| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2015: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2014: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
|
|---|
| Outline of Final Research Achievements |
In this study, on-site tests on spontaneous combustion were carried out at the place close to the coal mining area in Indonesia and China. The on-site tests were conducted and plotted with Frank-Kamenetskii’s equation using maximum 1ton fresh low-rank coal samples transferred from the coal mines. Industrial analysis and differential thermal analysis were measured for the coals used for the on-site tests. Based on on-site test results and measured basic data, a numerical model of spontaneous combustion process of the low-rank coal has been constructed. In particular, with respect to coal deposition amount in ton order, we have carried out history matching of the temperature rise process of internal coal deposition layer, and numerical simulations applied to the oxidation area vs. porosity at goaf in the actual scale of coal mine. It has become clear that the grouting is effective to control the oxidation area to prevent spontaneous combustion in the goaf.
|
