This paper utilizes self-designed time-varying boundary sound emission test system for rock stratum fracture tocomplete the sound emission orientation test upon the fracture of marble slab. A new method—image diagnosis andorientation method is proposed to locate fracture section. Sound emission signal Y Position and Events-X positiondistribution point diagram is utilized to determine the position of fracture surface; by analyzing the time-varying curve ofCounts, Energy and Hits of acoustic emission signal in the same stage, we confirm the occurrence moment of rock stratumfracture section and analyze the development mechanism of fracture section. Through study, we can conclude that locatedfracture section position is close to actual fracture position, indicating that sound emission image diagnosis technique ischaracterized by high orientation precision, small error and good orientation effect; sound emission image diagnosisorientation method has very excellent maneuverability and practicability.
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