The Key Stratum Structure Morphology of Longwall Mechanized Top Coal Caving Mining in Extra-Thick Coal Seams: A Typical Case Study

<div>Structure characteristics of low cantilever beam and high hinged rock beam.</div>

Advances in Civil Engineering

Figure 5: The Key Stratum Structure Morphology of Longwall Mechanized Top Coal Caving Mining in Extra-Thick Coal Seams: A Typical Case Study 