Mine Tunnel Roof Support Self Drilling Rock Anchor Bolt
IntroductionConcrete Anchor Bolts for Coal Mining is a bolting
solution for unstable ground conditions such as sand, gravel, silt,
and clays, and in soft to medium fractured rock formations.For
projects facing above geo-conditions, hollow bar self-drilling
anchor should be considered as the main solution cuz it's designed
for optimized installation, tailored to the project's needs.By
drilling a hole in collapsing soil or loose lock, with a
sacrificial drill bit an a hollow bar, and after the drilling
operation injecting cementitious grout or resin into the hollow bar
and surrounding cavity, it's a top solution choice. Mine
Tunnel Roof Support Self Drilling Rock Anchor
Bolt ParameterTypeMETAL BAR Diameter(mm) anchoring
KNdeformed steel bar
6s≥335MPaφ22>125φ20>105φ18>85φ16>75round steel bar
6s≥235MPaφ22>90φ20>70φ18>60φ16>50dlength1400160018002000220024002600φ16-+++---φ18-++++--φ20--++++-φ22---++++
SPEC. MATERIAL BEARING
CAPACITY (kn) HIGH-STRENGTH
PLATE(Spherical) SIZE (mm) BEARING CAPACITY
(kn) BORE DIAMETER (mm) All-Thread Rebar Rock
Bolt DQ-16 HRB335 ≥100 120×120×6 ≥125 23 DQ-18 HRB335 ≥125 120×120×8 ≥170 23 DQ-20 HRB335 ≥155 120×120×8 ≥170 26 DQ-22 HRB335 ≥185 150×150×8 ≥220 26Mine
Tunnel Roof Support Self Drilling Rock Anchor Bolt Photos/*
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