Soft rock fully mechanized coal mining face roadway supporting structure

Abstract

The utility model provides a soft rock fully mechanized coal mining face roadway supporting structure which comprises a mining roadway supporting section, a supporting section and a supporting section. The advance roadway supporting section is used for supporting an advance roadway located in front of a stoping roadway, the advance roadway is provided with a center face, the advance roadway is divided into a stoping side and a non-stoping side by the center face, the advance roadway supporting section comprises a plurality of anchoring sets, and at least one anchoring set is arranged on a top plate, close to the center face, of the stoping side. The rest anchoring groups are distributed on a top plate and a side wall of a non-stoping side at intervals along the circumferential direction of the advance roadway; the mining roadway supporting section and the anchoring set are each at least composed of a plurality of anchor cables. According to the technical scheme, the problem that in the prior art, the supporting effect is poor when a single hydraulic prop is adopted for advance supporting of a machine roadway can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel support, in particular to a tunnel support structure for a soft rock fully mechanized mining working face. Background Art

[0002] The traditional advance support method for the machine lane of the fully mechanized mining working face is single hydraulic prop support, or single hydraulic prop combined with mining I-beam and L-shaped steel beam to strengthen the roof support. This passive support method has the following problems:

[0003] 1. Unable to prevent surrounding rock deformation and gradual delamination in deep areas: Affected by mining, the roof pressure in the advanced range of the machine tunnel of the comprehensive mining working face becomes obvious. When the supporting force of the single hydraulic support is insufficient to support the gravity of the overlying rock strata, the roof surrounding rock gradually delaminates from the surface to the inside.

[0004] 2. Low support strength: Taking DWQ45-150 / 110X light external injection single hydraulic prop as an example, the rated working resistance is 150KN and the rated support pressure is 15.8Mpa. As the burial depth of the comprehensive mining working face increases, the gravity of the overlying rock strata increases, the amount of roof subsidence increases, and the single hydraulic prop is depressurized and deformed.

[0005] 3. Small support area: The contact surface between the head of a single hydraulic support and the roof is the effective support area. When the roof is weak and broken, it cannot effectively support the overall roof within the advance range of the machine tunnel.

[0006] 4. Complex production organization: When the production team advances the working face normally, it is necessary to arrange special personnel to carry out dynamic forward support for the advanced section of the machine tunnel.

[0007] 5. Poor tunnel passability: It occupies the tunnel cross-sectional space, affecting the walking of personnel, the transportation of materials, and the handling of equipment.

[0008] 6. There are many maintenance procedures: dynamically check the integrity of the individual hydraulic supports; dismantle and install the individual hydraulic supports as the working surface progresses. Utility Model Content

[0009] The utility model provides a soft rock fully mechanized mining working face tunnel support structure to solve the problem of poor support effect when single hydraulic props are used for machine tunnel advance support in the prior art.

[0010] In order to solve the above problems, the utility model provides a tunnel support structure for a soft rock comprehensive mining working face, including: a mining tunnel support section, used to support the mining tunnel; an advanced tunnel support section, used to support the advanced tunnel located in front of the mining tunnel, the advanced tunnel has a center plane, and the advanced tunnel is divided into a mining side and a non-mining side by the center plane. The advanced tunnel support section includes multiple groups of anchor groups, at least one group of anchor groups is arranged on the roof of the mining side close to the center plane, and the remaining multiple groups of anchor groups are distributed on the roof and side walls of the non-mining side at intervals along the circumference of the advanced tunnel; the mining tunnel support section and the anchor group are both composed of at least multiple anchor cables.

[0011] Furthermore, the multiple anchoring groups include multiple anchor support groups and multiple mixed support groups. The multiple mixed support groups are distributed on the side walls of the non-mining side and part of the roof on the non-mining side. The multiple anchor support groups are distributed on part of the roof on the non-mining side and the mining side. The anchor cables include advance support anchor cables. The anchor support group consists of advance support anchor cables. The mixed support group consists of W steel belts and advance support anchor cables.

[0012] Furthermore, the mixed support group includes at least two sub-support groups arranged at intervals along the length direction of the advance tunnel, and the sub-support group consists of a W-steel belt and multiple advance support anchor cables. The W-steel belt extends along the length direction of the advance tunnel, and the multiple advance support anchor cables are arranged at intervals at different positions of the W-steel belt.

[0013] Furthermore, multiple groups of sub-support groups are distributed in two rows and three columns, multiple groups of mixed support groups are equidistantly distributed along the circumference of the advance tunnel, and multiple advance support anchor cables in the same sub-support group are equidistantly spaced along the length direction of the advance tunnel.

[0014] Furthermore, multiple anchoring groups are equidistantly distributed along the circumference of the advance tunnel, multiple advance support anchors of multiple anchor support groups are distributed in four rows and three columns, and multiple advance support anchors of the anchor support groups are equidistantly distributed along the length direction of the advance tunnel.

[0015] Furthermore, the advance tunnel support section is supported in the advance tunnel within a range of not less than 30m in front of the mining tunnel.

[0016] Furthermore, the anchor cables also include foundation support anchor cables and reinforcement support anchor cables. The mining tunnel support section is composed of multiple foundation support anchor cables and multiple reinforcement support anchor cables. The mining tunnel support section also includes multiple anchor cable beams. Multiple anchor cable beams, multiple foundation support anchor cables and multiple reinforcement support anchor cables are distributed at intervals along the circumference of the mining tunnel.

[0017] Furthermore, the mining tunnel support section also includes a plurality of grouting pipes, which are arranged at the bottom of the mining tunnel for grouting and preventing the tunnel bottom from arching and bulging.

[0018] Furthermore, the soft rock comprehensive mining working face tunnel support structure also includes a full-anchor shear grouting device, all anchor cables are installed by resin anchoring agents, at least part of the anchor cables are installed with the full-anchor shear grouting device and grouting is performed on the recovery tunnel and / or advance tunnel.

[0019] Furthermore, the anchor cable passes through the full-anchor anti-shear grouting device, which includes a shear-resistant steel pipe, a support plate, a grouting plug, and a lock equipped with a clip. The shear-resistant steel pipe is sleeved on the outer periphery of the anchor cable and one end thereof penetrates into the surrounding rock. The gap between the shear-resistant steel pipe and the anchor cable forms a grouting channel. The support plate and the shear-resistant steel pipe are connected and abut against the surrounding rock. The grouting plug and the lock are respectively arranged on both sides of the support plate. The grouting plug is sleeved on the outer periphery of the shear-resistant steel pipe protruding from the surrounding rock. The clip is used to close the gap between the lock and the anchor cable. The lock has a grouting hole that can be opened and closed, and the grouting hole is connected to the grouting channel.

[0020] By applying the technical solution of the utility model, a tunnel support structure for a soft rock comprehensive mining working face is provided, comprising: a mining tunnel support section, used for supporting the mining tunnel; an advanced tunnel support section, used for supporting an advanced tunnel located in front of the mining tunnel, the advanced tunnel having a center plane, the advanced tunnel being divided into a mining side and a non-mining side by the center plane, the advanced tunnel support section comprising a plurality of anchor groups, at least one anchor group being arranged on the roof of the mining side close to the center plane, and the remaining plurality of anchor groups being distributed on the roof and side walls of the non-mining side at intervals along the circumference of the advanced tunnel; the mining tunnel support section and the anchor group are both composed of at least a plurality of anchor cables.

[0021] By adopting this scheme, the passive support of the machine tunnel in the soft rock comprehensive mining working face is replaced by the active support of anchor cables. Compared with the passive support method of single hydraulic pillars in the prior art, the active support method of anchor cables can combine its own self-protection characteristics and its pre-tightening of the rock formation to prevent the rock mass from separating to the deep layer and increase the friction between the rock formations. At the same time, it can also improve the support force and bearing effect of the overlying rock formation, thereby improving the support effect of the advanced tunnel. In addition, the active support method of anchor cables has a larger support area than the passive support method of single hydraulic pillars. When the roof is weak and broken, it can also effectively support the entire roof within the advanced range of the machine tunnel, further improving the effective support of the advanced tunnel. On the other hand, the active support method of anchor cables does not require the arrangement of special personnel to dynamically move the advanced section of the machine tunnel forward as in the case of single hydraulic pillar support, avoiding the high labor intensity of disassembly and transportation of the support equipment. At the same time, since it does not need to occupy the space in the advanced tunnel, it is conducive to improving the effective utilization of the area in the advanced tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of the support structure of the mining roadway by the mining roadway support section of the soft rock fully mechanized mining working face roadway support structure provided by the embodiment of the utility model is shown;

[0024] Figure 2 Shows Figure 1 Schematic diagram of the support structure of the advanced tunnel of the soft rock fully mechanized mining working face tunnel support structure;

[0025] Figure 3 Shows Figure 2 Schematic diagram of the expansion;

[0026] Figure 4 Shows Figure 1 Structural schematic diagram of the full-anchor shear grouting device of the soft rock fully mechanized mining working face tunnel support structure.

[0027] The above drawings include the following reference numerals:

[0028] 101, mining tunnel; 102, advanced tunnel; 1021, center plane; 1022, mining side; 1023, non-mining side;

[0029] 20. Mining tunnel support section; 21. Grouting pipe; 22. Anchor cable beam;

[0030] 30. Advance tunnel support section; 31. Anchor cable support group; 32. Mixed support group; 321. Sub-support group; 3211. W steel belt;

[0031] 40. Full anchor anti-shear grouting device; 41. Anti-shear steel pipe; 42. Support plate; 43. Grout stopper; 44. Lock; 45. Clip;

[0032] 50. Anchor cable; 51. Advanced support anchor cable; 52. Foundation support anchor cable; 53. Reinforcement support anchor cable;

[0033] 60. Resin anchoring agent. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0035] like Figures 1 to 4 As shown, an embodiment of the utility model provides a soft rock comprehensive mining working face tunnel support structure, including: a mining tunnel support section 20, used to support a mining tunnel 101; an advanced tunnel support section 30, used to support an advanced tunnel 102 located in front of the mining tunnel 101, the advanced tunnel 102 has a center plane 1021, and the advanced tunnel 102 is divided into a mining side 1022 and a non-mining side 1023 by the center plane 1021. The advanced tunnel support section 30 includes a plurality of anchor groups, at least one anchor group is arranged on the roof of the mining side 1022 close to the center plane 1021, and the remaining plurality of anchor groups are distributed on the roof and side walls of the non-mining side 1023 at circumferential intervals along the advanced tunnel 102; the mining tunnel support section 20 and the anchor group are both composed of at least a plurality of anchor cables 50.

[0036] In this embodiment, the passive support of the machine tunnel in the soft rock fully mechanized mining face is replaced by the active support of the anchor cable 50. Compared with the passive support method of the single hydraulic pillar in the prior art, the active support method of the anchor cable 50 can combine its own self-protection characteristics and its pre-tightening of the rock formation to prevent the rock mass from separating to the deep layer and increase the friction between the rock formations. At the same time, it can also improve the support force and bearing effect of the overlying rock formation, thereby improving the support effect of the advanced tunnel 102. In addition, the active support method of the anchor cable 50 has a larger support area than the passive support method of the single hydraulic pillar. When the roof is weak and broken, it can also effectively support the entire roof within the advanced range of the machine tunnel, further improving the effective support of the advanced tunnel 102. On the other hand, the active support method using anchor cables 50 does not require the arrangement of special personnel to dynamically move the advance section of the machine tunnel forward for support, as in the case of single hydraulic support, thereby avoiding the labor-intensive disassembly and transportation of the support equipment. At the same time, since it does not need to occupy the space in the advance tunnel 102, it is beneficial to improve the effective utilization of the area in the advance tunnel 102.

[0037] like Figure 2 and Figure 3 As shown, the multiple anchoring groups include multiple anchor cable support groups 31 and multiple mixed support groups 32. The multiple mixed support groups 32 are distributed on the side walls of the non-mining side 1023 and part of the roof of the non-mining side 1023. The multiple anchor cable support groups 31 are distributed on part of the roof of the non-mining side 1023 and the mining side 1022. The anchor cable 50 includes an advance support anchor cable 51. The anchor cable support group 31 is composed of the advance support anchor cable 51. The mixed support group 32 is composed of a W steel belt 3211 and an advance support anchor cable 51. This arrangement is conducive to ensuring the support effect of the advance tunnel 102 (mainly the non-mining side 1023) and the reliability of the support.

[0038] Specifically, the mixed support group 32 includes at least two sub-support groups 321 spaced apart along the length direction of the advanced roadway 102, the sub-support group 321 is composed of a W steel belt 3211 and a plurality of advanced support anchor cables 51, the W steel belt 3211 extends along the length direction of the advanced roadway 102, and the plurality of advanced support anchor cables 51 are spaced apart at different positions of the W steel belt 3211. Such an arrangement is conducive to further improving the support effect on the non-mining side 1023 (side wall and part of the roof) of the advanced roadway.

[0039] In this embodiment, multiple groups of sub-support groups 321 are distributed in two rows and three columns, multiple groups of mixed support groups 32 are evenly distributed along the circumference of the advance tunnel 102, and multiple advance support anchor cables 51 in the same sub-support group 321 are evenly spaced along the length direction of the advance tunnel 102.

[0040] Such an arrangement is conducive to ensuring the support range and support effect of multiple mixed support groups 32 on the side walls and part of the roof of the advance tunnel 102. The distance between any two adjacent mixed support groups 32 in this embodiment is 1000mm, and the distance between any two adjacent advance support anchor cables 51 in the same sub-support group 321 is 1000mm. It can be understood that the selection of spacing, the number and arrangement of mixed support groups 32, etc. can be adaptively adjusted according to actual conditions, and examples are not given here one by one.

[0041] Furthermore, multiple anchoring groups are equidistantly distributed along the circumference of the advance tunnel 102 , multiple advance support anchors 51 of multiple anchor support groups 31 are distributed in four rows and three columns, and multiple advance support anchors 51 of the anchor support group 31 are equidistantly distributed along the length direction of the advance tunnel 102 .

[0042] Such a configuration is conducive to ensuring the support range and support effect of multiple anchor cable support groups 31 on the roof of the advance tunnel 102. The distance between any two adjacent anchor groups in this embodiment is 1000mm, and the distance between any two adjacent advance support anchor cables 51 in the same anchor cable support group 31 is 1500mm. It can be understood that the selection of spacing, the number and arrangement of anchor cable support groups 31, etc. can be adaptively adjusted according to actual conditions, and examples are not given here one by one.

[0043] Among them, the advance tunnel support section 30 is supported in the advance tunnel 102 within a range of not less than 30m in front of the mining tunnel 101. Such an arrangement is conducive to ensuring the reliability and stability of the advance support.

[0044] like Figure 1As shown, the anchor cable 50 also includes a basic support anchor cable 52 and a reinforcement support anchor cable 53, the mining tunnel support section 20 is composed of a plurality of basic support anchor cables 52 and a plurality of reinforcement support anchor cables 53, and the mining tunnel support section 20 also includes a plurality of anchor cable beams 22, and the plurality of anchor cable beams 22, the plurality of basic support anchor cables 52 and the plurality of reinforcement support anchor cables 53 are distributed at intervals along the circumference of the mining tunnel 101. Such an arrangement is conducive to ensuring the support effect of the mining tunnel 101. On the other hand, the mining tunnel support section 20 also includes a plurality of grouting pipes 21, and the plurality of grouting pipes 21 are arranged at the bottom of the mining tunnel 101 for grouting and preventing the tunnel bottom from arching and bottom bulging. Such an arrangement is conducive to the "strong bottom, solid side, and top control" support of the mining tunnel 101, improves the support effect, realizes the effective control of the surrounding rock of the mining tunnel 101, and ensures the reliability of the support.

[0045] It is understandable that if Figure 1 As shown, different specifications of reinforcing support anchor cables 53 can be selected according to different installation locations. The same is true for the advanced support anchor cables 51. Figure 2 and Figure 3 As shown, different specifications of advance support anchor cables 51 can be selected according to different installation locations.

[0046] In this embodiment, the soft rock fully mechanized mining face tunnel support structure also includes a full anchor shear grouting device 40, all anchor cables 50 are anchored and installed through a resin anchor 60, at least part of the anchor cables 50 are installed with the full anchor shear grouting device 40 and grouting is performed on the mining tunnel 101 and / or the advance tunnel 102. The grouting material is an inorganic composite modified material with a water-cement ratio of 0.8:1-1:1. Through anchoring and grouting, the preload force of the anchor cable 50 can be increased to more than 300KN.

[0047] Such a setting is conducive to the grouting full anchoring of the advance tunnel 102 and the recovery tunnel 101 according to the actual situation, which improves the anchoring force, increases the bearing area of ​​the anchor cable, and further improves the reliability and stability of the support. On the other hand, the support of the recovery tunnel 101 is realized by combining the full-anchor shear grouting device 40 and the recovery tunnel support section 20 such as the basic support anchor cable 52 and the reinforcement support anchor cable 53, which is conducive to the realization of the systematic soft rock tunnel support of the recovery tunnel 101 during the excavation of the recovery tunnel, which is "full-section high-strength prestressed anchor cable basic support + anchor cable truss reinforcement support + shotcrete sealing + grouting full anchoring + anti-bottom arch bottom drum treatment", creating conditions for the active support of the advance construction of the machine tunnel of the soft rock comprehensive mining working face.

[0048] like Figure 4As shown, the anchor cable 50 passes through the full-anchor anti-shear grouting device 40, which includes a shear-resistant steel pipe 41, a support plate 42, a grouting plug 43, and a lock 44 equipped with a clip 45. The shear-resistant steel pipe 41 is sleeved on the outer periphery of the anchor cable 50 and one end thereof penetrates into the surrounding rock. The gap between the shear-resistant steel pipe 41 and the anchor cable 50 forms a grouting channel. The support plate 42 and the shear-resistant steel pipe 41 are connected and abut against the surrounding rock. The grouting plug 43 and the lock 44 are respectively arranged on both sides of the support plate 42. The grouting plug 43 is sleeved on the outer periphery of the shear-resistant steel pipe 41 protruding from the surrounding rock. The clip 45 is used to close the gap between the lock 44 and the anchor cable 50. The lock 44 has a grouting hole that can be opened and closed, and the grouting hole is connected to the grouting channel.

[0049] In this embodiment, the formation of the grouting channel is facilitated by the shear-resistant steel pipe 41, the fastening installation of the full-anchor shear-resistant grouting device 40 and the lock 44 is realized by the support plate 42, and the sealing of the slurry flow path is realized by the grouting plug 43 to prevent the slurry entering the grouting channel from flowing out of the hole of the anchor cable 50. In this way, grouting is realized through the grouting holes and the grouting channels, and the cracks and delamination spaces in the deep part of the top plate and the surrounding rock of the lane are filled and compacted to improve the integrity of the surrounding rock. After the hole of the anchor cable 50 is filled with slurry, full-length anchoring is achieved, the anchoring force is increased, the bearing area of ​​the anchor cable is increased, and the anchoring effect is improved. Among them, the shear-resistant steel pipe 41 is galvanized, and the grouting plug 43 is rubber. After the full-anchor shear-resistant grouting device 40 is installed, the opened grouting hole is connected to the grouting pipeline of the grouting pump, and the full-anchor grouting operation can be carried out by operating the grouting pump.

[0050] In summary, the utility model provides a tunnel support structure for a soft rock comprehensive mining working face. For the mining tunnel 101, it adopts the systematic support technology of "full-section high-strength prestressed anchor basic support + anchor truss reinforced support + shotcrete sealing + grouting full anchor + anti-bottom arch to control bottom drum" during the excavation process, so that the deformation of the surrounding rock of the soft rock tunnel is effectively controlled; on the other hand, the active support of anchor cable 50 is constructed in the advanced range of the machine tunnel of the coal mining working face to replace the passive support of the single hydraulic pillar. Specifically, before the working face is mined, the anchor cable 50 drilling vehicle is operated according to the construction requirements, and four rows and three columns of single-point advance support anchor cables 51 of φ21.8×7300mm are constructed on most of the roof of the non-mining side 1023 and a small part of the roof of the mining side 1022 within a range of not less than 30m ahead of the machine tunnel, with a row spacing of 1000×1500mm. At the same time, two rows and three columns of sub-support groups 321 are constructed on the side walls and a small part of the roof of the non-mining side 1023 of the machine tunnel. The sub-support group 321 is a φ21.8×5300mm advance support anchor cable 51 with a 3-hole W steel belt 3211 with a spacing of 1m. The specification of the W steel belt 3211 is 2400×280×5mm. On the other hand, by installing the full-anchor shear grouting device 40 on the anchored anchor cable 50 and performing pressure grouting, the cracks and delamination spaces deep in the surrounding rock such as the top plate and side walls of the tunnel can be filled and compacted, the passage of fissure water can be blocked, and the integrity of the surrounding rock can be improved. After the holes of the anchor cable 50 are filled with slurry, full-length anchoring is achieved, the anchoring force is improved, and the bearing area of ​​the anchor cable is increased.

[0051] Compared with the prior art method of using a single hydraulic prop for passive support to perform advanced support, the advantages of using anchoring components such as anchor cables 50 for advanced support in this embodiment include:

[0052] 1. Control the deformation and delamination of surrounding rock: Utilize the functions and characteristics of support materials to pre-tighten the rock layer, prevent the rock from delaminating to a deeper level, and increase the friction between rock layers.

[0053] 2. Improve support strength: Use support materials and surrounding rocks to form a support system to improve the bearing capacity of the rock formation.

[0054] 3. Increase the support area: give full play to the role of the combined beams and combined arches of the joint support system of support materials and surrounding rocks, expand the top plate suspension range, and increase the support area.

[0055] 4. Optimize production organization: It is not affected by the labor organization of the team, does not affect the mining production, and arranges the support team separately to flexibly carry out the roof support work within the advance range of the construction machine tunnel in the morning, noon and night shifts.

[0056] 5. Optimize tunnel auxiliary transportation and pedestrian space: change the support method, remove passive support equipment, and ensure that the tunnel section has ample space for transportation and pedestrian safety.

[0057] 6. Reduce maintenance procedures: change the support method, dismantle the passive support equipment, and reduce the maintenance, maintenance, transportation, and support procedures of the passive support equipment.

[0058] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0059] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0060] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0061] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0062] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0063] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A soft rock fully mechanized mining working face tunnel support structure, characterized in that: include: A mining tunnel support section (20) for supporting the mining tunnel (101); An advance tunnel support section (30) is used to support an advance tunnel (102) located in front of the mining tunnel (101), wherein the advance tunnel (102) has a center plane (1021), and the advance tunnel (102) is divided into a mining side (1022) and a non-mining side (1023) by the center plane (1021), and the advance tunnel support section (30) includes a plurality of anchor groups, at least one of which is arranged on a roof of the mining side (1022) close to the center plane (1021), and the remaining plurality of anchor groups are distributed at intervals along the circumference of the advance tunnel (102) on the roof and side walls of the non-mining side (1023); The mining tunnel support section (20) and the anchoring group are both composed of at least a plurality of anchor cables (50).

2. The soft rock fully mechanized mining working face tunnel support structure according to claim 1 is characterized in that: The plurality of anchoring groups include a plurality of anchor cable support groups (31) and a plurality of mixed support groups (32). The plurality of mixed support groups (32) are distributed on the side walls of the non-mining side (1023) and on a portion of the roof of the non-mining side (1023). The plurality of anchor cable support groups (31) are distributed on a portion of the roof of the non-mining side (1023) and on a portion of the roof of the mining side (1022). The anchor cables (50) include advance support anchor cables (51). The anchor cable support group (31) is composed of the advance support anchor cables (51). The mixed support group (32) is composed of a W steel belt (3211) and the advance support anchor cables (51).

3. The soft rock fully mechanized mining working face tunnel support structure according to claim 2 is characterized in that: The mixed support group (32) comprises at least two sub-support groups (321) arranged at intervals along the length direction of the advance tunnel (102); the sub-support group (321) is composed of one W-steel belt (3211) and a plurality of the advance support anchor cables (51); the W-steel belt (3211) extends along the length direction of the advance tunnel (102); and the plurality of the advance support anchor cables (51) are arranged at intervals at different positions of the W-steel belt (3211).

4. The soft rock fully mechanized mining working face tunnel support structure according to claim 3 is characterized in that: The plurality of sub-support groups (321) are distributed in two rows and three columns, the plurality of mixed support groups (32) are distributed equidistantly along the circumference of the advance tunnel (102), and the plurality of advance support anchor cables (51) within the same sub-support group (321) are equidistantly spaced along the length direction of the advance tunnel (102).

5. The soft rock fully mechanized mining working face tunnel support structure according to claim 2 is characterized in that: The plurality of anchoring groups are evenly spaced along the circumference of the advance tunnel (102); the plurality of advance support anchor cables (51) of the plurality of anchor cable support groups (31) are distributed in four rows and three columns; the plurality of advance support anchor cables (51) of the anchor cable support groups (31) are evenly spaced along the length direction of the advance tunnel (102).

6. The soft rock fully mechanized mining face tunnel support structure according to claim 1 is characterized in that: The advanced tunnel support section (30) supports the advanced tunnel (102) within a range of not less than 30 m in front of the mining tunnel (101).

7. The soft rock fully mechanized mining face tunnel support structure according to claim 1 is characterized in that: The anchor cables (50) further include a basic support anchor cable (52) and a reinforcement support anchor cable (53); the mining tunnel support section (20) is composed of a plurality of basic support anchor cables (52) and a plurality of reinforcement support anchor cables (53); the mining tunnel support section (20) further includes a plurality of anchor cable beams (22); the plurality of anchor cable beams (22), the plurality of basic support anchor cables (52) and the plurality of reinforcement support anchor cables (53) are distributed at intervals along the circumference of the mining tunnel (101).

8. The soft rock fully mechanized mining face tunnel support structure according to claim 7 is characterized in that: The mining tunnel support section (20) further comprises a plurality of grouting pipes (21), which are arranged at the bottom of the mining tunnel (101) for grouting and preventing the tunnel bottom from arching and bulging.

9. The soft rock fully mechanized mining working face tunnel support structure according to claim 1 is characterized in that: The soft rock fully mechanized mining working face tunnel support structure further comprises a full-anchor shear grouting device (40), all the anchor cables (50) are anchored and installed by means of a resin anchoring agent (60), at least part of the anchor cables (50) are installed with the full-anchor shear grouting device (40) and grouting is performed on the recovery tunnel (101) and / or the advance tunnel (102).

10. The soft rock fully mechanized mining face tunnel support structure according to claim 9, characterized in that: The anchor cable (50) passes through the full-anchor anti-shear grouting device (40), which comprises a shear-resistant steel pipe (41), a support plate (42), a grouting stopper (43), and a lock (44) equipped with a clip (45). The shear-resistant steel pipe (41) is sleeved on the outer periphery of the anchor cable (50) and one end thereof penetrates into the surrounding rock. The gap between the shear-resistant steel pipe (41) and the anchor cable (50) forms a grouting channel. The support plate (42) The grouting plug (43) and the lock (44) are respectively arranged on both sides of the support plate (42); the grouting plug (43) is sleeved on the outer periphery of the shear-resistant steel pipe (41) protruding from the surrounding rock; the clip (45) is used to close the gap between the lock (44) and the anchor cable (50); the lock (44) has a grouting hole that can be opened and closed, and the grouting hole is connected to the grouting channel.

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