1) fractures in coal
煤中裂隙
1.
According to the literature,the technique,mechansim and the foundation(fractures in coal)will be discussed.
本文将对裸眼洞穴法完井的工艺、机理及其先决条件———煤中裂隙进行综述，为该技术在我国煤层气开发中的应用和推广提供参考。
2) fissures of coal
煤体裂隙
1.
The main geological factors which influenced top coal caving and broken characteristic contain:the strength of coal,the mining depth of coal seams,the features of coal seams with middle band,the thickness of coal seam,the fissures of coal,the roof features of coal-bed,etc.
影响顶煤垮落和破碎特性的主要地质因素有煤体强度、煤层采深、夹矸层特征、煤层厚度、煤体裂隙、煤层顶板特征等。
3) issured coall
裂隙煤体
4) Crack of top coal
顶煤裂隙
5) type of coal fissure
煤裂隙型
6) coal seam fracture
煤层裂隙
1.
Study on seismic waveform classification technique for detection of coal seam fracture
煤层裂隙探测的地震波形分类技术研究
补充资料：标准煤(见煤当量)
标准煤(见煤当量)
standard coal
、~‘~1人、4《1工兀飞coal)见煤当等
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