FIELD: mining. SUBSTANCE: coal samples are taken and subjected to polarization in course of their cooling from 200 to minus 196 C. Then, samples are heated from minus 196 to 200 C, and during heating electric charges of samples are measured. Values of charges serve to determine the category of outburst hazard of coals. Device has measuring cell with electrodes located in furnace. Measuring cell is connected with source of polarizing voltage. Novelty covers charge amplifier, comparator and indicator. Measuring cell through switch is connected with inputs of polarizing voltage source and charge amplifier. Outputs of charge amplifier and sources of threshold voltage are connected with input of comparator whose output is connected with indicator. EFFECT: higher efficiency. 2 cl, 2 dwg, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DETERMINING OUTBURST HAZARD OF COALS | 0 |
|
SU1606714A1 |
| ELECTROCHEMICAL CELL FOR ANALYZING CORROSION OF METALS | 1995 |
|
RU2085926C1 |
| METHOD OF MEASURING CROSS-LINKING DEGREES OF LOW AND HIGH DENSITY POLYETHYLENE (VERSIONS) AND DEVICE FOR ITS REALISATION | 2016 |
|
RU2624601C1 |
| 0 |
|
SU399768A1 | |
| METAL OR ALLOY IDENTIFICATION METHOD AND INSTRUMENT | 2012 |
|
RU2499253C1 |
| METHOD OF CHECKING POLYMER MATERIAL STRUCTURE DEFECTS | 0 |
|
SU947733A1 |
| METHOD FOR ROCK MASS STABILITY CONTROL | 1991 |
|
RU2013561C1 |
| METHOD OF DETERMINATION OF PARAMETERS OF SEMICONDUCTOR MATERIALS AND HETEROSTRUCTURES | 1991 |
|
RU2028697C1 |
| METHOD OF SELECTING DIAMONDS FOR IONIZING RADIATION DETECTORS | 0 |
|
SU991836A1 |
| METHOD FOR PRODUCING MIS TRANSISTORS | 2002 |
|
RU2206141C1 |
