北掌煤田构造控煤浅析

Structural Control of Coal in Beizhang Coalmine

北掌煤田为一向东倾斜的单斜构造,单斜构造基础上发育一系列北北东向、南北向张性断裂和近东西向的褶曲构造,断裂构造为煤田主要构造形式,褶曲被断裂切割,岩浆岩的后期侵入对区域内主要可采煤层也具有较大的影响。因此,北掌煤田煤系地层原生构造简单,煤岩层较为稳定,但因后期改造强烈,含煤地层较大程度上受其控制与影响。

Beizhang coalfield is a monocline dip east,on the monocline series of NNE,NS tensional faults and near EW folds developed.Faulted structures are main structural form in the coalfield,folds cut by faults,and succeeding igneous rock intrusion had larger influence on mineable coal seams.To sum up,original structure of Beizhang coalfield was simple,coal seams and strata were rather stable,but since succeeding reform was strong,so coal-bearing strata largely controlled by the posthumous structures.