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coal bed melting limit 煤层古冲刷界线
It is a new way of the utilization of coal bed gas. 为井下抽放煤层气的利用提出了一条新的途径。
Coal Bed Methane Drilling and Completion Technology in Western Basin of U.S. 美国西部盆地煤层气钻井和完井技术。
Preliminary research on structural law of coal bed beneath nappe in No. 对新集二矿推覆体下煤层构造规律进行了初步研究。
Graphite deposit of Heye was formed by metamorphism of the Permian coal bed. 荷叶石墨矿是由二叠系煤层变质而成的石墨矿床,石墨与煤呈同层异矿关系。
For measuring exactly on gas content of coal bed,required high core recov ery and short time to hoisting and loa ding. 为了准确测定煤层含气量,要求取心作业必须有高的收获率和尽可能短的提钻及出筒装罐时间。
The existing mine gas in coal bed occurs mostly in the free state,the adsorption state and the dissolved state. 瓦斯气体在煤储层中的赋存状态主要有游离态、吸附态和溶解态。
Several coal beds are developed in backswamp deposits. 河漫沼泽上发育多套煤层。
The hydro-geological parameters of Triassic age coal bed 3 of Dongtan Coal Mine be calculated with it. 利用相关方程求出了全东滩矿3煤砂岩顶板含水层的水文地质参数。
Roadway heading is the forerunner for clearly knowing coal bed geological conditions. 掘进巷道是全面、准确了解矿井煤层地质条件的先导。
The coal bed methane (CBD) utilization level is low due to the lack of technology, fund and market demand. 由于技术、资金和市场的欠缺使得中国煤矿瓦斯利用水平还不是很高。
The mining of shallow coal bed in Shenfu Mine is seriously threatened by suffosion hazard of coal shaft. 神府矿区浅部煤层开采受到矿井溃砂的严重威胁。
Reserves of coal, coal bed methane gas, bauxite, refractory clay, potassic rock and so on rank first in China. 煤、煤层气、铝土矿、耐火粘土、铁矾土、含钾岩石等储量居全国首位；
Coal bed methane content is fairly high which threatened safety mining in some areas in Shuangyashan mining area. 双鸭山矿区局部区域煤层瓦斯含量较高,威胁到安全生产。
The development of Coal bed Methane (CBM) has made greater progresss in recent years. 摘要近年来，煤层气开发取得了较大进展。
The result shows that the cleat density in coal bed varies in different microlithotype, and the occurrence of cleat is relevant to the grouping sequence of microlithotypes. 结果表明，裂隙在不同显微煤岩类型煤体中的分布存在较大的差异，同时裂隙分布的位置与显微煤岩类型的组合序列有关。
The mining settlement is one of the main geological disaster which caused by mining coal bed in the undergound,and the land was destructed seriously. 开采沉陷是由于煤矿地下煤层的开采导致的一种主要的地质灾害类型,对土地的破坏非常严重。
The infection of deep part mining to draining of superficid part water bearing ground,thickness of coal bed and obliquity to mining are analyzed. 分析了覆盖破坏的覆岩岩性及结构对地表移动和覆岩破坏的影响,深部开采对浅部含水层疏干、煤层厚度及倾角对开采条件的影响;
Burnt rock is come into being coal bed self-ignite and bring wall rock metamorphose and has special engineering geological characteristics. 摘要烧变岩是煤层自燃引起周围围岩变质而形成的，具有特殊的工程地质性质。
Put forward a new method applying conventional ground fracturing construction pressure to get coal bed rock mechanical parameters. 摘要提出了应用常规的地面压裂施工压力资料求取煤层岩石力学参数的一种新方法。