FIELD: mining.
SUBSTANCE: method includes extracting coal pillars by conducting shrink stoping from pit wall to mine-field boundary and leaving supporting coal pillars between shrink stoping. A coal pillar is divided into blocks; supporting coal pillars are left between the blocks so that the width of each exceeds the maximum width of a pillar and when it is reduced, destruction of pillar by rock pressure occurs. The length of shrink stoping is defined according to the mathematical expression.
EFFECT: higher stiffness of shrink stoping and labour efficiency of conducting thereof.
3 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SUPPORTING MINE WORKINGS IN ADJACENT COAL SEAMS | 1999 |
|
RU2167301C1 |
| CONTROL METHOD OF POORLY CAVING ROOF AT ENTRY OF MECHANISED COMPLEX TO REMOVAL CHAMBER | 2011 |
|
RU2472936C1 |
| METHOD FOR OPEN-UNDERGROUND DEVELOPMENT OF FLAT-LYING FORMATIONS | 2019 |
|
RU2715503C1 |
| METHOD FOR DEVELOPING AREA OF FLAT AND SLOPE SEAM LIABLE TO ROCK-BUMPS | 2011 |
|
RU2459079C1 |
| PROCESS OF DEVELOPMENT OF THICK GENTLY DIPPING COAL FORMATIONS WITH ROOF ROCKS DIFFICULT TO FALL | 2002 |
|
RU2219341C1 |
| METHOD OF DEVELOPMENT OF FLAT DIPPING BEDS OF MINERALS | 2008 |
|
RU2357081C1 |
| METHOD FOR UNDERGROUND EXTRACTION OF MINERAL RESOURCE FORMATIONS | 2005 |
|
RU2298099C1 |
| METHOD FOR COMBINED DEVELOPMENT OF DEPOSITS | 1996 |
|
RU2117155C1 |
| METHOD OF UNDERGROUND DEVELOPMENT OF MINERAL DEPOSITS | 2020 |
|
RU2736107C1 |
| OPEN-UNDERGROUND METHOD OF BEDDED DEPOSITS MINING | 2010 |
|
RU2439321C1 |
