7619 results about "Rock bolt" patented technology

The present invention discloses an anti-corrosion and anti-seepage anchor structure for new buildings, which includes multiple steel strands arranged in an anchor hole. The top of the anchor hole includes a cushion layer, a bottom plate and a surface layer from bottom to top; a tension end anchor assembly is arranged at the top ends of the multiple steel strands and is located in the bottom plate below the surface layer. The tension end anchor assembly includes a settlement type winged anchor backing plate, which is arranged at the top of the multiple steel strands and is located at the top surface of the bottom plate. The settlement type winged anchor backing plate has a cylindrical structure, and the cylindrical structure includes a cylinder head part, a cylinder body part and a cylinder tail part from top to bottom. Among them, the tension anchor of the tension end anchor assembly is arranged at the cylinder head part; a connecting pipe is sleeved outside the multiple steel strands, and the upper end of the connecting pipe is hermetically connected to the lower end of the cylinder tail part; a water-stop steel ring assembly is embedded in the bottom plate and the cushion layer at the same time, and the lower end of the connecting pipe extends into the water-stop steel ring assembly; a front anchor carrier assembly is arranged at the other ends of the multiple steel strands. It can solve the problem of upward seepage of underground foundation water.

The invention relates to the technical field of tunnel engineering, in particular to an anti-collapse comprehensive treatment construction process for a tunnel to pass through a karst development area, which comprises the following steps: S1, early-stage exploration and planning: understanding a geological structure, karst development condition and underground water distribution along the tunnel in detail through drilling exploration, geological radar and seismic wave exploration; according to the anti-collapse comprehensive treatment construction process for the tunnel crossing the karst development area, the construction strategy is adjusted according to the actual geological condition, geological risks are treated more accurately, the construction progress is accelerated by adopting modern technologies and equipment such as geological radars, accidental interruption is reduced, comprehensive treatment measures are accurately controlled, and the construction efficiency is improved. The safety of the construction process is greatly improved, the influence on the surrounding environment is reduced, pollution is reduced by using environment-friendly materials and technologies, meanwhile, novel supporting materials and design are adopted in the construction technology, the novel supporting materials comprise a reinforcing mesh, anchor rods and sprayed concrete, immediate and lasting supporting is provided, and rock mass loosening and collapse are prevented.

The invention provides a pre-stressed anchor cable construction arrangement quality evaluation method, and relates to the field of underground engineering, and the method comprises the following steps: S1, model construction: building three-dimensional numerical models of different anchor rod arrangement schemes; s2, simulation calculation and result evaluation, wherein excavation simulation calculation is executed according to the three-dimensional numerical models of different anchor rod arrangement schemes, and numerical simulation calculation results of surrounding rock deformation, stress distribution, damage and fracture area distribution and supporting structure stress are obtained; evaluating numerical simulation calculation results of different anchor rod arrangement schemes to obtain evaluation indexes, and determining an optimal scheme according to the evaluation indexes. Through the cooperation of the above structures, the method has the following beneficial effects: 1, the evaluation accuracy can be comprehensively improved, and the data is converted into a visual and quantitative evaluation result by constructing a comprehensive evaluation system and applying a data analysis model and algorithm; and secondly, by establishing an error correction model, the deviation between numerical simulation and on-site monitoring data can be accurately calibrated.

The invention relates to the field of tunnel engineering geology and support design, and discloses a weak surrounding rock tunnel deformation risk discrimination method based on shear expansion-shear constitutive, which comprises the following steps: constructing a nonlinear coupling model between a shear expansion angle and shear stress, normal stress and joint parameters, and obtaining the shear expansion angle; establishing a volumetric strain rate discrimination formula; inverting an initial crustal stress tensor field; reconstructing an irregular tunnel boundary; constructing a risk level discrimination model, and outputting a risk level; supporting schemes such as supporting rigidity, anchor rod parameters and spraying layer thickness are matched according to the risk grades; establishing a model to predict a risk trend; a support adjustment suggestion is generated; collecting monitoring data to dynamically correct model parameters; and all the modules are integrated in a deployment system. According to the method, the coupling relation between the shear expansion angle and the shear strength is introduced, the coupling type constitutive discrimination model is established, the risk grading system and the support correction strategy associated with the support response are constructed, and active early warning of the high-risk section and dynamic adjustment of the support rigidity are achieved.

According to the drilling, sealing and injecting integrated anchor rod drilling intelligent monitoring system and method, a rod body is sequentially provided with a head-section wave-shaped threaded section, a middle-section large threaded section and a tail-section wave-shaped threaded section from the head end to the tail end, and a grouting channel is formed in the axis of the rod body; the drill bit and the round nut are respectively mounted at the head and tail ends of the rod body; the anti-shearing tray, the constant-torque pressing sheet and the hexagon nut are arranged on the outer side of the tail-section wave-shaped thread section in a sleeving manner; the built-in mixer is inserted into the grouting channel; the drilling machine is connected with the drilling, sealing and injecting anchor rod through a monitoring sensor arranged outside the hexagon nut in a sleeving mode. A strain type force sensor, a rotating speed sensor, a high-frequency vibration sensor, a well deviation instrument and a load sensor are arranged in the monitoring sensor. The method comprises the steps that a drilling machine rotates forwards to drive a drill bit to conduct drilling operation, deslagging operation is conducted synchronously, and in the drilling process, various sensors are used for collecting various parameters in real time; pre-tightening is conducted through reverse rotation of the drilling machine; a built-in mixer is used for grouting operation; and blocking treatment. According to the system and the method, the operation process can be intelligently monitored.

The invention relates to the technical field of civil engineering, and particularly discloses a tunnel early-high-strength rock anchoring and shotcreting synergistic effect bearing arch active support design method which comprises the following steps: determining a rock anchor bearing arch acting load and establishing a rock anchor bearing arch calculation model; calculating to obtain the most unfavorable section displacement and stress of the rock anchor bearing arch; verifying whether the displacement of the rock anchor bearing arch meets the requirement; a safety evaluation method of the pre-stressed anchor rods is provided, and the safety of the pre-stressed anchor rods is evaluated according to a rock anchor bearing arch calculation result; establishing a sprayed concrete calculation model; calculating to obtain the most unfavorable section displacement and stress of the sprayed concrete; a sprayed concrete safety and durability evaluation method is provided; active support parameters are determined according to the calculation result of the rock anchor bearing arch and the calculation result of the sprayed concrete. By means of the method, the safety and durability of rock-anchor-shotcrete active supporting under different supporting parameters can be simply, rapidly and accurately calculated, reference is provided for tunnel engineering design adopting active supporting, and good engineering value is achieved.

The present invention belongs to the technical field of anchor protection apparatuses. Provided is an automatic anchor protection platform having combined support of anchor rods and anchor cables. The automatic anchor protection platform comprises a movable chassis, a multi-cycle anchor rod drilling rig, an anchor rod drilling rig posture positioning control device, an anchor cable support device, a temporary support device, an electrical system and a hydraulic system. Said automatic anchor protection platform integrates the multi-circle anchor rod drilling rig, the anchor cable support device and the temporary support device, and therefore meets the anchoring and support requirements of roadways under different geological conditions, allows anchor rod and anchor cable parallel support operations to be conducted at the same time, and achieves efficient coordinating matching linkage integrated design, thus further promoting efficient operation processes in limited spaces such as coal mines and tunnels.

The invention provides an anchor rod with a barb structure and a construction method.The anchor rod comprises a hollow anchor rod body, a core rod arranged in the anchor rod body and a barb part arranged on the outer side of the anchor rod body, and the length direction of the core rod is the same as that of the anchor rod body; the multiple barb parts are arranged in the length direction of the anchor rod body at intervals, a plurality of barb pieces are arranged on each barb part at intervals, and the barb pieces are obliquely arranged on the anchor rod body. And barb pieces are arranged at the positions, corresponding to the barb parts, of the core rod. According to the anchor rod with the barb structure and the construction method, the core rod is arranged in the hollow anchor rod body, and the barb pieces and the barb pieces are matched to form a special composite stress form, so that the overall pulling resistance of the anchor rod is effectively improved, the construction cost is reduced, and the construction period is shortened; and as the designed length of the anchor rod is obviously shortened, disturbance to the surrounding environment is reduced, and pollution to the environment is reduced.

The invention belongs to the field of surrounding rock rockburst early warning, and provides a rockburst early warning method and system based on micro-seismic energy and support stress coupling monitoring, which are used for carrying out deep gold mine roadway surrounding rock micro-seismic monitoring and anchor rod support stress monitoring. Establishing a micro-seismic energy data set, and carrying out statistical analysis to obtain a micro-seismic energy early warning index; the anchor rod supporting stress is analyzed, and then an anchor rod stress early warning index is determined; and carrying out information fusion on the micro-seismic energy early-warning index and the anchor rod stress early-warning index, establishing a combined early-warning method based on micro-seismic energy and support stress, and carrying out evaluation and early-warning on the rock burst grade of the surrounding rock. Rockburst occurrence risks can be effectively reduced, and safety of constructors and mechanical equipment is guaranteed.

The invention belongs to the technical field of supporting structure performance evaluation, and particularly discloses and provides an NT-CEP pile wall anchor foundation pit supporting structure anti-overturning evaluation method which comprises the steps that in the whole construction period, the construction process is divided into a plurality of continuous load steps based on excavation and supporting procedures; under each load step, pile body strain, arc-shaped wall stress, anchor rod axial force and deep soil displacement are synchronously collected, and a multi-source response data set is constructed; constructing an NT-CEP pile-arc wall-anchor rod coupling model based on the design drawing; carrying out inversion analysis through the model, and solving the load sharing proportion and the overall anti-overturning safety coefficient of each component under each load step; and continuously identifying the abnormal component based on the load sharing proportion, and dynamically analyzing and outputting an anti-overturning capability evaluation index based on the change trend of the safety coefficient. According to the method, dynamic refined evaluation of the construction process is realized, and the authenticity and perspectiveness of an evaluation result are remarkably improved.

The invention discloses a drill rod for construction of an integrated stirring forming type cemented soil stiff anchor rod, the drill rod comprises a drill bit part and a hollow drill rod, the drill bit part comprises a shell, an anchor disc fixed in the shell and a spiral blade welded on the shell, and the hollow drill rod is inserted into the shell; the sheath steel pipe is inserted into the hollow drill rod and fixed to the shell, the grouting pipe is inserted into the sheath steel pipe, one end of the rod body is fixed to the anchor disc, and the other end of the rod body extends out of the sheath steel pipe. A first grouting hole is formed in the shell, and a second grouting hole is formed in the sheath steel pipe. The invention further discloses a construction method of the integrated stirring forming type cemented soil stiff anchor rod. When the method is used, the processes of hole forming, anchoring, grouting and the like are integrally formed, the process is simple, the speed is high, and the quality is easy to control; the formed cement-soil pile body is uniform in internal structure and reliable in strength; tension of the anchor rod is uniformly distributed, so that stress concentration can be reduced; and the formed cement soil pile body is high in end strength and good in safety.

A bilateral expanding excavation construction method for a middle pilot tunnel of a tunnel is provided. Section or excavation width of the middle pilot tunnel is generally not larger than that of a common double-line or double-lane tunnel; a step construction method is adopted, and the construction method is the same as that of a common double-line or double-lane tunnel; and the construction method is familiar to constructors, and the construction difficulty is avoided. A primary support section of the middle pilot tunnel can be expanded and excavated after being closed by at least 3 meters; if a side tunnel face is stable, and the problem of the operation height of manual installation of a steel frame and an anchor rod is solved, one-time excavation and support can be achieved, and the construction is more convenient; or otherwise, a side tunnel is excavated according to a two-step or three-step method. The primary support of the middle pilot tunnel can be timely closed; the primary support of the side tunnel and the primary support of the middle pilot tunnel can be completely connected in sequence, and various errors and deformation influences of surrounding rocks and the supportare left at an inverted arch part for treatment; and the construction progress is basically the same as that of the common double-line or double-lane tunnel.

The invention discloses an anti-freezing power transmission line tower supporting foundation suitable for a frozen soil area, relates to the technical field of power transmission line tower supporting, and aims to solve the problem that an existing power transmission line tower supporting foundation cannot resist freezing and cannot keep supporting efficiency under season replacement. Comprising a pile foundation cylinder, a pile foundation cylinder inner supporting column, an arc-shaped heat conduction pipe and a frost heaving piercing mechanism. A pile foundation cylinder top seat and a power transmission line tower connecting frame are mounted at the top of the pile foundation cylinder; the pile foundation cylinder inner supporting column is embedded in the pile foundation cylinder, circulating flow channels are designed between the pile foundation cylinder inner supporting column and the pile foundation cylinder and between the pile foundation cylinder inner supporting column and the arc-shaped heat conduction pipe, and an equipment mounting inner cavity is formed in the top of the pile foundation cylinder inner supporting column. When the soil body is subjected to frost heaving, the transverse anchor rods can pierce into the surrounding soil body, so that the pile foundation cylinder and the surrounding soil body are anchored together, and the frost heaving is further resisted.

The invention provides an anchor rod fixed type collapse rockfall monitoring and early warning method based on vibration induction, and belongs to the field of geological disaster prevention and early warning. The detection system comprises a plurality of vibration sensors fixed on a slope through anchor rods, a solar panel for supplying power to the sensors, an intermediate data processing platform, early warning channels and early warning modes corresponding to different early warning channels, for a dangerous area where rockfall disasters are prone to happening, n vibration sensors fixed by anchor rods are arranged to form a dot matrix network, the coverage of the monitored area is increased, the vibration sensors are powered by solar panels, the dot matrix network is connected with an intermediate data processing platform after data fusion, and the intermediate processing platform is connected with an early warning channel. The early warning information is transmitted out in different police modes; the system has applicability for early warning of mountain slope rockfall disasters, can realize large-range, full-angle and large-area monitoring and early warning, and is powered by solar energy, so that power consumption is reduced, and cost is saved.

The invention belongs to the technical field of underground engineering, and discloses an omnibearing intelligent monitoring system, method and device for an underground anchoring pull-out test. According to the method, electromagnetic signals generated in the stress process of the anchor rod are captured in real time through an electromagnetic sensor, and internal stress changes and energy distribution are reflected; the deformation and stress states of the anchor rod in the dynamic environment are evaluated through a strain gauge and accelerometer combined data combination method, the deformation condition of the anchor rod is monitored through the strain gauge, and the stress-strain relation is recorded; an accelerometer is used for detecting the dynamic response of surrounding rock mass so as to evaluate the overall stability of the rock mass; a coupling medium is injected, the computer terminal stores the collected signals locally or in a cloud end and analyzes the signals, stress and deformation parameters in an anchor rod pull-out test are extracted, and an anchor rod stress cloud picture is generated in real time. According to the method, the safety and reliability of underground engineering are remarkably improved, and a new technical support is provided for evaluation of anchoring quality.

The invention discloses a tunnel construction quality evaluation system and method. The evaluation system comprises a data acquisition module, a quality evaluation standard system, an early warning and notification module and a data management module. Wherein the data acquisition module is used for acquiring construction vehicle data, construction site sensors and site photographing; the quality evaluation standard system comprises drilling quality evaluation, back break evaluation, primary support thickness evaluation, anchor rod construction quality evaluation, waterproof and drainage pipe quality evaluation, steel bar binding quality evaluation, secondary lining quality evaluation and primary support flatness evaluation; the early warning and notification module integrates early warning signals from all the evaluation modules; and the data management module is responsible for storing data generated by each independent module and executing cross-module data analysis. According to the tunnel construction quality evaluation system, by integrating advanced monitoring equipment, an automatic algorithm and comprehensive data analysis, the quality control effect in the tunnel construction process is remarkably improved.

The invention provides a deep-buried soft rock tunnel supporting structure design method based on energy regulation and control, and belongs to the technical field of tunnel engineering. Comprising the following steps: obtaining components of crustal stress in a large principal stress direction, a middle principal stress direction and a small principal stress direction; manufacturing a rock cylinder test piece and a cube test piece; carrying out a conventional uniaxial compression test on the cylindrical test piece to obtain basic strength parameters of the surrounding rock; carrying out a true triaxial loading and unloading test on the cubic test piece to obtain the ultimate dissipated energy of the surrounding rock; drawing up a tunnel anchor rod supporting structure design scheme; establishing a deep-buried soft rock tunnel calculation model considering the synergistic effect of the surrounding rock and the anchor rod, and calculating the dissipated energy density of the surrounding rock and the absorbed energy of the supporting structure; the instability energy judgment basis of the surrounding rock and the instability energy judgment basis of the anchor rod are calculated; and judging the stability of the surrounding rock and the stability of the anchor rod. The method is suitable for the tunnel in a deep high-energy geological environment, and can reflect the energy driving essence of the instability failure of the high-ground-stress deeply-buried soft rock tunnel.

A flexible hollow anchor rod allowing for digital monitoring, and a construction method. In the anchor rod, a flexible hollow rod body (1) is formed by a hollow steel pipe (1.2c) and a steel strand (1.2); a hollow anti-torsion sleeve (1.1) sleeves a left end of the flexible hollow rod body (1) by means of a friction increase wire spring (1.3); a slurry stop plug (1.5) is mounted at an end portion of the hollow anti-torsion sleeve (1.1); a centering locator (1.6) sleeves a right end of the flexible hollow rod body (1); a hole sealing sleeve (2) sleeves an outer side of the hollow anti-torsion sleeve (1.1); an anti-torsion tray (3) consists of a central tray body (3.1) and four stop columns (3.2) and sleeves a left end of an anti-torsion connecting section; and a fiber grating sensor (8) is arranged at an outer side of the rod body. The construction method comprises: drilling a stepped hole in rock mass; loading an anchoring agent, and sequentially placing the flexible hollow rod body (1), the anti-torsion tray (3), a ribbed tray (4), a centering ball head (5), an anti-wear washer (6) and a torque nut (7); stirring the anchoring agent, and completing fastening of the anchor rod; and accurately controlling the grouting reinforcement time, and completing lag grouting. By means of the fiber grating sensor, real-time monitoring of the state of the anchor rod can be achieved, and the advantages such as a high mounting speed, convenient grouting and high anchoring quality are achieved.

The invention discloses a drilling, sealing and injecting integrated construction method for a self-propelled anchor rod. A drilling machine and the self-propelled anchor rod are connected through a rod body connector; a drilling machine is used for providing driving force, meanwhile, a round nut is used for limiting a hexagonal nut, and torque is transmitted to a drill bit; the front-section spiral deslagging channel and the rear-section spiral deslagging channel are used for synchronously discharging slag and chips; the drilling machine is controlled to rotate reversely, the constant-torque pressing piece and the anti-shearing tray are compacted at the hole opening through the hexagonal nut, and the installation operation of the self-advancing anchor rod is completed until the pressing state is achieved; a grouting pump is used for enabling slurry to enter a slurry mixer through a grouting pipe, then the slurry is injected into the deep position of a hole through a grouting channel and a drill bit slurry outlet, in the process, a large threaded section of the middle section is used for conducting dense plugging on a hole gap, the pressure maintaining effect can be achieved, and effective plugging of the crack can be achieved; and when the grouting pressure is suddenly increased, the grouting pump is controlled to stop, the grouting operation is stopped, and then the slurry mixer is blocked. By means of the method, hole drilling, hole sealing and grouting operation can be integrally completed.

The invention discloses a yielding grouting anchor rod for a high-ground-pressure soft breakable roadway, and belongs to the technical field of roadway supporting, the yielding grouting anchor rod comprises an anchor rod body, the outer surface of the anchor rod body is sleeved with a yielding cylinder, a yielding plate and a rubber plug, the rubber plug is located on one side of the yielding cylinder, the outer surface of the yielding plate is attached to the inner surface of the yielding cylinder, and the outer surface of the yielding plate is attached to the inner surface of the yielding cylinder. A spring and evenly-arranged connecting rods are arranged on the outer wall of one side of the yielding plate, the connecting rods are located between the anchor rod and the spring, one end of each connecting rod penetrates through the inner wall of one side of the yielding cylinder to be connected with one end of a rubber plug, a sleeve is embedded in the outer surface of the rubber plug, and the outer wall of one side of the sleeve is connected with the outer wall of one side of the yielding cylinder. The pressure plate pushes the compression spring to deform, tensile fracture of the anchor rod body caused by overlarge pressure is avoided, the connecting rod is driven to push the rubber plug in the process of pushing the compression spring to deform, the dual pressure yielding and releasing function is achieved, and the anchor rod can adapt to roadway surrounding rock deformation in the high ground pressure environment to a certain extent.

The invention relates to the technical field of construction optimization, in particular to a deep underground engineering construction optimization method and system based on an intelligent support system. According to the technical scheme, stress field, seepage field and deformation field data of surrounding rock are collected in real time; constructing a digital twinborn model, and dynamically updating model parameters; adopting a multi-objective genetic algorithm to optimize support parameters; and executing adaptive control. According to the method, the stress field, seepage field and deformation field data of the surrounding rock are collected in real time through the multi-physics field sensing network, the state change of the surrounding rock can be timely and accurately monitored, meanwhile, the model parameters are dynamically updated so that the model can more accurately reflect the actual situation of the surrounding rock, and the real-time performance of the surrounding rock is improved. And through jet control and anchor rod compensation in self-adaptive control, support parameters can be adjusted in real time according to the actual condition of the surrounding rock, the reliability of a support structure is improved, the stability of the surrounding rock is enhanced, and the safety risk in the construction process is reduced, so that the construction safety is improved.

The invention discloses a multifunctional all-in-one unit which comprises a rack, a tunneling part, a vertical arch part, an arch spraying part and a rock drilling part. A slag discharging channel is formed in the lower portion or at least one side of the rack. The tunneling part is arranged at the front end of the rack and used for tunneling excavation. The arching part is arranged on at least one side of the rack in a sliding mode and used for being matched with the arching part to conduct arching operation, the arching part and the rock drilling part are arranged on the rack in a sliding mode, the arching part is used for guniting operation and being matched with the arching part to conduct arching operation, and the rock drilling part is used for drilling operation; according to the scheme, the integrated trolley is integrated with multiple functions of excavation, erection, bolt anchoring, guniting, pumping and the like, a slagging-off machine and a slag car are arranged for deslagging, full-process construction of the tunnel face is completed, parallel processes or seamless connection of the processes is achieved, the traditional technological method that all the processes are independent and not parallel and work in a multi-machine cooperation mode is changed, the construction progress is greatly accelerated, and the construction efficiency is improved. And more values are created for customers.

The present invention relates to the technical field of underground engineering rockburst prevention and control safety. Provided is a quantitative design method for rockburst energy absorption prevention and control. The method comprises: firstly, establishing an underground-engineering finite-element numerical calculation model, and performing underground-engineering excavation simulation calculation; delineating the location and range of rockburst damage and a rockburst pit depth according to an LERR value, and providing the amount of released energy at different positions during a rockburst; then, determining the location, trend and inclination angle of a structural plane; and then, determining the design length of a free section of each energy absorption anchor bolt, and determining an optimal length of each single energy absorption anchor bolt in combination with a design anchoring force of the anchor bolt; then, calculating ejection kinetic energy of rockburst rocks; and finally, determining the length of an anchoring section of each energy absorption anchor bolt, the total length of each anchor bolt, and the number of anchor bolts, such that the total energy absorption capacity of all the energy absorption anchor bolts is greater than the ejection kinetic energy when a rockburst occurs. The method provides a quantitative design method and process for energy absorption anchor bolts, and provides a design basis for scientific design of rockburst energy absorption prevention and control.

The invention discloses a farm wall reinforcing device. Farm wall reinforcing equipment comprises an adjusting sliding frame, an even number of reinforcing devices are installed on the adjusting sliding frame, protective cover baffles are installed on the surfaces of the reinforcing devices, pouring mold clamping plates are arranged in the reinforcing devices, inner grooves are formed in the upper portions of the pouring mold clamping plates, and an even number of steel bar fixing frames are arranged between the inner grooves. A turnover sealing cover which is movably hinged is installed on the inner groove, a fixing steel bar is installed in the steel bar fixing frame, and an on-plate clamping groove is formed in the surface of the pouring mold clamping plate. The adjusting sliding frame is installed at the position of the root of a wall needing to be reinforced, then the reinforcing devices are installed on the adjusting sliding frame in a back-to-back mode, the reinforcing devices clamp the wall in a butt mode, then the threaded anchor rods are sequentially inserted into the pouring mold clamping plates in a matched mode to form opposite pulling, and the threaded anchor rods are clamped and fastened; and finally, after a wall inserting fixing rod, a wall body connecting clamp and a fixing steel bar are inserted, concrete is poured into a guiding and conveying groove, the concrete and the wall body are combined and solidified, and the reinforcing work of the wall body is completed.

The invention relates to the field of geotechnical engineering, and discloses a self-stress anchor rod failure evolution simulation method for jointed rock mass bolting-grouting reinforcement, which comprises the following steps: S1, constructing a three-dimensional rock mass model containing a joint structure in an FLAC3D platform, and defining joint surface space distribution and geometric parameters; s2, a bolting-grouting structure is introduced into the three-dimensional rock mass model, an anchor rod, a grouting body and the contact relation between the anchor rod and the grouting body and the rock mass are set, and an anchor rod load transfer model is established; s3, a loading path is set, displacement control is adopted as a loading mode, and a certain included angle is formed between the loading direction and the joint surface; and S4, establishing a numerical model in FLAC3D, performing grid division, and setting a rock mass material constitutive model and contact surface parameters. By accurately controlling the loading direction and the loading angle in simulation and analyzing the change influence of different loading paths on the failure mode of the bolting-grouting structure, the problem that the traditional simulation method neglects the change of the failure mode under different loading conditions is solved.

The invention discloses a drilling, sealing and grouting anchor rod, an intelligent drilling monitoring system and an integrated intelligent construction method. According to the anchor rod, a rod body is sequentially provided with a head-section wave-shaped threaded section, a middle-section large threaded section and a tail-section wave-shaped threaded section from the head end to the tail end, and a grouting channel is formed in the axis of the rod body; the PDC drill bit and the round nut are installed at the head end and the tail end of the rod body respectively. The anti-shearing tray, the constant-torque pressing sheet and the hexagon nut are arranged on the outer side of the tail-section wave-shaped thread section in a sleeving manner; and the built-in mixer is inserted into the grouting channel. According to the system, a drilling machine is arranged outside a hexagon nut in a sleeving mode through a machine rod connector; the vibration sensor is mounted on the machine rod connector; the monitoring sensor group is installed on the drilling machine. The method comprises the steps that the drilling machine rotates forwards to drive the PDC drill bit to conduct drilling operation, and deslagging is conducted synchronously; pre-tightening is conducted through reverse rotation of the drilling machine; a built-in mixer is used for grouting operation; and carrying out plugging treatment. According to the anchor rod, drilling, hole sealing and grouting operation can be integrally achieved; the system and the method are favorable for improving the drilling efficiency, and the construction efficiency of support construction can be effectively improved.

The utility model discloses an auxiliary supporting structure for a mine, which relates to the technical field of mine supporting and comprises a fixing frame, a driving mechanism is movably mounted in the fixing frame, and an adjusting mechanism is fixedly mounted on one side of the fixing frame. By the adoption of the structure, when the device is used, the lead screw can be assisted to rotate through the adjusting mechanism, then the sliding rod is driven to slide in the sleeve frame, the connecting plate is driven to move outwards, when the supporting plate makes contact with the inner wall of a mine, the supporting plate can rotate in a self-adaptive mode due to the hinge ball design of the fixing base, and the rotating adaptation range can be enlarged through cooperation of the connecting plate and the reserved groove; the device can adapt to an inclined plane in a mine and is high in adaptive capacity, the friction force of the outer side of the supporting plate can be increased through the anti-skid conical teeth so as to improve the stability, bolts or anchor rods can be inserted into the mounting holes when needed, stable supporting is achieved, and therefore the overall comprehensive stability of the device is improved, and the device can better adapt to different mine environments and provide reliable supporting.

The invention discloses a pressure relief and shock absorption method for a deep high-stress key pillar. (a) a top plate is arranged at the top of the ore pillar, four inclined kerfs are alternately arranged in a top plate area around the ore pillar, and the kerfs are symmetrically arranged in a cross shape; (b) eight anchor rod drill holes perpendicular to the top plate are formed in the interval area between the adjacent kerfs and the periphery of the ore pillar, perpendicular anchor rods are arranged in the anchor rod drill holes, and an orthogonal supporting network formed by the perpendicular anchor rods is formed; and (c) preferentially releasing the bending energy of the roof through the kerf, reducing the vertical load of the ore pillar, and meanwhile, forming a pressure arch effect by applying the prestress of the vertical anchor rod, thereby realizing space-time coupling support of the kerf and the anchor rod, and inhibiting roof separation and dynamic disturbance. The invention has the characteristics of excellent stress transfer, strong vibration suppression and excellent overall column stability.

The invention discloses a surrounding rock deformation treatment method which comprises the following steps: determining the range of a strong influence area in a fault through advanced geological detection, and adopting a graded support strategy for different influence areas: when the width of the strong influence area in the fault is three times greater than the span of a tunnel, arranging an NPR anchor cable group on the ground surface to form a pre-reinforcement system; during benching, NPR anchor rods and steel arches are combined for supporting in a fault non-weak-influence area, and long and short NPR anchor cables are additionally arranged in a fault weak-medium-influence area for collaborative supporting; double-gradient grouting is implemented in front of the boundary of the moderately strong affected zone, a peripheral reinforcing shell is formed by grouting at the first gradient of 2-3 MPa, and an internal permeation network is formed by grouting at the second gradient of 3.5-4.5 MPa; through real-time monitoring of the axial force of the steel arch, a linkage response mechanism of anchor cable secondary tensioning and grouting and supplementing is established. According to the method, through combination of advanced pre-reinforcement, graded support and dynamic regulation, active control over tunnel surrounding rock deformation of the fault fracture zone is achieved, and the collapse risk and the support structure damage risk are effectively restrained.

The invention discloses a non-contact monitoring method for the axial force of an end anchoring anchor rod, and relates to the technical field of anchor rod axial force measurement. The monitoring method comprises the steps that firstly, relevant parameters of surrounding rock, relevant parameters of an anchor rod in the anchoring process and relevant parameters of an anchoring agent are obtained; acquiring strain data of an anchor rod tray in the anchoring system by adopting a full-field strain measurement system, transmitting the strain data to a data processing module of the full-field strain measurement system, and acquiring anchor supporting force by virtue of a stress-strain relationship of the anchor rod tray; finally, a calculation analysis formula of the mechanical relation between the anchor supporting force Ft generated by the anchor rod tray and the anchor rod axial force F is constructed in a computer; and inputting the values of the related parameters obtained in the step 1 and the step 2 into a calculation analysis formula, and calculating to obtain the axial force of the end anchoring anchor rod. By means of the method, non-contact measurement of the anchor supporting force of the anchor rod can be achieved, and the integrity of an anchoring system is further protected.