Method and system for monitoring damage and deterioration degree of surrounding rock of roadway

Abstract

The invention relates to the field of roadway supporting, and provides a method and system for monitoring the damage and deterioration degree of roadway surrounding rock.The method for monitoring the damage and deterioration degree of the roadway surrounding rocks.The method comprises the steps that the drilling position is determined on the roadway surrounding rocks.The drilling position is determined; wave velocities of different depths of the surrounding rock are obtained in the drilling depth direction; determining the damage degradation depth of the surrounding rock based on the wave velocity; and determining a surrounding rock damage degradation range factor and a damage factor based on the damage degradation depth. The method for monitoring the damage and deterioration degree of the surrounding rock of the roadway is used for overcoming the defect that the damage and deterioration degree of the surrounding rock of the roadway is unclear in the prior art, the damage and deterioration range factor and the damage factor of the surrounding rock are determined by drilling the surrounding rock of the roadway and detecting the wave velocity in the drill hole, and then the damage and deterioration area of the surrounding rock is monitored. The comprehensive assessment of the roadway surrounding rock is realized, targeted support is performed on the surrounding rock damage and deterioration area, the roadway support effect is improved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel support, and in particular to a method and system for monitoring the degree of damage and deterioration of tunnel surrounding rocks. Background Art

[0002] Excavation of coal mine tunnels disrupts the original stress equilibrium of the surrounding rock, causing stress redistribution. High stresses gradually cause the shallow surrounding rock in the tunnel to fracture and deteriorate. Based on the loosening zone theory, the goal of tunnel surrounding rock control is to reinforce the damaged and deteriorated surrounding rock to prevent instability and failure.

[0003] At present, the most common method of supporting surrounding rock in coal mine roadways in my country is bolt and cable support. However, due to the lack of understanding of the degree of damage and damage range of the surrounding rock, the selection of bolt and cable lengths in traditional coal mine roadway bolt support often relies more on engineering experience, and the selection of support strength of support components is relatively blind. This often leads to excessive support of the surrounding rock, resulting in waste of support materials and a large expenditure of manpower, or insufficient support strength, resulting in the need for secondary support of the roadway, which greatly affects the safe and efficient mining of the mine. Summary of the Invention

[0004] The present invention provides a method and system for monitoring the degree of damage and deterioration of tunnel surrounding rock, which is used to solve the defect of unclear degree of damage and deterioration of tunnel surrounding rock in the prior art, realize the measurement based on the wave velocity in the borehole, thereby determining the damage and deterioration range factor and damage factor, and then monitoring the damage and deterioration range of the tunnel, improving the targetedness of tunnel support, and saving costs.

[0005] The present invention provides a method for monitoring the degree of damage and degradation of surrounding rock in a roadway, comprising: Confirm the drilling position on the surrounding rock of the roadway; Obtaining wave velocities at different depths of surrounding rock along the depth direction of the borehole; determining a damage and degradation depth of the surrounding rock based on the wave velocity; Based on the damage degradation depth, the surrounding rock damage degradation range factor and the damage factor are determined.

[0006] According to the method for monitoring the degree of damage and degradation of surrounding rock in a tunnel provided by the present invention, obtaining the wave velocity at different depths of the surrounding rock along the depth direction of the borehole includes: Install the ultrasonic transmitting probe and the ultrasonic receiving probe on the conveying rod; The delivery rod is placed in the borehole, and the ultrasonic transmitting probe and the ultrasonic receiving probe are fitted to the inner wall of the borehole; The ultrasonic wave velocities at different depths of the borehole are obtained.

[0007] According to the method for monitoring the degree of damage and degradation of surrounding rock of a roadway provided by the present invention, determining the damage and degradation depth of the surrounding rock based on the wave velocity includes: Plotting a graph of the wave velocity versus the detection depth; Determine the constant wave velocity value; The damage degradation depth is determined based on the constant wave velocity value.

[0008] According to the method for monitoring the degree of damage and degradation of surrounding rock in a roadway provided by the present invention, determining the surrounding rock damage and degradation range factor includes: Get the lane radius; A surrounding rock damage degradation range factor is determined based on the roadway radius and the damage degradation depth.

[0009] According to the method for monitoring the degree of damage and degradation of surrounding rock in a roadway provided by the present invention, determining the damage factor of surrounding rock damage and degradation includes: Obtaining the wave velocity within the damage degradation depth range; A surrounding rock damage factor is determined based on the constant wave velocity value and the wave velocity within the damage degradation depth range.

[0010] According to the method for monitoring the damage and deterioration degree of tunnel surrounding rock provided by the present invention, the drilling position includes the tunnel roof and floor and the surrounding rock on both sides.

[0011] The method for monitoring the damage and degradation degree of surrounding rock of a roadway provided by the present invention further includes: Based on the surrounding rock damage degradation range factor and the damage factor, the tunnel support strength is determined.

[0012] According to the method for monitoring the degree of damage and deterioration of tunnel surrounding rock provided by the present invention, the support strength includes the length and support density of the support member.

[0013] According to the method for monitoring the degree of damage and degradation of surrounding rock of a roadway provided by the present invention, determining the roadway support strength based on the surrounding rock damage and degradation range factor and the damage factor includes: In the surrounding rock damage degradation range, the larger the factor, the larger the damage factor, the longer the length of the support member, and the greater the support density.

[0014] The present invention further provides a system for monitoring the degree of damage and degradation of surrounding rock in a roadway, which is applied to the method for monitoring the degree of damage and degradation of surrounding rock in a roadway as described above, comprising: Wave velocity detection module, which obtains the wave velocity at different depths of the surrounding rock along the depth direction of the borehole; a damage degradation depth confirmation module, which determines the damage degradation depth of the surrounding rock based on the wave velocity; The damage degradation degree calculation module determines the surrounding rock damage degradation range factor and the damage factor based on the damage degradation depth.

[0015] The method for monitoring the degree of damage and deterioration of tunnel surrounding rock provided by the present invention determines the surrounding rock damage and deterioration range factor and damage factor by drilling holes in the tunnel surrounding rock and performing wave velocity detection in the borehole, and then monitors the surrounding rock damage and deterioration area, thereby achieving a comprehensive assessment of the tunnel surrounding rock, carrying out targeted support for the surrounding rock damage and deterioration area, improving the tunnel support effect, and reducing costs.

[0016] Furthermore, the system for monitoring the degree of damage and degradation of surrounding rocks of a roadway provided by the present invention also has the various advantages described above because it is equipped with the method for monitoring the degree of damage and degradation of surrounding rocks of a roadway as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is one of the flow charts for monitoring the damage and degradation degree of surrounding rock in a roadway provided by the present invention; Figure 2 This is the second flow diagram of monitoring the damage and degradation degree of surrounding rock in a roadway provided by the present invention; Figure 3 Schematic diagrams of the ultrasonic wave velocity detection of surrounding rock provided by the present invention, wherein (a), (b), and (c) are schematic diagrams of the detection states at different drilling depths respectively; Figure 4 This is the third flow chart of monitoring the damage and degradation degree of surrounding rock in a roadway provided by the present invention; Figure 5 This is a graph showing the relationship between wave velocity and drilling depth provided by the present invention; Figure 6 This is the fourth flow chart of monitoring the damage and degradation degree of surrounding rock in a roadway provided by the present invention; Figure 7 This is a schematic diagram of the surrounding rock damage and degradation zone provided by the present invention; Figure 8 This is the fifth flow chart of monitoring the damage and degradation degree of tunnel surrounding rock provided by the present invention.

[0019] Reference numerals: 100: conveying rod; 101: ultrasonic transmitting probe; 102: ultrasonic receiving probe; 103: ultrasonic detector; 200: drilling. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0023] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0024] Aiming at the problem that the degree and scope of damage and deterioration of surrounding rock in coal mine roadways in my country are unclear, which leads to no basis for selecting support parameters such as anchor rods and anchor cables in roadway surrounding rock, resulting in excessive support or insufficient support, a method and system for monitoring the degree of damage and deterioration of surrounding rock in roadways are invented.

[0025] The present invention drills holes in the roof and floor plates and surrounding rocks on both sides of a coal mine roadway, and uses an ultrasonic detection device to monitor the ultrasonic longitudinal wave velocity at multiple measuring points in the holes to obtain the longitudinal wave velocity characteristics at different positions in the holes. Based on the longitudinal wave velocity characteristics, the longitudinal wave velocity in the undisturbed area is determined, and this is used as a benchmark to evaluate the damaged and degraded areas and strengthened areas of the rock mass. By analyzing the ultrasonic wave velocity characteristics of the rock mass in the damaged and degraded areas, the damage and degraded range and degree of the roof and floor plates and surrounding rocks on both sides of the roadway are determined, thereby providing a basis and reference for the selection of anchor rod and cable support parameters for the roadway surrounding rock.

[0026] The following combination Figures 1 to 8 It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute a limitation on the present invention.

[0027] like Figure 1 As shown, the present invention provides a method for monitoring the degree of damage and degradation of surrounding rock in a roadway, comprising: S1: Confirm the drilling position on the tunnel surrounding rock; drilling can be performed on multiple faces of the tunnel surrounding rock, and each face can have multiple holes.

[0028] S2: Obtain the wave velocity at different depths of the surrounding rock along the depth direction of the borehole; measure the wave velocity for each borehole, measure the wave velocity at different depths of the borehole, and obtain the wave velocity data for each borehole.

[0029] S3: Determine the damage depth of the surrounding rock based on the wave velocity; that is, analyze the wave velocity data obtained from each borehole to confirm the damage depth of each borehole, and then obtain the damage depth of the entire surrounding rock.

[0030] S4: Determine the surrounding rock damage range factor and damage factor based on the damage depth. Calculate the damage range factor and damage factor for each borehole, and assess the damage degree of each borehole based on the damage range factor and damage factor. This in turn assesses the damage degree of the entire surrounding rock.

[0031] The present invention can guide tunnel support through the surrounding rock damage degradation range factor and the damage factor, avoid blind support, reduce support costs, and improve support effects.

[0032] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, step S2 of the present invention obtains the wave velocity at different depths of the surrounding rock along the depth direction of the borehole 200, including: S21: Installing the ultrasonic transmitting probe 101 and the ultrasonic receiving probe 102 on the conveying rod 100; S22: placing the delivery rod 100 in the borehole 200, and placing the ultrasonic transmitting probe 101 and the ultrasonic receiving probe 102 in contact with the inner wall of the borehole 200; S23: Obtaining ultrasonic wave velocities at different depths of the borehole 200.

[0033] Specifically, ultrasound is used to obtain the longitudinal wave velocity of the surrounding rock. An ultrasonic transmitter probe 101 and an ultrasonic receiver probe 102 are located a certain distance L on the conveyor rod 100. After ultrasonic transmitter probe 101 transmits an ultrasonic wave, it propagates through the rock mass to ultrasonic receiver probe 102. The ultrasonic detector 103 calculates the propagation time as Δt and calculates the ultrasonic wave velocity of the surrounding rock at that depth as Vp = L / Δt. The ultrasonic detector 103 is electrically connected to the ultrasonic transmitter probe 101 and the ultrasonic receiver probe 102.

[0034] For example, Figure 3 As shown, the borehole 200 has a depth of D, and ten velocity measurements are performed within the borehole 200. Each time the ultrasonic receiving probe 102 moves a distance D / 10, a velocity measurement is performed. Alternatively, the borehole 200 has a depth of D, and the velocity is measured once every predetermined distance until the ultrasonic receiving probe 102 reaches the bottom of the borehole 200.

[0035] Among them, since there is a distance L between the ultrasonic transmitting probe 101 and the ultrasonic receiving probe 102, the depth of the borehole 200 corresponding to the measured ultrasonic wave velocity is: the middle position of the ultrasonic transmitting probe 101 and the ultrasonic receiving probe 102, that is, the position L / 2, and the distance from the opening position of the borehole 200.

[0036] like Figure 4 and Figure 5 As shown, in another embodiment of the present invention, step S3 of determining the damage and degradation depth of the surrounding rock based on the wave velocity includes: S31: Plotting a curve graph of the wave velocity and the detection depth; that is, plotting a curve graph of the change of the wave velocity with the detection depth.

[0037] S32: Determine the constant wave velocity value; According to the loosening zone theory of the surrounding rock in the tunnel, the surrounding rock in the undisturbed area has not been damaged and degraded, and its wave velocity is a constant value Vp0. Figure 5 As shown, the wave velocity between the drilling depth D2 and D3 is a constant wave velocity value Vp0. Therefore, the drilling depth between D2 and D3 is an undisturbed zone.

[0038] S33: Determine the damage depth H based on the constant wave velocity value. According to the loosening zone theory of tunnel surrounding rock, areas with wave velocities less than the constant wave velocity value Vp0 are damage zones. Pores and cracks develop within these zones, and the wave velocity decreases. Areas with wave velocities greater than the constant wave velocity value Vp0 are strengthening zones. In these strengthening zones, high mining stresses compact the microscopic pores and cracks within the rock mass, leading to a slight increase in the measured wave velocity. The drilling depth for the damage zone is then determined as H = D1, with the strengthening zone being the drilling depth from D1 to D2.

[0039] like Figure 6 and Figure 7 As shown, in some embodiments of the present invention, determining the surrounding rock damage degradation range factor in step S4 includes: S41: Obtaining the lane radius; for example, if the lane is rectangular, the lane radius is the radius of the inscribed circle of the rectangle; for example, if the lane is arched, the lane radius is the radius r of the circle in which the arch is located.

[0040] S42: Determine the surrounding rock damage degradation range factor R based on the roadway radius and damage degradation depth. R=(Hr) / r, where H is the damage degradation depth, such as Figure 7 In the figure, H1 is the damage degradation range, and H2 is the strengthening range. The smaller the damage degradation range factor R of the tunnel surrounding rock, the smaller the damage range of the tunnel surrounding rock and the higher the stability of the tunnel surrounding rock.

[0041] The roadway surrounding rock damage and degradation range factor R = (Hr) / r. If the roadway is not damaged, then H = r and R = 0. The more severe the roadway damage, the larger the H value and the larger the R value. According to traditional mining theory, the maximum R value can reach about 5.

[0042] like Figure 8 As shown, in other embodiments of the present invention, determining the surrounding rock damage degradation factor in step S4 includes: S43: Obtain the wave velocity within the damage degradation depth range; Based on step S2, obtain the wave velocities Vp1, Vp2, Vp 3...... Vp n .

[0043] S44: Determine the surrounding rock damage factor d based on the constant wave velocity value and the wave velocity within the damage degradation depth range. d=(Vp0-Vp n ) / Vp0, Vp n is the wave velocity value at any measuring point within the damage degradation depth D1, and Vp0 is the above-mentioned constant wave velocity value. The larger the damage degradation factor d value, the more significant the rock mass damage degradation effect.

[0044] The larger the damage and degradation range, the greater the deformation and damage extent of the roadway surrounding rock. The greater the surrounding rock damage factor within the damage and degradation range, the more pronounced the surrounding rock degradation effect in the damage and degradation zone. These two data points indicate that the current roadway surrounding rock is severely deformed and damaged, requiring strengthened support, either by increasing the anchor support length, adding anchor cables, or increasing the anchor support density.

[0045] Continue to refer Figure 7 In other embodiments of the present invention, the drilling locations include the roadway roof and floor and the surrounding rocks on both sides. Holes are drilled on the roadway roof and floor and the surrounding rocks on both sides to monitor the damage and deterioration of the roadway roof and floor and the surrounding rocks on both sides.

[0046] In another optional embodiment of the present invention, the method for monitoring the degree of damage and degradation of surrounding rock in a roadway further includes determining the roadway support strength based on the surrounding rock damage and degradation range factor and the damage factor. In other words, the surrounding rock damage and degradation range factor and the damage factor provide guidance for roadway support. Targeted adjustments to roadway support strength in damaged and degraded areas can be made to improve roadway support strength, thereby enhancing roadway safety.

[0047] Furthermore, in other embodiments of the present invention, support strength includes support component length and support density. For example, if the support components are anchor rods and / or anchor cables, the anchor rod length and / or anchor cable length, as well as support density parameters such as the spacing and row spacing of the anchor rods and anchor cables, are determined based on the surrounding rock damage degradation range factor and the damage factor.

[0048] In addition, in an optional embodiment of the present invention, determining the tunnel support strength based on the surrounding rock damage degradation range factor and the damage factor includes: The length of the support component is greater than or equal to the damage deterioration depth; The larger the surrounding rock damage degradation range factor, the larger the damage factor and the greater the anchor support density.

[0049] The present invention determines the damage and deterioration depth H of the tunnel roof and floor and the surrounding rocks on both sides, thereby determining that the anchor cable length in the damaged and deteriorated area is greater than or equal to H, thereby achieving the purpose of anchoring the anchor cable in the stable rock formation.

[0050] When determining anchor bolt length and support density, the damage depth H1 and the damage factor d must be considered together. When the damage depth H is large and the damage factor d is small, it indicates extensive and severe damage to the surrounding rock mass. Therefore, a longer anchor bolt length and a higher anchor support density are required. Anchor bolts must be anchored in relatively stable rock formations to ensure high anchoring strength.

[0051] For example, when the surrounding rock's damage factor d is greater than or equal to 0.8, the surrounding rock enters a rapid failure phase. Therefore, it is necessary to determine the damage degradation depth range H1 for a damage factor d ≥ 0.8 and the anchor length to be greater than or equal to H1 to ensure that the anchor is anchored in a relatively stable rock mass. If the damage factor d is small, the anchor spacing is selected to be 0.7 to 0.9 meters. If the damage factor d is large, the anchor spacing is selected to be 1 to 1.2 meters.

[0052] Damage factor of surrounding rock damage deterioration d=(Vp0-Vp n ) / Vp0, Vp0 is the wave velocity of the surrounding rock in the deep undisturbed area, Vp n It is the wave velocity of the surrounding rock in the disturbance zone. Only the surrounding rock in the damage degradation range will be damaged, and the damage factor is less than 1. In the surrounding rock strengthening zone, d is greater than 1, while in the deep undisturbed area, d=1.

[0053] The depth of damaged and degraded drilling holes shall not exceed 5 times the radius of the tunnel, and the specific situation needs to be adjusted according to the actual engineering geological conditions.

[0054] The present invention also provides a system for monitoring the degree of damage and degradation of tunnel surrounding rock, including: a wave velocity detection module, a damage degradation depth confirmation module and a damage degradation degree calculation module. The wave velocity detection module obtains the wave velocity of the surrounding rock at different depths along the drilling depth direction; the damage degradation depth confirmation module determines the damage degradation depth of the surrounding rock based on the wave velocity; the damage degradation degree calculation module determines the surrounding rock damage degradation range factor and damage factor based on the damage degradation depth.

[0055] The wave velocity detection module is electrically connected to the damage degradation depth confirmation module, and the damage degradation degree calculation module is electrically connected to the damage degradation depth confirmation module.

[0056] The method for monitoring the degree of damage and deterioration of tunnel surrounding rock provided by the present invention determines the surrounding rock damage and deterioration range factor and damage factor by drilling holes in the tunnel surrounding rock and performing wave velocity detection in the borehole, and then monitors the surrounding rock damage and deterioration area, thereby achieving a comprehensive assessment of the tunnel surrounding rock, carrying out targeted support for the surrounding rock damage and deterioration area, improving the tunnel support effect, and reducing costs.

[0057] Furthermore, the system for monitoring the degree of damage and degradation of surrounding rocks of a roadway provided by the present invention also has the various advantages described above because it is equipped with the method for monitoring the degree of damage and degradation of surrounding rocks of a roadway as described above.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for monitoring the degree of damage and deterioration of surrounding rock in a roadway, characterized in that: include: Confirm the drilling position on the tunnel surrounding rock; Obtaining wave velocities at different depths of surrounding rock along the depth direction of the borehole; determining a damage and degradation depth of the surrounding rock based on the wave velocity; Based on the damage degradation depth, the surrounding rock damage degradation range factor and the damage factor are determined.

2. The method for monitoring the degree of damage and deterioration of surrounding rock in a roadway according to claim 1, characterized in that: The step of obtaining the wave velocity at different depths of the surrounding rock along the depth direction of the borehole comprises: Install the ultrasonic transmitting probe and the ultrasonic receiving probe on the conveying rod; The delivery rod is placed in the borehole, and the ultrasonic transmitting probe and the ultrasonic receiving probe are fitted to the inner wall of the borehole; The ultrasonic wave velocities at different depths of the borehole are obtained.

3. The method for monitoring the damage and deterioration degree of surrounding rock of a roadway according to claim 1, characterized in that: The determining of the damage and degradation depth of the surrounding rock based on the wave velocity includes: Plotting a graph of the wave velocity versus the detection depth; Determine the constant wave velocity value; The damage degradation depth is determined based on the constant wave velocity value.

4. The method for monitoring the damage and degradation degree of surrounding rock of a roadway according to any one of claims 1 to 3, characterized in that: The determination of surrounding rock damage degradation range factors includes: Get the lane radius; A surrounding rock damage degradation range factor is determined based on the roadway radius and the damage degradation depth.

5. The method for monitoring the degree of damage and deterioration of surrounding rock of a roadway according to claim 3, characterized in that: Determining the surrounding rock damage degradation factor includes: Obtaining the wave velocity within the damage degradation depth range; A surrounding rock damage factor is determined based on the constant wave velocity value and the wave velocity within the damage degradation depth range.

6. The method for monitoring the damage and degradation degree of surrounding rock in a roadway according to any one of claims 1 to 3, characterized in that: The drilling position includes the top and bottom plates of the tunnel and the surrounding rocks on both sides.

7. The method for monitoring the damage and degradation degree of surrounding rock in a roadway according to any one of claims 1 to 3, characterized in that: Also includes: Based on the surrounding rock damage degradation range factor and the damage factor, the tunnel support strength is determined.

8. The method for monitoring the degree of damage and deterioration of surrounding rock of a roadway according to claim 7, characterized in that: The support strength includes the length and support density of the support members.

9. The method for monitoring the damage and degradation degree of surrounding rock of a roadway according to claim 8, characterized in that: The determining of the tunnel support strength based on the surrounding rock damage degradation range factor and the damage factor includes: In the surrounding rock damage degradation range, the larger the factor, the larger the damage factor, the longer the length of the support member, and the greater the support density.

10. A system for monitoring the degree of damage and degradation of surrounding rock in a roadway, characterized in that: The method for monitoring the degree of damage and deterioration of surrounding rock of a roadway as claimed in any one of claims 1 to 9 comprises: Wave velocity detection module, which obtains the wave velocity at different depths of the surrounding rock along the depth direction of the borehole; a damage degradation depth confirmation module, which determines the damage degradation depth of the surrounding rock based on the wave velocity; The damage degradation degree calculation module determines the surrounding rock damage degradation range factor and the damage factor based on the damage degradation depth.

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