Abstract:

According to the geographic report of Xiaojihan Coal Mine, this mine is simple mine in hydrogeology. Water burst happen in vertical ventilation shaft at coal uncovering layer. Water flow is 89m3/h, 2.3MPa. It was proved that Xiaojihan Coal Mine coal seam No.2 is main aquifer. Coalbed water is mainly static water. After improving roadway alignment, adding temporary drainage system and drilling drainage from ground and underground, it was successfully uncovered at aquifer.

Key words:

Xiaojihan Coal Mine, coal seam, basal water, coal uncovering, water drainage, drainage system