Keywords coal bed;rock mechanics;physical property;hydraulic fracturing;isotropy;anisotropy;structural feature;fracture geometry;tensile strength;fracture;fracturing pressure;

• 煤层;岩石力学;物理性质;水力压裂;各向同性;各向异性;构造特征;裂缝几何学;抗压强度;抗拉强度;断裂;破裂压力;