist of semi-bright fine coal,secondarily semi-dull and semi-bright lump coal. 大竹坝井田全区可采煤层C3,宏观煤岩类型主要为半亮型粉煤,其次为半暗型、半亮型块煤。煤种为中灰中高硫特低磷高热值贫煤。
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- The Gaussian curvature of No.3 coal seam in Qinshui basin is calculated. 计算了沁水盆地3号煤层的高斯曲率。
- The comprehensive research showed that coalbed methane accumulation is mainly controlled by coal seam thickness,coal petrological composition,coal rank,adsorbability and good preservation conditions. 综合研究表明:该区煤层气富集的控制因素主要为煤层厚度、煤岩组分、煤级、吸附性能和良好的保存条件。
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- Factors affected coal seam permeability change and its law is analyzed. 分析了煤层透气性变化的影响因素及变化规律。
- The outburst-proneness of 6# coal seam are studied with five indexes. 采用5种指标对该矿6%23煤层冲击倾向性进行了实验研究。
- Other industrial products are mainly coal, zirconia, powder metallurgy, corundum and so on. 其它工业产品主要有煤炭、氧化锆、粉末冶金、刚玉等。
- Wenshui County is rich in minerals, mainly coal, iron, limestone, potash feldspar and so on. 文水县矿藏丰富,主要有煤、铁、石灰石、钾长石等。
- Coal seams intermixed with iron ore . 煤层和铁矿混杂在一起。
- Industrial production of coal, ceramics, machinery, fertilizer, cement, brick, lime, knitting, leather processing. Among them, mainly coal. 工业生产有采煤、陶瓷、机械、化肥、水泥、制砖、石灰、针织、皮革加工等。其中以采煤为主。
- The way and principle of Gaussian curvature method for forecasting natural fracture zones in coal seam are discussed. 摘要论述了高斯曲率法预测煤层天然裂隙发育区的基本原理和方法。
- Nonmetals are mainly coal, limestone, marble, inkstone, serpentine, phosphorous rock, black talcum, bentonite clay and so on. 非金属矿主要有煤、石灰石、大理石、砚石、蛇纹石、磷矿石、黑滑石、膨润土等。
- Outburst prevention technique of excavating in coal seam will be directly concerned colliery safety production and excavates taking over. 摘要突出煤层煤巷掘进防突直接关系到煤矿的安全生产和采掘接替。
- Long- wall double working- face combined winning technical practice in faull lager small section coal seam. 断层带小块段煤层走向长壁双工作面联合开采技术实践。
- Research on coal bedding structure is the theory foundation and precondition of coal seam gas exploitation. 煤体层理结构的研究是煤层气开发开采的理论基础和前提条件。
- So it is feasible used the logging data to forecast coal seam gas content,and the applied value is enhance further. 证明用测井资料预测煤层瓦斯含量是可行的,从而进一步加强了测井资料的实际应用价值。
- The authors used the Analytic Hierarchy Process(AHP) in the researches of coal seam floor water-irruption. 将系统工程中的层次分析法引入煤层底板突水的研究中。