Segmented mine grouting anchor cable

Abstract

The utility model discloses a sectional type mining grouting anchor cable, including anchor cable end, the anchor cable end is arranged in one end of anchor cable structure, still include the connecting module for constituting the thrust type connecting structure, the main module for constituting sectional type anchor cable structure and the grouting module for constituting the assembly type grouting structure, the connecting module is arranged in one end of anchor cable end, and the main module is arranged in one end of connecting module away from anchor cable end, and the grouting module is assembled in one end of anchor cable end away from connecting module, the utility model has the beneficial effect that is equipped with the connecting module and grouting module cooperation, constitutes the assembly type grouting end, guarantees the assembly precision while being convenient for to its end part to carry out the dismounting maintenance, and the use flexibility is strong, is equipped with the main module, adopts the multi -section type cable body structure, and the cable body side part is bored and is equipped with a plurality of grouting holes, can guarantee anchor cable grouting effect, can also increase the bonding area and pressure -relief effect of cementation body, improves the anchoring effect.

Description

Technical Field

[0001] This utility model relates to the field of grouting anchor cable technology for mining, and in particular to a segmented grouting anchor cable for mining. Background Technology

[0002] In existing technologies, as coal mining depths increase, the surrounding rock in the mine becomes increasingly fractured and under high ground pressure, leading to intensified delamination of deep rock strata. The cross-sections of underground roadways and chambers also increase, further exacerbating the pressure. This makes deep, soft rock roadways a persistent challenge for coal mine support. Many mines have experimented with various types of rock bolt supports in soft rock roadways. However, the fractured and low-strength surrounding rock in deep, soft rock roadways, with its large loosened zone, makes it impossible to provide a stable point of application for the rock bolts. Therefore, simply using ordinary rock bolts is insufficient to support high-pressure soft rock roadways. Hollow grouting anchors can achieve full-length anchoring and grouting reinforcement of the surrounding rock in roadways. In recent years, they have been widely used in coal mine roadway support. The construction procedure for hollow grouting anchors is as follows: first, end anchors are installed using resin anchoring agents; then, grout stop plugs, trays, and rigging are installed and tensioned. After reaching the designed pre-tension force, the tensioning equipment is removed, and grout is injected into the borehole. Grouting is stopped once the grouting pressure reaches a certain value. As can be seen from the construction process, the cable body can be divided into three parts, from the outside to the inside: the tensioning and pre-tightening section, the grouting and anchoring section, and the resin anchoring section. The tensioning and pre-tightening section of the cable body cannot be compressed or contracted, otherwise the anchor will slip and reduce the pre-tightening force; the grouting and anchoring section can be bent; the resin anchoring section cannot be contracted during tensioning, otherwise the cable body will separate from the anchoring agent, affecting the anchoring quality. However, in the existing technology, the grouting anchor cable is made of an integral steel pipe, which cannot be bent, resulting in poor anchoring effect.

[0003] Chinese utility model patent application number 202222957048.4 discloses a hollow grouting anchor cable for mining, including a cable body. The cable body includes a coaxially fixed and connected core steel pipe and a thin-walled threaded steel pipe. The core of the cable body formed by the core steel pipe and the thin-walled threaded steel pipe is wound with steel wire. A grouting joint is fixedly connected to the end of the core steel pipe away from the thin-walled threaded steel pipe. The thin-walled threaded steel pipe extends to the end of the cable body through the grouting anchoring section. Several grout outlet holes located in the grouting anchoring section are opened on the pipe wall of the thin-walled threaded steel pipe. An anchoring agent stirring claw that seals the inner hole of the thin-walled threaded steel pipe is fixedly connected to the end of the cable body. Several stirring teeth arranged circumferentially are fixedly provided at the end of the anchoring agent stirring claw away from the thin-walled threaded steel pipe. However, the anchorage and tray of this type of mining hollow grouting anchor cable are fixedly assembled, making it impossible to disassemble and maintain them, resulting in poor flexibility of use. The cable body only has grout outlet holes in the support ring, which results in slow grouting efficiency and poor grouting effect. The bonding area between the cable body and the cemented body is small, leading to poor pressure relief and anchoring effect. Summary of the Invention

[0004] The purpose of this invention is to provide a segmented grouting anchor cable for mining.

[0005] To achieve the above objectives, the technical solution proposed by this utility model is as follows: A segmented mining grouting anchor cable includes an anchor cable end, which is arranged at one end of the anchor cable structure. It also includes a connecting module for forming a thrust connection structure, a main body module for forming a segmented anchor cable structure, and a grouting module for forming an assembled grouting structure. The connecting module is arranged at one end of the anchor cable end, the main body module is configured at the end of the connecting module away from the anchor cable end, and the grouting module is assembled at the end of the anchor cable end away from the connecting module.

[0006] The connecting module includes a connecting threaded rod and a connecting main rod. The connecting threaded rod is disposed inside the connecting end and is threadedly connected to the connecting end. The two ends of the connecting threaded rod protrude from the two ends of the connecting end, with one end located between the connecting end and the grouting module. The connecting main rod is disposed at the end of the connecting threaded rod away from the grouting module and is integrally formed with the connecting threaded rod. The interiors of the connecting threaded rod and the connecting main rod are hollow and interconnected.

[0007] It also includes a thrust ring, which is disposed on the outer middle part of the connecting threaded rod and engaged with the connecting threaded rod, and the connecting end abuts against the thrust ring.

[0008] The main module includes an anchor cable transition rod, an anchor cable main rod, and an anchor cable anti-detachment rod. The anchor cable transition rod is located at the end of the connecting main rod away from the connecting threaded rod, and one end of the transition rod is welded to the connecting main rod. The anchor cable main rod is located at the end of the anchor cable transition rod away from the connecting main rod and is welded to the anchor cable transition rod. The anchor cable anti-detachment rod is located at the end of the anchor cable main rod away from the anchor cable transition rod and is welded to the anchor cable main rod.

[0009] It also includes grouting holes, of which there are three. The three grouting holes are respectively arranged on the side of the anchor cable transition rod, the anchor cable main rod and the anchor cable anti-detachment rod and penetrate through the corresponding anchor cable transition rod, the anchor cable main rod and the anchor cable anti-detachment rod.

[0010] The anchor cable transition rod is configured as a straight rod structure, and the anchor cable main rod is composed of several groups of steel strands spirally wound and twisted together. The side of the anchor cable anti-detachment rod is provided with several spaced anti-detachment convex patterns, and the side corresponding to the grouting hole is configured as a planar structure. The anchor cable transition rod, the anchor cable main rod, and the anchor cable anti-detachment rod together constitute a segmented anchor cable structure, and its interior is configured as a hollow structure. The interior of the segmented anchor cable structure is connected to the interior of the connecting main rod.

[0011] The inner side of the end of the anchor cable away from the main module is set as an open structure, and its outer side is provided with anti-slip ribs.

[0012] It also includes a sealing structure, which includes a sealing ring, an anti-jamming ring, and an anti-jamming protrusion. The sealing ring is provided in two sets, which are arranged side by side at intervals inside the end of the anchor cable away from the main module and are sleeved with the connecting threaded rod. The anti-jamming ring is disposed between the two sets of sealing rings and fits against the sealing ring. The anti-jamming protrusion is provided in two sets, each set of which consists of several protrusions arranged in a circular pattern at even intervals. The two sets of anti-jamming protrusions are symmetrically arranged on both sides of the anti-jamming ring and are integrally formed with the anti-jamming ring. The anti-jamming ring fits against the sealing ring through the anti-jamming protrusion.

[0013] The grouting module includes a grouting end and a grouting washer. The grouting end is located at the end of the connecting threaded rod away from the connecting main rod and is threadedly connected to the connecting threaded rod. The end of the grouting end that is threadedly connected to the connecting threaded rod is inserted into the inner side of the anchor cable end. The grouting end has a grouting channel inside and its end away from the anchor cable end is set as a hexagonal nut structure. The grouting washer is disposed between the grouting end and the anchor cable end.

[0014] It also includes a pressure relief hole, which is located at the insertion point of the grouting end and the anchor cable end and extends through the grouting end.

[0015] The beneficial effects of this utility model are: It is equipped with a connecting module and a grouting module to form a prefabricated grouting end, which ensures assembly accuracy while facilitating disassembly and maintenance of the end part. It is highly flexible in use. It has a main module and adopts a multi-segment cable structure. Multiple grouting holes are drilled on the side of the cable, which can not only ensure the grouting effect of the anchor cable, but also increase the bonding area between the cable and the cemented body and the pressure relief effect, thereby improving the anchoring effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the grouting anchor cable of this utility model; Figure 3 This is a cross-sectional view of the anchor cable anti-detachment rod and the grouting hole of this utility model; Figure 4 This is a cross-sectional view of the sealing structure and the anchor cable end of this utility model.

[0017] In the diagram: 1. Anchor cable end; 2. Connecting threaded rod; 3. Connecting main rod; 4. Thrust ring; 5. Anchor cable transition rod; 6. Anchor cable main rod; 7. Anchor cable anti-detachment rod; 8. Grouting hole; 9. Sealing ring; 10. Anti-jamming ring; 11. Anti-jamming protrusion; 12. Grouting end; 13. Grouting washer; 14. Pressure relief hole. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. A segmented mining grouting anchor cable includes an anchor cable end 1, which is arranged at one end of the anchor cable structure. It also includes a connecting module for forming a thrust connection structure, a main body module for forming the segmented anchor cable structure, and a grouting module for forming an assembled grouting structure. The connecting module is arranged at one end of the anchor cable end 1, the main body module is located at the end of the connecting module away from the anchor cable end 1, and the grouting module is assembled at the end of the anchor cable end 1 away from the connecting module. A schematic diagram of the overall structure of this utility model is shown below. Figure 1 As shown.

[0019] The connecting module includes a connecting threaded rod 2 and a connecting main rod 3. The connecting threaded rod 2 is located inside the connecting end and is threadedly connected to the connecting end. Both ends of the connecting threaded rod 2 protrude from the connecting end, with one end positioned between the connecting end and the grouting module. The connecting main rod 3 is located at the end of the connecting threaded rod 2 furthest from the grouting module and is integrally formed with the connecting threaded rod 2. Both the connecting threaded rod 2 and the connecting main rod 3 have hollow interiors and are interconnected. The connecting module, through the cooperation of the connecting threaded rod 2 and the connecting main rod 3, forms a connecting structure at one end of the main module to achieve the assembly connection between the main module and the anchor cable end 1. The connecting threaded rod 2 provides installation support for the anchor cable end 1, the connecting main rod 3, and the grouting module, and meets the assembly connection requirements between the anchor cable end 1 and the connecting main rod 3. The connecting main rod 3 serves as the connecting structure at one end of the connecting module, thereby achieving the installation connection between the connecting threaded rod 2 and the main module. A cross-sectional view of the grouting anchor cable of this utility model is shown below. Figure 2 As shown.

[0020] It also includes a thrust ring 4, which is located on the outer middle of the connecting threaded rod 2 and engages with the connecting threaded rod 2. The connecting end abuts against the thrust ring 4. The thrust ring 4 is used as a positioning thrust structure on the side of the connecting threaded rod 2 to limit the position of the anchor cable end 1.

[0021] The main module includes an anchor cable transition rod 5, an anchor cable main rod 6, and an anchor cable anti-detachment rod 7. The anchor cable transition rod 5 is located at the end of the connecting main rod 3 away from the connecting threaded rod 2, and one end of it is welded to the connecting main rod 3. The anchor cable main rod 6 is located at the end of the anchor cable transition rod 5 away from the connecting main rod 3 and is welded to the anchor cable transition rod 5. The anchor cable anti-detachment rod 7 is located at the end of the anchor cable main rod 6 away from the anchor cable transition rod 5 and is welded to the anchor cable main rod 6. The main module, through the cooperation of the anchor cable transition rod 5, the anchor cable main rod 6, and the anchor cable anti-detachment rod 7, forms a segmented main structure, ensuring the overall strength of the anchor cable structure while improving its grouting effect. The anchor cable transition rod 5 is used to realize the installation connection between the anchor cable main rod 6 and the connecting main rod 3. The anchor cable main rod 6 serves as the main part of the anchor cable structure and provides installation support for the anchor cable anti-detachment rod 7. The anchor cable anti-detachment rod 7 is used to improve the anti-detachment effect of the anchor cable structure through its planar anchoring structure.

[0022] It also includes grouting holes 8, of which there are three. The three grouting holes 8 are respectively arranged on the side of the anchor cable transition rod 5, the anchor cable main rod 6 and the anchor cable anti-detachment rod 7 and penetrate through the corresponding anchor cable transition rod 5, the anchor cable main rod 6 and the anchor cable anti-detachment rod 7. The grouting holes 8 are used as grouting structures on the side of the anchor cable to ensure the grouting effect of the anchor cable while increasing the bonding area between the cable body and the cement body and the pressure relief effect.

[0023] The anchor transition rod 5 is a straight rod structure. The main anchor rod 6 is composed of several groups of steel strands spirally wound together. The anti-detachment rod 7 has several spaced anti-detachment ridges on its side, and the side of the corresponding grouting hole 8 is a planar structure. The anchor transition rod 5, the main anchor rod 6, and the anti-detachment rod 7 together constitute a segmented anchor structure with a hollow interior. The interior of the segmented anchor structure is connected to the interior of the connecting main rod 3. The straight rod structure of the anchor transition rod 5 ensures the strength of the connection between the main rod module and the connecting module to achieve a smooth transition between the two. The anti-detachment ridges on the side of the anti-detachment rod 7 and the planar structure together constitute a planar anchoring structure to improve the anti-detachment effect of the anchor structure. The hollow interior of the segmented anchor structure meets the grouting requirements of the anchor. The cross-sectional view of the anti-detachment rod 7 and the grouting hole 8 of this utility model is shown below. Figure 3 As shown.

[0024] The inner side of the end of the anchor cable end 1 away from the main module is set as an open structure and the outer side is provided with anti-slip ribs. The open structure is used as a receiving structure on the anchor cable end 1, thereby providing a receiving space for the sealing structure. The anti-slip ribs are used to improve the anti-slip effect of the anchor cable end 1 to facilitate the disassembly and assembly of the anchor cable end 1.

[0025] It also includes a sealing structure, which comprises a sealing ring 9, an anti-jamming ring 10, and anti-jamming protrusions 11. Two sets of sealing rings 9 are arranged side-by-side at intervals inside the end of the anchor cable end 1 furthest from the main module and are sleeved with the connecting threaded rod 2. The anti-jamming ring 10 is positioned between the two sets of sealing rings 9 and fits snugly against them. Two sets of anti-jamming protrusions 11 are also provided, each set consisting of several evenly spaced protrusions arranged around the perimeter. The two sets of anti-jamming protrusions are symmetrically arranged on both sides of the anti-jamming ring 10 and are integrally formed with it. The anti-jamming ring 10 prevents... The locking protrusion 11 is fitted to the sealing ring 9. The sealing structure, through the cooperation of the sealing ring 9, the anti-jamming ring 10, and the anti-jamming protrusion 11, seals the connection between the grouting module and the connecting threaded rod 2. The two sets of sealing rings 9 together form a double sealing structure to seal the connection between the grouting module and the connecting threaded rod 2. The anti-jamming ring 10 prevents the sealing ring 9 from jamming. The anti-jamming protrusion 11 cooperates with the anti-jamming ring 10 to form an anti-jamming structure, thereby preventing the sealing ring 9 from jamming. A cross-sectional view of the sealing structure and the anchor cable end of this utility model is shown below. Figure 4 As shown.

[0026] The grouting module includes a grouting end 12 and a grouting washer 13. The grouting end 12 is located at the end of the connecting threaded rod 2 away from the connecting main rod 3 and is threadedly connected to the connecting threaded rod 2. The end of the grouting end 12 that is threadedly connected to the connecting threaded rod 2 is inserted into the inner side of the anchor cable end 1. The grouting end 12 has a grouting channel inside, and its end away from the anchor cable end 1 is set as a hexagonal nut structure. The grouting washer 13 is disposed between the grouting end 12 and the anchor cable end 1. The grouting module, through the cooperation of the grouting end 12 and the grouting washer 13, constitutes the grouting structure on the anchor cable end 1. The grouting end 12 serves as the main body of the grouting structure and provides a grouting channel for the anchor cable. The grouting washer 13 serves as the mating structure between the grouting end 12 and the anchor cable end 1, improving the assembly accuracy between the grouting module and the anchor cable end 1.

[0027] It also includes a pressure relief hole 14, which is located at the insertion point of the grouting end 12 and the anchor cable end 1 and extends through the grouting end 12. The pressure relief hole 14 is used as a pressure relief structure on the grouting end 12 to relieve the pressure between the anchor cable end 1 and the connecting threaded rod 2.

[0028] Working principle: During underground installation, a borehole is first drilled. Because the steel strand is flexible and the anchor cable body is made of steel strand, the length of the anchor cable is not limited by the height and width of the roadway. Even in narrower roadways, anchors with longer rods can be installed. The anchor cable end 1 and the grouting end 12 are assembled onto the connecting threaded rod 2. The thrust ring 4 limits the anchor cable end 1. The anchor cable structure is then fed into the borehole by a cable feeder. Beforehand, the grouting end 12 is connected to the grouting pump. The grouting pump is started, and it injects grout into the interior of the anchor cable and flows into the borehole through the grouting hole 8, filling the borehole and forming a full anchor structure. This increases the bonding area between the cable body and the cemented body and the pressure relief effect, thereby improving the anchoring effect.

[0029] The beneficial effects of this utility model are that it has a connecting module and a grouting module to form a prefabricated grouting end, which ensures assembly accuracy while facilitating disassembly and maintenance of the end part. It is highly flexible in use. It has a main module and adopts a multi-segment cable structure. Multiple grouting holes are drilled on the side of the cable, which can not only ensure the grouting effect of the anchor cable, but also increase the bonding area and pressure relief effect between the cable and the cemented body, thereby improving the anchoring effect.

[0030] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.

Claims

1. A segmented grouting anchor cable for mining, comprising an anchor cable end (1), said anchor cable end (1) being arranged at one end of the anchor cable structure, characterized in that, It also includes a connecting module for forming a thrust connection structure, a main module for forming a segmented anchor cable structure, and a grouting module for forming an assembled grouting structure. The connecting module is arranged at one end of the anchor cable end (1), the main module is configured at the end of the connecting module away from the anchor cable end (1), and the grouting module is assembled at the end of the anchor cable end (1) away from the connecting module. The connecting module includes a connecting threaded rod (2) and a connecting main rod (3). The connecting threaded rod (2) is disposed inside the connecting end and is threadedly connected to the connecting end. The two ends of the connecting threaded rod (2) protrude from the two ends of the connecting end, and one end is located between the connecting end and the grouting module. The connecting main rod (3) is disposed at the end of the connecting threaded rod (2) away from the grouting module and is integrally formed with the connecting threaded rod (2). The interiors of the connecting threaded rod (2) and the connecting main rod (3) are hollow and interconnected. The main module includes an anchor cable transition rod (5), an anchor cable main rod (6), and an anchor cable anti-detachment rod (7). The anchor cable transition rod (5) is located at the end of the connecting main rod (3) away from the connecting threaded rod (2) and one end of the transition rod is welded to the connecting main rod (3). The anchor cable main rod (6) is located at the end of the anchor cable transition rod (5) away from the connecting main rod (3) and is welded to the anchor cable transition rod (5). The anchor cable anti-detachment rod (7) is located at the end of the anchor cable main rod (6) away from the anchor cable transition rod (5) and is welded to the anchor cable main rod (6). The grouting module includes a grouting end (12) and a grouting washer (13). The grouting end (12) is located at the end of the connecting threaded rod (2) away from the connecting main rod (3) and is threadedly connected to the connecting threaded rod (2). The end of the grouting end (12) that is threadedly connected to the connecting threaded rod (2) is inserted into the inner side of the anchor cable end (1). The grouting end (12) has a grouting channel inside and its end away from the anchor cable end (1) is set as a hexagonal nut structure. The grouting washer (13) is disposed between the grouting end (12) and the anchor cable end (1).

2. The segmented grouting anchor cable for mining as described in claim 1, characterized in that, It also includes a thrust ring (4), which is disposed on the outer middle part of the connecting threaded rod (2) and engaged with the connecting threaded rod (2), and the connecting end abuts against the thrust ring (4).

3. A segmented grouting anchor cable for mining as described in claim 1, characterized in that, It also includes grouting holes (8), three of which are arranged on the side of the anchor cable transition rod (5), the anchor cable main rod (6) and the anchor cable anti-detachment rod (7) respectively and penetrate the corresponding anchor cable transition rod (5), the anchor cable main rod (6) and the anchor cable anti-detachment rod (7).

4. A segmented grouting anchor cable for mining as described in claim 3, characterized in that, The anchor cable transition rod (5) is configured as a straight rod structure. The anchor cable main rod (6) is composed of several groups of steel strands spirally wound together. The side of the anchor cable anti-detachment rod (7) is provided with several anti-detachment convex patterns arranged at intervals, and the side corresponding to the grouting hole (8) is configured as a planar structure. The anchor cable transition rod (5), the anchor cable main rod (6) and the anchor cable anti-detachment rod (7) together constitute a segmented anchor cable structure and its interior is configured as a hollow structure. The interior of the segmented anchor cable structure is connected to the interior of the connecting main rod (3).

5. A segmented grouting anchor cable for mining as described in claim 1, characterized in that, The inner side of the end of the anchor cable (1) away from the main module is set as an open structure and the outer side is provided with anti-slip ribs.

6. A segmented grouting anchor cable for mining as described in claim 1, characterized in that, It also includes a sealing structure, which includes a sealing ring (9), an anti-jamming ring (10), and an anti-jamming protrusion (11). The sealing ring (9) is provided in two sets. The two sets of sealing rings (9) are arranged side by side at intervals inside the end of the anchor cable end (1) away from the main module and are sleeved with the connecting threaded rod (2). The anti-jamming ring (10) is arranged between the two sets of sealing rings (9) and fits against the sealing ring (9). The anti-jamming protrusion (11) is provided in two sets. Each set of anti-jamming protrusions (11) is composed of several protrusions arranged in a uniformly spaced manner. The two sets of anti-jamming protrusions are symmetrically arranged on both sides of the anti-jamming ring (10) and are integrally formed with the anti-jamming ring (10). The anti-jamming ring (10) fits against the sealing ring (9) through the anti-jamming protrusion (11).

7. A segmented grouting anchor cable for mining as described in claim 1, characterized in that, It also includes a pressure relief hole (14), which is located at the insertion point of the grouting end (12) and the anchor cable end (1) and penetrates the grouting end (12).

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