While-drilling grouting anchor cable suitable for extremely broken ore rock condition

Abstract

The utility model provides a grouting-while-drilling anchor cable applicable to extremely broken ore rock conditions, which belongs to the technical field of grouting anchor rods and comprises a flexible drill rod, a hollow sleeve and a steel strand. The end part of the flexible drill rod is connected with a self-adaptive impact drill bit which is used for drilling and forming the surrounding rock; the flexible drill rod is sleeved with the hollow casing pipe in a penetrating mode, and a built-in high-pressure grouting pipe is arranged on the inner wall of the hollow casing pipe; and the steel strand is arranged on the outer wall of the hollow sleeve. The anchor cable can be installed in place in the drilling and forming process, grouting is carried out, cost is saved, and the purpose of rapid supporting can be achieved. On the premise that safety is guaranteed, the anchor cable can achieve rapid supporting, the technology is simple, cost is low, and economic benefits of mines are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grouting anchor rods, and particularly relates to a grouting anchor cable with drilling for extremely broken ore and rock conditions. Background Technique

[0002] Regarding the support status of anchors (rods) and cables for underground support under different ore body occurrence conditions, as well as the different forms and applicable conditions of anchors (rods) and cables, many scholars have studied anchors (rods) and cables applicable to different support conditions, which has greatly improved the safety and economy of underground mine tunneling and stoping. However, there are still some support problems under extremely broken ore and rock conditions. At present, for the vast majority of extremely broken ore and rock conditions, steel support means such as I-beams and U-shaped steel are still selected, which not only has a slow construction progress but also a high cost. For most mines with non-high-value ore bodies, the increase in support costs poses a huge challenge to the economic benefits of mining enterprises and may even determine the survival of mining enterprises.

[0003] The invention patent with the publication number of CN117646644A provides a self-injecting anchoring grouting anchor cable and its anchoring method. The self-injecting anchoring grouting anchor cable includes a slurry-transporting hollow pipe and a steel strand layer. The steel strand layer is multiple steel strands surrounding the outer periphery of the slurry-transporting hollow pipe. An anchoring agent slurry-transporting pipe and a surrounding rock reinforcement grouting slurry-transporting pipe are formed inside the slurry-transporting hollow pipe, and the anchoring agent slurry-transporting pipe realizes self-injecting anchoring. However, this grouting anchor cable can only perform timely grouting and anchoring while installing the anchor cable, which saves the construction process steps to a certain extent. However, it does not fundamentally avoid problems such as low borehole formation rate caused by cave-ins. The process is still to drill a hole first, and then install the anchor cable and grout. During this period, if the conditions are extremely broken, the cost rate of drilling cannot be guaranteed.

[0004] In view of this, it is necessary to study a grouting anchor cable with drilling for extremely broken ore and rock conditions to solve the above technical problems. Content of the Utility Model

[0005] In view of the technical problems in the background technique that when traditional anchor cables face unstable ore and rock conditions with difficult drilling formation and a large cave-in rate, the anchor cables cannot be installed, resulting in only using a combined support of I-beams and wire meshes, causing a large increase in support costs and slow efficiency, etc., the utility model provides a grouting anchor cable with drilling for extremely broken ore and rock conditions, which can install the anchor cable in place during the drilling formation process and grout, saving costs and achieving the purpose of rapid support.

[0006] Based on the above technical purposes, the utility model provides a grouting anchor cable with drilling for extremely broken ore and rock conditions, including a flexible drill pipe, a hollow casing, and steel strands;

[0007] One end of the flexible drill pipe is connected with an adaptive impact drill bit for drilling and forming the surrounding rock.

[0008] The hollow casing is sleeved on the flexible drill pipe, and several groups of built-in high-pressure grouting pipes are arranged on the inner wall.

[0009] The steel strand is arranged on the outer wall of the hollow casing.

[0010] As a further improvement of the utility model, a driving motor is connected to the other end of the flexible drill pipe. Starting the driving motor drives the flexible drill pipe to rotate, so as to drive the adaptive impact drill bit to rotate and drill.

[0011] As a further improvement of the utility model, the maximum outer diameter of the adaptive impact drill bit is larger than the outer diameter of the steel strand; cutting teeth are arranged on the adaptive impact drill bit.

[0012] As a further improvement of the utility model, the adaptive impact drill bit is rotatably connected with the hollow casing.

[0013] As a further improvement of the utility model, a circular ring rotary connector is arranged at the end of the hollow casing, and the bottom of the adaptive impact drill bit is connected with the circular ring rotary connector, so as to realize the rotation of the adaptive impact drill bit driven by the flexible drill pipe while the hollow casing remains relatively stationary.

[0014] As a further improvement of the utility model, the grouting anchor cable with simultaneous drilling applicable to extremely broken ore rock conditions further includes several groups of high-pressure water pipes arranged on the inner wall of the hollow casing; the high-pressure water pipes are arranged in parallel with the flexible drill pipe; a high-pressure water connection part is arranged at the end of the high-pressure water pipe.

[0015] As a further improvement of the utility model, the grouting anchor cable with simultaneous drilling applicable to extremely broken ore rock conditions further includes several groups of external high-pressure grouting pipes arranged outside the steel strand; the external high-pressure grouting pipes and the built-in high-pressure grouting pipes are arranged in parallel, and slurry connection parts are arranged at both ends.

[0016] As a further improvement of the utility model, the hollow casing is a hollow flexible casing, and the inner diameter of the hollow casing is larger than that of the flexible drill pipe, and the two are not in contact with each other.

[0017] As a further improvement of the utility model, plum blossom holes are arranged on both the steel strand and the hollow casing.

[0018] As a further improvement of the utility model, the steel strand circumferentially surrounds the outer wall of the hollow casing and is axially spirally arranged.

[0019] Beneficial effects:

[0020] 1. The grouting anchor cable with drilling provided by the utility model, which is applicable to extremely broken ore and rock conditions, can install the anchor cable in place and grout during the process of drilling formation on the premise of ensuring safety. It can not only achieve rapid support, but also has a simple process and low cost, improving the economic benefits of the mine.

[0021] 2. The grouting anchor cable with drilling provided by the utility model, which is applicable to extremely broken ore and rock conditions, integrates a flexible drill pipe and an adaptive impact drill bit on the structure of a conventional grouting bolt, and adds the design of a high-pressure water pipe. Thus, the functions of drilling, cleaning crushed stones and grouting and anchoring are effectively integrated and combined, making the drilling and grouting and anchoring in one step.

[0022] The above description is only an overview of the technical solution of the utility model. In order to understand the technical means of the utility model more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the utility model more obvious and understandable, the following specific embodiments of the utility model are specifically given. Description of the Drawings

[0023] In order to more clearly illustrate the technical solution of the utility model, the drawings used in the utility model will be briefly introduced below. Obviously, the following described drawings are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative work.

[0024] Figure 1 It is the main view sectional structure schematic diagram of the grouting anchor cable with drilling provided by the embodiment of the utility model, which is applicable to extremely broken ore and rock conditions;

[0025] Figure 2 It is the sectional structure schematic diagram of the grouting anchor cable with drilling provided by the embodiment of the utility model, which is applicable to extremely broken ore and rock conditions.

[0026] Description of the reference numerals:

[0027] 1. Hollow casing; 2. Steel strand; 3. Built-in high-pressure grouting pipe; 4. Flexible drill pipe; 5. High-pressure water pipe; 6. External high-pressure grouting pipe; 7. Adaptive impact drill bit; 8. Borehole; 9. Cutting teeth; 10. Ring rotary connector. Detailed Description of the Embodiment

[0028] The embodiments of the technical solution of the utility model will be described in detail below with reference to the drawings. The following embodiments are only used to illustrate the technical solution of the utility model more clearly, so they are only examples and cannot be used to limit the protection scope of the utility model.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model; the terms "including" and "having" and any variations thereof in the description of the specification and claims of this utility model and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0030] In the description of the embodiments of this utility model, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this utility model, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0031] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this utility model. The phrase does not necessarily refer to the same embodiment when it appears in various places in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the embodiments of this utility model, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0033] In the description of the embodiments of this utility model, the term "a plurality of" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0034] In the description of the embodiments of this utility model, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of this utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of this utility model.

[0035] In the description of the embodiments of the present invention, unless otherwise clearly specified and defined, technical terms such as "installation", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can also be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0036] In order to solve the technical problems existing in the prior art that in the case of unstable ore and rock conditions where traditional anchor cables face difficulties in drilling hole formation and a large hole collapse rate, the anchor cables cannot be installed, resulting in the only option of using a combination support of I-beams and mesh sheets, which causes a significant increase in support costs and slow efficiency, etc., the present invention provides a follow - up grouting anchor cable applicable to extremely broken ore and rock conditions, which can install the anchor cable in place during the process of drilling hole formation and perform grouting, saving costs and achieving the purpose of rapid support.

[0037] Please refer to Figures 1 to 2 As shown, the present invention provides a follow - up grouting anchor cable applicable to extremely broken ore and rock conditions, which is composed of a hollow casing 1, a steel strand 2, a high - pressure water pipe 5, an internal high - pressure grouting pipe 3, an external high - pressure grouting pipe 6, a flexible drill pipe 4, an adaptive impact drill bit 7, etc.

[0038] The end of the flexible drill pipe 4 is connected with an adaptive impact drill bit 7 for drilling hole formation treatment of the surrounding rock.

[0039] In some specific embodiments, the flexible drill pipe 4 and the adaptive impact drill bit 7 are thread - connected, and the other end of the flexible drill pipe 4 is connected with a driving motor (not shown in the figure). Starting the driving motor drives the flexible drill pipe 4 to rotate, so as to drive the adaptive impact drill bit 7 to rotate and drill holes.

[0040] The hollow casing 1 is sleeved on the flexible drill pipe 4, and several groups of internal high - pressure grouting pipes 3 and high - pressure water pipes 5 are arranged on the inner wall. The high - pressure water pipe 5 is arranged parallel to the flexible drill pipe 4; a high - pressure water connection part (not shown in the figure) is arranged at the end of the high - pressure water pipe 5 far from the adaptive impact drill bit 7.

[0041] The hollow casing 1 is a hollow flexible casing, and the inner diameter of the hollow casing 1 is larger than that of the flexible drill pipe 4, and the two are not in contact with each other.

[0042] The steel strand 2 is arranged on the outer wall of the hollow casing 1. The steel strand 2 circumferentially surrounds the outer wall of the hollow casing 1 and is axially helically arranged. Plum blossom holes are arranged on both the steel strand 2 and the hollow casing 1.

[0043] A plurality of groups of external high-pressure grouting pipes 6 are arranged outside the strand 2; the external high-pressure grouting pipes 6 and the internal high-pressure grouting pipes 3 are arranged in parallel, and slurry connection parts (not shown in the figure) are arranged at the ends far away from the adaptive impact bit 7.

[0044] The maximum outer diameter of the adaptive impact bit 7 is greater than the outer diameter of the strand 2, that is, the maximum outer diameter of the adaptive impact bit 7 is set as the maximum outer diameter in the whole grouting anchor cable while drilling. Thus, it is ensured that after the adaptive impact bit 7 finishes drilling, the whole grouting anchor cable while drilling can enter the hole synchronously with the adaptive impact bit 7. Cutting teeth 9 are arranged on the adaptive impact bit 7.

[0045] The adaptive impact bit 7 is rotatably connected to the hollow casing 1.

[0046] In some specific embodiments, a circular ring rotary connector 10 is arranged at the end of the hollow casing 1, and the bottom of the adaptive impact bit 7 is connected to the circular ring rotary connector 10, so as to realize the rotation of the bit driven by the flexible drill pipe while the hollow casing remains relatively stationary.

[0047] The specific operation steps of the grouting anchor cable while drilling applicable to extremely broken ore-rock conditions provided by the present utility model are as follows:

[0048] Connect the end of the flexible drill pipe 4 to the adaptive impact bit 7, and the flexible drill pipe 4 is sleeved outside the hollow casing 1. The inner wall of the hollow casing 1 is symmetrically connected with a high-pressure water pipe 5 and an internal high-pressure grouting pipe 3, and a strand 2 is installed outside the hollow casing 1. The strand 2 is tightly combined with the hollow casing 1, and plum blossom holes are arranged on the strand 2 and the hollow casing 1 for flushing the dust generated during drilling with high-pressure water and high-pressure grouting. Symmetrically arranged external high-pressure grouting pipes 6 are installed in the gaps between the outermost strands 2 and the drill hole 8.

[0049] Start the driving motor to drive the flexible drill pipe 4 to rotate, so as to drive the adaptive impact bit 7 to rotate and drill. Synchronously start the high-pressure water injection process. The high-pressure water in the high-pressure water pipe 5 is used to clean the crushed stones and dust generated by drilling, and the crushed stones and dust are washed to the outside of the drill hole 8. Until the adaptive impact bit 7 drills to the predetermined depth, turn off the driving motor. Then, after cleaning the crushed stones and dust through the high-pressure water pipe 5, start the high-pressure grouting process, and synchronously inject the anchoring slurry through the internal high-pressure grouting pipe 3 and the external high-pressure grouting pipe 6, so that the anchoring slurry fills the internal space of the whole grouting anchor cable while drilling applicable to extremely broken ore-rock conditions and the gaps between the drill hole 8, and tightly anchors and combines the anchor cable with the wall of the drill hole 8 to form a stable anchoring support body.

[0050] In summary, the present utility model provides a grouting anchor cable while drilling applicable to extremely broken ore rock conditions, belonging to the technical field of grouting anchor rods. It includes a flexible drill pipe, a hollow casing, and a steel strand. An adaptive impact bit is connected to the end of the flexible drill pipe for drilling and forming the surrounding rock. The hollow casing sleeves the flexible drill pipe, and an internal high-pressure grouting pipe is arranged on the inner wall. The steel strand is arranged on the outer wall of the hollow casing. The present utility model can install the anchor cable in place during the process of drilling and forming, and perform grouting, which not only saves costs but also achieves the purpose of rapid support. On the premise of ensuring safety, this anchor cable can not only achieve rapid support, but also has a simple process and low cost, improving the economic benefits of the mine.

[0051] It should be noted that the present utility model is not limited to the above embodiments. The above embodiments are only examples, and embodiments with the same structure and the same effect as the technical idea within the technical solution scope of the present utility model are all included in the technical scope of the present utility model. In addition, within the scope not departing from the gist of the present utility model, various deformations that those skilled in the art can think of applied to the embodiments, and other ways constructed by combining some constituent elements in the embodiments are also included in the scope of the present utility model.

Claims

1. A grouting anchor cable while drilling applicable to extremely broken ore and rock conditions, characterized in that, It includes a flexible drill pipe, a hollow casing, and a steel strand; An adaptive impact bit is connected to the end of the flexible drill pipe for drilling and shaping the surrounding rock; The hollow casing is sleeved on the flexible drill pipe, and several groups of built-in high-pressure grouting pipes are arranged on the inner wall; The steel strand is arranged on the outer wall of the hollow casing.

2. The grouting anchor cable while drilling applicable to extremely broken ore and rock conditions according to claim 1, wherein A driving motor is connected to the other end of the flexible drill pipe. Starting the driving motor drives the flexible drill pipe to rotate, so as to drive the adaptive impact bit to rotate and drill.

3. The grouting anchor cable while drilling according to claim 1, which is applicable to the condition of extremely broken ore and rock, is characterized in that The maximum outer diameter of the adaptive impact bit is greater than the outer diameter of the steel strand; cutting teeth are arranged on the adaptive impact bit.

4. The grouting anchor cable while drilling applicable to extremely broken ore and rock conditions according to claim 1, wherein, The adaptive impact bit is rotatably connected to the hollow casing.

5. The grouting anchor cable while drilling applicable to extremely broken ore and rock conditions according to claim 4, characterized in that, A circular rotary connector is arranged at the end of the hollow casing; the bottom of the adaptive impact bit is connected to the circular rotary connector to realize the rotation of the adaptive impact bit driven by the flexible drill pipe while the hollow casing remains relatively stationary.

6. The grouting anchor cable while drilling applicable to extremely broken ore and rock conditions according to claim 1, characterized in that, The grouting anchor cable with simultaneous drilling applicable to extremely broken ore-rock conditions further includes several groups of high-pressure water pipes arranged on the inner wall of the hollow casing; the high-pressure water pipes are arranged parallel to the flexible drill pipe; a high-pressure water connection part is arranged at the end of the high-pressure water pipe.

7. A grouting anchor cable while drilling applicable to extremely broken ore and rock conditions according to claim 1, characterized in that, The grouting anchor cable with simultaneous drilling applicable to extremely broken ore-rock conditions further includes several groups of external high-pressure grouting pipes arranged outside the steel strand; the external high-pressure grouting pipes and the built-in high-pressure grouting pipes are arranged parallel to each other, and slurry connection parts are arranged at their ends.

8. A grouting anchor cable while drilling applicable to extremely broken ore and rock conditions according to claim 1, characterized in that The hollow casing is a hollow flexible casing, and the inner diameter of the hollow casing is greater than that of the flexible drill pipe, and the two are not in contact with each other.

9. A grouting anchor cable while drilling applicable to extremely broken ore and rock conditions according to claim 1, characterized in that, Plum blossom holes are arranged on both the steel strand and the hollow casing.

10. The grouting anchor cable while drilling according to claim 1, which is applicable to the extremely fragmented ore and rock conditions, is characterized in that The steel strand circumferentially surrounds the outer wall of the hollow casing and is arranged in an axial spiral.

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