PROBLEM TO BE SOLVED: To provide a repose angle measuring device and a repose angle measuring method, allowing a repose angle to be accurately measured even in the vicinity of the ground surface with a low stress. SOLUTION: A repose angle measuring device measures the repose angle of a deposit P1 of particles P accumulated in a conical shape in a liquid. The device comprises deposit forming means 1 and pulling-up means 2 which pulls the deposit forming means 1 upward. The deposit forming means 1 includes a flat plate body 8 which is embedded in a particle pile P0 composed of assembled particles P and a cylindrical body 9 with a bottom opening which is located above the flat plate body 8. The deposit forming means 1 with the flat plate body 8 embedded in the particle pile P0 in the liquid is pulled up by the pulling-up means 2, so that the deposit p1 connected to a columnar particle assembly P2 in the cylindrical body is formed between the flat plate body 8 and the cylindrical body 9. COPYRIGHT: (C)2013,JPO&INPIT
