FIELD: underground coal mining and environmental control. SUBSTANCE: method includes drilling of holes towards each other 3-5 m long and at angles of shifting of depositions to form ditches on hole joints for preservation of water. Distance between ditches equals step of caving or lowering of rocks of bed immediate roof. Ditch sides are reinforced by solutions f heavy clays harmless for rice seedlings. EFFECT: prolonged durability of ground strengthening and efficiency of rice cultivation due to provision of water gathering on rice field and its preservation in vegetable layer of ground. 2 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR EXTRACTING THICK STEEP COAL SEAM BY HORIZONTAL DESCENDING LAYERS WITH COMPLETE FILLING OF WORKED-OUT SPACE | 1997 |
|
RU2135771C1 |
| METHOD FOR CONTROL OF UNSTABLE ROOF IN LONG STOPING FACES | 1997 |
|
RU2136886C1 |
| METHOD FOR PROTECTING SOIL FROM POLLUTION WITH MINE WATER | 1997 |
|
RU2127367C1 |
| METHOD FOR PRESERVING SURFACE IN UNDERGROUND MINING OF COAL | 1996 |
|
RU2096616C1 |
| METHOD FOR PROTECTION OF UNDERGROUND WORKINGS AND SURFACE SOIL FROM FOULING WITH MINE WATER | 1997 |
|
RU2126484C1 |
| METHOD FOR PRESERVATION OF EARTH SURFACE AT UNDERGROUND MINING OF COAL | 1997 |
|
RU2124636C1 |
| METHOD OF ROOF CONTROL IN MULTILAYER SIMULTANEOUS EXTRACTION OF THICK GENTLY SLOPPING COAL SEAM AND DEVICE FOR ITS EMBODIMENT | 1994 |
|
RU2091584C1 |
| TOROIDAL SUPPORT OF BREAKAGE FACE | 1999 |
|
RU2151875C1 |
| METHOD FOR ROOF CONTROL AT LAYER-BY-LAYER EXTRACTION OF THICK FLAT-LYING COAL SEAM | 1996 |
|
RU2096619C1 |
| PROCESS CONTROLLING ROOF | 2000 |
|
RU2184241C2 |
