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库车坳陷中秋—东秋地区位于构造挤压转换区,沿走向构造变形差异显著,中-新生界广泛发育侏罗—三叠系煤系地层,东秋段煤系厚度较中秋段薄。前人对秋里塔格煤构造深部断裂体系、构造样式与变形机制认识不足。基于最新的三维地震资料对中秋—东秋段煤构造变形样式精细解释,对比中东段煤构造差异变形特征,分析影响煤构造变形的因素。结果表明:煤层厚度控制构造变形方式,薄煤层发育多条逆冲断裂,以基底卷入变形为主,厚煤层滑脱作用强,煤层内部揉皱变形;秋里塔格构造带中东部以深部煤层作为主要滑脱层,构造挤压过程中表现为层间拆离滑脱、垂向叠置增厚、整体协调变形的构造样式。
Abstract：The Zhongqiu-Dongqiu area in the Kuqa Depression is located in the structural compression transition zone. Along the strike direction, the structural deformation varies significantly. The Mesozoic-Cenozoic strata are widely developed with the Jurassic-Triassic coal-bearing strata. The coal-bearing strata in the Dongqiu section are thinner than those in the Zhongqiu section. Yet deep fault system, structural style and deformation mechanism in the Qiulitag structural belt are poorly understood. This paper conducts a detailed interpretation of the coal structural deformation styles in the Zhongqiu-Dongqiu section based on the latest 3D seismic data, compares the differential deformation characteristics of the coal structures in the eastern section, and analyzes the factors influencing the coal structural deformation. The results show: the thickness of the coal seam controls the deformation mode of the structure, thin coal seams develop multiple thrust faults, with base-involved deformation as the main type, thick coal seams have strong sliding effect, and the internal wrinkle deformation of the coal seam occurs; in the central and eastern part of the Qiulitag structural belt, the deep coal seam serves as the main sliding layer. During the structural compression process, the structural style is characterized by layer disintegration and detachment sliding, vertical stacking and thickening, and overall coordinated deformation.
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基本信息:
DOI：10.13937/j.cnki.hbdzdxxb.2026.05.005
中图分类号:P618.11;P631.4
引用信息:
[1]牛霞霞,段站站,吕继,等.库车坳陷中秋—东秋段煤层厚度对煤构造变形的离散元数值模拟分析[J].河北地质大学学报,2026,49(05):49-57.DOI:10.13937/j.cnki.hbdzdxxb.2026.05.005.
基金信息:
河北地质大学博士科研启动基金（BQ2024012）
2026-07-06
2026-07-06
2026-07-06