Table 5 Overview of top and bottom plate of 110,904 working face.

From: Diffusion law of coal gangue slurry and the application of fluidized filling technology of gangue in caving area

Category

Lithology

Thickness/m

Characteristic

False roof

Limestone

1.3

Gray black, dense and hard

Immediate roof

Mudstone

8.2

Black has a fossilized root and a single delicate structure

Main roof

Siltstone

9.9

The black lithology is single, containing schistose pyrite

Direct bottom

Siltstone

4.4

Gray, grayish purple with thin layers of medium to coarse grained sandstone

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