Study on the “Pressure Relief and Yielding Support” Joint Prevention and Control Technology for the Weak Impact Roadway in the Extremely Thick Coal Seam

<div>Vertical stress of stepped driving. (a) Nonstepped driving. (b) Stepped driving.</div>

Advances in Civil Engineering

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Figure 10

Figure 10: Study on the “Pressure Relief and Yielding Support” Joint Prevention and Control Technology for the Weak Impact Roadway in the Extremely Thick Coal Seam 

Figure 10 | Study on the “Pressure Relief and Yielding Support” Joint Prevention and Control Technology for the Weak Impact Roadway in the Extremely Thick Coal Seam 