The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper studied the deep-seat coal seam in Wangfenggang mine Huainan area, and analyzed the characteristics of coal petrology and coal type distribution, then discussed the influences of regional geothermal history and tectonic subsidence history on regional coal metamorphism process. The results show that a series of bituminous coal band including gas coal, 1/3 coking coal, fat coal and lean coal...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.