一、书斜式正断层过去,正断层经常被认为是引张作用造成的,因此人们一见到正断层往往就不加思索地作为张性破裂面来看待。但是随着地质力学工作的深入开展,发现了大量事实,特别是在煤田及煤矿矿井中所见到的大量事实,说明正断层的力学性质是各式各样的,它们可以是张性或张扭性的,也可以是压性或扭性,或压扭性的,后者在自然界中数量並不 First, the book oblique normal fault In the past, the normal fault is often thought to be caused by the role of lead, so people often see the normal fault as a non-critical as the rupture of the surface to be treated. However, with the deepening of geomechanical work, a large number of facts have been discovered. In particular, the large number of facts seen in coalfields and mines indicate that the mechanical properties of normal faults are heterogeneous. They can be either tensile or zhang Torsional, but also compressive or torsional, or crushable, the latter in nature, the number is not