The goaf subsidence can be reduced to about . . . . . . . . of the amount caused by caving in hydraulic stowing.
A. $$\frac{1}{2}$$
B. $$\frac{1}{3}$$
C. $$\frac{1}{4}$$
D. $$\frac{1}{5}$$
Answer: Option D
This Question Belongs to Mining Engineering >> Coal Mining
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