1) coal-bearing strata
The major coal-bearing strata in Guizhou, South China, is composed of the late Permian Longtan and Changxing formations whose sedimentary environments and structural setting had been found out in previous researches.
On the basis of mass borehole data, the paper analyzed Middle Jurassic coal-bearing strata distributing features, coal-bearing property,coal-forming period in the Yining basin.
2) Coal bearing strata
Based on the study and testing analysis on the texture characteristics of rock mass,the genesis of a kind of cone rock—root textite—developed in the coal bearing strata is discussed.
According to results of analysis on some cases from coal fields in the eastern China and simulation by deformation expeiments under high temperature and confining pressure,it is indicated that in coal bearing strata quartz C fabric is often of sparse small circle pattern and its axis is of obvious stress directing significance.
Sedimentary character of Permian coal bearing strata in Huaibei Zhahe coal mine area have emplatically been studied,by means of advanced experimental method in rock mineral identification,spectral analysis,x ray analysis,sedimentary phosphate analysis,etc.
3) coal measures
A sequence stratigraphic analysis of the Jurassic coal measures in Yuqia region of Northern Qaidam basin;
Karst collapse columns, sandstone aquifers in coal measures and transmissible faults are usually hydrogeologic problems in North China type coal measures.
4) coal-hearing formation
5) coal-bearing basin
Analysis of structural and sedimentary filling evolution of buya coal-bearing basin in Xinjiang
A series of late Jurassic-early Cretaceous coal-bearing basins have developed in southern Songliao Basin and distributed regularly.
6) coal bearing basin
Recently,the new discoveries of the Early Cretaceous marine dinoflagellates and early angiosperms from Jixi coal bearing basin in the eastern Heilongjiang,China have documented that the coal bearing Jixi Group,consisting(ascendingly)of the Didao Formation,Chengzihe Formation and Muling Formation, aged in Early Cretaceous.