(1. Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine，University of Science and Technology Beijing，Beijing 100083，China；2. Faculty of Land Resources Engineering，Kunming University of Science and Technology，Kunming，Yunnan 650093，China)
Abstract：Aiming at the problem of source locating in rock engineering，the two-dimensional acoustic emission source locating algorithm without knowing the velocity profile by T. Kundu was modified. The shape of sensor cluster was extended from isosceles right triangle to arbitrary triangle for the generalization of the sensor layout. The modified locating algorithm was verified by a series of tests on a granite plate with three typical sensor layouts (isosceles right triangle，common right triangle and equilateral triangle). The results indicate that time delay of similar waveform between the adjacent sensors can be obtained accurately by means of cross-correlation technique. The located sources are close to the actual source. For each synthetic source，the mean square deviation of six repeated tests is very small. The better points ratios of 3 typical sensor layouts are 82.6%，84.0% and 71.0% respectively，which verified the applicability and accuracy of the source locating algorithm in the discontinuous materials like rock.
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2019, Vol. 38 
