| 摘要 |
The method produces an elongated rock cavern tunnel, or shaft, preferably with a large cross-sectional area. At least one drilling drift is first driven in the longitudinal direction of the cavern. From that drilling drift first drill holes are drilled in successive planes extending transversely to the longitudinal axis of the intended cavern. Charging and blasting is carried out in the first drill holes for excavating the cavern layer by layer. The first drill holes are drilled in an essentially ring or fan-shaped pattern and partially outside the intended contour of the cavern. Rock strengthening means is inserted beyond the contour in the drill holes prior to blasting so that the cavern walls and roof have such a degree of stability that work for reinforcing the walls and roof subsequent to blasting can be carried out within the cavern, or that the cavern can be used for its intended purpose, for example for storing liquids, without any further reinforcement following the removal of the blasted rock.
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