袁店二矿106采区构造特征及演化规律

Structural Characteristics and Evolution Law of 106 Mining Area in Yuandian No.2 Mine

【目的】不良地质构造是引发煤矿生产安全事故的重要原因,对煤田地质构造特征及演化规律展开研究是减少此类事故发生的基础性工作。【方法】以淮北煤田袁店二矿106采区为例,通过分析现有资料,研究采区内部构造发育特征及其演化规律。【结果】结果表明:106采区内部褶皱构造发育较弱,仅有少量NNE向褶皱;断层较为发育,并且仅有两条逆断层,多数断层走向都介于NW-NE向之间,倾角为50°~70°,大型断层落差与延展长度相关性较好。采区内部受多期构造运动影响,不同时期形成的断层相互切割、叠加,给生产工作增加了一定难度。【结论】研究成果为后续开展地应力控制构造机理的研究打下了一定基础。

[Purposes]Geological structure is an important cause of coal mine production safety acci-dents.The study of geological structure characteristics and evolution law of coal field is the basic work to reduce the occurrence of such accidents.[Methods]Taking 106 mining area of Yuandian No.2 Mine in Huaibei Coalfield as an example,through analyzing the existing data,the development characteristics and evolution law of the internal structure of the mining area are studied.[Findings]The results show that the number of fold structures in 106 mining area is small,with only a few NNE-trending folds.The number of faults is large,among them are two reverse faults.Most of the faults are be-tween NW—NE trending,and the dip angle is 50°~70°.The large fault drop has a good correlation with the extension length.Under the influence of multi-stage tectonic movement,the faults formed in differ-ent periods cut and superimposed each other,which caused a certain difficulty in production.[Conclu-sions]The research results of this paper lay a foundation for the subsequent research on the tectonic mechanism of earth stress control.