METHOD OF DETERMINING DYNAMIC PRESSURE BY A BODY OF VARIABLE WEIGHT IN A CURRENT MEDIUM Russian patent published in 2019 - IPC E21F1/02 

FIELD: mining.

SUBSTANCE: invention relates to the field of mining and can be used in determining dynamic pressure by a body of variable weight in the current medium. According to the method, the body is placed into an initial section of the segment, the body weight, the midlength section, the height of the segment and the specified weight density of the body single volume are measured. Then, the body is allowed to move from the initial section to the final section of the segment, the body action time is measured, the preset speed of its movement is measured and the preset density of the body weight pulse is determined. Then, the medium resistance rate is measured relative to the body, the specified density of the volume flow rate of the medium is determined and possible deviations of the density of the body weight pulse and specific density of the medium flow from their specified values are determined. In the presence of deviations, corresponding values are established in the final section. Body weight pulse and specific density of the medium are varied from the initial value to the final value. Their values are measured in final section of mine working at each measurement. Thereafter, parameters of body pulse variation modes, specific density of medium flow are determined, initial dynamic pressure of the body is determined, and dynamic pressure is determined at each measurement. Then, its total actual value is determined and compared with allowable value. Under condition of their inconsistency, actual dynamic pressure value is changed to the required level, after that the reliable air flow rate is determined and the required technical result of the invention is obtained.

EFFECT: high accuracy of determining dynamic pressure with a body of variable weight in a current medium, and taking into account this in improving reliability of supplying air flow to the mine.

1 cl, 1 dwg