16486results about "Shaft lining" patented technology

The embodiment of the invention provides a tunnel grouting method and device, and a grouting balance prediction system is constructed by combining a machine learning model and a numerical manifold method. By analyzing critical value characteristics of a pressure-volume curve and combining grouting flow and rock mass displacement data, model training is performed, and accurate prediction of the grouting state is realized. The system adopts a Bingham fluid model and a fluid-solid coupling model to calculate optimal grouting parameters, correction is carried out through a zero-thickness cohesion unit model, and automatic regulation and control of a grouting pump are achieved. According to the method, the defects of the traditional technology in parameter optimization and process control are effectively overcome, a scientific basis is provided for grouting construction of tunnel engineering, and the grouting quality and efficiency are remarkably improved.

The invention relates to the technical field of construction trolley equipment, in particular to three-layer overlapping assembly type underground station assembling trolley equipment which comprises a movable pedestal, a movable platform, a movable platform, a movable platform, a movable platform and a movable platform, wherein the movable pedestal is provided with a shear-type lifting platform which ascends and descends in the vertical direction; the fixed frame seat is fixedly mounted on the shear type lifting platform; the side wall assembling assembly comprises a horizontal connecting plate which is horizontally and movably mounted on one side of the fixing frame base and an L-shaped supporting plate which is mounted at the outer end of the horizontal connecting plate; the moving block is horizontally and movably mounted on the other side of the fixing frame base through a driving source, and a longitudinal beam supporting plate and a clamping jaw are mounted on the moving block; the arranged movable pedestal is matched with the fixed frame seat, so that a lifting function and a mounting site are provided, and the device can be suitable for splicing operation of a three-layer overlapping assembly type underground station; the equipment has mobility, the structure is stable and reliable in the construction process, and the requirement for gravity bearing of the prefabricated part can be met; quick positioning and assembling of the assembling position of the prefabricated part can be achieved, then the construction procedure is simplified, and the construction efficiency is improved.

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 relates to the technical field of tunnel engineering, and discloses an intelligent regulation and control shield segment crack minimally invasive repair method, which comprises the following operation steps: intelligently identifying a crack, comprehensively scanning a shield segment by using high-definition camera equipment, obtaining a high-definition image of the surface of the segment, and obtaining a high-definition image of the surface of the segment by applying an image processing technology and a deep learning algorithm. The image is analyzed and processed, key parameters such as the position, the width, the length and the depth of the crack are automatically identified, a crack three-dimensional model is constructed, and accurate data support is provided for subsequent minimally invasive repair; and making a minimally invasive repair scheme, and combining factors such as a segment material and a stress condition according to a crack identification result. According to the intelligent regulation and control shield segment crack minimally invasive repair method, accurate recognition, minimally invasive treatment and effect evaluation of shield segment cracks are achieved, and the purposes of improving the repair efficiency, reducing the construction risk and ensuring the safety and stability of a tunnel structure are achieved.

The invention discloses a high and large formwork engineering supporting system construction method, and belongs to the technical field of building engineering. Comprising the following steps: step 1, arranging intelligent nodes in a high and large template support system to realize information sharing and group cooperative regulation and control among the nodes; step 2, dividing the support system into a plurality of mutually associated load control areas, and setting differentiated load control parameters; step 3, automatically optimizing a pouring path; 4, when the concrete strength reaches a preset threshold value, the supporting rigidity or the reserved deformation amount is automatically adjusted according to a preset program, and the concrete structure bears the dead weight step by step; 5, the temporary load is automatically compensated, when the load exceeds a safety threshold value, a load redistribution mechanism and a reinforcing device are triggered, meanwhile, an alarm is started, and abnormal data are pushed; and step 6, continuously optimizing control parameters, accumulating construction data, constructing a digital construction record and a knowledge base, and realizing intelligent iterative upgrading of the construction method.

The invention discloses a deep water-rich weak-impact coal seam surrounding rock control method based on rapid tunneling, and relates to the technical field of surrounding rock control. The method comprises the steps that S1, a high-risk area is identified through address detection, a waterproof curtain is constructed, and the tunneling disturbance risk is reduced; s2, rapid tunneling and instant supporting are conducted, the surrounding rock exposure time is shortened, tunneling and supporting are completed synchronously, and deformation development is restrained; s3, sensing a surrounding rock-support response in real time, optimizing parameters and early warning risks, and realizing dynamic monitoring and feedback regulation and control; s4, later-stage continuous reinforcement maintenance is conducted, so that the roadway adapts to the rheological characteristics of deep surrounding rock, and the service cycle of the roadway is prolonged; according to the method, a high-risk area is identified through various detection technologies, and instant supporting is achieved through cutting process optimization and digging and supporting collaborative operation; real-time monitoring and dynamic feedback are achieved, and automatic optimization of supporting parameters is achieved; and later reinforcement and periodic maintenance are adopted to ensure that the surrounding rock supporting system can adapt to the rheological characteristics of deep surrounding rock for a long time.

Provided in the present invention is a construction method for a karst tunnel to extend through a karst cave. The construction method comprises the following steps: (1) excavation expansion and support for a karst cave; (2) dredging of the base of the karst cave, and backfilling; (3) inverted-arch and filling construction; (4) water-stop wall construction, and concrete backfilling on two sides; (5) initial support construction; (6) initial-support top backfilling and waterproof-layer construction; (7) secondary-lining waterproofing and drainage construction; (8) mounting and debugging of a water pressure monitoring system; and (9) implementation of a monitoring and early-warning scheme. The construction method is suitable for engineering in unfavorable geological conditions, for example, a water-rich karst tunnel extending through large underground karst caves, karst troughs and underground rivers. In the construction method, the operation difficulty of the steps is relatively low, the construction quality is controllable, there are few construction blind areas, and the safety of construction is relatively high; the initial runoff balance of karst cave underground water can be maintained, and thus the surrounding ecological environment can be protected to the maximum extent.

The invention provides a shield tunnel construction period segment longitudinal dynamic floating prediction method, and relates to the field of shield tunnel segment floating prediction.The method comprises the steps that the static upward floating force and the dynamic upward floating force of a shield tunnel are calculated by considering the timeliness of slurry, and the characteristic of nonlinear change of the rigidity of a circular seam connector is considered; the method comprises the following steps: dividing bending-resistant and shearing-resistant deformation modes of a circular seam joint, further deducing bending rigidity and shearing rigidity of a tenon-type joint in each deformation stage, deducing a shield tail segment longitudinal floating prediction model of the circular seam joint in the shield tunnel construction period, and constructing a nonlinear iterative algorithm of shield tunnel longitudinal deformation according to the theories; and acquiring parameter data of actual engineering, and inputting the parameter data into the duct piece floating prediction model to obtain a duct piece floating value. By means of the method, accurate prediction of floating deformation of the shield tail segment in large shield tunneling can be achieved, an effective scientific basis is provided for large-diameter shield tunneling construction, the problems that parameter decision of shield tunneling machine operators is difficult, and the segment floating control effect is poor are solved, and structural diseases caused by too large floating of the shield tail segment are eliminated.

The invention relates to the technical field of metal mine ultra-deep vertical shaft construction, in particular to an advanced pressure relief construction method for a metal mine ultra-deep vertical shaft, aims to solve the problems that the construction safety of a deep shaft is difficult to guarantee and the construction difficulty is high, and is used for a large-diameter vertical shaft with the depth exceeding 1500 m. The lithology and physical mechanics parameters of shaft surrounding rock are obtained by adopting methods such as shaft rock core logging, surrounding rock joint fissure investigation and rock mechanics tests; then mechanical properties of the shaft surrounding rock are analyzed, and shaft surrounding rock excavation disturbance stress field distribution characteristics are obtained; the supporting opportunity and the supporting thickness of the well wall concrete lining are determined, high stress accumulated in a rock mass is released through advanced pressure relief blasting, so that the stress state of the shaft surrounding rock of the non-lining section is actively regulated and controlled, the interaction between the shaft surrounding rock and the subsequent well wall concrete lining is weakened, and the construction difficulty is effectively reduced; various means such as shaft stratum transparency analysis and ground pressure disaster prevention and control early warning are adopted, and safety and high efficiency of digging and supporting construction of the ultra-deep shaft are guaranteed.

The invention relates to the field of building structure reinforcement, in particular to an external bolt prestress tensioning device suitable for a tunnel segment joint. Comprising a fixed end mechanism, a tensioning end mechanism, a cambered surface self-adaptive bolt, a prestress bolt and a locking nut, the fixed end mechanism and the tensioning end mechanism each comprise a horizontal supporting plate, and the bottoms of the ends, away from each other, of the two horizontal supporting plates are fixedly connected with vertical supporting plates correspondingly; a screw rod part of the prestress bolt sequentially penetrates through a through hole in the vertical supporting plate of the fixing end mechanism and a through hole in the vertical supporting plate of the tensioning end mechanism and is provided with a locking nut, the tops of the ends, away from each other, of the two horizontal supporting plates are fixedly connected with lug plates correspondingly, and fixing holes are formed in the two lug plates correspondingly. The device provided by the invention is completely fixed on the surface of the to-be-reinforced structure in a mechanical contact mode, destructive drilling on the structure is not needed, and damage to the interior of the structure is avoided.

The invention relates to the field of coal mine underground roadway supporting processes, and discloses a roadway supporting process for regional high-stress discrete solidification. The method comprises the steps of geological exploration and stress testing, roadway support processing, support sorting, parameter determination and real-time monitoring and feedback, in the roadway support processing, a stress data processing module is constructed, stress data around a roadway are discretized into a plurality of area units, support sorting is conducted on the area units, and the roadway support processing module is constructed; and the high-stress area and the secondary high-stress area are sequentially subjected to supporting construction, parameters of anchor rods and anchor cables are determined before supporting construction, and the supporting effect is ensured. According to the roadway supporting method suitable for regional high-stress discrete solidification, the stability of the roadway is enhanced, the service life is prolonged, and the safety is improved by perfecting the supporting process.

The invention discloses sprayed concrete suitable for a high geothermal tunnel environment and a preparation method of the sprayed concrete. The sprayed concrete is prepared from cement, hollow glass beads, modified hydrophobic aerogel, coarse aggregate, fine aggregate, water, an additive, silica mortar, a high-temperature applicable accelerator and the like. The high-strength hollow glass beads and the aerogel are introduced as thermal insulation aggregates, the hollow glass beads are graded and optimized by adopting three particle sizes, and the aerogel is hydrophobically modified by adopting a co-precursor method, so that the heat conductivity coefficient of the sprayed concrete can be greatly reduced and the thermal insulation performance of the sprayed concrete can be improved by introducing the high-strength hollow glass beads and the aerogel; the silicon mortar and the high-temperature applicable accelerator are introduced, so that the working performance of the sprayed concrete can be improved, and the high-temperature stability of a hydration product is guaranteed. The application of the sprayed concrete can effectively reduce the cavern temperature in a high-ground-temperature tunnel and weaken the influence of a high-temperature environment on the long-term performance of the sprayed concrete, so that the service life of the sprayed concrete in the high-temperature environment is effectively prolonged.

The invention discloses an underground engineering dynamic water step grouting plugging and leakage stopping method capable of detecting a water flow channel, and belongs to the technical field of underground engineering grouting and water plugging. The method comprises the steps that firstly, in the underground engineering mining process, a water leakage area is surveyed and detected, and the general channel and position of flowing water flow are judged; a grouting hole arrangement scheme is set, and step-by-step grouting is carried out; in the water leakage area, viscous slurry obtained by mixing a first grouting material A and a first grouting material B is used for blocking the flowing water channel; after the flowing water channel is blocked, a second grouting material is injected to reinforce the total cross section of the water leakage area; finally, the flowing water and gushing conditions of the grouting holes and the water flow channels are observed, theoretical knowledge is combined for checking, and the grouting and water plugging effect is analyzed. According to the method, the grouting and water plugging effects are improved by adopting the methods of reconnaissance and detection, step-by-step grouting and nondestructive detection, effective plugging and reinforcement of a water leakage area are realized, and the safety and stability of an underground structure are ensured.

The invention relates to an intelligent trolley monitoring method and system based on a cloud platform, and the method comprises the steps: collecting multi-source data of a trolley in a construction process, and the multi-source data comprises sensor data and video monitoring data; preprocessing the multi-dimensional data through edge computing equipment, and uploading the preprocessed data to a cloud platform for centralized processing and storage; the preprocessed data are analyzed, the construction state of the trolley is recognized, the construction state analysis result of the trolley is generated, and the construction state comprises the trolley operation state, the concrete pouring state and the lining quality; and dynamically adjusting construction parameters of the trolley according to a construction state analysis result of the trolley. The construction method has the effect of improving the construction quality.

The invention provides a gob-side roadway roof cutting pressure relief supporting structure and method, and belongs to the technical field of coal mining construction. And the inclined coal seam roof-cutting pressure-relief coal-pillar-free asymmetric roadway support is realized. According to the technical scheme, the system comprises a gob-side roadway formed along the inclined coal seam and an anchor net beam grouting comprehensive supporting system arranged on the gob-side roadway; and a waste rock blocking device is arranged in the gob-side roadway. The method has the beneficial effects that after the holes are drilled in the rock stratum, the pulse waves are used for conducting directional fracturing on the rock stratum, the kerfs are formed between the adjacent drill holes, directional cutting of the basic roof and the immediate roof of the gob-side entry retaining is achieved, after working face recovery, the basic roof is subjected to shear fracture in the pre-splitting kerfs, the length of a lateral cantilever is reduced, and pressure relief is completed. And meanwhile, for a fracture surface which is seriously impacted by roof crushing and goaf gangue tumbling, a composite supporting system is formed in a way of filling high-water materials beside a roadway and bolting-grouting supporting in combination with early-stage anchor net cable supporting.

The invention provides an intelligent safety and stability assessment method, system and device for an underground cavern and a medium, and the method comprises the following steps: S1, building a three-dimensional geological model of the underground cavern according to initial geological exploration data; s2, multiple monitoring instruments are pre-buried in key parts of the underground cavern, and monitoring data are collected in real time; s3, constructing an underground cavern safety and stability evaluation model based on a deep learning algorithm; s4, inputting real-time monitoring data into an evaluation model, combining historical monitoring data and geological model information, analyzing and comparing with a three-dimensional numerical calculation result, adjusting geological parameters, performing reconstruction evaluation, and outputting a safety and stability level; and S5, according to an evaluation result, automatically generating early warning information and processing suggestions. According to the method, the problems of poor real-time performance and low data utilization rate of traditional evaluation under complex geological conditions are solved, and the intelligent level of construction safety monitoring of underground cavern groups such as hydropower stations and pumped storage projects can be effectively improved.

The invention discloses an intelligent curing method and system driven by sensing of an internal temperature and humidity field of concrete. The intelligent curing method comprises the following steps that the surface tensile strength and the elastic modulus of the concrete of the same concrete mix proportion and different ages are obtained; according to the concrete maturity theory and the concrete surface tensile strength of different ages, a fitting function of the concrete surface tensile strength is obtained; predicting a fitting function through the elastic moduli of different ages and the elastic moduli; obtaining the inner surface control temperature difference of the concrete at different ages by utilizing the relationship between the concrete surface tensile strength and the concrete surface tensile stress and combining the fitting function of the concrete surface tensile strength and the elastic modulus prediction fitting function; and the concrete curing environment temperature and humidity are intelligently controlled according to the inner surface control temperature difference of the concrete of different ages. By dynamically determining the concrete curing temperature control index and combining with the humidity requirement, the on-off of the curing equipment is controlled, and the temperature and humidity of the concrete curing environment are intelligently controlled.

The invention relates to the technical field of mine safety, and provides a cross-layer roadway multi-rock-stratum rigidity matching collaborative segmented supporting method which comprises the steps that plastic zone ranges of different rock stratum areas in a cross-layer roadway are determined, and rock stratum joint fissure zones and weak intercalated layers are identified; monitoring the elastic zone rigidity and the plastic zone weakening rate of the surrounding rock, constructing a surrounding rock mechanical model, obtaining the supporting structure rigidity for inhibiting the expansion of the plastic zone through the surrounding rock mechanical model, and constructing a supporting structure according to the supporting rigidity; and the reinforcing material is sprayed to the surface of the surrounding rock through high-pressure jet flow to form a protective layer. Through the cooperative control thought of weak layer control, rigidity adjustment and resistance transfer, breakthrough transformation of crossing roadway support from passive defense to active control is achieved, according to a scientific surrounding rock mechanical model, the rigidity of the support structure can effectively inhibit expansion of a plastic zone, the stability of a system is maintained, and the stability of the system is improved. And finally, an ultrahigh strength performance and gradient spraying layer structure technology is adopted, so that the compression strength and the shear strength of the surrounding rock are remarkably improved.

The invention discloses an inorganic two-component grouting material for a mine and a preparation method and application thereof, and belongs to the technical field of inorganic grouting materials. The weight ratio of the component A to the component B is (0.3-1.2): 1, and the component A comprises superfine Portland cement, silicon powder, an expanding agent, a water reducing agent, a retarder, lithium carbonate, cellulose ether, a defoaming agent and latex powder; the component B comprises sulphoaluminate cement, slag, an expanding agent, a water reducing agent, lithium carbonate, cellulose ether, a defoaming agent, latex powder and a retarder; the weight ratio of the slag to the sulphoaluminate cement is (3.5-5.6): 1, and the weight ratio of the superfine Portland cement to the sulphoaluminate cement is (2.5-4): 1. The inorganic double-component grouting material for the mine can be rapidly solidified and has the functions of water plugging and reinforcement.

The present invention discloses a crack-resistant ultra-high performance concrete (UHPC) for underground engineering in water-rich strata, preparation method, and application thereof, belonging to the technical field of building materials. The concrete is prepared from the following raw materials in parts by weight: 550-650 parts of cement, 140-180 parts of fly ash, 120-150 parts of silica fume, 200-300 parts of calcined shield tunnel slag, 30-50 parts of micron-scale magnesium oxide, 30-50 parts of nano-scale magnesium oxide, 30-50 parts of rheology-modifying material, 800-1000 parts of lightweight aggregate, 4-8 parts of water reducer, and 50-200 parts of water. The rheology-modifying material has a fluidity ratio of 106%. The present invention incorporates calcined shield tunnel slag, micron / nano-scale magnesium oxide, and lightweight aggregate into the UHPC, which effectively suppresses shrinkage and reduces crack formation.

The invention discloses an outgoing line shaft slip-form lining construction method, which belongs to the field of building construction, and comprises the following steps: construction preparation, completion of survey lofting of a shaft construction area, power supply, arrangement of a water supply and communication system, and slip-form manufacturing, installation and debugging. A lifting frame, a supporting frame, a vertical back ridge, a hydraulic jack, a supporting rod, a material distribution platform, a central rotary material distribution mechanism and a chute device are sequentially installed, and debugging and sliding and lifting testing of a hydraulic system are completed; slip form sliding and lifting and concrete pouring are conducted, construction is conducted in the three stages of initial sliding, normal sliding and lifting and sliding and lifting completion, and the concrete quality is ensured through layered pouring and accurate vibration; the construction precision of the slip form is controlled, deviation is monitored in real time through a laser swinger, a limiting and leveling device and a vertical monitoring system, and deviation correction measures are taken when the deviation exceeds 1.5 cm; and the sliding formwork is dismantled, specifically, the formwork is dismantled step by step after sliding formwork construction is completed. By optimizing the construction process and accurately controlling the technology, the construction efficiency and the concrete quality are remarkably improved.

The invention discloses a tunnel bottom plate longitudinal needle beam slip form trolley. The tunnel bottom plate longitudinal needle beam slip form trolley comprises a formwork assembly, a hopper, a chute, a needle beam, a hydraulic advancing device used for pushing the formwork assembly to move along the needle beam, a movable supporting leg, a front supporting leg, a rear supporting leg and two sets of anti-floating devices. The hydraulic advancing device is arranged so that the formwork assembly can walk in the length direction of the needle beam, after the formwork assembly walks to the limit, conversion of another working section of the needle beam and the other working section of an assembly of the needle beam is achieved through supporting of the movable supporting legs and the formwork assembly, and continuous pouring of adit bottom arch concrete is achieved within the length range of the needle beam. Calendaring and plastering can be performed in time before initial setting of the concrete, bubbles on the surface of the concrete are eliminated, and the apparent quality of the concrete is improved; the trolley can walk without independently arranging an external track, so that the labor and tool amortization cost is reduced; the bottom arch trolley is suitable for bottom arch lining construction of different section ranges with the same inner diameter.

The invention relates to a gob-side entry retaining grouting reinforcement technology in the field of mining engineering, provides a method for grouting reinforcement of a reuse roof of a gob-side entry retaining of a coal mine and accurate control of the grouting amount, and aims to realize real-time monitoring and control of the grouting amount in the grouting process. According to the method, pressure monitoring, flow velocity monitoring, low-frequency electromagnetic wave detection, ultrasonic detection and on-site drilling slurry discharge monitoring are combined, the grouting process is detected in real time through multiple monitoring means, and it is ensured that cement slurry fills cracks and does not flow into a goaf. And meanwhile, cement paste with different particle sizes is adopted for grouting step by step according to the size of the crack, and paste leakage is avoided while the filling effect is guaranteed. The method is suitable for grouting operation under complex geological conditions, has the characteristics of high efficiency and accuracy, and remarkably improves the stability and safety in the use process of a roadway.

The invention relates to the field of constructional engineering concrete detection, in particular to a reamer bit and a concrete repairing method.The reamer bit comprises a mounting base, at least two drill arms and at least two supporting rods; one end of the drill arm is hinged with the mounting seat, a fixing pipe is arranged between the hinge points of the drill arm and the mounting seat, the fixing pipe is connected with a positioning rod in a sliding manner, one end of the supporting rod is hinged with the positioning rod, and the other end of the supporting rod is hinged with the drill arm. When the reamer bit is used, the angle of the drill arm can be flexibly adjusted by pressing the positioning rod, the hole diameter of a reaming hole can be accurately controlled according to actual repairing requirements, and the reamer bit is suitable for repairing scenes of coring holes of different sizes and depths; the formed horn mouth with the wide inside and the narrow outside can be embedded into original concrete like a tenon after concrete is poured, the combining capacity of new concrete and old concrete is greatly improved, and it is guaranteed that a repaired area is not prone to separation.

The invention provides a multi-dimensional supporting leg structure for lightweight steel ring splicing equipment, and relates to the field of tunnel engineering. The mounting base is fixedly connected with the frame, the telescopic driving mechanism is arranged between the mounting base and the supporting leg assembly, the angle adjusting mechanism is arranged between the cylinder barrel and the mounting base, and the self-locking mechanism is used for locking the cylinder barrel and the piston rod when the driving unit fails. The telescopic driving mechanism is composed of a cylinder barrel, a piston rod and a driving unit, the angle adjusting mechanism is driven through a first rotating shaft and a second rotating shaft which are perpendicular to each other and corresponding rotation, so that the cylinder barrel achieves double-shaft swing adjustment, the self-locking mechanism is composed of a locking rack, a movable tooth claw, a reset spring, an electromagnet and a permanent magnet, and power-on unlocking and power-off self-locking are achieved. According to the structure, the supporting polygon is obviously enlarged under the complex basic condition, the anti-overturning stability of equipment is improved, reliable supporting is kept when a hydraulic system fails, and the safety and adaptability of steel ring splicing operation in a tunnel are improved.

The invention provides a tunnel prestress self-adaptive yielding steel frame and a construction method, and belongs to the technical field of tunnel engineering.The tunnel prestress self-adaptive yielding steel frame comprises supporting frame bodies and adaptive structures, and every two adjacent supporting frame bodies are connected through the adaptive structures; the adaptive structure comprises a prestress device and a yielding device which are connected in sequence, and the prestress device comprises a prestress releasing structure which tends to extend in the length direction of the prestress device; the yielding device comprises a yielding supporting structure which tends to bend in the length direction of the yielding device. The pre-applied stress of the pre-stress releasing structure is smaller than the yielding initial force of the yielding supporting structure. According to the tunnel prestress self-adaptive yielding steel frame, supporting force is applied to surrounding rock through releasing of the prestress releasing structure, and active supporting force is formed; the surrounding rock pressure is borne by using the compression deformation of the yielding supporting structure and the retraction of the prestress releasing and tensioning structure; effective combination of the prestress device and the yielding device is achieved, and the stability of the supporting structure is improved.

The invention discloses a self-sensing geopolymer composite material, and belongs to the technical field of intelligent cement base material preparation. The raw materials comprise an alkaline exciting agent, standard sand, iron tailing sand, a silicon-aluminum mineral cementing material, short carbon fibers, water, a water reducing agent and a dispersing agent. The self-sensing geopolymer composite material has multiple conductive phases which can generate a composite effect which is not possessed by a single conductive phase when being used together, multiple conductive channels can generate a synergistic or multi-scale effect (long and short range synergistic conduction), the sensing stability (repeatability) is good, the noise is low, and the self-sensing geopolymer composite material has good application prospects. The requirement for the carbon fiber mixing amount when the conductive seepage threshold value is reached and the threshold value are optimized to a certain degree, and the cost can be saved. When the device is applied to tunnel engineering reinforcement of lining segments and sprayed concrete, a tunnel supporting effect can be achieved, damage of a tunnel structure can be sensed, sensing performance is achieved without additional sensing materials / devices, nondestructive testing of the structure is achieved, and therefore the safety of the structure is improved, and the service life of the structure is prolonged.

The invention provides a mining inorganic environment-friendly reinforcing material and application thereof, and belongs to the technical field of mining reinforcing materials. A component A comprises the following components in parts by mass: 60-80 parts of anhydrite, 5-20 parts of lime, 5-10 parts of silica fume, 2-8 parts of sodium silicate, 1-0.5 part of a naphthalene water reducer, 3-7 parts of an early strength agent and 0.2-0.8 part of lithium salt; the component B comprises the following components in parts by mass: 50-70 parts of cement clinker, 10-30 parts of slag cement, 5-10 parts of iron powder, 1-8 parts of aluminum sulfate, 5-10 parts of calcium carbonate and 0.5-1 part of sodium tripolyphosphate; the component C is prepared from the following components in parts by mass: 10 to 25 parts of water glass, 10 to 20 parts of emulsion, 40 to 60 parts of water, 5 to 10 parts of high-efficiency water reducing agent and 1 to 5 parts of triethanolamine. The mining inorganic environment-friendly reinforcing material provided by the invention is low in reaction heat and is not easy to cause coal combustion.

The invention belongs to the technical field of equipment control systems, and discloses a deep well mining equipment intelligent control system which comprises a multi-source data sensing module, a decision module and an equipment cooperative control module. The multi-source data sensing module comprises a distributed Internet of Things sensing unit, an InSAR remote sensing detection unit and a data fusion gateway unit. The decision-making module receives the multi-source signal and comprises a prediction unit, an optimization unit and a regulation and control unit, the prediction unit processes the multi-source signal and outputs a height prediction signal and an aquifer penetration risk signal, and the optimization unit processes the multi-source signal and the height prediction signal to obtain an optimal grouting signal; and the regulation and control unit defines a water retention constraint condition according to the multi-source signal and outputs a safe mining threshold value. According to the intelligent control system of the deep well mining equipment, the problems of water resource loss and pollution caused by traditional deep well mining operation can be solved.

The invention relates to a method for treating shield tunnel diseases through trenchless perturbation external prestressing, and belongs to the field of tunnel structures.The method comprises the steps that the spatial position of a tunnel structure is determined, and a first vertical shaft, a second vertical shaft and a vertical shaft supporting structure are constructed; constructing a first vertical hole, and pushing the prestressed stranded wire to the bottom of the first vertical hole; the stratum is locally reinforced, then a first operation opening and a second operation opening are formed through excavation, a telescopic rod is adopted to transversely penetrate through the stratum from the second operation opening to the first operation opening, and the prestress stranded wire is pulled back to the second operation opening; the stratum is locally reinforced and excavated to form a third operation opening, then a second vertical hole is formed, and the prestress stranded wire is pulled to the third operation opening from the second operation opening; the stratum is locally reinforced and excavated to form a tensioning operation opening, a telescopic rod is adopted to transversely penetrate through the stratum from the tensioning operation opening to a third operation opening, and the prestress stranded wire is pulled back to the tensioning operation opening; and the two ends of the prestress stranded wire penetrate into the anchoring system and are tensioned, so that external prestress is applied to the tunnel structure.