Table 2 Orthogonal test factor level.

From: Research and application of high gas coal seam air leakage control technology based on polymer material cross-linking mechanism

Level

A. Alginate concentration/%

B. Amount of alginate/(L/m2)

C. Calcium chloride concentration/%

D. Amount of calcium chloride/(L/m2)

1

1

2

5

2

2

1.25

3

7.5

3

3

1.5

4

10

4

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