Advances in Civil Engineering / 2018 / Article / Fig 6

Research Article

Safety Mining Technology of Coal Seams in Weathered Zone Based on Ground J-Type Pregrouting Reinforcement

Figure 6

Comparison of the microstructures of rock masses in the weathered zone (2000 magnifications, 20 με): microstructure of the samples in the (a) unreinforced section and (b) after grouting reinforcement.
(a)
(b)

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