This standard stipulates the collection method of dust physical property test samples, and specifies the effective density of dust (pycnometer method), dust bulk density (natural accumulation method), dust dispersion (Anderson pipette method), dust repose angle (injection method) limited bottom surface method), dust hygroscopicity (moisture absorption rate method), dust moisture content (dry method), dust wettability (soaking speed method), dust cohesion (vertical pull method), dust specific resistance (disc method) , working condition dust specific resistance (filtered concentric ring method) and other test methods. This standard is suitable for testing the physical properties of industrial or production dust. This standard is applicable to the collection of dust physical test samples, and is applicable to dust effective density, dust bulk density, dust dispersion, dust repose angle, dust hygroscopicity, dust moisture content, dust wettability, dust cohesiveness, dust ratio Determination of resistance and specific resistance of working dust.