Deformation Rules for Surrounding Rock in Directional Weakening of End Roofs of Thin Bedrocks and Ultrathick Seams

<div>Layout of measuring points and lines of prefabricated roof fracture.</div>

Advances in Civil Engineering

Figure 6: Deformation Rules for Surrounding Rock in Directional Weakening of End Roofs of Thin Bedrocks and Ultrathick Seams 