Du Rongjun, Xia Yucheng, Sun Xueyang, Miao Lintian, Guo Chen
College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, 710054, China.
Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an, 710054, China.
Sci Rep. 2025 May 12;15(1):16402. doi: 10.1038/s41598-025-01510-4.
In this paper, the relative complexity of the tectonics in the Sangshuping coal mine was studied. On the basis of the assumption of equal blocks, using entropy function analysis and stepwise regression analysis, an empirical formula for quantitatively evaluating structural relative complexity was established from the structural characteristics in the exposed area, and then the formula was applied to the prediction of relative tectonic complexity in the unexposed area. The results are as follows. First, the main factors affecting the structural relative complexity of the No. 3 coal seam were the number of contour lines, the thickness of the overlying sandstone, the abnormality index of the coal seam thickness, and the lithology of the coal seam roof. Second, the complexity level in the exposed area of the No. 3 coal seam was mainly medium, and the level in the unexposed area was simple. The tectonics in the southern part of the coal mine were more complex than those in the north, and those in the east were more complex than those in the west. Finally, the relative complexity level of the No. 11 coal seam was simple; the tectonics of the northern part were relatively simple, and those of the central and southern parts were moderate.
本文研究了桑树坪煤矿构造的相对复杂性。在等块体假设的基础上，采用熵函数分析和逐步回归分析方法，根据暴露区的构造特征建立了构造相对复杂性定量评价的经验公式，并将该公式应用于未暴露区构造相对复杂性的预测。结果如下：一是影响3号煤层构造相对复杂性的主要因素有等高线数量、上覆砂岩厚度、煤层厚度异常指数和煤层顶板岩性；二是3号煤层暴露区的复杂性水平主要为中等，未暴露区为简单，煤矿南部的构造比北部复杂，东部比西部复杂；三是11号煤层的相对复杂性水平为简单，北部构造相对简单，中部和南部为中等。
