Tectonic stress is an important parameter for understanding the dynamics of underground engineering and for the exploitation of coalbed methane. Multiple-period structural features usually have complex spatial relationships in tectonic superposition areas, which provides evidence for identification of the sequence of the tectonic stress period. Conjugated joints and slickensides are used to reconstruct the tectonic stress of the No. 8 Mine in Pingdingshan. Based on the geological unit division and field measurements, data on hundreds of joints and slickensides are collected from 33 stations. The tectonic stress results indicated by the conjugated joints show that there are mainly four directions of tectonic stress: NEE-SWW, NW-SE, NE-SW, and NNE-SSW. The tectonic stress results of the slickensides indicate that there are mainly four directions of tectonic stress: NNE-SSW, NNW-SSE, NEE-SWW, and NW-SE. According to the systematic analysis of the joints and slickensides, this paper separates the superposed joint and slickenside sets and identifies the tectonic stress periods with their abutting relationships. Three tectonic stress periods are determined and the sequence of the tectonic stress periods is NE-SW, NW-SE, and NEE-SWW. The results are consistent with other tectonic stress measurements for both the region and the locality.

中文翻译：

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基于构造叠加区构造特征的构造应力重建

构造应力是了解地下工程动力学和煤层气开采的重要参数。多期构造特征在构造叠加区通常具有复杂的空间关系，这为构造应力期序列的识别提供了依据。平顶山8号矿利用共轭节理和油泥重建构造应力。根据地质单元划分和野外测量，从33个站点收集了数百个节理和滑坡数据。共轭节理的构造应力结果表明，构造应力主要有四个方向：NEE-SWW、NW-SE、NE-SW和NNE-SSW。滑坡构造应力结果表明，构造应力主要有四个方向：NNE-SSW、NNW-SSE、NEE-SWW和NW-SE。本文根据节理和滑坡的系统分析，将叠合的节理和滑坡分离，识别出构造应力期及其邻接关系。确定了三个构造应力期，构造应力期顺序为NE-SW、NW-SE和NEE-SWW。结果与该地区和当地的其他构造应力测量结果一致。确定了三个构造应力期，构造应力期顺序为NE-SW、NW-SE和NEE-SWW。结果与该地区和当地的其他构造应力测量结果一致。确定了三个构造应力期，构造应力期顺序为NE-SW、NW-SE和NEE-SWW。结果与该地区和当地的其他构造应力测量结果一致。