99/02356 Stress relief reactions in coal seams
- Publisher
- Elsevier Science
- Year
- 1999
- Weight
- 395 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0140-6701
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β¦ Synopsis
oxidating salts). The nitrate salts and organic phase are mixed with or without emulsifier. The emulsion explosive is sensitized by either injection of air, use of gas generating reactions or use of hollow particles. Cooling agents are added and the material is loaded into a cartridge wrapped in paper. The explosive cartridge has a detonation rate of 4800 m/s, 60% explosive power and short mortar test of l/10. The explosive is suitable for use in flammable environments, such as underground coal mines.
99102346
Geochemistry and ground-water flow beneath an abandoned coal mine reclaimed with pressurized fluidized bed combustion by-products
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With the increase in mining depth, the danger of coal and gas outbursts increases. In order to drain coal gas effectively and to eliminate the risk of coal and gas outbursts, we used a specific number of penetration boreholes for draining of pressure relief gas. Based on the principle of overlying s