| 发明名称 |
METHOD FOR COAL EXTRACTION FROM SAFETY PILLARS |
| 摘要 |
Method for coal extraction from safety pillars includes sequential drilling wells in seam, with partial overlapping a cut of well drilled before and ceiling. The wells are drilled within seam, without distortions in ceiling, with formation of supportperforated plate by leaving inter-well pillars with width 0.3-1.5 m and with application of strengthening mix to well walls.
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| 申请公布号 |
UA28173(U) |
申请公布日期 |
2007.11.26 |
| 申请号 |
UA20070008856 |
申请日期 |
2007.07.31 |
| 申请人 |
UKRAINIAN STATE SCIENTIFIC-RESEARCH AND DESIGNINGINSTITUTE OF MINE GEOLOGY, GEOMECHANICS AND MINE SURVEY |
发明人 |
KHODYRIEV YEVHEN DMYTROVYCH;FILATOV VALERII FEDOROVYCH;ANTSYFEROV VADYM ANDRIIOVYCH |
| 分类号 |
E21C41/00 |
主分类号 |
E21C41/00 |
| 代理机构 |
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