2 coal mine of the Hongshan coal field according to the geological settings,drilling equipment and technique,and treatment methods used for solving problems encountered,which would be of referential significance for coal exploration and drilling.

The formation and harm of spontaneous combustion in coal field are generally described.

Transient Electromagnetic Method can be used to prospect the complex geological situation of water rich coal fields.

Comparison of coalfields and coal-mining geological conditions of the main coal-producing countries in the world;

Specialization of electromagnetic instruments for coalfield hydro-geological exploration;

Discussion on Coal Quality and Market Direction of Xingxian Coalfield;

Comparison of interpolations for coal nature of coalfield based on geological statistics;

Study on the flotation technology for deep-cleaning of coal slime;

Working principle of a hydrocyclone introduced in relation with classification of coal slime;flow pattern within cyclone analyzed regarding distribution of tangential,radial and axial velocity;and design standard for its configuration parameters given.

A coal slime test was carried out by use of diesel oil emulsified by new type of emulsifying reagent developed independently.

Study of effect of slime processed by ultrasonic on flotation reagent;

Research on micro characteristics of pyrite distributed in slime;

Understanding of the effect mechanism of Ca~(2+)on flotation and coagulation of slimes;