Mechanism of Roof Shock in Longwall Coal Mining under Surface Gully

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td align="left">Property</td><td align="center">Density, kg/m<sup>3</sup></td><td align="center">Shear modulus, Pa</td><td align="center">Bulk modulus, Pa</td><td align="center">Friction angle, °</td><td align="center">Dilation angle, °</td></tr><tr><td align="center" colspan="6"><hr/></td></tr><tr><td align="left">Value</td><td align="center">2410</td><td align="center"><span style="width: 41.4677ptpx;"><svg height="8.91176pt" id="M8" style="vertical-align:-0.2130003pt" version="1.1" viewbox="-0.0498162 -8.69876 41.4677 8.91176" width="41.4677pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0135,0,0,-0.0135,0,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z" id="g113-50"></path><glyph.data ascent="3473" descent="-2876" 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Input parameters for the double yield model.

Shock and Vibration

tab3

Table 3

Table 3: Mechanism of Roof Shock in Longwall Coal Mining under Surface Gully 