Study on Antiweathering Support Technology of Thin Spray-On Liners in Shallowly Buried Coal Seam Roadway under Corrosion Condition

Figure 4

Scanning electron microscopy of mudstone and siltstone. (a) Mudstone magnification 200 times. (b) Mudstone magnification 500 times. (c) Mudstone magnification 2,000 times. (d) Mudstone magnification 5,000 times. (e) Siltstone magnified 200 times. (f) Siltstone magnified 500 times. (g) Siltstone magnified 2,000 times. (h) Siltstone magnified 5,000 times.

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