Rockburst steel frame support system and construction method thereof

Abstract

The present application relates to a kind of lag type rock burst steel frame supporting system and its construction method, the system includes annular shrinkable impact-resistant steel frame, annular shrinkable impact-resistant steel frame includes several A type steel frame components and several B type steel frame components, A type steel frame component and B type steel frame component are arc-shaped, annular alternately arranged;A type steel frame component end has insertion slot, B type steel frame component end is inserted into the insertion slot of A type steel frame component, and is movably connected by impact-resistant connecting rod each other.The present application enhances the toughness of supporting structure, improves the ability of supporting structure to resist burst rock block strong impact, prevents sudden brittle failure, avoids underground cavern suddenly collapse caused by lag type rock burst etc.;In addition, increase the ability of supporting system active energy release, provide release space for cavern excavation after rock mass energy adjustment, cavern surrounding rock deformation expansion, to avoid lag type rock burst or reduce the intensity grade of lag type rock burst etc..

Description

Technical Field

[0001] This invention relates to the field of tunnel and underground engineering construction technology, specifically to a delayed rockburst steel frame support system and its construction method. Background Technology

[0002] During the construction of deep-buried transportation, water conservancy, and mining projects, the high ground stress caused by deep burial can lead to the sudden release of a large amount of elastic strain energy stored in the rock mass during excavation or external disturbances. This can result in rock bursts, spalling, detachment, and even ejection, a phenomenon known as rockburst disasters. Rockburst disasters have two main characteristics: the release of enormous energy and instantaneous impact loads. They can cause significant economic losses, casualties, and project delays.

[0003] Rockbursts can be classified into immediate rockbursts and delayed rockbursts based on their temporal and spatial characteristics. Immediate rockbursts occur shortly after excavation, typically within hours of the excavation face. Delayed rockbursts, on the other hand, occur days, months, or even longer after excavation. Immediate rockbursts usually require support measures to be implemented after they occur, while delayed rockbursts typically occur after the support structure has been installed. Due to current technological limitations, the timing, location, and intensity of delayed rockbursts are difficult to predict accurately, making them more dangerous.

[0004] Existing rockburst prevention measures mainly target immediate rockbursts, i.e., support measures are taken to prevent and control rockbursts after they occur during construction. The specific process is as follows: if a rockburst occurs after excavation, shotcrete is used to fill the crater and seal the rock surface, forming a complete and sealed shotcrete layer; then, anchor bolts are installed on the top and side walls of the tunnel to erect a steel frame, and shotcrete is applied again to form a complete support system. After an immediate rockburst, the strain energy stored in the rock mass is released all at once, with the remaining amount being relatively small. A secondary rockburst is usually unlikely, as the rock mass transitions from an "active" to a "quiet" state. Therefore, using the above-mentioned conventional support after a disaster is feasible and essentially not much different from conventional tunnel support.

[0005] For delayed rockburst disaster protection, only reinforcement measures are taken, such as increasing the thickness of shotcrete layers, increasing the number of anchor bolts, and strengthening the steel frame type and reducing the spacing. Although these measures enhance rockburst resistance, they are essentially passive resistance measures with limited effectiveness, reduced construction efficiency, and significantly increased project investment. Furthermore, delayed rockbursts are sudden ejections after rock mass fracturing, exhibiting significant dynamic impact. Existing support structures often lack sufficient toughness and have limited impact resistance, making them prone to brittle failure without warning under large impacts. Moreover, most existing support structures lack the ability to release energy. For delayed rockbursts, the formation mechanism and main inducing factor is the enormous energy (strain energy) contained in the deep surrounding rock, accompanied by the displacement of the surrounding rock into the excavation face (i.e., strain energy release, expansion of the surrounding rock volume). When the energy accumulated in the surrounding rock reaches the rock mass failure threshold, it is suddenly released. Therefore, fully rigid support cannot provide sufficient deformation space for the energy release of the rock mass.

[0006] Therefore, it is necessary to propose new measures to overcome the above-mentioned shortcomings. Summary of the Invention

[0007] The purpose of this invention is to provide a delayed rockburst steel frame support system and its construction method to solve the problem of the lack of effective measures to deal with delayed rockburst.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A delayed rockburst steel frame support system is provided, the system comprising a circumferentially retractable impact-resistant steel frame, the circumferentially retractable impact-resistant steel frame comprising a plurality of A-type steel frame components and a plurality of B-type steel frame components, the A-type steel frame components and the B-type steel frame components being arc-shaped and arranged alternately in the circumferential direction; The A-type steel structure component has a slot at its end, and the B-type steel structure component is inserted into the slot of the A-type steel structure component and is movably connected to each other by an impact-resistant connecting rod.

[0009] Furthermore, the A-type steel structure member has a curved web, and the web has flanges on both sides. The cross-section of the A-type steel structure member is U-shaped with the U-shaped groove facing inward.

[0010] Furthermore, the A-type steel structure component has perforated end plates at both circumferential ends. The perforated end plates have through holes, and there are gaps between the two sides and the flanges of the A-type steel structure component to form slots.

[0011] Furthermore, the B-type steel structure member has a curved web, and the web has flanges on both sides. The cross-section of the B-type steel structure member is U-shaped with the U-shaped groove facing outward.

[0012] Furthermore, the circumferential ends of the B-type steel structure component are provided with B-type steel structure component end plates with slots, and the B-type steel structure component end plates with slots have grooves facing outwards; When the type B steel frame component and the type A steel frame component are plugged into each other, the flange of the type B steel frame component is inserted into the slot of the type A steel frame component.

[0013] Furthermore, the impact-resistant connecting rod includes an impact-resistant connecting rod body, one end of which has an enlarged impact-resistant connecting rod end; The impact-resistant connecting rod body is provided with external threads, and an internal fastening nut and an external fastening nut for the impact-resistant connecting rod are provided on it.

[0014] Furthermore, when the type B steel frame component and the type A steel frame component are inserted into each other, the impact-resistant connecting rod is inserted into the through hole of the type A steel frame component and the groove of the type B steel frame component; The outer fastening nut of the impact-resistant connecting rod is located on the inner side of the perforated end plate of the type A steel structure component, and the end of the impact-resistant connecting rod and the inner fastening nut of the impact-resistant connecting rod are located on the inner and outer sides of the slotted end plate of the type B steel structure component.

[0015] Furthermore, the system also includes high-strength long anchor cables; After the inner side of the circumferential retractable impact-resistant steel frame is covered with a convex anchor cable end plate, the high-strength long anchor cable is inserted into the surrounding rock from the convex anchor cable end plate.

[0016] Furthermore, the cross-section of the convex anchor cable end plate is shaped like a "Z", and the bottom plates on both sides have convex anchor cable end plate holes; The convex anchor cable end plate covers the overlapping part where the type A steel structure component and the type B steel structure component intersect, and the high-strength long anchor cable is inserted into the hole of the convex anchor cable end plate and anchored.

[0017] On the other hand, a construction method for the delayed rockburst steel frame support system as described above is characterized by: The construction method includes: The web of the A-type steel frame component is attached to the tunnel wall. Impact-resistant connecting rods are installed at both ends of the circumferential direction of the A-type steel frame component; The U-shaped groove side of the B-type steel structure component adjacent to the A-type steel structure component is overlapped and inserted into place, and the impact-resistant connecting rod is inserted into the groove of the B-type steel structure component with the slot end plate. The impact-resistant connecting rod is fastened into place by the inner fastening nut and the outer fastening nut of the impact-resistant connecting rod, forming a circumferential retractable impact-resistant steel frame; The convex anchor cable end plate is pressed from the inside out onto the overlapping part where the A-type steel structure component and the B-type steel structure component intersect, and high-strength long anchor cables are installed in the holes of the convex anchor cable end plate on both sides of the bottom plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a delayed rockburst steel frame support system and its construction method, which enhances the toughness of the support structure. By using high-toughness, impact-resistant support components, it improves the support structure's ability to resist the strong impact of blasted rock fragments, preventing sudden brittle failure and avoiding sudden collapse of underground caverns caused by delayed rockbursts. Furthermore, it increases the active energy release capability of the support system. Through components with significant deformation adjustment capabilities, it provides release space for rock mass energy adjustment and surrounding rock deformation expansion after cavern excavation, thereby preventing delayed rockbursts or reducing their intensity. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of the A-type steel frame component provided in an embodiment of the present invention.

[0021] Figure 2 This is an enlarged view of the end of the A-type steel structure component provided in an embodiment of the present invention.

[0022] Figure 3 This is a structural diagram of a type B steel frame component provided in an embodiment of the present invention.

[0023] Figure 4 This is an enlarged view of the end of the B-type steel structure component provided in an embodiment of the present invention.

[0024] Figure 5 This is a structural diagram of the impact-resistant connecting rod provided in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram showing the assembly and disassembly of the components of the circumferential retractable impact-resistant steel frame provided in an embodiment of the present invention.

[0026] Figure 7 This is a cross-sectional view of the overlapping part of the circumferential retractable impact-resistant steel frame after assembly, as provided in the embodiment of the present invention.

[0027] Figure 8This is an overall diagram of the assembled circumferential retractable impact-resistant steel frame provided in an embodiment of the present invention.

[0028] Figure 9 This is a perspective view of the assembled circumferential retractable impact-resistant steel frame provided in an embodiment of the present invention.

[0029] Figure 10 This is a structural diagram of the convex anchor cable end plate (double hole) provided in an embodiment of the present invention.

[0030] Figure 11 This is a structural diagram of the convex anchor cable end plate (single hole) provided in an embodiment of the present invention.

[0031] Figure 12 This is a schematic diagram of the installation of the high-strength long anchor cable and the convex anchor cable end plate (double hole) provided in the embodiment of the present invention.

[0032] Figure 13 This is a schematic diagram of the installation of the high-strength long anchor cable and the convex anchor cable end plate (single hole) provided in an embodiment of the present invention.

[0033] Figure 14 This is an overall diagram of the assembled delayed rockburst steel frame support system provided in the embodiments of the present invention.

[0034] Figure 15 This is a three-dimensional view of the assembled delayed rockburst steel frame support system provided in the embodiment of the present invention.

[0035] The diagram is labeled as follows: 1-Type A steel frame component, 2-Type B steel frame component, 3-Impact-resistant connecting rod, 4-Convex anchor cable end plate, 5-High-strength long anchor cable; 11- Flange of type A steel frame component; 12- Web of type A steel frame component; 13- End plate with holes of type A steel frame component. 21- Type B steel frame component flange, 22- Type B steel frame component web, 23- Type B steel frame component end plate with slot; 31-Impact-resistant connecting rod body; 32-Impact-resistant connecting rod inner fastening nut; 33-Impact-resistant connecting rod outer fastening nut; 34-Impact-resistant connecting rod end; 41- Convex anchor cable end plate hole; 51-High-strength long anchor head, 52-High-strength long anchor body. Detailed Implementation

[0036] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Furthermore, in the description of this invention, the terms "Type A," "Type B," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Of course, such terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than those illustrated or described herein.

[0040] It should also be noted that although the order of steps is mentioned in the method description, in some cases, steps may be performed in a different order than that described here, and this should not be interpreted as a restriction on the order of steps.

[0041] In a specific implementation, the area near the surrounding rock is defined as the outer side, and the area near the tunnel interior is defined as the inner side. Furthermore, in type A steel frame member 1 and type B steel frame member 2, the interior of the member is defined as the inner side, and the exterior of the member is defined as the outer side.

[0042] This invention addresses the two major challenges of delayed rockbursts: their enormous energy and instantaneous impact. It provides a delayed rockburst steel frame support system suitable for construction in high-stress, deeply buried environments. Unlike existing technologies that merely enhance support parameters to increase rockburst resistance, this invention designs a deformable support system with toughness and energy release capabilities. This effectively addresses delayed rockburst hazards and prevents the support system from undergoing sudden, brittle failure. Specifically, the system includes a circumferentially retractable impact-resistant steel frame and high-strength long anchor cables 5 driven radially into the surrounding rock. The circumferentially retractable impact-resistant steel frame has significant deformation adjustment capabilities, while the high-strength long anchor cables 5 form the radial impact-resistant system. This provides effective support to the surrounding rock in both circumferential and radial directions, while simultaneously resisting the impact of delayed rockbursts on the tunnel support system.

[0043] The circumferentially collapsible impact-resistant steel frame comprises two types of steel structural components, Type A steel structural component 1 and Type B steel structural component 2, both of which are arc-shaped and arranged alternately in a circumferential manner, and are made of U-shaped steel sections bent into shape. Figure 8 and Figure 9 In one embodiment, the circumferential retractable impact-resistant steel frame includes two type A steel frame components 1 and two type B steel frame components 2, which are alternately distributed with the positions of similar steel frame components radially opposite each other. In other embodiments, the number of steel frame components can be increased according to actual needs. For example, the entire ring steel frame can be divided into four parts (upper and lower, left and right) according to the cross-sectional shape and size of the tunnel, and the installation sequence can also be adjusted accordingly based on the number of type A and type B steel frame components. The length of the overlapping and splicing section of type A and type B steel frame components can be flexibly adjusted according to the expected load, and impact-resistant connecting rods 3 of corresponding lengths are used in conjunction.

[0044] Type A steel frame component 1 and Type B steel frame component 2 have different end structures. Type A steel frame component 1 has a slot at its end, and Type B steel frame component 2 is inserted into the slot of Type A steel frame component 1 at its end, and they are movably connected to each other by an impact-resistant connecting rod 3.

[0045] like Figure 1 and Figure 2 The A-type steel frame member 1 has a curved web 12, with flanges 11 on both sides of the web 12. The cross-section of the A-type steel frame member 1 is U-shaped with the U-shaped groove facing inward. Perforated end plates 13 are provided at both circumferential ends of the A-type steel frame member 1, which are welded and fixed for installing the ends of the impact-resistant connecting rods 3. The perforated end plates 13 have through holes, and gaps exist between their sides and the flanges 11, forming slots so that the flanges of the B-type steel frame member 2 can be inserted.

[0046] like Figure 3 and Figure 4The B-type steel frame member 2 has a curved web 22, with flanges 21 on both sides of the web 22. The cross-section of the B-type steel frame member 2 is U-shaped with the U-shaped groove facing outwards. Both circumferential ends of the B-type steel frame member 2 are provided with slotted end plates 23, which are welded and fixed. When the A-type steel frame member 1 and two B-type steel frame members 2 are connected, these end plates serve as bolt washers for the impact-resistant connecting rods 3. The slotted end plates 23 have grooves facing outwards. When the B-type steel frame member 2 and the A-type steel frame member 1 are interlocked, the flanges 21 of the B-type steel frame member are inserted into the slots of the A-type steel frame member 1.

[0047] like Figure 5 The impact-resistant connecting rod 3 includes an impact-resistant connecting rod body 31, one end of which has an enlarged impact-resistant connecting rod end 34. The impact-resistant connecting rod body 31 is provided with external threads, and an internal impact-resistant connecting rod fastening nut 32 and an external impact-resistant connecting rod fastening nut 33 are provided thereon. Figure 6 and Figure 7 When the type B steel frame component 2 and the type A steel frame component 1 are interlocked, the impact-resistant connecting rod body 31 is inserted into the through hole of the type A steel frame component 1 and the groove of the type B steel frame component 2. At this time, the outer fastening nut 33 of the impact-resistant connecting rod is located inside the end plate 13 with holes of the type A steel frame component, and the end 34 of the impact-resistant connecting rod and the inner fastening nut 32 of the impact-resistant connecting rod are located on the inner and outer sides of the end plate 23 with slots of the type B steel frame component.

[0048] In terms of geometric characteristics, the net dimension between the two flanges of Type A steel frame component 1 should be greater than the total width of the web of Type B steel frame component 2 to meet the connection requirements of overlapping joints. In terms of material characteristics, Type A steel frame component 1 and Type B steel frame component 2 can be made of ordinary structural steel, while the impact-resistant connecting rod 3 can be made of shape memory alloy or high-strength, high-toughness steel, or a high-strength spring can be used instead.

[0049] The above-mentioned circumferentially collapsible impact-resistant steel frame enhances the toughness of the delayed rockburst support structure. By using high-toughness, impact-resistant support components, it improves the support structure's resistance to the intense impact of blasted rock fragments, preventing sudden brittle failure and avoiding sudden collapse of underground caverns due to delayed rockbursts. Furthermore, it increases the support system's active energy release capability. Through components with significant deformation adjustment capabilities, it provides release space for rock mass energy adjustment and surrounding rock deformation expansion after cavern excavation, thereby preventing delayed rockbursts or reducing their intensity.

[0050] like Figures 10-13The system of this invention also includes a tunnel radial impact-resistant anchor cable system, specifically comprising a high-strength long anchor cable 5 and a convex anchor cable end plate 4. The high-strength long anchor cable 5 further comprises a high-strength long anchor cable head 51 and a high-strength long anchor cable body 52. ​​After the convex anchor cable end plate 4 is covered on the inner side of the circumferential retractable impact-resistant steel frame, the high-strength long anchor cable 5 is inserted into the surrounding rock from the convex anchor cable end plate 4. Specifically, the cross-section of the convex anchor cable end plate 4 is Z-shaped, and the bottom plates on both sides have convex anchor cable end plate holes 41, symmetrically arranged in one or two pairs. The convex anchor cable end plate 4 covers the overlapping part where the A-type steel frame member 1 and the B-type steel frame member 2 interlock. The high-strength long anchor cable body 52 is inserted into the convex anchor cable end plate holes 41 and anchored through the high-strength long anchor cable head 51. The opening width of the convex anchor cable end plate 4 should be able to fit snugly into the overlapping part where the A-type steel frame component 1 and the B-type steel frame component 2 interlock, forming a complete cover. High-strength long anchor cables 5 anchor the convex anchor cable end plate 4 to the surrounding rock. Prestress can be applied to the anchor bolts according to the support requirements, and the number of high-strength long anchor cables 5 can be symmetrically set in two or four, depending on the support needs. If the energy level of the surrounding rock is predicted to be high, potentially leading to a high-intensity rockburst, four long anchor cables should be selected for reinforcement.

[0051] like Figure 14 and Figure 15 Ultimately, the radial impact-resistant anchor cable system combined with the circumferential collapsible impact-resistant steel frame forms the delayed rockburst steel frame support system of this invention, creating a dual impact-resistant system with significantly enhanced support structure toughness. In the circumferential direction, impact-resistant toughness is provided by the impact-resistant connecting rods at the steel frame component connections; in the radial direction, impact-resistant toughness is provided by high-strength long anchor cables. The stress stability of the circumferential steel frame is greatly improved, transforming the traditionally unstable axial compression / bending compression components into an axial tension / bending tension stress mode through staggered stacking of steel frames and tie rod connections, significantly improving out-of-plane stability.

[0052] The construction method of the aforementioned delayed rockburst steel frame support system specifically includes the following steps: Phase 1: Construction of the circumferential retractable impact-resistant steel frame for the tunnel.

[0053] The A-type steel frame component 1, the B-type steel frame component 2, and the impact-resistant connecting rod 3 form a complete ring steel frame support to resist the convergent deformation of the tunnel wall surrounding rock towards the excavated free face.

[0054] S1: The web plate 12 of the A-type steel structure component 1 is attached to the tunnel wall; S2: Install impact-resistant connecting rods 3 at both ends of the circumferential direction of the A-type steel frame component 1; S3: Overlap and insert one side of the U-shaped groove of the B-type steel structure component 2 adjacent to the A-type steel structure component 1, and insert the impact-resistant connecting rod 3 into the groove of the B-type steel structure component with slot end plate 23 of the B-type steel structure component 2; S4: The impact-resistant connecting rod 3 is fastened into place by the inner fastening nut 32 and the outer fastening nut 33 of the impact-resistant connecting rod to form a circumferential retractable impact-resistant steel frame; Phase 2: Radial impact-resistant anchor cable system for construction tunnels.

[0055] S5: Press the convex anchor cable end plate 4 from the inside out onto the overlapping part where the A-type steel structure component 1 and the B-type steel structure component 2 are interlocked, and install high-strength long anchor cables 5 in the holes 41 of the convex anchor cable end plate on both sides of the bottom plate.

[0056] The delayed rockburst steel frame support system and its construction method provided by this invention have the following technical advantages: (1) Traditional solutions use rigid bolt connections at the ends of steel frame components or connections with compression-bearing bodies. The stress they are subjected to is essentially axial compression / bending compression, which can easily lead to out-of-plane instability of the components. In this invention, the ends of the A-type steel frame component 1 and the B-type steel frame component 2 are "overlapping" assembled. They are connected by an impact-resistant connecting rod in the overlapping section. When the overlapping part of components A and B undergoes relative displacement due to the compression of the surrounding rock, the tensile force of the impact-resistant connecting rod 3 can provide resistance (restoring force). At this time, the stress at the connection point is changed from "compression" to "tension" in the traditional structure. The "axial tension / tension-bending" of this invention does not have the problem of out-of-plane instability, and effectively solves the stability of the steel frame joint under static pressure and the toughness performance of the steel frame under dynamic impact.

[0057] (2) After the circumferential integral steel frame provides support and impact resistance, in order to provide stronger dynamic and static bearing capacity for the support system in the deep part of the surrounding rock in the radial direction of the tunnel, a radial impact-resistant anchor cable system is installed at each joint of the steel frame. The high-strength long anchor cable 5 has excellent tensile anchoring capacity, and its elongation and dynamic impact resistance are better than traditional steel bar anchors. It can provide effective protection and safety reserves for dealing with the convergence deformation of the surrounding rock and rock burst disasters.

[0058] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A delayed rockburst steel frame support system, characterized in that: The system includes a circumferentially retractable impact-resistant steel frame, which includes several A-type steel frame components (1) and several B-type steel frame components (2). The A-type steel frame components (1) and the B-type steel frame components (2) are both arc-shaped and arranged alternately in the circumferential direction. The A-type steel structure component (1) has a slot at its end, and the B-type steel structure component (2) is inserted into the slot of the A-type steel structure component (1) and is movably connected to each other by an impact-resistant connecting rod (3). The A-type steel structure member (1) has a curved A-type steel structure member web (12), and the A-type steel structure member flange (11) is located on both sides of the web (12). The cross-section of the A-type steel structure member (1) is U-shaped with the U-shaped groove facing inward. The A-type steel structure component (1) is provided with perforated end plates (13) at both circumferential ends. The perforated end plates (13) have through holes and gaps between the two sides and the flanges (11) of the A-type steel structure component, forming slots. The B-type steel structure member (2) has a curved B-type steel structure member web (22), and the B-type steel structure member flange (21) is located on both sides of the web (22). The cross section of the B-type steel structure member (2) is U-shaped with the U-shaped groove facing outward. The B-type steel structure component (2) is provided with a B-type steel structure component end plate (23) with a slot at both circumferential ends. The B-type steel structure component end plate (23) with a slot has a groove facing outward. When the B-type steel structure component (2) and the A-type steel structure component (1) are inserted into each other, the flange (21) of the B-type steel structure component is inserted into the slot of the A-type steel structure component (1); The impact-resistant connecting rod (3) includes an impact-resistant connecting rod body (31), one end of which has an enlarged impact-resistant connecting rod end (34). The impact-resistant connecting rod body (31) is provided with external threads, and an impact-resistant connecting rod inner fastening nut (32) and an impact-resistant connecting rod outer fastening nut (33) are provided on it. When the B-type steel structure component (2) and the A-type steel structure component (1) are inserted into each other, the impact-resistant connecting rod body (31) is inserted into the through hole of the A-type steel structure component (1) and the groove of the B-type steel structure component (2); The outer fastening nut (33) of the impact-resistant connecting rod is located on the inner side of the end plate (13) with holes of the type A steel structure component, and the end (34) of the impact-resistant connecting rod and the inner fastening nut (32) of the impact-resistant connecting rod are located on the inner and outer sides of the end plate (23) with slots of the type B steel structure component.

2. The delayed rockburst steel frame support system according to claim 1, characterized in that: The system also includes high-strength long anchor cables (5); After the inner side of the circumferential retractable impact-resistant steel frame is covered with a convex anchor cable end plate (4), the high-strength long anchor cable (5) is inserted into the surrounding rock from the convex anchor cable end plate (4).

3. The delayed rockburst steel frame support system according to claim 2, characterized in that: The cross section of the convex anchor cable end plate (4) is in a shape of "several", and the bottom plates on both sides are provided with convex anchor cable end plate holes (41); The convex anchor cable end plate (4) covers the overlapping part where the A-type steel frame member (1) and the B-type steel frame member (2) are inserted into each other, and the high-strength long anchor cable (5) is inserted into the convex anchor cable end plate hole (41) for anchoring.

4. A construction method for the hysteretic rock burst steel frame support system as claimed in claim 3, characterized in that: The construction method comprises: The web plate (12) of the A-type steel frame member (1) is attached to the tunnel wall with its back side; Impact-resistant connecting rods (3) are respectively installed at the two circumferential ends of the A-type steel frame member (1); One side of the U-shaped groove of the B-type steel frame member (2) adjacent to the A-type steel frame member (1) is overlapped and inserted into place, and the impact-resistant connecting rod (3) is clamped into the groove of the slotted end plate (23) of the B-type steel frame member; The impact-resistant connecting rod (3) is fastened in place through the inner fastening nut (32) of the impact-resistant connecting rod and the outer fastening nut (33) of the impact-resistant connecting rod, so as to form a circumferential contractible impact-resistant steel frame; The convex anchor cable end plate (4) is pressed from the inside to the outside on the overlapping part where the A-type steel frame member (1) and the B-type steel frame member (2) are inserted into each other, and high-strength long anchor cables (5) are installed in the convex anchor cable end plate holes (41) on the bottom plates on both sides thereof.

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