赵官井田岩浆岩侵入特征及对煤层开采的影响

井田内共有三层岩浆岩侵入到山西组和太原组煤系中。上层岩浆岩主要侵入到山西组2煤层附近,附近无可采煤层;中层岩浆岩对邻近可采的5煤层破坏较大而使其失去经济价值;下层岩浆岩使井田内原沉积厚度在2m左右的11煤可采性遭到很大破坏,同时对13煤层的煤质也有一定影响。三层岩浆岩距离煤层均较近,属直接充水含水层,在其富水区段或构造破碎带,特别是与其他含水层产生水力联系时,对煤层开采的影响较大。

The characters of magmatic rocks and the influence to the mining for coal seams in Zhaoguan shaft area

There are there layers of magmatic rocks in the coal measures of Shanxi and Taiyuan formations;the upper magmatic rock invaded into the vicinity of the 2nd coal seam where there are no workable seams;the 5th coal seam were deprived of value of exploitation because the middle magmatic rock destroyed it seriously;the workability of the 11th coal seam whose original thickness was about 2 meters was destroyed greatly because of the lower magmatic rock,and in the degree,the coal quality of the 13th coal seam was...