High Strength Tunnel Rock Bolt Self Drilling Mining Anchor Bolt

• Material: Stainless Steel
• Type: Round Head
• Connection: Hinged Bolts
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: METAL BAR
• Head Style: Round
• Application: Machinery, Environmental, Building
• Finish: Black
• Metal Bar Diameter(mm): 22
• Transport Package: Wooden
• Origin: China
• Production Capacity: 100000 Sets Per Month

Product Description

  High Strength Tunnel Rock Bolt Self Drilling Mining Anchor Bolt Introduction

Concrete 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.

  High Strength Tunnel Rock Bolt Self Drilling Mining Anchor Bolt Parameter

Type	METAL BAR Diameter(mm)	anchoring KN
deformed steel bar 6s≥335MPa	φ22	>125
	φ20	>105
	φ18	>85
	φ16	>75
round steel bar 6s≥235MPa	φ22	>90
	φ20	>70
	φ18	>60
	φ16	>50

d	length
	1400	1600	1800	2000	2200	2400	2600
φ16	-	+	+	+	-	-	-
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	26

  High Strength Tunnel Rock Bolt Self Drilling Mining Anchor Bolt Photos