RADIOISOTOPE MEASURING OF DUST DEPOSIT IN MINES AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC E21F5/00 G01N1/10 G01N23/00 

FIELD: mining engineering.

SUBSTANCE: invention relates to dust control of mining surfaces, industrial facilities in the coal, mining and other industries and agricultural production where explosive dust is present: coal, sulfide, flour, plastic and others. A radioisotope method for measuring dust deposits in the mines, which consists in the use of direct absorption of beta radiation by soft dust deposited on a thin substrate-collector, which is placed on the detector and the source of carbon-14 in the form of a thin tablet is placed on the L-shaped rack above the collector at a certain height from its center. In this, a measurement of the dust sludge masses shall be produced in the following sequence. A thin collector, such as a filter AFA is placed on the detector. The intensity I0 beta-particles flux is measured, passed through the filter, and then the flow rate measurement of beta particles during deposition of dust is made Ii. There is determined a dust mass in mg, deposited at 1 cm² of a surface, and k shall be determined from the comparison of the surface density σi with the value determined gravimetrically, while the measurement error is calculated. Measurementsσi continuously occur at intervals between the measurements, depending on the sludge accumulation rate, as long as the errorΔσiσ/i reaches a predetermined value. The measurement cycle shall be repeated until the weight of the quantity of dust deposited on the filter reaches a predetermined value. The result shall be represented either on a digital display or by colour signals that indicate the degree of approximation of settled dust mass to the critical value.

EFFECT: invention allows to improve the efficiency and safety of the use of radioisotope method for measuring the current mass of the dust sludge and to simplify the design of its implementing device.

3 cl, 1 dwg