METHOD TO DETECT AERODYNAMIC FORCE OF VARIABLE-MASS BODY IN FLUID MEDIUM Russian patent published in 2011 - IPC E21F1/00 

FIELD: mining.

SUBSTANCE: according to the method, the body is installed in the input cross-section of a mine, its mass is measured, a fixed air medium is installed in the mine, the mine length is measured, as well as angle of its inclination, the body is imparted with a possibility of movement in the air medium. The specified mass flow of body movement is measured, as well as the air medium movement speed that corresponds to it, their possible limit deviations from the specified values are identified. In case there are deviations, the body length is measured, as well as its midlength section, volume and shape. Their respective values are identified in the output cross-section of the mine. The mass flow of the body and the speed of the air medium movement are varied. Mass flow rates of the body and the air medium are measured in the output cross-section of the mine, as well as the specific densities of the volume flow rate of the air medium, corresponding to the mass flow rates of the body, parametres of their variation modes are determined, as well as the specific density of the air medium, and the initial aerodynamic force of the body is specified. The aerodynamic force of the body in the air medium with the variable mass speed of the body is determined in the output cross-section of the mine, at the specific density of the volume flow of the air medium and various parametres of their variation modes using given mathematical formulas.

EFFECT: increased accuracy of aerodynamic force detection and improved validity of air flow supplied into the mine.

2 dwg