Tunnel geological axis continuous global detection method and system

Abstract

The invention provides a tunnel geological axis continuous global detection method and system, and the method comprises the steps: carrying out the sectional relay drilling along the tunnel axis in a non-tunnel face region of a tunnel through employing a miniaturized horizontal directional drilling machine, and achieving the full-length continuous detection of the tunnel geology of any length along the axis; electromagnetic wave radial detection equipment and sound wave radial detection equipment are adopted to carry out geological radial detection within a certain detection radius range around a drill hole, and surrounding rock geological global detection in a tunnel excavation area is achieved; ground stress in-situ testing equipment is used for carrying out ground stress in-situ testing through a horizontal irregular borehole stress relieving method, and accurate detection of surrounding rock stress on the tunnel axis is achieved; the rock strength is inversed by adopting parameters while drilling, the lithologic boundary is inversed based on a rock debris migration model, and the geological parameters and information of the non-coring surrounding rock are obtained. According to the invention, tunnel geological axis global refined detection is realized by means of segmented relay horizontal directional drilling and multi-dimensional surrounding rock space detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel drilling, in particular to a tunnel geological axis continuous global detection method and system. BACKGROUND

[0002] In tunnel engineering, the complexity of geological conditions directly affects the safety and stability of tunnel construction. More and more mountain tunnels and underwater tunnels are built in extreme environments such as great depth, high altitude, and glacier coverage. Traditional tunnel geological detection mainly uses vertical drilling and ground geophysical prospecting methods. For tunnels in extremely complex environments, drilling machines cannot reach the drilling position, and drilling is difficult to implement. Due to the large depth of the tunnel, ground geophysical prospecting methods are difficult to implement and have low precision. For general tunnels, even if limited vertical drilling can be performed, the geological information along the axis is discontinuous, and the geological information between vertical drillings relies on inference. Ultimately, tunnel construction faces the difficult problems of difficult geological information to find out and difficult engineering risks to control. At the same time, traditional tunnel geological detection methods are difficult to finely detect the surrounding rock geology of the tunnel, and it is difficult to obtain the ground stress parameters, the uniaxial compressive strength of the rock, and the rock layer interface, which relies on coring to determine, with high operation cost and low efficiency.

[0003] Therefore, there is an urgent need for a method that can realize continuous, global, and fine detection of the tunnel geological axis to improve the safety and construction efficiency of tunnel engineering. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide a tunnel geological axis continuous global detection method and system.

[0005] According to one aspect of the present application, a tunnel geological axis continuous global detection method is provided, which comprises: using a horizontal directional drilling machine to drill along the tunnel axis in stages in the non-tunnel face area of the tunnel to obtain a horizontal directional hole, thereby realizing continuous detection of the geological information of the tunnel along the entire axis; During each stage of drilling or after the drilling is completed, electromagnetic wave radial detection equipment and acoustic wave radial detection equipment are used to obtain the geological characteristics of the geological anomaly body within the radial range of the horizontal directional hole; During each stage of drilling or after the drilling is completed, in-situ ground stress testing equipment is used to carry out in-situ ground stress testing to obtain the ground stress data information of the surrounding rock along the tunnel axis; During each stage of drilling, the surrounding rock strength is inverted using the drilling parameters, the lithology boundary is inverted based on the horizontal directional drilling annulus cuttings transport model, and the surrounding rock state along the tunnel axis is inverted based on the surrounding rock strength and the lithology boundary; The continuous detection results of the tunnel geological information along the entire axis are obtained by combining the geological characteristics, the ground stress data information of the surrounding rock, and the surrounding rock state.

[0006] Optionally, the horizontal directional drilling machine is used to drill the horizontal directional hole along the tunnel axis in stages to realize continuous detection of the whole tunnel along the axis, and the method comprises the following steps: According to the tunnel construction scheme, the horizontal directional drilling section drilling distance is determined, the horizontal directional drilling machine type and parameters and the drilling tool facilities matched with the horizontal directional drilling machine are determined, and the drilling scheme is formulated; The horizontal directional drilling machine is used to drill the first-stage horizontal directional hole according to the drilling scheme from the set tunnel excavation opening, and after the first-stage horizontal directional hole drilling is completed, the first-stage tunnel excavation is carried out along the horizontal directional hole trajectory formed by the first-stage horizontal directional hole drilling; After the first-stage tunnel excavation is completed, the horizontal directional drilling machine is moved to the drilling machine parking place in the tunnel to repeat the horizontal directional hole section drilling, and the tunnel section excavation is carried out along the tunnel axis; The electromagnetic wave radial detection equipment, the acoustic wave radial detection equipment and the in-situ ground stress test equipment are installed on the horizontal directional drilling machine after each horizontal directional hole section drilling or at the end of the drilling to carry out the tunnel detection work, and the whole-line relay continuous drilling and test of the horizontal directional drilling machine along the tunnel axis direction are completed.

[0007] Optionally, the first-stage horizontal directional hole drilling comprises the following steps: when the tunnel is not excavated, the horizontal directional drilling machine is used to drill along the tunnel axis at the set tunnel excavation opening to obtain the horizontal directional hole, and the drilling is stopped after a preset drilling distance is reached, wherein the preset drilling distance is equal to the horizontal directional drilling section drilling distance.

[0008] Optionally, the horizontal directional hole section drilling comprises the following steps: the section drilling trajectory of the horizontal directional drilling machine is planned, the section drilling trajectory comprises the hole opening straight-line drilling section, the increasing-inclination section, the decreasing-inclination section and the along-tunnel-axis drilling section which are connected in sequence, wherein the hole opening straight-line drilling section is parallel to the along-tunnel-axis drilling section, the along-tunnel-axis drilling section is collinear with the tunnel axis, the distance of the section drilling trajectory along the tunnel axis direction is equal to the horizontal directional drilling section drilling distance, and the horizontal directional drilling machine is used to drill along the section drilling trajectory to obtain the horizontal directional hole, wherein the position of the along-tunnel-axis drilling section formed by the horizontal directional hole section drilling coincides with the position of the horizontal directional hole formed by the first-stage horizontal directional hole drilling.

[0009] Optionally, the drilling machine parking place in the tunnel is an emergency parking area behind the working area of the cross tunnel or the working face; If the cross tunnel excavation is carried out simultaneously during the tunnel excavation, the horizontal directional drilling machine is moved to the middle part of the cross tunnel in the tunnel; If the horizontal directional drilling machine does not perform the horizontal hole excavation during the tunnel excavation process, the horizontal directional drilling machine is moved to the emergency parking area behind the working area of the tunnel face.

[0010] Optionally, the geological features of the geological anomaly body within the radial setting range of the horizontal directional hole are obtained by using the electromagnetic wave radial detection equipment and the acoustic wave radial detection equipment, including: During each stage of drilling or after the drilling is completed, the electromagnetic wave radial detection equipment is started, and the accurate positioning of the geological anomaly body within the radial setting range of the horizontal directional hole and the corresponding image are obtained by using the electromagnetic wave radial detection equipment; During each stage of drilling or after the drilling is completed, the acoustic wave radial detection equipment is started, and the three-dimensional stereoscopic recognition data of the geological anomaly body within the radial setting range of the horizontal directional hole are obtained by using the acoustic wave radial detection equipment; Combined with the positioning, image and three-dimensional stereoscopic recognition data of the geological anomaly body, the geological features within the tunnel drilling section formed by this stage of drilling are obtained.

[0011] Optionally, the in-situ ground stress test includes: After each stage of drilling or after the drilling is completed, the in-situ ground stress test equipment is started to perform in-situ ground stress test: A test area is selected on the hole wall of the horizontal directional hole, three test points are selected in the test area in turn, the strain of the hole wall of each test point in the circumferential direction, radial direction and tangential direction is obtained by using the in-situ ground stress test equipment, and the far-field three-directional ground stress of the test area is obtained based on the strain measurement results of the hole wall of the three test points in the circumferential direction, radial direction and tangential direction, and combined with the horizontal irregular hole wall strain-far-field stress analytical model based on complex variable function. A plurality of test areas are selected, and the in-situ ground stress test is repeatedly performed to complete the in-situ ground stress measurement of the tunnel drilling section formed by this stage of drilling, and the ground stress data information of the surrounding rock on the tunnel axis is obtained.

[0012] Optionally, the strain of the hole wall of each test point in the circumferential direction, radial direction and tangential direction obtained by using the in-situ ground stress test equipment includes: The initial strain of the test point is obtained by using the in-situ ground stress test equipment; The rock sample around the test point is cut by using the in-situ ground stress test equipment, and the strain change of the test point hole wall core before and after cutting is collected; The strain of the test point hole wall in the circumferential direction, radial direction and tangential direction is obtained according to the strain change of the test point hole wall core before and after cutting, and the strain measurement of the test point is completed.

[0013] Optionally, the surrounding rock strength is inversed by using the drilling parameter, the lithology boundary is inversed based on the horizontal directional drilling annulus cuttings transport model, and the surrounding rock nature on the tunnel axis is inversed combined with the surrounding rock strength and the lithology boundary, including: In each drilling process, real-time acquisition of drilling parameters is performed, the drilling parameters including drilling pressure, drilling bit rotation speed, torque, drilling bit and drilling tool size, mud flow rate and mechanical drilling speed parameter changes; Combined with the drilling trajectory and drilling parameters of the horizontal directional hole, the mechanical specific energy of the horizontal directional drilling rig is obtained, the rock strength model is constructed based on the mechanical specific energy, and the rock strength model is used to obtain the surrounding rock strength along the horizontal directional hole trajectory; According to the drilling parameters and the horizontal directional drilling annulus cuttings migration model, the cuttings position, lithology boundary, and spatial distribution of surrounding rock types and physical properties along the tunnel axis are obtained; Combined with the surrounding rock strength and the spatial distribution of the surrounding rock types, the surrounding rock properties along the tunnel axis are inverted.

[0014] According to another aspect of the present application, a tunnel geological axis continuous global detection device is provided, comprising: A horizontal directional drilling rig, and electromagnetic wave radial detection equipment, acoustic wave radial detection equipment and in-situ ground stress testing equipment installed on the horizontal directional drilling rig, and a surrounding rock state inversion module and a tunnel detection result extraction module, wherein: The horizontal directional drilling rig is used to drill in stages along the tunnel axis in the non-tunnel face area of the tunnel to obtain a horizontal directional hole, so as to realize continuous detection of any tunnel geology along the axis; The electromagnetic wave radial detection equipment and the acoustic wave radial detection equipment are used to obtain the geological characteristics of the geological anomaly body within the radial setting range of the horizontal directional hole; The in-situ ground stress testing equipment is used to carry out in-situ ground stress testing to obtain surrounding rock ground stress data information on the tunnel axis; The surrounding rock state inversion module is used to invert the surrounding rock strength using the drilling parameters, invert the lithology boundary based on the horizontal directional drilling annulus cuttings migration model, and invert the surrounding rock state of the tunnel axis in combination with the surrounding rock strength and the lithology boundary; The tunnel detection result extraction module is used to obtain the continuous detection results of the tunnel geology along the axis in combination with the geological characteristics, the surrounding rock ground stress data information and the surrounding rock state.

[0015] Compared with the prior art, the present application has at least one of the following beneficial effects: 1、The application adopts a segmented relay type horizontal directional drilling method, which can realize continuous drilling of the surrounding rock along the tunnel axis of any length and ensure that the information of the whole tunnel is complete and not missed; electromagnetic wave radial detection equipment and acoustic wave radial detection equipment are used to realize the drilling radial remote detection technology, realize the detection of geological information within a certain test radius around the drilling, and completely cover the tunnel excavation operation area, breaking through the technical limitations of the traditional drilling detection "one hole view"; the in-situ stress testing equipment is used to realize the in-situ stress testing technology of the stress relief of the horizontal irregular drilling, and realize the accurate and advanced detection of the stress of the surrounding rock of the tunnel; the drilling parameters and drilling cuttings are combined with the rock strength inversion model based on mechanical specific energy and the horizontal directional drilling annulus cuttings migration model to comprehensively analyze the characteristics and spatial distribution of the surrounding rock and accurately depict the spatial behavior of the surrounding rock. The segmented relay horizontal directional drilling and multi-dimensional surrounding rock space detection means are used to realize continuous, global and fine monitoring and analysis of the tunnel geological axis, and to provide an efficient, accurate and comprehensive method system for the advanced geological information detection of tunnel engineering construction.

[0016] 2、The segmented relay type horizontal directional drilling method adopted by the application plans a smooth curve flexible drilling trajectory including the orifice straight drilling section, the build-up section, the drop section and the along-tunnel axis drilling section according to the drilling rig guiding ability and the drilling tool characteristics in each drilling process, ensures efficient and stable drilling of the drilling rig, and does not affect the normal excavation of the working face, can realize continuous drilling of the surrounding rock along the tunnel axis of any length, and ensures that the information of the whole tunnel is complete and not missed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Other features, objects and advantages of the application will become more apparent through reading the following detailed description of non-limiting embodiments, made with reference to the following drawings: Figure 1 It is a horizontal directional drilling rig trajectory schematic diagram when a tunnel with a cross tunnel is excavated in the embodiment of the application; Figure 2 It is a horizontal directional drilling rig trajectory schematic diagram when a tunnel without a cross tunnel is excavated in the embodiment of the application; Figure 3 It is a structural schematic diagram of the electromagnetic wave radial detection equipment in the embodiment of the application; Figure 4 It is a structural schematic diagram of the acoustic wave radial detection equipment in the embodiment of the application; Figure 5 It is a schematic diagram of the in-situ stress testing equipment in the embodiment of the application, wherein (a) is a structural schematic diagram of the in-situ stress testing equipment, (b) is a structural schematic diagram of the stress testing module, (c) is a structural schematic diagram of the strain sensing device, and (d) is a layout schematic diagram of the testing points; Figure 6 It is a flowchart of the inversion of the surrounding rock characteristics by the drilling parameters in the embodiment of the application.

[0018] In the figure: 101 - horizontal directional drilling machine; 102 - horizontal directional hole; 1021 - hole mouth straight drilling section; 1022 - build-up section; 1023 - drop-off section; 1024 - drilling section along tunnel axis; 103 - tunnel surrounding rock wall; 104 - tunnel; 105 - cross tunnel; 106 - tunnel axis; 107 - first tunneling face; 108 - sectional tunneling face; 109 - stratum rock mass; 110 - emergency stop zone; 200 - electromagnetic wave radial detection equipment; 201 - joint; 202 - transmitting end battery module; 203 - transmitting control module; 204 - radar transceiving antenna module; 205 - signal receiving control module; 206 - receiving end battery module; 300 - sound wave radial detection equipment; 301 - sound wave source module; 302 - switch module; 303 - energy storage capacitor module; 304 - inverter control module; 305 - charging control module; 306 - communication control module; 307 - data acquisition module; 400 - in-situ ground stress testing equipment; 401 - ground stress testing module; 4011 - mechanical arm; 4012 - rock sample ring cutting device; 4013 - strain sensing device; 4014 - rotating arm; 4015 - guide rail; 4016 - three-way strain gauge sensor; 402 - hydraulic drive module; 403 - control and data transmission module; 501 - hole wall; 502 - testing point. DETAILED DESCRIPTION

[0019] The present application will be described in detail below with specific embodiments. The following examples will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, which are within the scope of the present application. The parts not described in detail in the following examples can be implemented using existing technology.

[0020] In the description of embodiments of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0021] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0022] In the description of the embodiments of the present application, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified. In the present application, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect", "fix" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In the embodiments of the present application, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally also includes other steps or units inherent to the process, method, product or device.

[0024] At present, the traditional tunnel geological exploration method is difficult to finely and continuously explore the surrounding rock geology of the tunnel, and the operation cost is high and the efficiency is low. Based on the above problems, the tunnel geological axis continuous global exploration method is provided to solve the above problems.

[0025] The tunnel geological axis continuous global exploration method provided in the embodiments of the present application, the method comprises: S1, a horizontal directional drilling machine 101 is used to drill along the tunnel axis in stages in the tunnel non-face area to obtain a horizontal directional hole 102, so as to realize continuous exploration of any tunnel geology along the axis full length; Wherein, the horizontal directional drilling machine 101 can be provided with a radial detection equipment and a ground stress in-situ test equipment 400, the radial detection equipment includes an electromagnetic wave radial detection equipment 200 and a sound wave radial detection equipment 300; S2, in each stage drilling process in S1 or after the drilling is completed, the electromagnetic wave radial detection equipment 200 and the sound wave radial detection equipment 300 are used to obtain the geological characteristics of the geological anomaly body within the radial range of the horizontal directional hole 102; S3, in each stage drilling process in S1 or after the drilling is completed, the ground stress in-situ test equipment 400 is used to carry out ground stress in-situ test to obtain the surrounding rock stress data information on the tunnel axis 106; S4, in each stage drilling process in S1, the surrounding rock strength is inversed by using the while-drilling parameter, the lithology boundary is inversed based on the horizontal directional drilling annulus cuttings migration model, and the tunnel axis surrounding rock state is inversed in combination with the surrounding rock strength and the lithology boundary. S5, in combination with the geological features of S2, the surrounding rock stress data information of S3 and the surrounding rock behavior of S4, obtaining the tunnel geological continuous detection results along the axis full length, wherein the tunnel geological continuous detection results along the axis full length include the geological detection results within the preset detection radius range of the drill hole and the geological detection results along the drill hole.

[0026] The tunnel geological axis continuous global detection method implemented by the above embodiments S1-S5 of the present application realizes continuous, global and fine detection of the tunnel geology by combining the miniaturized horizontal directional drilling machine, the radial detection equipment, the in-situ stress testing equipment and the while-drilling parameter inversion technology in the tunnel. Of course, the above embodiments are an implementation manner of the present application, and steps S2-S4 do not require strict execution in the above order. In other embodiments, S2-S4 can be performed without sequence or in parallel during each stage of drilling.

[0027] In some specific embodiments of the present application, in order to effectively realize the continuous detection of the tunnel geology along the axis full length, step S1 adopts the miniaturized horizontal directional drilling machine to drill along the tunnel axis in stages in the non-tunnel face area of the tunnel, which can further include: S11, determining the horizontal directional drilling section drilling distance D according to the tunnel construction scheme and progress arrangement, determining the horizontal directional drilling machine type, the horizontal directional drilling machine parameters and the drilling tool facilities matched with the horizontal directional drilling machine, formulating the drilling scheme and selecting the tunnel excavation opening; S12, using the horizontal directional drilling machine 101 to start the first stage horizontal directional hole drilling from the selected tunnel excavation opening according to the drilling scheme, and when the first stage horizontal directional hole drilling is completed, carrying out the first stage tunnel excavation along the horizontal directional hole trajectory formed by the first stage horizontal directional hole drilling, wherein the first tunneling face 107 of the first stage tunnel excavation, the tunnel surrounding rock wall surface 103 of the tunnel drilling section excavated and the trajectory of the horizontal directional hole 102 are shown with reference to Figure 1 ; S13, after the first stage tunnel excavation is completed, moving the horizontal directional drilling machine 101 to the drilling machine parking place in the tunnel, repeating the horizontal directional hole section drilling, and carrying out the tunnel section excavation along the tunnel axis at the same time. Specifically, since the horizontal directional drilling speed is much faster than the tunnel excavation speed, the tunnel excavation can be carried out at the same time during the horizontal directional hole section drilling. The horizontal directional drilling and the tunnel geological detection results can be used to guide the design and construction of the tunnel section. The section tunneling face 108 of the tunnel section excavation is shown with reference to Figure 1 ; S14, installing the electromagnetic radial detection equipment 200, the acoustic radial detection equipment 300 and the in-situ stress testing equipment 400 on the drill rod of the horizontal directional drilling rig 101 at each time of the horizontal directional hole segment drilling or after the drilling, carrying out the tunnel detection work, and completing the full-line relay continuous drilling and testing of the horizontal directional drilling rig along the tunnel axis direction.

[0028] The above embodiments of the present application adopt the segment relay horizontal directional drilling method, a smooth horizontal directional hole trajectory is planned according to the drilling rig guiding ability and the drilling tool characteristics in each drilling process, the horizontal directional hole segment drilling is repeated for multiple times and the tunnel segment excavation is carried out in the stratum rock mass 109, the full-line relay continuous drilling and excavation of the horizontal directional drilling rig along the tunnel axis direction is completed, and the problem that the traditional drilling rig cannot continuously detect in the long tunnel is solved. Of course, the above embodiment is one implementation manner of the present application, and the step S14 does not require to be strictly executed according to the above sequence, and in other embodiments, the S14 can be carried out without sequence or in parallel in each horizontal directional hole segment drilling process.

[0029] In some specific embodiments of the present application, the first stage horizontal directional hole drilling includes: when the tunnel is not excavated, a horizontal directional drilling rig 101 is used to drill along the tunnel axis to obtain a horizontal directional hole 102 at a set tunnel excavation opening, and the drilling is stopped after a preset drilling distance is reached, and the preset drilling distance is equal to the horizontal directional drilling segment drilling distance D.

[0030] In some specific embodiments of the present application, the horizontal directional hole segment drilling includes: a segment drilling trajectory of the horizontal directional drilling rig 101 is planned according to the drilling rig guiding ability and the drilling tool characteristics, the segment drilling trajectory includes a hole opening straight-line drilling section 1021, an inclination increasing section 1022, an inclination decreasing section 1023 and a tunnel axis drilling section 1024 connected in sequence, the hole opening straight-line drilling section 1021 is parallel to the tunnel axis drilling section 1024, the tunnel axis drilling section 1024 is collinear with the tunnel axis 106, the distance of the segment drilling trajectory along the tunnel axis direction is equal to the horizontal directional drilling segment drilling distance D, and the horizontal directional drilling rig 101 is used to drill along the segment drilling trajectory to obtain the horizontal directional hole 102, wherein the tunnel axis drilling section 1024 formed by the horizontal directional hole segment drilling in the S14 is coincided with the position of the horizontal directional hole 102 formed by the first stage horizontal directional hole drilling (that is, it is ensured that the tunnel axis drilling section 1024 of the present segment is perfectly connected with the tunnel axis drilling section 1024 of the previous segment), that is, the tunnel axis drilling section 1024 formed by each horizontal directional hole segment drilling is on the same straight line with the horizontal directional hole 102 formed by the first stage horizontal directional hole drilling.

[0031] In the above embodiments of the present application, the inclination increasing section 1022 and the inclination decreasing section 1023 in the horizontal directional drilling process have the following meanings: Build-up section: refers to a section in the process of horizontal directional drilling, in which the angle between the drilling trajectory and the drilling direction of the drill rod increases with the increase of drilling footage, and is used to make the segmented drilling trajectory close to the tunnel axis 106.

[0032] Drop-off section: refers to a section in the process of horizontal directional drilling, in which the angle between the drilling trajectory and the drilling direction of the drill rod decreases with the increase of drilling footage, and appears after the build-up section, and is used to connect the segmented drilling trajectory and the section along the tunnel axis 1024.

[0033] Wherein, the orifice straight drilling section 1021, the build-up section 1022, the drop-off section 1023 and the section along the tunnel axis 1024 are sequentially connected end to end and smoothly transitioned, as shown in Figure 1 and Figure 2 R is the radius of curvature of the segmented drilling trajectory in the process of horizontal directional drilling, and the trajectory curvature radius can be 180m~900m.

[0034] The above embodiments of the present application plan a smooth curve flexible drilling trajectory including an orifice straight drilling section, a build-up section, a drop-off section and a section along the tunnel axis in each drilling process, ensure efficient and stable drilling of the drilling rig, and do not affect the normal excavation of the working face, can realize continuous drilling of the tunnel axis surrounding rock of random length, and ensure the completeness of the tunnel information.

[0035] In some specific embodiments of the present application, before each horizontal directional hole is segmented drilled, the horizontal directional drilling rig 101 is moved to the drilling rig parking place in the tunnel 104, and the drilling rig parking place in the tunnel adopts the cross tunnel 105 or the emergency parking area 110 behind the working area of the working face; As shown in Figure 1 If the cross tunnel is excavated during the tunnel excavation process, the horizontal directional drilling rig 101 is moved to the middle of the cross tunnel 105 in the tunnel; As shown in Figure 2 If the cross tunnel is not excavated during the tunnel excavation process, the horizontal directional drilling rig 101 is moved to the emergency parking area 110 behind the working area of the working face.

[0036] In some specific embodiments of the present application, in order to effectively obtain the geological characteristics of the geological anomaly body within the radial setting range of the horizontal directional hole, and realize the full-area exploration of the surrounding rock geology in the tunnel excavation area, step S2 uses the electromagnetic wave radial detection equipment 200 and the acoustic wave radial detection equipment 300 to obtain the geological characteristics of the geological anomaly body within the radial setting range of the horizontal directional hole during each stage of drilling or after the drilling is completed, which can further include: S21, during or after each stage of drilling, starting the electromagnetic wave radial detection equipment 200, using the electromagnetic wave radial detection equipment 200 to obtain accurate positioning of the geological anomaly body within the radial setting range of the horizontal directional aperture and the corresponding image, wherein the detection setting range of the electromagnetic wave radial detection equipment 200 is 5m-15m; S22, during or after each stage of drilling, starting the acoustic wave radial detection equipment 300, using the acoustic wave radial detection equipment 300 to obtain three-dimensional stereoscopic recognition data of the geological anomaly body within the radial setting range of the horizontal directional aperture, wherein the detection setting range of the acoustic wave radial detection equipment 300 is 10m-30m; S23, combining the positioning of the geological anomaly body in S21, the image and the three-dimensional stereoscopic recognition data in S22, obtaining the geological features within the tunnel drilling section formed by the stage of drilling.

[0037] The above embodiments of the present application adopt the borehole radial far exploration technology, and the electromagnetic wave radial detection equipment and the acoustic wave radial detection equipment can realize geological information exploration within a certain test radius around the borehole, completely cover the tunnel excavation operation area, and break through the technical limitations of the traditional borehole exploration "one hole view". Further, the combination of the electromagnetic wave radial detection equipment and the acoustic wave radial detection equipment can make up for the shortcomings of single detection mode, and realize multi-dimensional and high-precision geological exploration in the tunnel excavation area.

[0038] In some specific embodiments of the present application, referring to Figure 3 The electromagnetic wave radial detection equipment 200 includes, from front to back, a joint 201, a transmitting end battery module 202, a transmitting control module 203, a radar transceiver antenna module 204, a signal receiving control module 205 and a receiving end battery module 206; wherein the joint 201 is used to connect the drill pipe or other drilling tools; the transmitting end battery module 202 is used to provide power supply for the transmitting control module 203 and the radar electromagnetic wave transmission; the transmitting control module 203 is used to control the radar electromagnetic wave transmission and adjust the transmission parameters; the radar transceiver antenna module 204 is used for radar electromagnetic wave transmission and radar reflection wave reception; the signal receiving control module 205 is used for radar reflection wave signal reception, recording, noise reduction, decoding analysis and result transmission or storage; the receiving end battery module 206 is used to provide power supply for the signal receiving control module 205 and the radar reflection wave reception.

[0039] Specifically, the electromagnetic wave radial detection equipment 200 completes the accurate positioning and high-resolution imaging of the geological anomaly body in the radial setting range of the horizontal directional aperture by multi-frequency electromagnetic wave transmission, reception, signal separation, and imaging inversion. Among them, the transmitting end battery module 202, the transmission control module 203, and the radar transceiver antenna module 204 complete the electromagnetic signal transmission, the radar transceiver antenna module 204, the signal receiving control module 205, and the receiving end battery module 206 complete the electromagnetic signal reception, and the signal receiving control module 205 also completes the signal separation and imaging inversion functions.

[0040] In some embodiments of the present application, with reference to Figure 4 , the acoustic wave radial detection equipment 300 includes, connected from front to back in order, an acoustic wave source module 301, a switch module 302, an energy storage capacitor module 303, an inverter control module 304, a charging control module 305, a communication control module 306, and a data acquisition module 307; wherein the acoustic wave source module 301 is used to generate an active acoustic wave pulse source signal; the switch module 302 is used to control whether the electric energy in the energy storage capacitor module 303 is released and transmitted to the acoustic wave source module 301; the energy storage capacitor module 303 is used to store pulse energy to provide the acoustic wave source module 301 with the energy required for acoustic wave pulse excitation; the inverter control module 304 is used to convert the direct current power provided by the power supply into high-frequency alternating current and store it in the energy storage capacitor module 303; the charging control module 305 is used to control the current input time and input parameters of the inverter control module 304; the communication control module 306 is used to control the signal parameter transmission of the acoustic wave radial detection equipment; and the data acquisition module 307 is used for acoustic wave reflection wave signal reception, storage, and analysis.

[0041] Specifically, the acoustic wave radial detection equipment 300 completes the high-precision three-dimensional identification of the geological anomaly body in the radial setting range of the horizontal directional aperture by wide-band acoustic wave transmission, mode waveform identification, adaptive filtering, and imaging inversion. The acoustic wave source module 301, the switch module 302, the energy storage capacitor module 303, the inverter control module 304, the charging control module 305, and the communication control module 306 complete the wide-band acoustic wave transmission, and the data acquisition module 307 completes the mode waveform identification, adaptive filtering, and imaging inversion functions.

[0042] In some embodiments of the present application, in order to effectively obtain the surrounding rock geostress data information on the tunnel axis and realize accurate detection of the surrounding rock stress on the tunnel axis, step S3 uses the in-situ geostress testing equipment 400 to carry out in-situ geostress testing by the horizontal irregular borehole stress relief method during each drilling process or after drilling is completed, which can further include: S31, selecting a test area on the hole wall 501 of the horizontal directional hole, selecting three test points 502 in the test area in sequence, using the in-situ ground stress testing equipment 400 to obtain the circumferential, radial and tangential strains of the hole wall of each test point 502, and obtaining the far-field three-dimensional ground stress of the test area according to the circumferential, radial and tangential strain measurement results of the three test points 502 and in combination with the horizontal irregular hole wall strain-far-field stress analytical model based on complex variable function; S32, selecting multiple test areas, repeatedly performing the in-situ ground stress test of S31, completing the in-situ ground stress measurement of the tunnel drilling section formed in this stage of drilling, and obtaining the ground stress data information of the surrounding rock on the tunnel axis.

[0043] In S31 of the above embodiments of the present application, the circumferential, radial and tangential strains of the hole wall of each test point are obtained by using the in-situ ground stress testing equipment 400, which includes: S311, using the in-situ ground stress testing equipment 400 to obtain the initial strain of the test point 502; S312, using the in-situ ground stress testing equipment 400 to cut the rock sample around the test point 502, and collecting the strain change of the hole wall core before and after cutting; S313, obtaining the circumferential, radial and tangential strains of the hole wall of the test point according to the strain change of the hole wall core before and after cutting, and completing the strain measurement of the test point 502.

[0044] In the above embodiments of the present application, the in-situ ground stress testing technology for stress solution of horizontal irregular hole is realized by using the in-situ ground stress testing equipment, and the accurate advanced detection of the ground stress of the surrounding rock of the tunnel is realized.

[0045] In some specific embodiments of the present application, with reference to Figure 5 (a)- Figure 5 (c) in the present application, the in-situ ground stress testing equipment 400 includes, from front to back, a ground stress testing module 401, a hydraulic drive module 402 and a control and data transmission module 403, wherein: The in-situ geostress testing device 400 comprises a geostress testing module 401, a hydraulic drive module 402 and a control and data transmission module 403. The geostress testing module 401 is used to complete the measurement of the core strain of the hole wall of the test point, and comprises a mechanical leaning arm 4011, a rock sample ring cutting device 4012, a strain sensing device 4013, a rotating arm 4014 and a guide rail 4015. The mechanical leaning arm 4011 is connected with the shell of the geostress testing module 401. The rock sample ring cutting device 4012 is movably connected to the guide rail 4015 through the rotatable rotating arm 4014. The guide rail 4015 is parallel to the radial direction of the horizontal directional wellbore, so that the rock sample ring cutting device 4012 can perform radial expansion and contraction relative to the horizontal directional wellbore, and the rock sample ring cutting device 4012 itself can also perform rotary motion. The strain sensing device 4013 is arranged at the center of the rock sample ring cutting device 4012 and can independently move. A three-way strain rosette sensor 4016 is attached to the strain sensing device 4013. After the mechanical leaning arm 4011 is opened, the strain sensing device 4013 is extended to tightly adhere to the hole wall 501 and the hole wall rock. The rock sample ring cutting device 4012 can be extended, rotated and recovered to cut the rock sample. The mechanical leaning arm 4011 is opened to provide a reaction force for the rock sample ring cutting device 4012 and the strain sensing device 4013. The rock sample ring cutting device 4012 and the strain sensing device 4013 are installed in the opposite direction of the mechanical leaning arm 4011, so that the rock sample ring cutting device 4012 and the strain sensing device 4013 can tightly adhere to the hole wall 501. The rock sample ring cutting device 4012 is used to cut the hole wall rock, and the strain sensing device 4013 is used to test the strain change of the rock before and after the ring cutting.

[0046] The hydraulic drive module 402 is connected with the mechanical leaning arm 4011, the rock sample ring cutting device 4012, the strain sensing device 4013 and the rotating arm 4014, and is used to drive the mechanical leaning arm 4011 to rotate, the rock sample ring cutting device 4012 to rotate, and the rotating arm 4014 to drive the rock sample ring cutting device 4012 to extend and retract, and the strain sensing device 4013 to extend and retract, thereby providing power for the geostress testing module 401 to complete the core strain test action of the hole wall of the test point. The hydraulic drive module 402 and the three-way strain rosette sensor 4016 are connected with the control and data transmission module 403, and are used to control the geostress testing module 401 to complete a series of core strain test actions of the hole wall of the test point, process and transmit the strain data obtained by the test. For example, the in-situ geostress testing device 400 is used to perform in-situ geostress testing, which comprises the following steps: Single test point strain measurement: the mechanical arm 4011 is opened to make the in-situ ground stress test equipment 400 close to the hole wall of the horizontal directional hole, a test point on the hole wall is selected as a test point, the strain sensing device 4013 is extended to close to the test point hole wall, the initial strain of the test point is calibrated, the rock sample ring cutting device 4012 is extended, the rock sample ring cutting device 4012 is rotated and cut the rock sample to a certain depth and then retracted, the strain changes of the test point hole wall before and after the core cutting are obtained, and the strain measurement of the test point is completed; Second test point strain measurement: the drill pipe connected with the in-situ ground stress test equipment 400 is moved forward by a preset distance along the tunnel axis, and is rotated by a certain angle in a preset direction, and the above single test point strain measurement is repeated to complete the strain measurement of the second test point; Third test point strain measurement: the drill pipe connected with the in-situ ground stress test equipment 400 is continuously moved forward by a preset distance along the tunnel axis, and is rotated by a certain angle in a preset direction, and the above single test point strain measurement is repeated to complete the strain measurement of the third test point.

[0047] In the above embodiments of the present application, the preset distance range of the in-situ ground stress test equipment 400 moving forward along the tunnel axis is 1m-3m, the preset direction rotation means clockwise or counterclockwise rotation along the drill pipe, and the angle rotation range is 110°-130°. During the second test point and third test point testing, the same direction rotation is maintained, so that the azimuth angle of the three test points is about 120°, as shown in (d) of FIG. 6. Figure 5 The movement and rotation are realized by moving or twisting the drill pipe. The three test points are all in a test area, and the far-field three-dimensional ground stress of the test area can be obtained according to the strain measurement results of the three test points and in combination with the horizontal irregular hole wall strain-far-field stress analytical model based on complex variable function.

[0048] In order to obtain the far-field three-dimensional ground stress of different test areas, the in-situ ground stress test equipment 400 can be continuously moved forward along the tunnel axis, and the distance of each movement is greater than 10m. After the movement is completed, the strain measurement of three test points is carried out in each test area (i.e. three test points are selected in each test area, and the strain measurement of each test point is carried out once), and then the in-situ ground stress measurement of the tunnel drilling section in each drilling process is completed, and the ground stress data information of the surrounding rock on the tunnel axis is obtained.

[0049] In some specific embodiments of the present application, in order to effectively invert the tunnel axis surrounding rock state and realize the coring-free surrounding rock geological parameter and information acquisition, in step S4, the surrounding rock strength is inverted while drilling, the lithology boundary is inverted based on the horizontal directional drilling annulus cuttings transport model, and the tunnel axis surrounding rock state is inverted in combination with the surrounding rock strength and lithology boundary.Figure 6 For the process of inversed surrounding rock characteristics in the embodiment of the present application, refer to Figure 6 As shown in the figure, step S4 can further include: S41, in the process of each drilling hole, real-time acquisition of the while-drilling parameters, including the drilling pressure, the rotary speed of the drill bit, the torque, the drill bit and drill size, the mud flow rate and the mechanical drilling speed parameter changes; S42, combined with the drilling trajectory and the while-drilling parameters of the horizontal directional hole, the mechanical specific energy of the horizontal directional drilling rig is obtained, the rock strength model is constructed based on the mechanical specific energy, and the rock strength along the horizontal directional hole trajectory is obtained by using the rock strength model; S43, according to the while-drilling parameters and the horizontal directional drilling annular cuttings transport model, the cuttings position, the lithology boundary, and the spatial distribution of the surrounding rock type and the physical characteristics along the tunnel axis are obtained, wherein the horizontal directional drilling annular cuttings transport model can calculate the transport time and transport distance of the cuttings according to the while-drilling parameters, so as to determine the specific position of the cuttings in the drilling hole, and realize the logging cuttings identification; S44, combined with the rock strength and the spatial distribution of the surrounding rock type, the surrounding rock characteristics along the tunnel axis are inversed.

[0050] In the above embodiment of the present application, the while-drilling parameters and the drilling cuttings are used, combined with the rock strength inversion model based on the mechanical specific energy and the cuttings horizontal directional drilling annular cuttings transport model, the surrounding rock characteristics and the spatial distribution are comprehensively analyzed, and the spatial surrounding rock nature is accurately described.

[0051] Based on the same inventive concept, another embodiment of the present application provides a tunnel geological axis continuous full-domain detection system, which comprises a horizontal directional drilling rig 101, electromagnetic wave radial detection equipment 200, acoustic wave radial detection equipment 300 and in-situ ground stress test equipment 400 installed on the horizontal directional drilling rig 101, and a surrounding rock nature inversion module and a tunnel detection result extraction module, wherein: The horizontal directional drilling rig 101 is used to drill the horizontal directional hole in the non-tunnel face area along the tunnel axis in stages to realize the continuous detection of the arbitrary tunnel geology along the axis full length; The electromagnetic wave radial detection equipment 200 and the acoustic wave radial detection equipment 300 are used to obtain the geological characteristics of the geological anomaly body within the radial setting range of the horizontal directional hole; The in-situ ground stress test equipment 400 is used to carry out the in-situ ground stress test to obtain the surrounding rock ground stress data information on the tunnel axis; The surrounding rock nature inversion module is used to inverse the surrounding rock strength by using the while-drilling parameters, to inverse the lithology boundary based on the horizontal directional drilling annular cuttings transport model, and to inverse the surrounding rock nature of the tunnel axis combined with the surrounding rock strength and the lithology boundary; The tunnel detection result extraction module is configured to obtain continuous detection results of the tunnel geology along the axis of the whole length by combining geological features, surrounding rock ground stress data information and surrounding rock behavior.

[0052] In summary, the tunnel geology axis continuous global detection method provided by the embodiments of the present application realizes continuous, global and fine detection of tunnel geology by combining a miniaturized horizontal directional drilling machine, radial detection equipment, ground stress in-situ test equipment and while-drilling parameter inversion technology, using segmented relay horizontal directional drilling and multi-dimensional surrounding rock space detection means, which helps to form a transparent tunnel geology, is suitable for general tunnel engineering, and is particularly suitable for long and large tunnel engineering in extremely complex environments. The present application can realize continuous, global and fine monitoring and analysis of the tunnel geology axis, and provides an efficient, accurate and comprehensive method system for advanced detection of geological information for tunnel engineering construction.

[0053] The above describes some specific embodiments of the present application. It should be understood that the present application is not limited to the above specific embodiments, and various modifications or changes can be made by those skilled in the art within the scope of the claims, which does not affect the essential content of the present application. The above preferred features can be combined in any combination without conflict.

Claims

1. A method for tunnel geological axis continuous global detection, characterized in that, The application relates to a tunnel geological continuous detection method along an axis. The method comprises the following steps: a horizontal directional drilling machine is used to drill a horizontal directional hole along the tunnel axis in a relay mode in a tunnel non-face region to realize continuous detection of the tunnel geological along the axis; during or after each stage of drilling, electromagnetic wave radial detection equipment and acoustic wave radial detection equipment are used to obtain the geological characteristics of a geological anomaly body within a set radial range of the horizontal directional hole; during or after each stage of drilling, in-situ geostress testing equipment is used to carry out in-situ geostress testing to obtain the geostress data of the surrounding rock along the tunnel axis; during each stage of drilling, the surrounding rock strength is inversed by using the drilling parameters, the lithological boundary is inversed based on a horizontal directional drilling annulus cuttings migration model, and the surrounding rock state along the tunnel axis is inversed by combining the surrounding rock strength and the lithological boundary; 2. The method according to claim 1, wherein, the continuous detection result of the tunnel geological along the axis is obtained by combining the geological characteristics, the geostress data of the surrounding rock and the surrounding rock state. The method of drilling a horizontal directional hole along the tunnel axis in the tunnel non-face region by using the horizontal directional drilling machine to realize continuous detection of the tunnel geological along the axis comprises the following steps: a horizontal directional drilling section drilling distance is determined according to a tunnel construction scheme, a horizontal directional drilling machine type, horizontal directional drilling machine parameters and drilling tool facilities matched with the horizontal directional drilling machine are determined, and a drilling scheme is formulated; a first stage horizontal directional hole drilling is carried out from a set tunnel excavation opening by using the horizontal directional drilling machine according to the drilling scheme, and a first stage tunnel excavation is carried out along a horizontal directional hole trajectory formed by the first stage horizontal directional hole drilling when the first stage horizontal directional hole drilling is completed; after the first stage tunnel excavation is completed, the horizontal directional drilling machine is moved to a drilling machine parking place in the tunnel to repeatedly carry out horizontal directional hole section drilling, and tunnel section excavation is carried out along the tunnel axis; 3. The method according to claim 2, wherein, during or after each horizontal directional hole section drilling, the electromagnetic wave radial detection equipment, the acoustic wave radial detection equipment and the in-situ geostress testing equipment are installed on the horizontal directional drilling machine to carry out tunnel detection work and complete full-line relay continuous drilling and testing of the horizontal directional drilling machine along the tunnel axis. The first stage horizontal directional hole drilling comprises the following steps:

4. The method of claim 2, wherein, when the tunnel is not excavated, a horizontal directional hole is drilled along the tunnel axis by using the horizontal directional drilling machine at a set tunnel excavation opening, drilling is stopped after a preset drilling distance is reached, and the preset drilling distance is equal to the horizontal directional drilling section drilling distance. The horizontal directional hole section drilling comprises the following steps: a section drilling trajectory of the horizontal directional drilling machine is planned, the section drilling trajectory comprises sequentially connected hole opening straight-line drilling sections, an increasing-inclination section, a decreasing-inclination section and an along-tunnel-axis drilling section, the hole opening straight-line drilling section is parallel to the along-tunnel-axis drilling section, the along-tunnel-axis drilling section is collinear with the tunnel axis, and the distance of the section drilling trajectory along the tunnel axis direction is equal to the horizontal directional drilling section drilling distance. The horizontal directional drilling machine is used to drill along the segmented drilling trajectory to obtain a horizontal directional hole, wherein the position of the drilling segment along the tunnel axis formed by the segmented drilling of the horizontal directional hole coincides with the position of the horizontal directional hole formed by the first stage horizontal directional hole drilling.

5. The method of claim 2, wherein, The drilling machine parking place in the tunnel adopts an emergency parking belt behind a cross tunnel or a working area of a tunnel face; If cross tunnel excavation is performed during tunnel excavation, the horizontal directional drilling machine is moved to the middle of the cross tunnel in the tunnel; If cross tunnel excavation is not performed during tunnel excavation, the horizontal directional drilling machine is moved to the emergency parking belt behind the working area of the tunnel face.

6. The method of claim 1, wherein, The geological features of the geological anomaly body within the radial setting range of the horizontal directional hole are obtained by using the electromagnetic wave radial detection equipment and the acoustic wave radial detection equipment, including: During each stage of drilling or after the drilling is completed, the electromagnetic wave radial detection equipment is started, and the accurate positioning of the geological anomaly body within the radial setting range of the horizontal directional hole and the corresponding image are obtained by using the electromagnetic wave radial detection equipment; During each stage of drilling or after the drilling is completed, the acoustic wave radial detection equipment is started, and the three-dimensional stereoscopic recognition data of the geological anomaly body within the radial setting range of the horizontal directional hole are obtained by using the acoustic wave radial detection equipment; Combined with the positioning, image and three-dimensional stereoscopic recognition data of the geological anomaly body, the geological features within the tunnel drilling segment formed by this stage of drilling are obtained.

7. The method of claim 1, wherein, The in-situ test of the geo-stress includes: During each stage of drilling or after the drilling is completed, the in-situ test equipment of the geo-stress is started to perform the in-situ test of the geo-stress: A test area is selected on the hole wall of the horizontal directional hole, three test points are selected in the test area in turn, the strain of the hole wall of each test point in the circumferential direction, the radial direction and the tangential direction is obtained by using the in-situ test equipment of the geo-stress, and the far-field three-directional geo-stress of the test area is obtained according to the strain measurement results of the hole wall of the three test points in the circumferential direction, the radial direction and the tangential direction, combined with the horizontal irregular hole wall strain-far-field stress analytical model based on the complex variable function; A plurality of test areas are selected, and the in-situ test of the geo-stress is repeatedly performed to complete the in-situ test measurement of the tunnel drilling segment formed by this stage of drilling, and the geo-stress data information of the surrounding rock on the tunnel axis is obtained.

8. The method according to claim 7, wherein, The strain of the hole wall of each test point in the circumferential direction, the radial direction and the tangential direction obtained by using the in-situ test equipment of the geo-stress includes: The initial strain of the test point is obtained by using the in-situ test equipment of the geo-stress; The strain change of the test point hole wall rock core before and after the rock sample around the test point is cut is collected by using the in-situ test equipment of the geo-stress; The strain of the hole wall of the test point in the circumferential direction, the radial direction and the tangential direction is obtained according to the strain change of the test point hole wall rock core before and after the rock sample around the test point is cut, and the strain measurement of the test point is completed.

9. The method of claim 1, wherein, The surrounding rock strength is inversed by using the while-drilling parameters, the lithology boundary is inversed based on the horizontal directional drilling annulus cuttings migration model, and the surrounding rock state on the tunnel axis is inversed combined with the surrounding rock strength and the lithology boundary, including: During each drilling process, the while-drilling parameters are collected in real time, and the while-drilling parameters include the drilling pressure, the drilling bit rotating speed, the torque, the drilling bit and drilling tool size, the mud flow rate and the mechanical drilling speed parameter change; The mechanical specific energy of the horizontal directional drilling rig is obtained in combination with the drilling trajectory and the while-drilling parameters of the horizontal directional hole, the rock strength model is constructed based on the mechanical specific energy, and the rock strength along the horizontal directional hole trajectory is obtained by using the rock strength model; The rock debris position, lithology boundary, and spatial distribution of the rock type and physical property characteristics along the tunnel axis are obtained according to the while-drilling parameters and the horizontal directional drilling annular debris migration model; The rock property along the tunnel axis is inverted in combination with the rock strength and the spatial distribution of the rock type.

10. A tunnel geological axis continuous global exploration system for implementing the method according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: The horizontal directional drilling rig, the electromagnetic wave radial detection equipment, the acoustic wave radial detection equipment, the in-situ ground stress testing equipment, the rock property inversion module, and the tunnel detection result extraction module are combined to realize the continuous detection of the tunnel geology along the axis. The horizontal directional drilling rig is used to drill the horizontal directional hole along the tunnel axis in the non-tunnel face area of the tunnel in stages to realize the continuous detection of the tunnel geology along the axis. The electromagnetic wave radial detection equipment and the acoustic wave radial detection equipment are used to obtain the geological characteristics of the geological anomaly body within the radial range of the horizontal directional hole. The in-situ ground stress testing equipment is used to carry out the in-situ ground stress testing to obtain the rock ground stress data information along the tunnel axis. The rock property inversion module is used to invert the rock strength by using the while-drilling parameters, invert the lithology boundary based on the horizontal directional drilling annular debris migration model, and invert the rock property of the tunnel axis in combination with the rock strength and the lithology boundary. The tunnel detection result extraction module is used to obtain the continuous detection result of the tunnel geology along the axis in combination with the geological characteristics, the rock ground stress data information, and the rock property.

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