Firstly,the existing coal accounting overlooks the internal heat productivity of coals,which leads to fail to reflect the true costs of coals caused by coal consumption and true inventory of coals.

Discussion on coal valuation based on the dry basis gross caloric value;

The main reason for coal resources waste and countermeasures;

Investigation of density consist of coal by use of the technique of solid-liquid fluidization;

Study on Theory and Application of Circular Economy Development in Coal Industry;

After introducing current status of coal industry IT application work in our province,the author analyzes critical fields in coal information infrastructure construction,and puts forward several new development objectives and prospects, which are of vital importance for coal industry to take a new road to industrialization and implement the strategy of sustainable development in the coming years.

As great dangers lie in coal industry, we are aiming at decreasing accident rate and increasing production level in safety.

The paper studies on the principal technologies on coal desulfurization and retardant mechanism of cement retarder and active mechanism of cement mixed material.

Based on the comparison of coal desulfurization effects of several kinds of oxidants,the mixed oxidant of glacial acetic acid and hydrogen peroxide was selected as the best.

White rot fungus was applied to coal desulfurization for the first time and its feasibility and principle were studied.

Discussion on countermeasures to improve competitive force of china coal industry;

Problem analysis of coal industry scale in Heilongjiang province and countermeasures;

Multi-object optimization models of coal industry dynamic input-output;

China's coal resources tax reasonable analysis;

Analysis and research on the future of surplus coal resources in Xingtai mine;

Discussion on the sustainable development of Guizhou coal resources;