The storage, application and forecast of coal seam gas in Hegang mine field are introduced, and the detailed mining area and way for earlier and later stage are provided.
The structural deformation is the principal geological factor that affects the thickness variation of coal seam on a mine field scale.
"We're walking over a mine field. At any moment you may be blown to pieces!"
The banded gneisses underlying the mine field are, as a rule, micaceous, the amount of biotite determining mainly the shades of the bands.
The gas got together, and the technician acted against the rules to weld underground in the mine field. There were more than twenty people killed in the fire damp explosion.
"to prevent soldiers from stepping on land mines placed by the Eighth Route Army, more than ten Chinese people were ordered to lead the way, i. e. to walk in the mine field in front of the troops";
