榆神矿区沙梁煤矿构造发育规律与控煤样式研究

Structural development law and coal-controlled patterns of Shaliang Coal Mine in Yushen mining area

  • 摘要: 沙梁煤矿地处华北板块鄂尔多斯地块陕北斜坡东北缘,东与晋西褶曲带紧邻,北以正谊关-偏关断裂与伊盟隆起相接。为研究煤矿的构造发育规律与控煤样式,分析了矿井断层及其组合特征,矿井由2个小型构造单元组成,F2断层以南的单斜陆块和F2断层以北的断陷带。断陷带夹于F2断层(南界)与F1断层(北界)之间,走向NW-SE,内部由94条规模相差悬殊、走向多样、相向倾斜的走向正断层和斜向正-平移断层系组成。断层依据其落差大小分为超大型、大型、中型和小型四级,其中超大型断层7条,仅占断层总数的7.45%。大型断层16条,占17.02%;中型断层22条,占23.40%;小型断层49条,占53.13%。矿井断层的走向以NW向最为发育,占断层总数的41.49%;NWW向和SN向断层次之,各占断层总数的14.89%,其他方向的断层较为分散。从倾向上看,除NWW向外,区内断层倾向几乎涵盖其他各个方向,比较分散,但以SW和NE倾向者为主,倾向W、SSW和NNE者次之,其他方向者较少。综上所述,本研究深入剖析了沙梁煤矿煤层赋存状态与地质构造之间的内在联系,为相似地质环境下煤矿的勘探与开采策略制定提供了宝贵的科学依据和实践指导。

     

    Abstract: Shaliang Coal Mine is located in the north-eastern edge of the north Shaanxi slope of the Ordos Massif of the North China Plate, adjacent to the Jinxi Fold Belt in the east, and connected with the Yimeng Rise by the Zhengyiguan-Yiguan Fault in the north.In order to study the tectonic development law and coal-controlled patterns of the mine, this paper focuses on the faults of the mine and their combination characteristics.The mine consists of two small tectonic units: a monoclinic land mass south of the F2 fault and a collapse zone north of the F2 fault.The depression zone lies between the F2 fault(south boundary)and the F1 fault(north boundary),with a northwest-southeast strike.It is internally composed of 94 sizeable faults, with diverse orientations and opposing slopes.These faults are classified into four categories based on their drop heights: super-large, large, medium, and small, with 7 super-large faults accounting for only 7.45% of the total.There are 16 large faults, constituting 17.02%,22 medium faults, representing 23.40%,and 49 small faults, accounting for 53.13% of the total.The faults in the mine area are predominantly NW-striking, making up 41.49% of all faults.Faults striking NWW and SN are the next most common, each accounting for 14.89%,while faults in other directions are more scattered.From an inclined perspective, with the exception of NWW-striking faults, the inclinations of the faults in the region cover almost all directions, although they are relatively dispersed.However, faults with SW and NE inclinations predominate, followed by those with W,SSW,and NNE inclinations, with fewer faults in other directions.

     

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