聚乎更煤矿区三露天煤类分布的探讨

Coal Rank Distribution in No.3 Surface Minefield,Juhugeng Coalmine Area

聚乎更煤矿区三露天井田成煤期为中生代侏罗纪,煤的变质程度为中变质,主要煤类有1/3焦煤(1/3JM)、气煤(QM)、1/2中粘煤(1/2ZN),次为弱粘煤(RN)及少量的不粘煤(BN),并沿走向呈条带状分布。在井田向斜南翼,变质程度相对较高的1/3JM分布于浅部,相对较低的1/2ZN分布于深部。通过恢复原型盆地煤类分布规律,认为其变质现状是在深成变质作用下、现存构造面貌发生前已基本完成,勘查资料表明,贯穿井田中部的F2逆冲断层将原向斜构造切割成了两个倾向南西的单斜构造形态,逆冲断层将盆地深处的地(煤)层推覆到地表露头,使得浅部煤层变质程度高于其深部的煤层。

The coal-forming time of the No.3 surface minefield, Juhugeng coalmine area belongs to Jurassic Period, Mesozoic Era. Degree of coal metamorphism is medium, main coal ranks have 1/3 coking coal （1/3JM）, gas coal （QM）, 1/2 medium caking coal （1/ 2ZN）, then weakly caking coal （RN） and a small amount of non-caking coal （BN）, and appear as zonal distribution along the strike. On south limb of syncline in the minefield, relatively high metamorphosed 1/3JM distributed at shallow part, relatively low metamorphosed 1/2ZN at deep part. Through the restoration of coal rank distribution pattern to the basin prototype, it is considered that the coal rank actuality was already basically accomplished under the hypozonal metamorphism before the present structural configuration appearing. Exploration data showed that the thrust F2 penetrating the middle part of minefield has cut the original syncline into two dipping southwest monoclines, and push deep part strata and coal to the surface, thus made shallow part coal seam degree of metamorphism higher than that of deep part.