An anti-shock interval grouting anchor cable and its application method

Abstract

The invention discloses an impact-resistant interval grouting anchor cable and a use method of the impact-resistant interval grouting anchor cable. The impact-resistant interval grouting anchor cable comprises a one-way grouting valve, a hollow grouting stranded steel wire, an arc-shaped anchor ring, a sliding pressure yielding retraction ring, a tapered grout blocking plug and a subsection sealing plug, the sliding pressure yielding retraction ring is arranged between the arc-shaped anchor ring and the tapered grout blocking plug, grout discharge valves are arranged on a flexible grouting pipe in the hollow grouting stranded steel wire at certain-length intervals, the subsection sealing plug is arranged at the front end of an expansion area of the stranded steel wire, and interval grouting is achieved. The using method comprises the steps that a grouting section L2n-1 and a non-grouting section L2n are arranged according to coal petrography mechanical parameters of a construction location, initial resin anchoring is carried out on the interval grouting anchor cable, the interval grouting anchor cable is tensioned and pre-tightened, grouting materials are prepared, and a grouting pump is used for achieving the interval grouting on the grouting anchor cable. According to the condition of surrounding rock, the grouting section and the non-grouting section are arranged, the force bearing condition of a supporting system is scientifically improved, the instant high stress state, caused by the intense deformation of the surrounding rock, of the stranded steel wire of the anchoring section is relieved, and an anchor cable support is prevented from losing efficacy.

Description

Technical field

[0001] The invention relates to a grouting anchor cable used for supporting projects such as rock soil, water conservancy, and mines. Background technique

[0002] Because of its large anchoring depth, high bearing capacity, and large pre-tightening force, the anchor cable can obtain an ideal supporting effect. In practical applications, the combined support method of bolt and cable is usually adopted. In the initial stage of roadway support, the flexible support of the bolt is the main method, and the suspension function of the anchor cable is the main function in the later period. The overall supporting performance of anchor rods and cables. However, in thick coal seams with poor stability, such as roadway driving along goafs, large cross-section cuts, and cross-mining roadways affected by dynamic pressure, the anchorage length is only 1 / 3 of the anchor cable length, so its bearing capacity It is too low and has limited reinforcement effect on broken top coal....

Examples

Embodiment Construction

[0019] Such as Figure 1 ~ Figure 3 As shown, the present invention is an anti-impact interval grouting anchor cable and its use method, including one-way grouting valve 1, hollow grouting steel hinge line 2, arc anchor ring 3, sliding pressure shrinking ring 4, cone Stop grouting plug 5, segmented sealing plug 6, the one-way grouting valve 1 is set at the end of the hollow grouting steel hinge line for one-way high-pressure grouting, arc anchor ring 3, sliding pressure shrinking ring 4, A through hole is provided between the tapered grouting plug 5 and the segmented sealing plug 6, and the hollow grouting steel hinge line 2 passes through the through hole. The hollow grouting steel strand 2 is composed of a flexible grouting pipe 14, a hollow steel strand 15 and a steel strand expansion ring 16. The hollow steel strand 15 is provided with a steel strand expansion ring 16 every certain length to make the steel strand expand. Spread, the flexible grouting pipe 14 passes along t...

Technical field

[0001] The invention relates to a grouting anchor cable used for supporting projects such as rock soil, water conservancy, and mines. Background technique

[0002] Because of its large anchoring depth, high bearing capacity, and large pre-tightening force, the anchor cable can obtain an ideal supporting effect. In practical applications, the combined support method of bolt and cable is usually adopted. In the initial stage of roadway support, the flexible support of the bolt is the main method, and the suspension function of the anchor cable is the main function in the later period. The overall supporting performance of anchor rods and cables. However, in thick coal seams with poor stability, such as roadway driving along goafs, large cross-section cuts, and cross-mining roadways affected by dynamic pressure, the anchorage length is only 1 / 3 of the anchor cable length, so its bearing capacity It is too low and has limited reinforcement effect on broken top coal....

Examples

Embodiment Construction

[0019] Such as Figure 1 ~ Figure 3 As shown, the present invention is an anti-impact interval grouting anchor cable and its use method, including one-way grouting valve 1, hollow grouting steel hinge line 2, arc anchor ring 3, sliding pressure shrinking ring 4, cone Stop grouting plug 5, segmented sealing plug 6, the one-way grouting valve 1 is set at the end of the hollow grouting steel hinge line for one-way high-pressure grouting, arc anchor ring 3, sliding pressure shrinking ring 4, A through hole is provided between the tapered grouting plug 5 and the segmented sealing plug 6, and the hollow grouting steel hinge line 2 passes through the through hole. The hollow grouting steel strand 2 is composed of a flexible grouting pipe 14, a hollow steel strand 15 and a steel strand expansion ring 16. The hollow steel strand 15 is provided with a steel strand expansion ring 16 every certain length to make the steel strand expand. Spread, the flexible grouting pipe 14 passes along t...

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