<p>Bearing structure in cross point 2 without support when the horizontal press coefficient is (a) <i>λ</i> = 1; (b) <i>λ</i> = 1.5; and (c) <i>λ</i> = 2.</p
<p>Grouting effect of multi-echelon support in (a) cross point 1; (b) cross point 2.</p
<p>Multi-echelon support design of (a) excavation roadway; (b) first-layer support; (c) second-layer...
<p>Similar material standard rock samples of the (a) first group; (b) second group; and (c) third gr...
<p>Bearing structure in cross point 1 without support when the horizontal press coefficient is (a) <...
<p>Bearing structure of the cross point 2 under multi-echelon support when the horizontal press coef...
<p>Multi-echelon support design of the cross point 2 when the horizontal press coefficient is (a) <i...
<p>Surrounding rock burst development in cross point 1 without support when horizontal press coeffic...
<p>Surrounding rock burst development in cross point 2 without support when horizontal press coeffic...
<p>Surrounding rock burst development in cross point 1 with multi-echelon support when horizontal pr...
<p>Loosing circle in cross point 2 (a) without support; (b) with multi-echelon support.</p
<p>Loosing circle in cross point 2 (a) without support; (b) with multi-echelon support.</p
<p>Loosing circle in cross point 1 (a) without support; (b) with multi-echelon support.</p
<p>Loosing circle in cross point 1 (a) without support; (b) with multi-echelon support.</p
<p>Concentration degree of tangential stress in cross point 2 (a) without support and (b) with multi...
We study the structural instability mechanism and effect of a multi-echelon support in very-deep roa...
<p>Grouting effect of multi-echelon support in (a) cross point 1; (b) cross point 2.</p
<p>Multi-echelon support design of (a) excavation roadway; (b) first-layer support; (c) second-layer...
<p>Similar material standard rock samples of the (a) first group; (b) second group; and (c) third gr...
<p>Bearing structure in cross point 1 without support when the horizontal press coefficient is (a) <...
<p>Bearing structure of the cross point 2 under multi-echelon support when the horizontal press coef...
<p>Multi-echelon support design of the cross point 2 when the horizontal press coefficient is (a) <i...
<p>Surrounding rock burst development in cross point 1 without support when horizontal press coeffic...
<p>Surrounding rock burst development in cross point 2 without support when horizontal press coeffic...
<p>Surrounding rock burst development in cross point 1 with multi-echelon support when horizontal pr...
<p>Loosing circle in cross point 2 (a) without support; (b) with multi-echelon support.</p
<p>Loosing circle in cross point 2 (a) without support; (b) with multi-echelon support.</p
<p>Loosing circle in cross point 1 (a) without support; (b) with multi-echelon support.</p
<p>Loosing circle in cross point 1 (a) without support; (b) with multi-echelon support.</p
<p>Concentration degree of tangential stress in cross point 2 (a) without support and (b) with multi...
We study the structural instability mechanism and effect of a multi-echelon support in very-deep roa...
<p>Grouting effect of multi-echelon support in (a) cross point 1; (b) cross point 2.</p
<p>Multi-echelon support design of (a) excavation roadway; (b) first-layer support; (c) second-layer...
<p>Similar material standard rock samples of the (a) first group; (b) second group; and (c) third gr...