Bending Moment Characteristics of Hard Roof before First Breaking of Roof Beam Considering Coal Seam Hardening

<div>Support pressure of coal seam when working face advancing [<a href="/journals/sv/2018/7082951/#B23">23</a>].</div>

Shock and Vibration

Figure 2: Bending Moment Characteristics of Hard Roof before First Breaking of Roof Beam Considering Coal Seam Hardening 