Proposition.

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Note added at 21 mins (2019-11-22 15:32:04 GMT)
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Contour blasting is also called controlled blasting as its main purpose is to minimize the damage to the rock (overbreak) beyond the boundary of the designed contour of the excavation.
https://link.springer.com/chapter/10.1007/978-981-10-1989-0_...
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The choice of a reasonable excavation sequence and contour blasting method is one of the key techniques for the construction of underground powerhouses.
https://www.sciencedirect.com/science/article/abs/pii/S08867...
Option:
contour borehole torpedoing
For the restoration of the water yield from the non-pressurized aquifers, and for the increasing of the productivity of the low-yield boreholes, they use the explosive torpedoes, which are manufactured of the detonating cord within the waterproof sheath (see the "Torpedoing of the boreholes" article).

During the 1879, the French scientist Mesen has proposed as the means for the explosion the cord with the core of the grained guncotton, which was the prototype for the modern detonating cord. During the end of the 19th century, at the productive petroleum fields within Russia, there have been conducted the blasting works within the boreholes (the torpedoing), with the purpose of the increasing of the petroleum recovery from the layers.

http://mining-enc.com/e/explosive-technology/