采场围岩沿结构面滑移破坏时的声发射特征

Sound Projection Characteristic in Sliding Failure of Enclosing Rock within Stope along Structure Plane

使用真三轴压力机模拟采场围岩的受力状态，研究了含天然弱面、人工弱面和完整岩石滑移破坏时的声发射特性．含弱面岩石滑移破坏过程中，在极限应力的８０％时，声发射率和能率出现前兆峰值，临近极限应力时，主破裂而附近的次生裂隙数量、尺寸、影响范围对声发射主频、能量中心频率的漂移有重要影响．

he sound projection characteristic in sliding failure of the natural weak--plane,the mantnade weak-Plane and the whole rock are studied by simulating stress state of the enclosing rock withinstop using real three-axile press. In a state of 80K limiting stress,the foreworning peak--value of thesound projection rate and energy rate will be appeared. In close to limiting stress,the quantity,size andcoverage of secondary fracture plane near by main fracture will produce the significant influence on thedrifts of main frequence of sound projection and centre frequence of energy.