2689results about "Anchoring bolts" patented technology

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 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 field of surrounding rock supporting, and provides an aging cracking and multi-source dynamic response self-adaptive supporting system and method in order to improve the supporting reliability, and the state of surrounding rock is sensed in real time through a multi-source sensing module; the aging damage model can comprehensively and dynamically evaluate the damage state of the surrounding rock of the mixed rock, and progressive instability accidents such as hysteresis rock burst can be effectively prevented; the dynamic disturbance model can analyze the damage effect of dynamic loads such as TBM tunneling and blasting on mixed rock surrounding rock in real time, a millisecond-level dynamic risk assessment result is provided for a self-adaptive support system, and instant instability accidents are effectively restrained. The self-adaptive support of the dynamic execution module is realized by combining the parallel decision of the aging damage model and the dynamic disturbance model, the problem that the traditional support depends on static geological data and is difficult to adapt to the dynamic damage change of the surrounding rock is solved, the stability and reliability of the support system are remarkably improved, and the engineering cost and the safety risk are reduced.

The invention provides an intelligent rapid tunneling system and a control method thereof, and relates to the technical field of tunneling device.The tunneling system comprises a tunneling anchor machine, a spraying system is arranged on the front side of the tunneling anchor machine, the spraying system comprises a first mechanical arm, a first nozzle is arranged at the tail end of the first mechanical arm, and the first mechanical arm is used for moving according to a first preset path; the coating is sprayed to the surfaces of the top plate and the side of the roadway, and the cured coating forms a supporting layer; the self-moving machine tail is arranged behind the miner-bolter; and the second mechanical arm is arranged on the rear side of the self-moving tail, a second nozzle is arranged at the tail end of the second mechanical arm, and the second mechanical arm is used for moving according to a second preset path and conducting supplementary spraying on the area which is not sprayed by the first mechanical arm. According to the tunneling system, automatic spraying and supporting of roadway surrounding rock can be achieved, the traditional procedure of manually laying an anchor net is effectively replaced, the construction efficiency is improved, the labor intensity of workers is relieved, the number of the workers is reduced, and the intelligent level of roadway supporting is improved.

The invention provides a deep coal seam roadway surrounding rock stability intelligent early warning method, and relates to the technical field of coal mine dynamic disaster prevention and control. According to the intelligent early warning method for the stability of the surrounding rock of the deep coal seam roadway, a basic sample library is constructed through a dynamic and static combined loading rock test; synchronously collecting field surrounding rock static stress and micro-seismic data and carrying out time sequence polymerization; constructing an equivalent dynamic and static combined stress index based on a dynamic and static load superposition principle, and forming a seismic-force coupling feature vector; establishing an LSTM early warning model, adopting a transfer learning strategy, pre-training by using laboratory data, and then performing fine tuning by using field data; inputting the real-time feature vector into a model and outputting an instability probability; and verifying and correcting the probability based on actual deformation data of the surrounding rock, and applying a missing report sample to online incremental updating of the model. According to the method, the dynamic and static load coupling effect is quantified, the difficulty of small sample training is overcome, and accurate and self-adaptive early warning of the deep roadway surrounding rock instability risk is realized through a physical feedback closed-loop correction mechanism.

The invention discloses a tunnel construction method for a large deformation section of soft rock, and relates to the technical field of tunnel construction for the large deformation section of the soft rock, and the tunnel construction method for the large deformation section of the soft rock comprises the following steps: drilling shallow large-aperture stress release holes and deep small-aperture stress release holes to form a layered release system; differential pressure grouting is conducted around the stress release holes, and a deep reinforcing ring and a shallow coupling ring are formed; a steel frame is erected, and a three-stage stretching locking bottom supporting assembly is installed to form a closed supporting ring; the bottoms of the adjacent steel frames are crossly connected through prestressed pull rods to form an integral rigid grid; a secondary lining is constructed after the longitudinal attenuation conduction period is judged according to the surrounding rock deformation spatial-temporal characteristics; inverted arch first and then arch wall segmented pouring is adopted, and a delayed expanding agent is doped into arch wall concrete. The method can effectively control surrounding rock deformation in the tunnel construction process of the large deformation section of the soft rock, improves the overall rigidity and stability of a supporting system, ensures that the lining is tightly attached to the surrounding rock, and reduces the construction risk.

The present invention relates to the technical field of underground coal mine excavation supporting devices, and in particular to a single-arm wheeled bolt and anchor cable drilling jumbo for a coal mine. The drilling jumbo comprises a wheeled chassis, a multi-degree-of-freedom working arm, and an airborne automatic drilling rig; the wheeled chassis carries the whole drilling jumbo; a main structure is divided into a front frame and a rear frame; one end of the multi-degree-of-freedom working arm is fixedly connected to the tail of the rear frame, and the other end of the multi-degree-of-freedom working arm is connected to the airborne automatic drilling rig and has a plurality of motion degrees of freedom relative to the rear frame; the plurality of motion degrees of freedom constitute two-stage fine tuning acting on the airborne automatic drilling rig; the first-stage fine tuning positioning is achieved by lifting / lowering, left and right swinging, extension and retraction, and rotation of the working arm; the second-stage fine tuning positioning is achieved by left and right swinging, forward and backward folding, and vertical lifting / lowering of a leveling swing mechanism; large-range adjustment of the airborne automatic drilling rig is achieved by means of cooperation of the plurality of motion degrees of freedom, and the requirements of full-section roof, side, and floor bolting are met; and the present invention replaces a traditional mode in which a hand-held pneumatic bolt drilling rig and an existing bolt and anchor cable drilling jumbo are manually operated to perform supplemental bolt and anchor cable installation.

The invention discloses a weakly cemented mining stratum roadway roof separation limit value determination method, relates to the technical field of mine roadway damage surrounding rock anchor net cable support and roof stability monitoring, and focuses on roadway surrounding rock roof support and monitoring of a weakly cemented coal mining stratum. The most typical damage form is sudden roadway roof fall and roadway integral convergence, and the life safety of mine engineering technicians is greatly threatened. The roof separation value is the relative displacement between two measuring points in the surrounding rock and between the surrounding rock at the end of the anchor rod and the surface of the roadway roof, belongs to the mine pressure display of the mine roadway, and is an important index for evaluating the anchor net cable supporting effect. The anchor net and anchor cable roof separation value based on the excavation disturbance rock damage degree is accurately calculated and monitored, and the method has important significance for guaranteeing mine safety production.

The invention discloses a kilometer deep well roadway toughness regulation and control supporting system and a dynamic design method, and belongs to the field of deep well roadway supporting. The supporting system comprises a multi-layer collaborative structure and an intelligent regulation and control module, the multi-layer collaborative structure sequentially comprises a shape memory alloy energy absorption layer used for resisting impact loads and a gradient pore foam metal buffer layer used for energy grading dissipation from inside to outside, and the multi-layer collaborative structure is connected with roadway surrounding rock in an anchoring mode through an anchor rod anchoring structure; the intelligent regulation and control module comprises a distributed optical fiber sensor array used for monitoring surrounding environment signals of surrounding rock in real time, an electrostriction driver used for regulating and controlling the rigidity of the multi-layer cooperative structure and a multi-channel data fusion terminal used for achieving underground and surface data transmission synchronization. By the adoption of the kilometer deep well roadway toughness regulation and control supporting system and the dynamic design method, the problems that a traditional supporting mode is too high in material rigidity, lacks dynamic regulation and control capacity and is insufficient in impact toughness can be solved.

According to the double-station driving seat mounting structure for the anchor rod trolley, a supporting plate is arranged at the bottom of a seat, and a supporting rod is arranged at the bottom of the supporting plate; two layers of discs are arranged at the lower end of the supporting rod, and the supporting rod is coaxially provided with a gear. A strip-shaped hole is formed in a bottom plate of the cab, and a rack is arranged on the bottom plate and located on the side, close to the shotcrete anchor operation table, of the strip-shaped hole. The lower end of the supporting rod penetrates through the strip-shaped hole, the two discs are in sliding contact with the upper face and the lower face of the bottom plate correspondingly, and the gear is meshed with the rack. The supporting rod is movably arranged in the length direction of the strip-shaped hole. When the seat faces the driving console, the supporting rod is positioned at one end of the strip-shaped hole close to the side surface of the cab; when the seat faces the shotcrete anchor operation table, the supporting rod is located at the other end of the strip-shaped hole and located in the middle of the cab in the width direction. When the seat rotates to face the shotcrete anchor operation table, the seat can be synchronously adjusted to the middle position in the width direction of the cab, an operator can obtain a more comfortable operation sitting posture, and the adjusting mode is simple and rapid.

The invention discloses a roadway grouting anchor rod, and relates to the technical field of anchor rods, and the roadway grouting anchor rod is technically characterized by comprising a rod body, a plurality of fixing rings are mounted in the length direction of the rod body at equal intervals, a plurality of through holes are formed in the circumferential direction of each fixing ring at equal intervals, and a movable insertion rod is slidably mounted in each through hole; a fixed plate is fixedly mounted at one end of each movable insertion rod, an elastic part is fixedly mounted between each fixed plate and the inner surface of the rod body, and an inclined surface is formed on each movable insertion rod; a plurality of movable rings are arranged in the rod body, the movable rings and the fixed rings are arranged in a one-to-one correspondence mode, every two adjacent movable rings are fixedly connected through a connecting rod, a limiting ring is installed in the rod body in a sliding mode, the limiting ring is fixedly connected with one end of the connecting rod, and a threaded ring is rotatably installed at one end of the limiting ring; the threaded ring is arranged at one end of the rod body, the threaded ring is in threaded connection with the rod body, the rod body cannot slide out of the hole, and the rod body is easier and more convenient to install.

The invention discloses an invasion limit surrounding rock excavation method for a large deformation section of soft rock, and relates to the technical field of invasion limit surrounding rock excavation construction for the large deformation section of the soft rock. The invasion limit surrounding rock excavation method for the large deformation section of the soft rock comprises the steps that refined partitioning of an invasion limit body is achieved through dense scanning and loose circle testing; dividing the invasion limiting body into a core pressure-bearing area and a peripheral stress relaxation area; a main stress diversion arch crossing an invasion limit section is constructed through full-ring radial grouting reinforcement and erection of a strong profile steel temporary cover arch, and effective stress transfer is achieved; the mode of subarea gradual type dismantling and chiseling and instant supporting is adopted, a peripheral stress relaxation area is treated firstly, then a core pressure-bearing area is treated, and surrounding rock disturbance is reduced; the circumferential stress equalization is realized by compensating grouting in stages and dynamically adjusting the grouting pressure according to real-time monitoring data. According to the method, the excavation construction safety of the invasion limit surrounding rock of the large deformation section of the soft rock can be improved, surrounding rock disturbance is reduced, stress distribution is optimized, and the treatment efficiency of the invasion limit surrounding rock is improved.

An anchor rod mounting trolley belongs to the technical field of tunnel construction and comprises a movable chassis, a grouting system and an operation system. The operating system comprises a working arm, a hanging basket device and a propelling device; the grouting system and the working arm are both installed on the movable chassis, the hanging basket device is installed on the working arm, and the propelling device is installed on the hanging basket device. The grouting system is used for injecting grout into an anchor rod hole; the working arm is used for adjusting the positions of the hanging basket device and the propelling device relative to the anchor rod hole; and the propelling device is used for inserting the anchor rod body into the grouted anchor rod hole. The mechanical degree can be improved, the labor intensity is reduced, the operation efficiency is improved, and the construction cost is reduced.

The invention relates to the technical field of anchor rod construction, and discloses an overturning type telescopic rod hollow grouting anchor rod which comprises a rod body, the rod body is sleeved with a plurality of sleeves evenly distributed in the length direction of the rod body, the outer walls of the sleeves are hinged to a plurality of telescopic rods distributed in the annular circumferential direction, and the telescopic rods can be overturned outwards; the outer wall of the rod body is provided with external threads, the upper end and the lower end of each sleeve are each provided with a first nut, the rod body is sleeved with the first nuts in a threaded mode, the specific positions of the sleeves are fixed through adjustment of the threads of the first nuts, and an anchor rod head is installed at one end of the rod body. The second elastic assembly drives the telescopic rod to turn over outwards and cooperates with the first elastic assembly to achieve rigid constraint, after the string is cut off, the second spring releases elastic force and drives the telescopic rod to turn over quickly, meanwhile, the connecting rod slides upwards to enable the positioning block to be clamped into the sleeve hole, reverse rotation of the telescopic rod is limited, constraint is formed, and the telescopic rod can be completely unfolded; and the problem of extension uncertainty is solved.

The invention discloses a half coal rock digging and anchoring all-in-one machine, and relates to the technical field of mining devices, the half coal rock digging and anchoring all-in-one machine comprises a pair of rear drill arm parts arranged on a machine body part, and each rear drill arm part comprises a swing oil cylinder III and a rear onboard jumbolter; a recoil force grading detection mechanism is arranged between the swing oil cylinder III and the rear onboard jumbolter; the recoil force grading detection mechanism comprises a recoil force sensor, a first microswitch, a buffer mechanism and a connecting mechanism. By arranging the recoil force grading detection mechanism, recoil force is transmitted to the mounting plate during working, the mounting plate drives the swing oil cylinder plate to act through the connecting mechanism, the connecting plate of the buffer mechanism triggers a first microswitch firstly and then abuts against a recoil force sensor, and grading detection of the recoil force is achieved; the mechanism solves the problem that the angle deflection of the rear onboard jumbolter is caused by the recoil force but is lack of effective grading detection, avoids the risk of compensation failure caused by the fault of a single detection element, and improves the detection reliability of the recoil force.

The invention discloses a zoning treatment method for preventing oversized-diameter shield tunnel segments from floating, which comprises the following steps: step 1, arranging an expansion film bag on the outer side of an upper segment, and pouring cement-water glass quick-setting slurry into the film bag through a sleeve to enable the cement-water glass quick-setting slurry to expand to form a pressure arch; 2, pre-stressed anchor rods are arranged on the lower segment, and pressure-bearing gaskets are arranged; 3, after construction in the step 1 and the step 2 is completed, grouting is conducted on the middle segment, cement-water glass double-liquid slurry is injected from the middle segment, the slurry diffuses from the middle to the vertical direction in a fan shape, and the space behind the segment wall is fully filled; the grouting body, a film bag pressure arch formed on the upper portion and an anchor rod anti-pulling system arranged on the lower portion jointly form a continuous bearing structure to cooperatively restrain overall floating of the duct piece.

The invention discloses a soft rock waterproof layer construction method for a soft rock large-deformation section tunnel, and relates to the technical field of soft rock waterproof layer construction of the soft rock large-deformation section tunnel. The construction method of the soft rock waterproof layer for the tunnel at the large deformation section of the soft rock comprises the steps that a sprayed concrete layer is constructed, a full-ring-shaped steel arch frame is erected, system anchor rods are constructed, concrete is sprayed again after full-length grouting is conducted, and a primary supporting layer containing a grouting reinforcing ring is formed; locking anchor pipe grouting is carried out on the arch springing part to form a local reinforced waterproof bearing body; based on deformation monitoring data, dynamic judgment is carried out, and radial reinforcing grouting is carried out on the obvious deformation part; and after deformation is stable, a waterproof layer is laid, a secondary lining is poured, and a composite waterproof system is formed. The waterproof reliability and the structural durability of the soft rock waterproof layer of the tunnel at the large deformation section of the soft rock can be improved.

The utility model provides an anchor rod for mining engineering, which relates to the technical field of anchor rods and comprises an anchor rod body, a cushion block and a tray are sleeved on the surface of the anchor rod body, a nut is in threaded connection with the arc surface of the anchor rod body, and a reinforcing device is arranged on the surface of the tray. The reinforcing device forms certain connection on adjacent anchor rod bodies installed on the surface of a rock mass through adjusting plates, the reinforcing device comprises a connecting plate, the two sides of the surface of the connecting plate are slidably connected with the adjusting plates correspondingly, and a plurality of evenly-distributed clamping grooves are formed in the surface of the connecting plate; an installation shaft is rotatably arranged on the surface of one side of the adjusting plate, the installation shaft is fixedly connected with the surfaces of the trays, and rotating shafts are installed on the two sides of the surface of the adjusting plate respectively. The use effect and functionality of the anchor rod are improved, and the application range of the anchor rod is widened.

The invention discloses a full-space active and passive reinforced supporting method for a deep roadway, and relates to the technical field of deep roadway supporting. The method comprises the following steps: S1, obtaining a roadway surrounding rock structure, ground stress and surrounding rock physical and mechanical parameters; s2, determining the ranges of a broken area, a plastic area and an elastic area of the surrounding rock of the deep roadway; s3, variable-diameter pressure relief drill holes are constructed to reduce the surrounding rock stress; s4, an anchor net is supported, and concrete is sprayed to block the surface of the surrounding rock; s5, grouting reinforcement is conducted, and anchor rod cables are installed; s6, a full-space concrete filled steel tube support is erected; and S7, a roadway bottom plate is poured, and concrete spraying is conducted on the surface of the surrounding rock so that the support can be embedded. According to the surrounding rock control method, active bearing of the roadway surrounding rock and passive supporting of the full-space support can be effectively coordinated, the cooperative bearing capacity of the deep roadway can be improved, and safety and stability of the deep roadway are guaranteed.

The invention provides an anchor-plate-injection collaborative supporting method for active water sealing. The anchor-plate-injection collaborative supporting method is applied to various laneways penetrating through water-containing stratums, especially to construction of vertical shafts constructed through a freezing method. During freezing method construction, a freezing wall is formed firstly, a section height is excavated, an anchor rod is drilled and constructed after the section height is excavated, and if water exists after excavation, forced drainage needs to be carried out to enable the displacement to be larger than the water inflow so as to ensure that no accumulated water exists on a working face; the steel plates are fixed through anchor rods, so that grouting gaps are formed between the steel plates and the well wall; a gap between the bottom edge of the steel plate and the well side is blocked by a certain height through foam; grout is injected through a grouting pipe on the lower portion of the steel plate, and a primary supporting structure is formed after solidification; secondary and more supporting can be carried out immediately or after primary supporting of multiple section heights is formed, and a permanent supporting structure is formed. A traditional passive waterproof mode is broken through, and active water plugging can be achieved; the method adapts to various construction methods and stratums; the temporary support is essentially different from a traditional anchor-shotcrete net temporary support, and the construction efficiency is higher.

The invention belongs to the technical field of mining construction, and particularly relates to an artificial roof structure and a construction process thereof. The construction process comprises the steps that S1, anchor rod holes are constructed in the positions, 1 m away from a bottom plate, of two sides of a stope, S2, ore cushion layers with the thickness of 200 mm are laid and leveled, S3, I-shaped steel bottom beams are erected and fixed through round steel anchoring parts and welding base plates, S4, a reinforcing mesh is laid, main ribs and auxiliary ribs are bound in a crossed mode and welded to anchor rods, according to the composite structure design of the double-layer reinforcing mesh, the steel wire mesh and the hanging bar system, a three-dimensional stress system is formed, the bending resistance and the shearing resistance of the false roof are remarkably improved, the problem that a traditional false roof is prone to cracking and sinking is solved, and the false roof has the advantages of being simple in structure, convenient to use, economical and practical. Due to the layered matching design of the full-tailing cemented filling body, the bearing strength is guaranteed, seamless roof contact is achieved, the risk of roof hollowing is reduced, the pressure of stope operation circulation is relieved, the ore removal efficiency is improved, and the mining cost is reduced.

The utility model relates to a constant-resistance yield anchor rod and anchor cable, and belongs to the technical field of civil engineering, rock and soil slope treatment and mining engineering supporting. The anchor rod comprises a yield pipe, a rod body, an extrusion head and a force transmission system, the yield pipe is a straight circular steel pipe, periodic indentation lines are arranged on the middle section of the outer wall of the yield pipe, and constant-resistance energy absorption is achieved through gradual buckling deformation of the indentation lines; the rod body penetrates through an inner cavity of the yield pipe, an extrusion head with hardness higher than that of the pipe wall is fixed at the near end, and a birdcage-shaped expanding device is arranged at the far end to enhance anchoring; the force transmission system ensures the load transmission efficiency through a supporting base plate and a force transmission ring. According to the utility model, the contradiction between material strength and ductility is converted into controllable buckling deformation through structural collaborative design, and the controllable buckling deformation anchor rod has the advantages of low cost, long displacement energy absorption (millimeter-meter level), controllable bearing capacity level (yield pipe > extrusion head > rod body), multi-scene adaptation and the like, and is suitable for rock-soil body support under the conditions of earthquake, rock burst and large deformation of surrounding rock.

The invention discloses a multifunctional all-in-one unit for drilling and blasting method construction and a construction technology, and relates to the technical field of tunnel construction, the multifunctional all-in-one unit comprises a rack assembly, a left drilling arch arm frame, a left drilling arm frame, a vertical arch arm frame, a right drilling arm frame, a right drilling arch arm frame, a guniting arm frame, a pumping system, a hydraulic system and an electrical system; a vertical arch module of the left drilling arch arm frame, a vertical arch module of the vertical arch arm frame and a vertical arch of the right drilling arch arm frame snatch a left arch frame, a middle arch frame and a right arch frame to carry out arch erecting and mesh welding operation; a charging hanging basket is arranged at the front end of the rack assembly; the rock drilling modules of the left drilling arch arm frame and the right drilling arch arm frame work independently or cooperatively in cooperation with the left drilling arm frame and the right drilling arm frame and are used for drilling anchor rod holes and blast holes. According to the invention, multiple functions such as drilling of blast holes, charging of a hanging basket, blasting, erecting of meshes, anchor rod operation, guniting and the like can be integrated, parallel working procedures or seamless connection of the working procedures can be realized, and the construction progress can be greatly improved.

The invention discloses a deep mine rockburst risk dynamic assessment and active prevention and control system, and relates to the technical field of rockburst risk assessment and prevention and control. Comprising a data acquisition module, a preprocessing module, a dynamic evaluation module, an active prevention and control decision module, a prevention and control execution module, a system monitoring and feedback module and a data storage and authority management module, is interacted through a mining intrinsic safety type communication network, adapts to underground working conditions and supports 24-hour operation; the data acquisition module deploys multiple types of monitoring equipment, and dynamically adjusts frequency encryption transmission; the preprocessing module filters noise and interpolates to ensure data integrity; the dynamic evaluation module updates the risk level in combination with indexes and algorithms; the decision-making module matches the prevention and control scheme and needs to be audited; the execution module is in butt joint with equipment control parameters; the monitoring module measures the state calculation effect; and the storage and authority module performs dual-backup, and performs hierarchical authorization trace leaving. According to the method, the problems of lag and low efficiency of traditional rockburst prevention and control are solved, evaluation accuracy and prevention and control efficiency are improved, risk closed-loop management is realized, safety and cost are balanced, and mining safety is guaranteed.

The invention relates to a segment reinforcing device for a shield tunnel and a construction method thereof, a steel ring is matched with a to-be-reinforced shield tunnel segment, one side of the steel ring is open, two steel corbels are located on the two opposite sides of the open end of the steel ring respectively, the outer circumferential wall of the steel ring is attached to the inner circumferential wall of the to-be-reinforced shield tunnel segment, and the outer circumferential wall of the steel ring is attached to the inner circumferential wall of the to-be-reinforced shield tunnel segment. The steel ring is fixedly connected with a to-be-reinforced shield tunnel segment through a chemical anchor bolt, and the outer walls of the two steel corbels are used for being connected with the two opposite side walls of a ballast bed in the to-be-reinforced shield tunnel segment in an attached mode correspondingly; the construction process comprises the steps of obtaining the curvature radius of the arc-shaped steel plate, manufacturing the steel ring, changing the row of the pipeline, installing the segment reinforcing device and recovering the pipeline. Compared with a traditional shield tunnel segment reinforcing mode, the strength of the shield tunnel segment is improved, meanwhile, the posture of the shield tunnel segment can be kept consistent with the posture of an existing shield tunnel segment, the normal use function of a shield tunnel is not affected, the space of the shield tunnel is not occupied, and the risk of deformation of the shield tunnel segment is reduced.

The invention discloses an anchor rod and grouting combined reinforcement control method for surrounding rock of an argillaceous weak cemented roadway, relates to the technical field of coal mine roadway support, and solves the problems of poor anchoring performance of an anchor rod, insufficient grouting pertinence and poor grouting and anchoring collaboration in the prior art. According to the technical scheme, the method comprises the steps that grouting and supporting parameter collaborative design is conducted; after roadway tunneling, full-section concrete spraying sealing is immediately carried out; deep and shallow hole step-by-step differential grouting is conducted, shallow hole low-pressure permeation is conducted firstly to form a shallow reinforcing ring, and then deep hole high-pressure splitting is conducted to form a deep reinforcing area; and finally, high-pretightening-force anchor rods (cables) are installed to form a cooperative bearing body. The reinforcing ring layer with the reasonable strength gradient is formed, efficient cooperation of surrounding rock modification and active supporting is achieved, and the supporting reliability and the overall stability of surrounding rock are remarkably improved.

The invention provides a multi-source dynamic disturbance rockburst combined support prevention and control system and method, and relates to the technical field of rockburst disaster prevention and control, the system comprises stress release holes, wave-absorbing grouting holes, energy-absorbing anchor rods and a passive pressure-bearing structure; the stress release holes are formed in a rockburst high-risk area of the tunnel surrounding rock; the wave-absorbing grouting holes are distributed around the rockburst high-risk area in a staggered mode, the wave-absorbing grouting holes are filled with wave-absorbing grouting materials, and a three-dimensional wave-absorbing grouting area is formed; the energy-absorbing anchor rod is arranged in the three-dimensional wave-absorbing grouting area; the passive pressure-bearing structure comprises a quick-setting concrete layer, a concrete layer containing rubber particles, a steel arch and a steel fiber concrete layer, the concrete layer containing rubber particles is arranged behind the reinforcing mesh, the steel arch is arranged behind the concrete layer containing rubber particles, and steel fiber concrete is arranged behind the steel arch. By constructing the pressure relief-wave absorption-energy absorption-passive pressure bearing four-stage combined supporting system, the safety and adaptability of the supporting system for the rockburst high-risk area are remarkably improved.

The utility model discloses a coal mine tunnel side anchor rod or side anchor cable drilling construction drill rod accurate righting device, relates to the technical field of coal mine tunnel anchor rod (cable) supporting, and solves the problems of poor adaptability and universality caused by limited adjusting capacity of a stabilizing device in the prior art. The device comprises a pair of bases, the two bases are adjustably connected through a distance adjusting structure, stand columns are fixedly arranged on the bases, a cross beam is arranged on the stand columns, a height adjusting structure is arranged between the stand columns and the cross beam in a matched mode, a supporting table is arranged on the cross beam, and a position adjusting structure is arranged between the supporting table and the cross beam in a matched mode. According to the device, vertical movement and drilling angle adjustment of the side anchor rod (cable) drilling can be achieved according to the size of the section of a roadway, the drilling construction quality can be guaranteed, conditions are created for reliable anchoring of the anchor rod (cable), the device is simple in structure and convenient to operate, and accurate drilling positioning in the roadway side anchor rod (cable) drilling construction process is easy to achieve.

The invention relates to small-section rock tunnel construction integrated equipment and a construction method. The small-section rock tunnel construction integrated equipment comprises a heading machine, a spraying mechanism, a supporting mechanism and a transport vehicle, wherein the spraying mechanism and the supporting mechanism are carried on a heading machine vehicle body, and the transport vehicle corresponds to a slag outlet of a cantilever type heading device. The concrete wet spraying device and the anchor rod drilling device are carried on the upper portion of the cantilever type heading machine body, and uninterrupted continuous operation of tunneling, deslagging and supporting can be achieved by reasonably arranging the positions and the operation sequence of the concrete wet spraying system, the anchor rod drilling device, the deslagging vehicle and the concrete mixer truck. And meanwhile, participation of constructors is effectively reduced, manpower is saved, and the efficiency and safety of tunnel construction are improved.

The invention discloses a spiral ground pile group anchoring system and method based on force decomposition synergy. The system comprises two spiral ground piles, an auxiliary mooring rope with the two ends connected with the ground piles and a main cable arranged between the auxiliary mooring rope. When the main cable is pulled, the auxiliary cable is forced to form a break angle by tensile force, and the two ground piles are mutually tensioned by horizontal component force generated by decomposition of the tensile force, so that a soil body between the piles is powerfully compacted. The compacted soil forms high-strength constraint, the uplift bearing capacity of the whole system is remarkably improved, and the synergistic purpose of '1 + 1gt, 2' is achieved. The device is simple in structure, low in cost, remarkable in synergism and particularly suitable for being matched with a double-head pile driver (a full-electric unmanned multi-foot double-head reverse spiral ground pile driver used in a low-adhesion environment and a cooperative control method thereof 2025120033595) to achieve rapid deployment.