An interactive sliding drag shield supporting device and a construction method of an anchor rod support

Abstract

The application discloses an interactive sliding shield supporting device and an anchor rod supporting construction method, and belongs to the technical field of tunnel construction. The front shield is arranged at one end close to a tunnel face, the front shield, the sliding shield and the rear shield frame can independently move along the tunnel advancing direction, and the front shield and the sliding shield are synchronously lifted and lowered. Through the alternate movement of the front shield and the sliding shield, the shield strip and the sliding shield strip are driven to move in groups, an anchoring area is formed between two adjacent shield strips or two adjacent sliding shield strips, the anchoring net is fixed with the tunnel roof through the anchoring area and permanent support is formed, meanwhile, the shield strip and the sliding shield strip form temporary support for the exposed rock mass formed by real-time excavation in the process of alternate movement, seamless connection transition of the temporary support and the permanent support is realized, continuous non-empty roof support is formed, and construction efficiency and tunneling safety are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of excavation and support of underground engineering using anchor net technology, in particular to an interactive sliding drag shield support device and anchor rod support construction method. BACKGROUND

[0002] In the process of excavation construction in sedimentary rock strata, the surrounding rock mass is prone to fall off during the stress release process, which poses a threat to construction. Therefore, in order to ensure safety, temporary support needs to be carried out after the rock mass is excavated, and then permanent support construction is carried out under the protection of temporary support. There are two existing temporary supports: one is to immediately support the exposed surrounding rock mass with temporary support after the surrounding rock mass is exposed in the excavation engineering. This form can provide timely support to prevent the surrounding rock from falling off during the stress distribution process of the surrounding rock. However, the problem is that the temporary support needs to be removed before anchor rod support construction and then temporarily supported again after the net is laid. This repeated operation on the surface of the surrounding rock has safety factors. The other situation is that when the newly exposed surrounding rock is temporarily supported, the anchor net is set on the temporary support bracket, and the anchor net is also pressed onto the surrounding rock at the same time as the temporary support is set up, so as to carry out anchor rod support construction. The problem with this latter support method is that the exposed surrounding rock cannot be temporarily supported in the shortest time, which can easily cause the surrounding rock to fall off and affect safety production.

[0003] Temporary support has always been a difficult problem in geotechnical construction. Although there are many methods to solve temporary support, there is no completely empty roof support device and method for anchor net support. The first situation described above can provide timely protection for the surrounding rock, but the temporary support needs to be temporarily removed before anchor rod support operation and the net needs to be placed on the temporary support. This can easily cause the surrounding rock to fall off and affect safety, and can also delay the construction operation time. The second situation has the safety hazard of laying the net during temporary support.

[0004] Coal mine tunnels are basically in sedimentary rock mass, and the existing temporary support is set up after the rock is broken by the excavation machine, using the stability of the surrounding rock for a period of time. Mechanized advance support includes step support, track support, on-board support, and attached rock support. This type of support is used to support the newly excavated rock surface after the rock breaking process is completed. There are also many on-site implementations that do not perform temporary support, mainly because the temporary support installation process is complex and time-consuming, and there are safety factors in performing temporary support. Using the temporary stability of the surrounding rock after excavation to perform temporary support will inevitably have some safety hazards and construction complexity, and cannot be well promoted.

[0005] No matter the artificial erection of temporary support bracket or the mechanical construction of temporary support, the principle is to use the self-stability time of the surrounding rock after excavation to complete the temporary support. This construction cannot achieve the essential safety construction, and the reason is that the self-stability of the surrounding rock is directly related to the geological characteristics and engineering characteristics of the surrounding rock. These geological factors and engineering factors are changing, and even in the same area, the surrounding rock of different regions is not consistent. Therefore, the key technology of geotechnical construction is to pursue no empty top at any time.

[0006] In geotechnical construction, a kind of shield machine or TBM construction with timely temporary support can support in time after breaking rock during tunneling, which can achieve the requirement of protection in a very short time. However, the shield of this kind of equipment can further reinforce the surrounding rock by supporting and extruding the surrounding rock in the particularly weak clay layer, which is more suitable for the next permanent support construction. However, for the sedimentary rock surrounding rock, the strong support of the shield further damages the surrounding rock while providing temporary support, making it very difficult to transition from temporary support to permanent support. Especially for the anchor net support roadway, it is impossible to lay the net before the shield provides temporary support, and all the shield equipment construction is carried out after the shield. Therefore, the current equipment needs to expose the surrounding rock again for the second time after the shield to lay the net. This can easily cause the surrounding rock to further separate and cause safety hazards. SUMMARY

[0007] In view of the problems in the prior art, the present application provides an interactive sliding shield support device and an anchor rod support construction method. The shield is kept in a supporting state from the beginning of the exposure of the surrounding rock body after breaking rock during tunneling to the completion of anchor rod support construction. The sliding shield supports the anchor point position and exposes the anchor point during the sliding of the shield to perform anchor construction. The net laying work is completed under the protection of the shield strip and the sliding shield plate. The entire anchor net construction process can be completely free of empty top, and the essential safety construction of the tunneling operation is realized.

[0008] The present application is realized by the following technical solutions:

[0009] An interactive sliding shield support device, comprising a front shield, a sliding shield and a rear shield frame arranged in sequence along the tunneling direction, the front shield being located at one end close to the tunnel face, the front shield, the sliding shield and the rear shield frame being capable of moving independently along the tunneling direction, and the front shield and the sliding shield being capable of nested sliding and synchronous lifting.

[0010] The front trailing shield is provided with a plurality of shield strips near one side of the sliding shield, the plurality of shield strips are arranged at intervals along the width of the roadway, the sliding shield is provided with a plurality of sliding shield strips near one side of the rear shield frame, the plurality of sliding shield strips are arranged at intervals along the width of the roadway, the plurality of shield strips pass through the front trailing shield and the rear ends of the plurality of shield strips are mixed with the plurality of sliding shield strips, and the sliding shield strips and the shield strips are arranged alternately along the width direction of the roadway, and the rear shield frame is located below the shield strips and the sliding shield strips.

[0011] When the roof of the roadway is anchored and supported, the rear shield frame is used to fix the anchoring net to the bottom of the shield strips and the sliding shield strips, and the front trailing shield and the sliding shield are alternately moved along the advancing direction, and the anchoring operation is performed when the anchoring point of the roof design is exposed.

[0012] Preferably, the front trailing shield comprises a trailing shield body and a trailing shield support;

[0013] The trailing shield body is arranged at the top of the trailing shield support, the lower end of the trailing shield support is provided with a moving device, a plurality of shield strips are detachably mounted on the trailing shield body, the plurality of shield strips are arranged at intervals along the width direction of the roadway, and the distance between adjacent two shield strips is greater than or equal to the width of the sliding shield strip.

[0014] Preferably, the front trailing shield is a sliding cavity with an open front end, and an advanced telescopic roof is arranged in the sliding cavity, and the advanced telescopic roof can be extended along the advancing direction of the roadway.

[0015] Preferably, the sliding shield comprises a sliding shield body and a sliding shield support;

[0016] The sliding shield body is arranged at the top of the sliding shield support, the lower end of the sliding shield support is provided with a moving device, a plurality of sliding shield strips are detachably mounted on the sliding shield body, and the plurality of sliding shield strips are arranged at intervals along the width direction of the roadway, the sliding shield body is provided with a plurality of sliding grooves near one side of the rear shield frame, the plurality of sliding grooves and the plurality of sliding shield strips are arranged alternately along the width of the roadway, and the trailing shield strip passes through the sliding cavity and the sliding groove and extends into between the adjacent two sliding shield strips.

[0017] Preferably, the sliding shield body is internally provided with a sliding cavity, and the trailing shield body can be nested into the sliding cavity.

[0018] Preferably, the rear shield frame comprises a shield frame body and a rear shield support arranged at the bottom of the shield frame body, the lower end of the rear shield support is provided with a moving device, and the top of the shield frame body is used to fix the anchoring net.

[0019] Preferably, the rear shield frame is further provided with a telescopic shield, and the telescopic shield can be extended or retracted along the advancing direction.

[0020] Preferably, the end of the telescopic shield is hingedly provided with a folding shield.

[0021] Preferably, the end of the rear shield frame is hingedly provided with a folding shield.

[0022] A construction method of an interactive sliding drag shield supporting device, comprising the following steps:

[0023] Step 1: When the working face is excavated, the front drag shield moves to temporarily support the roof of the roadway formed by the current working step;

[0024] Step 2: The anchor net is laid at the bottom of the shield strip and the sliding shield strip, and the rear shield frame is lifted to the bottom of the shield strip and the sliding shield strip;

[0025] Step 3: The support force of the sliding shield and the roof of the roadway is adjusted to a zero contact state, and the sliding shield is moved along the excavation direction by one working step and is nested with the front drag shield, and the anchor point position is exposed after the sliding shield moves forward;

[0026] Step 4: The anchor rod or anchor cable is constructed at the anchor point position to form permanent support for the roof of the roadway and complete the anchoring process;

[0027] Step 5: Steps 1-4 are repeated until the roadway excavation task is completed.

[0028] Compared with the prior art, the present application has the following beneficial technical effects:

[0029] The interactive sliding drag shield supporting device provided by the present application divides the existing shield plate into multiple shield strips and sliding shield strips, and installs them on the front drag shield and the sliding shield respectively, and alternately arranges the shield strips and the sliding shield strips along the width direction of the roadway to form the entire shield plate. When supporting the roof of the roadway, the rear shield frame is moved to the bottom of the shield strip and the sliding shield strip, the anchor net is laid on the rear shield frame and is lifted to the bottom surface of the shield strip and the sliding shield strip, the shield strip and the sliding shield strip are moved in groups by the alternating movement of the front drag shield and the sliding shield, the anchor net is fixed to the roof of the roadway through the anchor area between the adjacent two shield strips or the adjacent two sliding shield strips to form permanent support, and the shield strip and the sliding shield strip form temporary support for the exposed rock mass formed by real-time excavation during the alternating movement, realizing seamless connection and transition of temporary support and permanent support and realizing the safety of the excavation operation. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the interactive sliding drag shield device of the present application;

[0031] Figure 2 It is an exploded view of the interactive sliding drag shield device of the present application;

[0032] Figure 3 It is a structural schematic diagram of the front drag shield of the present application;

[0033] Figure 4 It is a structural schematic diagram of the sliding shield of the present application;

[0034] Figure 5 Structure diagram of rear shield frame of the present application;

[0035] Figure 6 Structure diagram of rear shield frame with telescopic frame of the present application;

[0036] Figure 7 Structure diagram of rear shield frame with folding shield of the present application;

[0037] Figure 8 Structure diagram of rear shield frame with telescopic frame and folding shield of the present application;

[0038] Figure 9 Structure diagram of mobile device and rear shield frame of the present application;

[0039] Figure 10 Structure diagram of sliding shield with folding shield of the present application;

[0040] Figure 11 Structure diagram of interactive sliding and trailing shield device with telescopic frame and folding shield of the present application;

[0041] Figure 12 Structure diagram of interactive sliding and trailing shield device with folding shield installed on sliding shield of the present application;

[0042] Figure 13 Structure diagram of arc-shaped rear shield frame of the present application;

[0043] Figure 14 Structure diagram of arc-shaped front trailing shield of the present application;

[0044] Figure 15 Structure diagram of arc-shaped interactive sliding and trailing shield device of the present application;

[0045] Figure 16 Schematic diagram of arc-shaped interactive sliding and trailing shield device installed on tunnel boring machine of the present application;

[0046] Figure 17 Schematic diagram of interactive sliding and trailing shield device installed on boring machine of the present application;

[0047] Figure 18 Construction flow chart of interactive sliding and trailing shield device of the present application.

[0048] Fig. The front trailing shield 1, the sliding shield 2, the rear shield frame 3, the telescopic shield 4, the folding shield 5, the moving device 6, the TBM driving device 8, the trailing shield body 11, the telescopic roof 12, the shield strip 13, the trailing shield support 14, the sliding shield body 21, the sliding shield strip 22, the sliding shield support 23, the strike beam 31, the transverse beam 32, the rear shield support 33, the interactive sliding trailing shield device 100, the main machine body 300, the power transfer machine 400, the shovel plate conveyor 500, and the cutting part 600. DETAILED DESCRIPTION

[0049] The present application will be further described in conjunction with the accompanying drawings, which are explanatory rather than limiting of the present application.

[0050] Example 1

[0051] Reference Figures 1-16 An interactive sliding trailing shield support device includes a front trailing shield 1, a sliding shield 2, and a rear shield frame 3 arranged in sequence along the direction of tunneling. The front trailing shield 1 is located near one end of the tunnel face. The front trailing shield 1, the sliding shield 2, and the rear shield frame 3 can independently move along the direction of tunneling, and the front trailing shield 1 and the sliding shield 2 are synchronized to rise and fall.

[0052] The front trailing shield 1 is provided with a plurality of shield strips 13 on the side close to the sliding shield. The plurality of shield strips 13 are arranged along the width of the tunnel at intervals. The sliding shield 2 is provided with a plurality of sliding shield strips 22 on the side close to the rear shield frame 3. The plurality of sliding shield strips 22 are arranged along the width of the tunnel at intervals. The plurality of shield strips 13 pass through the front trailing shield 1 and are complementarily and alternately arranged with the plurality of sliding shield strips 22.

[0053] When supporting the tunnel roof, the rear shield frame 3 is used to fix the anchor net to the bottom of the shield strips 13 and the sliding shield strips 22. The front trailing shield 1 and the sliding shield 2 are alternately moved along the direction of tunneling.

[0054] The interactive sliding trailing shield device creatively divides the shield plate into a plurality of shield strips and sliding shield strips, and respectively installs them on the front trailing shield 1 and the sliding shield 2. At the same time, the shield strips 13 and the sliding shield strips 22 are alternately arranged along the width direction of the tunnel to form the entire shield plate. When supporting the tunnel roof, the rear shield frame 3 is moved to the lower part of the shield strips 13 and the sliding shield strips 22. The anchor net is laid on the rear shield frame and is jacked up to the bottom surface of the shield strips 13 and the sliding shield strips 22. Through the alternative movement of the front trailing shield 1 and the sliding shield 2, the shield strips 13 and the sliding shield strips 22 are driven to move in groups. The anchor area is formed between two adjacent shield strips or two adjacent sliding shield strips. The anchor net is fixed to the tunnel roof through the anchor area and forms permanent support. At the same time, the shield strips 13 and the sliding shield strips 22 form temporary support for the exposed rock mass formed by real-time excavation in the process of alternative movement, realize seamless connection and transition of temporary support and permanent support, and realize the safety of tunneling operation.

[0055] Referring to Figure 3 , the front shield 1 comprises a shield body 11 and a shield support 14, the shield body 11 is rectangular in structure, the shield body 11 is horizontally arranged at the top of the shield support 14, the lower end of the shield support 14 is provided with a moving device, a plurality of shield strips are detachably arranged on one side of the shield body 11 close to the sliding shield 2, the plurality of shield strips are arranged at intervals along the width direction of the roadway, and the distance between the adjacent two shield strips 13 is the width of the sliding shield strip 22.

[0056] The shield support 14 comprises two telescopic legs, the two telescopic legs are arranged on both sides of the shield body 11 and located on the side close to the roadway face, the shield body is raised or lowered through the telescopic legs, the telescopic leg comprises an inner leg and an outer leg which are sleeved with each other, the lower end of the outer leg is connected with the base, the base is arranged on the moving device, the hydraulic drive device is arranged in the base, the lower end of the inner leg is connected with the hydraulic drive device, and the upper end of the inner leg is connected with the shield body 11.

[0057] The moving device is preferably a tracked moving device.

[0058] Referring to Figure 4 , the sliding shield 2 comprises a sliding shield body 21 and a sliding shield support 23, the sliding shield body 21 is rectangular in structure, and a sliding cavity is arranged in the sliding shield body 21, when the sliding shield moves forward, the end of the shield body 11 close to the sliding shield is located in the sliding cavity, it can also be understood that the outer shape of the shield body is the same as the structure of the sliding cavity, and the shield body can be sleeved in the sliding cavity; the sliding shield body 21 is horizontally arranged at the top of the sliding shield support 23, the lower end of the sliding shield support 23 is provided with a moving device, a plurality of sliding shield strips 22 are detachably arranged on one side of the sliding shield body 21 close to the rear shield 3, the plurality of sliding shield strips 22 are arranged at intervals along the width direction of the roadway, the side of the sliding shield body 21 close to the rear shield is provided with a plurality of sliding grooves which are communicated with the sliding cavity, the plurality of sliding grooves and the plurality of sliding shield strips are arranged at intervals along the width of the roadway, the shield strip 13 passes through the sliding cavity and the sliding groove and extends into between the adjacent two sliding shield strips 22.

[0059] The sliding shield support 23 comprises two telescopic legs, which have the same structure as the shield support 14 and will not be described again.

[0060] The detachable mounting mode of the shield strip 13 and the sliding shield strip 22 is the same, for example, the end of the shield strip 13 is fixed on the edge of the shield body through bolts, the shield strip 13 and the sliding shield strip 22 are provided with a plurality of anchor holes, when the rock mass of the roadway roof is very broken, the shield strip 13 and the sliding shield strip 22 are directly fixed on the roadway roof through anchor rods, then the shield strip 13 and the sliding shield strip 22 are separated from the shield body 11 and the sliding shield body 21, so that the shield strip 13 and the sliding shield strip 22 form permanent support for the roadway.

[0061] Referring to Figure 5and 9 The rear shield frame 3 comprises a shield body and a rear shield support 33 arranged at the bottom of the shield body, the lower end of the rear shield support 33 is provided with the moving device 6, the rear shield support 33 comprises a plurality of telescopic legs arranged in a rectangular distribution, the shield body is raised or lowered through the telescopic legs, and the anchor net is used for being laid on the top of the shield body.

[0062] The shield body comprises two transverse beams 32 arranged at intervals, the axial direction of the transverse beams 32 is perpendicular to the axial direction of the tunnel excavation direction, and a plurality of strike beams 31 are arranged on the two transverse beams 32 and arranged at intervals along the excavation direction.

[0063] The above-mentioned trailing shield support 14, the sliding shield support 23 and the rear shield support 33 are all telescopic legs.

[0064] Referring to Figure 18 The construction method of the seamless joint interactive sliding trailing shield device is described in detail below, including the following steps.

[0065] Step 1, the front trailing shield 1 moves synchronously with the tunneling device to form temporary support for the tunnel roof formed by the current construction step.

[0066] The front trailing shield 1 moves synchronously with the tunneling machine head of the tunneling device, the front trailing shield has zero support force and follows the cutting surface in real time, and when the tunneling rock is broken by one construction step, a supporting force of 5kN is applied to support the tunnel roof to form temporary support.

[0067] Step 2, the anchor net is laid at the bottom of the trailing shield strip 13 and the sliding shield strip 22 and supported by the rear shield frame 3.

[0068] Specifically, the rear shield frame 3 is lowered and moved forward by one construction step as a whole, so that the rear shield frame 3 is located at the bottom of the trailing shield strip 13 and the sliding shield strip 22, the anchor net is laid on the rear shield frame and is jacked up to the bottom of the trailing shield strip 13 and the sliding shield strip 22.

[0069] Alternatively, the anchor net is erected at the bottom of the trailing shield strip 13 and the sliding shield strip 22, then the rear shield frame 3 is lowered and moved forward to the bottom of the anchor net, and the support of the anchor net is completed by jacking up through the rear shield frame 3.

[0070] Step 3, the support force of the sliding shield to the tunnel roof is adjusted to zero contact state, and the sliding shield is moved by one construction step along the tunneling direction and nested with the front trailing shield, and after the sliding shield is moved forward to expose the anchor point position, the anchor net is constructed by anchor rods to form permanent support for the tunnel roof.

[0071] When the surrounding rock is particularly broken, the anchor rod is inserted into the reserved anchor hole on the trailing shield strip 13 or / and the sliding shield strip 22, and the trailing shield strip 13 is separated from the trailing shield body 11, or / and the sliding shield strip 22 is separated from the sliding shield body 21.

[0072] Step 4, repeat steps 1-3 until the tunnel excavation task is completed.

[0073] Embodiment 2

[0074] This embodiment 2 is a further optimization of the structure of the interactive sliding shield device of embodiment 1, which mainly optimizes the structure of the front shield 1, and the rest of the structure remains unchanged, as follows:

[0075] The sliding cavity with an open front end in the front shield 1, the front end being close to one end of the tunnel face, the sliding cavity is provided with an advance telescopic roof 12, which can be extended in the direction of tunnel excavation, the front shield 1 is provided with a hydraulic cylinder, the piston rod of the hydraulic cylinder is connected with the end of the advance telescopic roof 12, and the advance telescopic roof 12 is extended or retracted through the hydraulic cylinder.

[0076] When the rock wall of the tunnel roof is poor after excavation, the advance telescopic roof 12 is extended to the edge of the cutting surface through the hydraulic cylinder, and moves synchronously with the excavation cutting device, the advance telescopic roof 104 advances synchronously when the front shield 1 remains in place, realizing complete temporary support without empty roof, and then supporting construction according to the construction method of embodiment 1 above.

[0077] Embodiment 3

[0078] This embodiment 3 is a further optimization of the structure of the interactive sliding shield device of embodiment 1 or embodiment 2, which mainly optimizes the structure of the rear shield frame 3, and the rest of the structure remains unchanged, as follows:

[0079] Referring to Figure 6 , the rear shield frame 3 is also provided with a telescopic shield 4, which can expand the area of the rear shield frame and increase the area of the first net when the state of the roof rock mass formed after excavation is relatively stable.

[0080] The telescopic shield 4 includes a plurality of telescopic shield strike beams, the strike beams 31 of the above rear shield frame 3 are hollow beams, a plurality of telescopic shield strike beams are arranged in the plurality of hollow beams, one end of the plurality of telescopic shield strike beams is located outside the hollow beam, and the plurality of telescopic rods are formed as a whole through the connection of the telescopic shield transverse beams.

[0081] The telescopic shield is connected with a driving device, which is a hydraulic cylinder, the hydraulic cylinder is fixed on the shield body of the rear shield frame 3, the piston rod of the hydraulic cylinder is connected with the telescopic shield transverse beam, and the telescopic shield is extended or retracted through the movement of the piston rod.

[0082] The construction method of the interactive sliding shield device with telescopic shield will be described in detail below, including the following steps:

[0083] Step 1, the front shield moves synchronously with the tunneling device, and the roof of the tunnel formed by the current working step is temporarily supported.

[0084] Step 2, anchor nets are laid at the bottom of the shield belt 13 and the sliding shield belt 22, and are supported by the rear shield frame.

[0085] Step 3, the support force between the sliding shield and the roof of the tunnel is adjusted to a zero contact state, the sliding shield is moved in the tunneling direction by one working step, and is nested with the front shield 1, the anchor point position is exposed after the sliding shield 2 moves forward, the anchor net is constructed with anchor rods, and the roof of the tunnel is permanently supported.

[0086] Step 4, the next working step is excavated, the front shield 1 moves synchronously with the tunneling device, and the roof of the tunnel formed by the current working step is temporarily supported.

[0087] Step 5, the rear shield frame is lowered and the telescopic shield is extended to the bottom of the shield belt 13 and the sliding shield belt 22, the anchor net is laid on the telescopic shield 4, and then the rear shield frame is jacked up.

[0088] Step 6, the support force between the sliding shield 2 and the roof of the tunnel is adjusted to a zero contact state, the sliding shield 2 is moved in the tunneling direction by one working step, and is nested with the front shield 1, the anchor point position is exposed after the sliding shield 2 moves forward, the anchor net is constructed with anchor rods, and the roof of the tunnel is permanently supported.

[0089] Step 7, repeat steps 1-6 until the tunneling task is completed.

[0090] The construction method of this embodiment is different from that of embodiment 1, the combination of the rear shield frame 3 and the telescopic shield 4 can simultaneously complete the permanent support of the roof of the tunnel formed by two working steps, improve the construction efficiency, and improve the safety of tunneling.

[0091] Embodiment 4

[0092] This embodiment 4 is a further optimization of the structure of the interactive sliding shield device of embodiment 1 or embodiment 2, which mainly optimizes the structure of the rear shield frame 3, and the rest of the structure remains unchanged, as follows:

[0093] Referring to Figure 7 , the end of the rear shield frame 3 is provided with a folding shield 5, which is located on the side close to the sliding shield 2, one end of the folding shield 5 is hinged to the end of the running beam 31 of the rear shield frame 3, and the other end is a free end, the folding shield 5 is connected with the rear shield frame 3 through an oblique driving device, the oblique driving device is used to drive the folding shield 5 to rotate along the hinged end, and the folding shield is in a vertical state in the folded state, and is in a horizontal state when laying the net.

[0094] The folding shield 5 comprises a plurality of longitudinal rods, one end of each longitudinal rod is hinged to the end of the running beam of the rear shield frame 3, the other end of the plurality of longitudinal rods is connected through a cross rod, the gap between two longitudinal rods forms an anchoring channel, and the anchor rod is fixed through the anchoring channel to the anchoring net laid on the folding shield 5.

[0095] The oblique driving device is a hydraulic push rod, one end of the hydraulic push rod is connected with the bottom of the shield body, the piston end of the hydraulic push rod is hinged to the folding shield 5, in the permanent support of the roadway roof, the push rod is extended to rotate the folding shield to the horizontal state, and then the rear shield frame 3 is jacked up after the anchoring net is laid thereon, and then the permanent support of the roadway roof is completed.

[0096] The construction method of the interactive sliding shield device with the folding shield 5 will be described in detail below, including the following steps:

[0097] Step 1, the front trailing shield 1 moves synchronously with the tunneling device to temporarily support the roadway roof formed by the current working step.

[0098] Step 2, the anchoring net is laid at the bottom of the shield strip 13 and the sliding shield strip 22 and supported by the rear shield frame 3.

[0099] Step 3, the support force of the sliding shield 2 and the roadway roof is adjusted to zero contact state, and the sliding shield is moved along the tunneling direction by one working step and nested with the front trailing shield 1, and after the sliding shield 2 is moved forward to expose the anchoring point position, the anchor rod is constructed on the anchoring net to form the permanent support of the roadway roof.

[0100] Step 4, the next working step is excavated, the front trailing shield 1 moves synchronously with the tunneling device to temporarily support the roadway roof formed by the current working step.

[0101] Step 5, the anchoring net is laid on the folding shield 5, the folding shield 5 is rotated to the horizontal state through the push rod, and is located at the bottom of the shield strip 13 and the sliding shield strip 22, and at the same time the folding shield 5 applies a certain pressure to the roadway roof.

[0102] Step 6, the support force of the sliding shield 2 and the roadway roof is adjusted to zero contact state, and the sliding shield 2 is moved along the tunneling direction by one working step and nested with the front trailing shield 1, and after the sliding shield 2 is moved forward to expose the anchoring point position, the anchor rod is constructed on the anchoring net to form the permanent support of the roadway roof.

[0103] Step 7, repeat steps 1-6 until the tunneling task is completed.

[0104] The construction method of the embodiment is different from that of the embodiment 1, the combination of the rear shield frame 3 and the folding shield 5 can complete the permanent support of the roadway roof of two working steps at the same time, form continuous no-empty-roof support, improve the construction efficiency, and improve the safety of tunneling.

[0105] Embodiment 5

[0106] This embodiment 5 is a further optimization of the structure of the interactive sliding shield device of embodiment 3, which mainly optimizes the structure of the rear shield frame 3, installs a folding shield 5 on the telescopic shield 4, and the rest of the structure remains unchanged, as follows:

[0107] Referring to Figure 8 The folding shield 5 is hinged at the end of the telescopic shield 4 to form a telescopic folding shield, multiple hinge seats are arranged at intervals at the ends of the transverse beams of the telescopic shield 4, the hinge seats correspond to the positions of the telescopic shield beams, the ends of the longitudinal rods of the folding shield 5 are connected with the hinge seats, the other ends of the multiple longitudinal rods are connected through a cross rod, the gap between the two longitudinal rods forms an anchoring channel, and the anchor rod is fixed through the anchoring channel to fix the anchoring net laid on the folding shield.

[0108] The running beam 31 of the rear shield frame 3 is a hollow beam, a sliding groove extending in the axial direction is arranged at the bottom of at least one running beam 31, and a fixed plate extending downward is arranged at the bottom of the telescopic shield running beam of the telescopic shield 4, the fixed plate is located in the sliding groove, when the telescopic shield 4 reciprocates, the upper end of the fixed plate is fixed in the sliding groove, one end of the push rod of the folding shield 5 is connected with the fixed plate, and the other end is hinged with the end of the folding shield 5, when the telescopic shield 4 is extended, the folding shield 5 and the push rod move synchronously, and then the folding shield 5 is rotated to a horizontal state through the push rod.

[0109] The construction method of the interactive sliding shield device with telescopic shield 4 will be described in detail below, including the following steps:

[0110] Step 1, the front shield 1 moves synchronously with the tunneling device to temporarily support the roof of the tunnel formed by the current working step.

[0111] Step 2, lay the anchoring net at the bottom of the shield strip 13 and the sliding shield strip 22, and support it through the rear shield frame 3.

[0112] Step 3, adjust the support force of the sliding shield 2 and the roof of the tunnel to zero contact state, and move the sliding shield 2 along the tunneling direction by one working step, and nest with the front shield 1, after the sliding shield 2 moves forward to expose the anchoring point position, anchor the anchoring net, and form permanent support for the roof of the tunnel.

[0113] Step 4, excavate the next working step, the front shield 1 moves synchronously with the tunneling device to temporarily support the roof of the tunnel formed by the current working step.

[0114] Step 5, lower the rear shield frame and extend the telescopic shield 4 to the bottom of the shield strip 13 and the sliding shield strip 22, lay the anchoring net on the telescopic shield 4, and then raise the rear shield frame 3.

[0115] Step 6, adjust the support force of the sliding shield 2 and the roof of the roadway to zero contact state, and move the sliding shield 2 along the tunneling direction by one working step, and nest with the front trailing shield 1, and after the sliding shield 2 moves forward to expose the anchor point position, construct the anchor rod for the anchor net, and form permanent support for the roof of the roadway.

[0116] Step 7, excavate the next working step, and move the front trailing shield 1 synchronously with the tunneling device, and temporarily support the roof of the roadway formed by the current working step by the front trailing shield 1.

[0117] Step 8, lay the anchor net on the folding shield 5, rotate the folding shield 5 to the horizontal state by the push rod, and locate at the bottom of the shield strip 13 and the sliding shield strip 22, and at the same time, the folding shield 5 applies a certain pressure to the roof of the roadway.

[0118] Step 9, adjust the support force of the sliding shield 2 and the roof of the roadway to zero contact state, and move the sliding shield along the tunneling direction by one working step, and nest with the front trailing shield 1, and after the sliding shield 2 moves forward to expose the anchor point position, construct the anchor rod for the anchor net, and form permanent support for the roof of the roadway.

[0119] Step 10, repeat steps 1-9 until the tunneling task is completed.

[0120] The construction method of this embodiment is different from that of embodiment 1, which can complete three working steps to form permanent support for the roof of the roadway at the same time by using the combination of the rear shield frame 3, the telescopic shield 4 and the folding shield 5, thereby further improving the construction efficiency and the safety of tunneling.

[0121] Embodiment 6

[0122] This embodiment 6 is a further optimization of the structure of the interactive sliding trailing shield device of embodiment 1, which mainly optimizes the structure of the sliding shield 2, installs the folding shield 5 on the sliding shield 2, and the rest of the structure remains unchanged, which is as follows:

[0123] Referring to Figure 10 , the folding shield 5 is arranged on the side of the sliding shield 2 close to the rear shield frame, and the folding shield 5 is located at the bottom of the sliding shield strip 22, the multiple longitudinal rods of the folding shield 5 are hinged with the end of the sliding shield body through the hinge seat, and the longitudinal rods are located at the bottom of the adjacent two sliding shield strips 22, one end of the push rod is fixed at the bottom of the sliding shield body 21, and the other end is connected with the folding shield 5.

[0124] The construction method of this embodiment is the same as that of embodiment 4, and will not be repeated here.

[0125] Embodiment 7

[0126] This embodiment 7 is a further optimization of the structure of the interactive sliding trailing shield device of embodiment 1, which mainly optimizes the structure of the sliding shield and the front trailing shield, and the rest of the structure remains unchanged, which is as follows:

[0127] The cross section of the roadway comprises a rectangle and an arc, and in the embodiment, the top surface of the front shield, the sliding shield and the rear shield frame is arc-shaped and matches the arc-shaped top structure of the tunnel.

[0128] For example, the shield body 11 of the front shield, the sliding shield body 21 of the sliding shield 2 and the transverse beam 32 of the rear shield frame 3 are all arc-shaped structures along the transverse cross section of the roadway.

[0129] In the embodiment, the interactive sliding shield device is arranged on the working platform of the tunneling device, the whole device is moved by the tunneling device, and the moving device of the front shield, the sliding shield and the rear shield frame is arranged on both sides of the working platform, so that the construction space of the anchor rod is formed between the interactive sliding shield device and the working platform.

[0130] Embodiment 8

[0131] Referring to Figure 17 In the embodiment, the above-mentioned embodiment is matched with a tunneling machine, and the tunneling machine comprises a main body 300, a power transfer machine 400 and a cutting part 600.

[0132] The upper part of the main body 300 forms an operation platform, the interactive sliding shield device 100 is movably connected with the operation platform, the front direction of the tunneling direction is the front direction, the power transfer machine 400 is arranged at the rear of the main body 300, the power transfer machine 400 and the main body 300 are movably connected with the shovel plate conveyor 500 through an interactive lifting mechanism, the front end of the shovel plate conveyor 500 is movably connected with the cutting part 600, the front shield 1, the sliding shield 2 and the rear shield frame 3 are movably connected with the operation platform, the interactive lifting mechanism drives the shovel plate conveyor 500 or the power transfer machine 400 to move forward or backward with the main body 300 to realize the roadway tunneling circulation propulsion, and the crawler walking mechanism at the bottom of the main body serves as a whole moving or auxiliary moving mechanism.

[0133] The above is only used for describing the technical idea of the present application, and cannot be used to limit the protection scope of the present application. Any modification made according to the technical idea of the present application on the basis of the technical scheme falls within the protection scope of the present application.

Claims

1. An interactive sliding drag shield support device, characterized by, The tunneling machine comprises a front shield (1), a sliding shield (2) and a rear shield frame (3) arranged in sequence along the tunneling direction, the front shield (1) is located at one end close to the tunnel face, the front shield (1), the sliding shield (2) and the rear shield frame (3) can independently move along the tunneling direction, and the front shield (1) and the sliding shield (2) are nested and can be synchronously lifted; The front shield (1) is provided with a plurality of shield supporting strips (13) on the side close to the sliding shield (2), the plurality of shield supporting strips (13) are arranged at intervals along the width of the tunnel, the sliding shield (2) is provided with a plurality of sliding shield strips (22) on the side close to the rear shield frame (3), the plurality of sliding shield strips (22) are arranged at intervals along the width of the tunnel, the plurality of shield supporting strips (13) pass through the front shield (1) and the rear ends thereof are mixed with the plurality of sliding shield strips (22), and the sliding shield strips (22) and the shield supporting strips (13) are alternately arranged along the width of the tunnel, and the rear shield frame (3) is located below the shield supporting strips (13) and the sliding shield strips (22). The front shield (1) comprises a shield body (11) and a shield support (14). The shield body (11) is arranged on the top of the shield support (14), the lower end of the shield support (14) is provided with a moving device, the plurality of shield supporting strips (13) are detachably arranged on the shield body (11), the plurality of shield supporting strips (13) are arranged at intervals along the width of the tunnel, and the distance between two adjacent shield supporting strips (13) is greater than or equal to the width of the sliding shield strip (22). The sliding shield (2) comprises a sliding shield body (21) and a sliding shield support (23). The sliding shield body (21) is internally provided with a sliding cavity, the shield body can be nested in the sliding cavity, the sliding shield body (21) is arranged on the top of the sliding shield support (23), the lower end of the sliding shield support (23) is provided with a moving device, the plurality of sliding shield strips (22) are detachably arranged on the sliding shield body (21), and the plurality of sliding shield strips (22) are arranged at intervals along the width of the tunnel, the sliding shield body (21) is provided with a plurality of sliding grooves on the side close to the rear shield frame, the plurality of sliding grooves and the plurality of sliding shield strips (22) are alternately arranged along the width of the tunnel, and the shield supporting strips (13) of the shield body pass through the sliding cavity and the sliding grooves and extend into between two adjacent sliding shield strips (22) of the sliding shield body. When the roof of the tunnel is anchored and supported, the rear shield frame (3) is used to fix the anchoring net to the bottom of the shield supporting strips (13) and the sliding shield strips (22), the front shield (1) and the sliding shield (2) are alternately moved along the tunneling direction, so that an anchoring area is formed between two adjacent shield supporting strips or two adjacent sliding shield strips, the anchoring net is fixed to the roof of the tunnel through the anchoring area, and permanent support is formed. When the surrounding rock is broken, the anchor rod is inserted into the reserved anchoring hole on the shield supporting strip or / and the sliding shield strip, and the shield supporting strip and the shield body are detached and separated, or / and the sliding shield strip and the sliding shield body are detached and separated.

2. An interactive sliding drag shield support device according to claim 1, wherein, The front shield (1) is a sliding cavity with an open front end, the sliding cavity is provided with an advanced telescopic roof (12), and the advanced telescopic roof (12) can be extended along the tunneling direction.

3. An interactive sliding drag shield support device according to claim 1, wherein, The rear shield frame (3) comprises a shield frame body and a rear shield support (33) arranged at the bottom of the shield frame body, and a moving device is arranged at the lower end of the rear shield support (33), and the top of the shield frame body is used for fixing an anchoring net.

4. An interactive sliding drag shield support device according to claim 1, wherein, The rear shield frame (3) is further provided with a telescopic shield (4) and can be extended or retracted along the tunneling direction.

5. An interactive sliding drag shield support device according to claim 4, wherein, The end of the telescopic shield (4) is hingedly provided with a folding shield (5).

6. An interactive sliding drag shield support device according to claim 1, wherein, The end of the telescopic shield (4) is hingedly provided with a folding shield (5).

7. A method of installing an interactive sliding shield support device according to any one of claims 1 to 6, wherein, The method comprises the following steps: Step 1: When the working face is excavated, the front trailing shield (1) moves to temporarily support the roof of the tunnel formed by the current working step; Step 2: The net is laid at the bottom of the shield strip (13) and the sliding shield strip (22), and the rear shield frame jacks up the anchoring net to be close to the bottom of the shield strip (13) and the sliding shield strip (22); Step 3: Adjust the support force of the sliding shield (2) and the roof of the tunnel to be in zero contact state, and move the sliding shield (2) along the tunneling direction by one working step, and nest the sliding shield (2) with the front trailing shield (1), and the sliding shield (2) is moved to expose the anchoring point position; Step 4: Construct anchor rod or anchor cable at the anchoring point position to form permanent support for the roof of the tunnel and complete the anchoring process; Step 5: Repeat steps 1-4 until the tunnel excavation task is completed.

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