摘要
基于矿井大中型构造采勘对比变化较大,尽管矿井在采区衔接前进行了井上下补充勘探,但采区设计仍受中型以上断层的影响。根据西山煤田各矿构造纲要图,结合构造运动发展,分析煤田内外大中型断层构造与褶皱构造的产状要素、分布与组合特征,利用构造形迹与水平最大主控应力场的内在对应关系,绘制出对本煤田影响最直接的水平主应力线的展布趋势。结果表明,对西山煤田主控应力场总体为近东西向、南北端局部为近南北向结合的状况,西山煤田逆断层分布不多,其与本区域主要压应力方向垂直;在北东向断层占主导的情况下仍可能有少量北西向的断层共轭出现。
Big difference usually exists between the geologic exploration and onsite mining for structure and fault in mine,although the mine has conducted supplementary exploration on surface and in underground which has some negative effect in mining design,especially for medium-sized and above fault.According to the structural outline map of each mine in Xishan coal field,combined with the development of tectonic movement,analyze the occurrence elements,distribution and combination characteristics of large and medium-sized fault structures and fold structures inside and outside the coal field,and use the internal corresponding relationship between tectonic traces and the maximum horizontal main control stress field to draw the distribution trend of the horizontal principal stress line that has the most direct impact on the coal field.The results show that the main control stress field in Xishan coalfield is generally east-west,and in the NS part is near north-south.There are not many reverse faults in Xishan coalfield,which are perpendicular to the main compressive stress direction in this area,in the north-east-trending fault under the predominant situation,there may still be a small number of NW-trending fault conjugates.
出处
《山西焦煤科技》
CAS
2021年第3期16-20,共5页
Shanxi Coking Coal Science & Technology
关键词
西山煤田
主控应力场
构造影响
煤层气影响
Xishan Coalfield
Main control stress field
Structural influence
Coalbed methane influence
