http://rdf.ncbi.nlm.nih.gov/pubchem/patent/SU-1647154-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_981f6b8b03794809c1c758d12e8bef42 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21F5-00 |
| filingDate | 1989-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1991-05-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_df4c5d82398297ac42328ee0281a2891 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_20cd75a1c6e7cd40540acbf7622e2905 |
| publicationDate | 1991-05-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | SU-1647154-A1 |
| titleOfInvention | Method of locating outburst-prone face-adjoining zone of coal bed |
| abstract | The invention relates to mining promet and m. used in the development of coal seams prone to sudden emissions of coal and gas. The purpose of the invention is to improve the accuracy and reliability of determining the non-hazardous pre-break zones of coal seams during mining operations. The invention relates to the mining industry and can be used in the development of coal seams prone to sudden outbursts of coal and gas. The purpose of the invention is to improve the accuracy and reliability of determination of the emitted hazardous areas of coal seams during mining operations by taking into account changes in the stress state and gas state of the reservoir. The method is carried out as follows. works by taking into account changes in the stress and gas state of the reservoir. From the borehole, drill holes in the interval and seal their mouths. Gas volume is measured during drilling and cleaning of the bore-hole, the output of drilling fines, the time of drilling and cleaning of the bore-hole at a depth of 5–10 m and determine the stabilized value of the maximum effective gas content (EG) before the next extraction cycle. Then, the magnitude of the main compressive stresses, the tensile and compressive strength of the coal, the parameters of the sorption isotherm, the porosity and the temperature of the coal seam are determined. These parameters establish the critical value of the EG by the above formula. The maximum EG value is compared with its critical value, and the outburst hazard of the formation is estimated from the comparison results. If the maximum EG value is greater than the EG critical value, the zone of the reservoir is considered outburst-hazardous, and if the maximum EG value is less critical, the zone of the reservoir is considered non-hazardous. Before each successive nth cycle of coal extraction from the bottom of the preparatory or cleaning development of the drill hole hole. Moreover, in the preparatory development, the determination of the maximum stabilized gas content is made by two boreholes, which are drilled at a distance of 0.5 m to the left and right of the walls of the excavation. And in the sewage disposal sites proceed as follows. With a solid development system, boreholes are drilled in the upper, lower lava clump and in the middle, with a pillar design system СЬ ьл 1 |
| priorityDate | 1989-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 18.