To use 3D seismic prospecting in control of coal seam occurrence form has demonstrated its satisfying effects,but for a mine's high yield,high efficiency geological guaranteeing system still need to determine geological anomalous bodies of“barren zone”,subsided column,gob area and coal seam outcrop etc.

Theoretical analysis of numerical value of the spontaneous combustion fire-heating air pressure for coalfield outcrop;

during researching the development of spontaneons combustion of coal outcrop.

In order to improve the recovery rate of resources and extend the service life of mine,the Fourth Well of Meihe Coal Mine plans to use open-pit mining on the shallow outcrops of coal pillars in steep thick seam(12 seam).