The structural deformation is the principal geologicalfactor that affects the thickness variation of coal seam on a mine field scale.
构造作用是控制井田范围内煤层厚度变化的主要地质因素。
2
Moreover, the relative analysis of eight factors, such as natural factor, geologicalfactor, factors of man's engineering activity, are made in this paper.
利用自然因素、地质因素、人类工程活动触发因素(八个)进行了相关分析。
3
Coal bed joints are a widespread structure in coal beds. They are important objective in study of shaft structure and also a very important engineering geologicalfactor.