Accurate Perception of Rock Strata Movement for Environmental Protection in Coal Mining: Taking Thick and Hard Roof Cooperative Control as an Example

<div>Breakage and migration characteristics of surrounding rocks under different immediate roof filling coefficients. (a) <i>N</i> = 1. (b) <i>N</i> = 2. (c) <i>N</i> = 3.</div>

Advances in Civil Engineering

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Figure 12

Figure 12: Accurate Perception of Rock Strata Movement for Environmental Protection in Coal Mining: Taking Thick and Hard Roof Cooperative Control as an Example 

Figure 12 | Accurate Perception of Rock Strata Movement for Environmental Protection in Coal Mining: Taking Thick and Hard Roof Cooperative Control as an Example 