Prestressed Steel Wire Manufacturers

Advantage:

1.Adopting reverse grouting to simplify the process, so that the slurry fully fills the borehole, while the steel strand reaches the requirement of high-pressure grouting, realizing the combination of anchor injection and avoiding the repetition of construction steps.

2. Combining ordinary anchor cable and grouting into one, it increases the strength of the new rock body by about 40% through anchor injection and gluing the surrounding rock, and realizes the self-control active support of the surrounding rock.

3. The strand is processed with pre-stressed spiral ribs. Tests have proved that the anchoring force of pre-stressed spiral ribbed strand is greatly increased compared with anchor cables made of smooth strand of the same diameter.

These advantages make the product more efficient and reliable in the support project, and can effectively improve the strength of the surrounding rock and the support effect.

Contact Now

Product Details

Product Description:

Mining anchor ropes are mainly used in coal mines or other mines, shafts and alleys, as well as in the engineering of surrounding rock reinforcement. Traditional anchor support forms and parameters are often difficult to support effectively in mine roadways, which may lead to the collapse of the overall support structure, resulting in serious consequences. Since there is no limitation on the length of the steel strand, the anchor cable can be looped and fixed on the hard top plate. At the same time, as the steel strand has a high strength level, it can provide a large prestressing force, so that the composite roof plate under the anchor cable loop forms a uniform rigid structure, which plays a good supporting role. This kind of mining anchor cable can effectively improve the stability and safety of the mine tunnel, ensure the strong support of the surrounding rock, and prevent the structure from collapsing, which can play an important role in the construction of the project.

Prestressed Steel Wire Manufacturers

Specifications and parameters:

Specification
model number	Nominal Diameter	tensile strength	cross-sectional area	Weight per meter	Maximum force on the entire strand	0.2% yield force	Maximum force Total elongation	Stress relaxation properties
								Initial load phase When dry real meta product Percentage of Power Number	1000 hours Stress relaxation rate

	D,/mm	Rm/MPa	S,/mm2	g/m	Fm/kN	Fp₀₂/kN	A/%	%F ma	r/%
1*7	9.50	1860	54.8	430	102	89.8	3.5	70 80	2.5 4.5
	12.70		98.7	775	184	162
	15.20		140	1101	260	229
	15.70		150	1178	279	246
	17.80		191	1500	355	311
	18.90		220	1727	409	360
	21.60		285	2237	530	466
1*7	9.50	1960	54.8	430	107	94.2
	12.70		98.7	775	193	170
	15.20		140	1101	274	241
1*71	12.7	1860	98.7	775	184	162
	15.20	1860	140	1101	260	229
1*19S (1+9+9)	21.80	1860	313	2482	583	513
1*19W (1+6+6/6)	28.60	1860	532	4229	990	854

Prestressed Steel Wire Manufacturers

Mining anchorage performance parameters, the explanation of its parameters:

a. Anchor static load anchorage performance ηa ≥ 0.95 εapu ≥ 2.0%: ηa is the coefficient of anchorage static load anchorage performance, the value should be not less than 0.95, εapu is the deformation rate of the anchor cable under static loading, the requirement is not less than 2.0%, which indicates the deformation limitation of the anchor cable and its stability performance when it undergoes static loading.

b. Fatigue loading performance: meet 2 million times cyclic loading: the anchor cable needs to meet after 2 million times cyclic loading still maintain stable and reliable performance, indicating its durability and fatigue strength.

c. Cyclic loading performance: meet 50 times cyclic loading: the anchor cable needs to meet the 50 times cyclic loading to maintain stable performance, applicable to a certain cycle within the cycle of loading.

d. Anchor pull-out resistance: Tw＞1.05Nt=157.5KN: The pull-out resistance Tw of the anchor cable is required to be greater than 1.05 times Nt, where Nt is equal to 157.5 kilonewtons (157.5KN), indicating that the anchor cable needs to have a pull-out resistance exceeding the specified value to ensure safety and reliability in the process of use.

Prestressed Steel Wire Manufacturers

Using method, the following are the general step-by-step instructions:

1. Drill suitable holes according to the diameter and length of the anchor cable to ensure that the hole size meets the design requirements;

2. Remove debris in the hole to ensure that the inside of the hole is clean for subsequent operation;

3. Select the appropriate amount of resin anchoring agent according to the design requirements and inject it into the hole;

4. Push the resin anchoring agent to the bottom of the hole using the anchor cable to ensure that the resin fills the whole hole;

5. Connect the end of the anchor cable to the anchor drilling rig connector and prepare for mixing;

6. turn on the anchor drilling rig and stir the resin anchoring agent according to the specified stirring time to ensure that the resin is fully mixed;

7. Wait for the resin anchoring agent to solidify and then install the supporting devices such as pallets and anchors;

8. use the tensioner to pull the anchor cable to the specified pre-tensioning force to ensure that the support structure is stable and reliable.

Prestressed Steel Wire Manufacturers