Our strategy for Mine and Dine level 15-8 is to fire the first White bird straight ahead, dropping its bomb on the left side and ricocheting into the structure. Fire the first Yellow bird into the same spot, trying to reach the TNT. With the next White bird, loft a little over the debris of the left structure, dropping the bomb on the right side of the pile and ricocheting the bird into the last set of stalactites. The TNT should have triggered by now, and the stalactite will clear the right tower. The score in the video below is 126,140.
Alternate higher scoring method by Sizeuk, scoring 135,040.