474results about How to "Prevent landslides" patented technology

A recovery walking aiding robot belongs to walking aiding robots and recovery machinery, solves the problem that an existing recovery walking aiding robot is inflexible to pass through the narrow environment, simple in motion function and high in requirements for operation flexibility of users, and well meets actual recovery requirements. The recovery walking aiding robot comprises a handrail frame, a connection frame, a flat type microcomputer, an S-shaped support rod and a base plate, wherein the handrail frame is fixed with the connection frame through a linear bearing, the flat type microcomputer is installed on the connection frame through a support seat, the connection frame is arranged on the base plate through the S-shaped support rod, a control box is arranged on the base plate, and an environmental self-adaption module, a motion intention identification module, a speed control module, a falling prevention module and a motor driving module are loaded on the flat type microcomputer. The recovery walking aiding robot can automatically adapt to complex external environments, can achieve the functions of detecting and avoiding obstacles, preventing sliding and the like, provides falling prevention, and solves contradiction between dyskinesia of users and operation requirements of the robot.

The invention discloses a hard reinforced concrete revetment slope biological repairing method, which is characterized by comprising the steps of: roughing a concrete revetment and constructing drainage ditches at set intervals; digging a water collecting tank on one side of the cross of the revetment and a road, reserving an opening at the joint of the drainage ditch and the water collecting tank, and constructing a watertight concrete overflow bank; filling gravels in the water collecting tank and the drainage ditches; and welding earthwork grids by high-density polyethylene stripes on the protection slope, laying gravel cushion coats in the earthwork grids, and finally pouring biological slurry. The method has the advantages that: the whole project is stable and safe; rain flows into the water collecting tank and passes through grave areas, non-watertight sand-free concrete, a slope cushion coat, plant roots and the like to seep into rivers, so water quality is improved to a relatively large extent; when rainfall runoff is overlarge, the rain overflows from the overflow bank and passes through the graves of the drainage ditches, so the water quality is also purified to a certain extent, meanwhile the slope is protected; the biological slurry poured onto the slope is prepared from biological materials, and has certain anti-erosion strength and can be used as a substrate for plant growth, so the cost is low and the operation is simple.

The invention discloses a tunnel construction informatization dynamic monitoring system and a monitoring method thereof. The system comprises an industrial personal computer, a PLC (programmable logic controller) wireless controller, a high-configuration digital camera, a deformation monitoring sensitization part, digital display acquisition equipment, wireless transmission equipment and a dynamic design feedback device. The method includes: 1), controlling commands to be transmitted to the PLC wireless controller by a computer control main station and controlling the digital camera and the digital display acquisition equipment; 2), acquiring internal force monitoring data by the aid of the digital display acquisition equipment; and acquiring a deformation monitoring image via the deformation monitoring sensitization part by the digital camera; 3), transmitting a monitored value to the computer control main station by the aid of the wireless transmission equipment; 4), analyzing results by the computer control main station via a real-time analysis module; and 5), transmitting the analyzed results to the dynamic design feedback device, analyzing relative difference of the really monitored value and a standard value, and early warming in real time by an early warning module. The tunnel construction informatization dynamic monitoring system is scientific, safe and practical, the method is convenient, instant, fast and effective, and safety problems in construction monitoring of tunnels are avoided.

The invention relates to the field of tunnel construction, in particular to a method for constructing a metamorphic rock confined water tunnel, which solves the problems of the current method that geological disaster is easily initiated, the digging outline is difficult to control, timbering at initial stage is easy to transform and craze and the collapse is easy to occur. The method comprises the steps of: preliminarily forecasting surrounding rock level and underground water developing condition, accurately forecasting the geologic condition and the underground water developing condition by an advanced prospect hole, draining and decreasing water pressure by an advanced borehole, fixing the surrounding rock and plugging water by grouting via an advanced ductile, choosing a digging manner of tunnel trunk, determining the timbering form at initial stage, constructing a radial ductile, digging an inverted arch, pouring inverted arch concrete, and constructing a secondary lining. The construction method of the invention can efficiently control the digging outline, decrease the collapse frequency and the scale, efficiently control the transformation and cracking of the timbering at initial stage and can almost avoid the tunnel collapse by secondarily exchanging arch. The cost is decreased and the construction quality and the construction safety are efficiently promoted so as to bring excellent social benefit.

The invention discloses a preliminary bracing construction method for a tunnel with surrounding rocks containing collapsible loess and soft rocks. The method includes the following steps that a plurality of layers of advanced pipe sheds are arranged on a collapsible loess layer, and a single layer of advanced pipe shed is arranged on a soft rock layer; after the advanced pipe shed is set up, a working face is closed through sprayed concrete, a system anchor bolt is arranged on the soft rock layer, a foot locking small guide pipe is arranged at the arch springing position of the tunnel, and grouting is conducted on the rocks through permeation of the system anchor bolt and the foot locking small guide pipe; a pre-fabricated reinforcing mesh is paved on a concrete initial spraying layer formed by concrete initial spraying in a fluctuation mode, and a reinforcing mesh arranged at the collapsible loess layer is encrypted; a steel arch support is set on the collapsible loess layer, a reinforcing steel bar grid is set up at the soft rock layer, and the connecting position of the reinforcing steel bar grid and the steel arch support is welded; repeated spraying is conducted by adopting concrete spraying, and construction of tunnel preliminary bracing is finished. By means of the method, stress releasing and deformation coordination of two layers of surrounding rocks can be well controlled, operability is good, construction cost is low, and the safety is good.

The invention relates to a construction method of a soil covering tank for storing product oil and the like, which comprises the following steps of: (A) building a tank chamber of a soil covering tank: firstly, carrying out earth excavation with a method combining a back-acting shovel and manual excavation; then, manufacturing a ring beam, precasting concrete blocks on the spot according to the radian of the ring beam, and building the concrete blocks; carrying out the engineering of steel bars: welding steel bars by machining, and manually binding the steel bars on the spot; carrying out the engineering of templates and scaffolds: taking a bamboo plywood as a top plate template of a concrete thin shell of the tank chamber, designing a camber at the middle part, and taking scaffold tubes as bottom template brackets of the thin shell of the tank; then, carrying out concrete engineering and asphalt sand construction; and finally, carrying out waterproof engineering, thereby completing the construction of the tank chamber of the soil covering tank; and (B) installing a storage tank body of the soil covering tank: firstly, precasting the storage tank body; then, installing a tank bottom plate; installing the tank body, and welding the storage tank; and finally, testing and inspecting to complete the whole construction process of the soil covering tank after the construction is qualified. The invention reduces the occurrence of accidents, increases the benefit and reduces the dust emission.

The invention relates to a construction method for an underground tunnel, in particular to a construction method for a river-crossing shield tunnel crushed stratum communication channel, which is used for solving the problems of failure of stratum reinforcement, long working period, high cost, poor quality and the like existing in the construction process of the conventional river-crossing shieldtunnel crushed stratum communication channel. The method comprises the following steps of: determining the position of the communication channel; before opening, performing pre-grouting to integrallyconsolidate broken rock outside the excavation outline of the communication channel; forming a high-strength waterproof curtain; before excavation, performing stress conversion; drilling and partitioning to remove a left line pipe sheet, brushing the top, performing tunnel excavation with a combined damping burst technology, and timbering; and drilling and partitioning to remove a right line pipesheet, brushing the top, and performing second lining construction by adopting a combination template. Due to the adoption of the construction method, water seepage is avoided after excavation, the technology is advanced, the blank of a communication channel pre-grouting technology is fulfilled, the working period is short, the mechanical degree is high, the process is simple, construction is environmentally-friendly, collapse is avoided, and over-excavation is greatly lowered; and the method has a wide application range.

The invention discloses a combined support-excavated geologically solutional deep foundation pit and a construction method thereof. The deep foundation pit is characterized by consisting of an upper slope foundation pit and a lower vertical foundation pit; the construction method thereof comprises the steps that: in case of vertical excavation of the deep foundation pit, the periphery of the foundation pit is supported and reinforced by reinforced concrete support piles to prevent the foundation pit from collapse owing to lateral pressure of soil mass; then a high pressure jet grouting pile waterproof curtain is adopted for performing water sealing on soil mass outside the support piles and a bedrock internal grouting curtain is adopted for performing water sealing on geological situations in rocks, such as solution cavity, solution, crack and the like; and in the process of layered excavation, an annular continuous concrete slab wall is adopted for the soil mass and the rocks at the periphery of the foundation pit to form a continuous arch ring lagging. The construction method according to the invention can effectively guarantee the safe, stable, fast and effective excavation of the geologically solutional deep foundation pit.

The invention relates to a deep water silt layer geological large-span multi-line reinforcing system and a jacking culvert construction method, and aims at providing a reinforcing system and a construction method for a high-water-level, long-jacking-stroke, large-span and high-tonnage jacking culvert to penetrate through multiple existing lines. The reinforcing system comprises a high-pressure jet grouting secant pile, a fender pile, an anti-traversing pile and a supporting pile. The jacking culvert construction method comprises the steps of starry well-point dewatering, foundation pit excavation and sliding plate fabrication, frame bridge prefabrication, line reinforcement, jacking equipment installation and process control. By adopting starry well-point dewatering, the problems of underground water burst and foundation instability during jacking are solved; since a frame bridge is integrally jacked after being prefabricated, the rigidity is high, the seismic performance is good and the influence by climate is smaller; compared with the traditional construction method, the reinforcement and the installation are convenient and easy to operate, the jacking speed is quick and the construction period is shortened; I-shaped steel, steel rails and sleepers used for engineering can be recycled; the overall economic benefits are remarkable, the practical value is greater and the application prospect is wide.

The invention relates to a rescue capsule, in particular to an underground mining rescue capsule. The intension of the invention is to resolve the problems existing in the prior underground mining rescue capsule that the structure is much complicated and the resting capsule which carries escaping miners is only provided with a door, when a mining accident happens, the miners are uneasy to get in or get off in time. The capsule body of the invention has the front end provided with a front door communicated with a transfer capsule, the back end provided with a back door communicated with a service capsule, and one side of the capsule body provided with a side door communicated with a living capsule. The capsule body of the invention applies the structure of punched steel plate, reinforced by stiffener ribs, thereby the capsule body has better compression resistant and shock resistant capabilities; if the capsule body receives the impact force of 8,000 kg, the capsule body is nearly intact or little transformed, and the three doors can still be freely opened and closed. With the capsule body of the invention equipped with three doors, when the mining accident happens, miners and other personnel under ground can quickly get in the rescue capsule in the shortest time, which can maximally avoid the casualty of underground personnel.

The invention belongs to the field of open-pit mining and relates to a shape design method of a dip bedded slope of an open-pit mine in a composite coal seam. The method includes: first, acquiring step height and face angle of the dip bedded slope of the open-pit mine in the composite coal seam; second, numbering from top to bottom a plurality of weak beds in the dip bedded slope of the open-pit mine in the composite coal seam, and dividing the slope into a plurality of segments from top to bottom by using the weak beds as boundaries; third, determining a safety reserve coefficient K of the slope; fourth, determining flat plate width of the slope segment by segment from top to bottom, thereby allowing an absolute value of a difference between a slope stability coefficient of each segment and the safety reserve coefficient to be not greater than 0.01 and be satisfactory to checking calculation conditions, and meanwhile using flat plate widths of the corresponding segments as slope shape design results. The slope shape designed by the method is capable of effectively preventing landslide, ensuring maximum recycling of resources and maximizing economic benefit.

The invention discloses a unidirectional force monitoring apparatus and a monitoring method, and belongs to the technical field of sensing. The apparatus comprises a housing, the housing is of a step annular structure, the outer rim of the inner side of the housing is provided with a projection, the housing comprises an upper housing and a lower housing, the upper housing and the lower housing are symmetrically arranged at an upper position and a lower position, the two step rings of the housing form a groove, a supporting body is arranged inside a cavity formed by buckling the upper housing and the lower housing, the supporting body is of a cylinder structure which is hollow inside, the positions, which are in contact with the supporting body, of the upper housing and the lower housing are each provided with an elastic cushion, the outer side of the supporting body is successively provided with a reflection layer and a variable color ring which are disposed between the upper housing and the lower housing, the variable color ring is of a cylinder structure which is hollow inside, and a polaroid is arranged at the outer side of the variable ring. According to the invention, uniform pressure generated by a uniform load mechanism is converted into different colors through a display apparatus, and a unidirectional force is determined through observing the different colors of the display apparatus. The apparatus and method provided by the invention have great significance on construction quality management and safe production of a bolt fastening structure and anchor pole support project.

The invention discloses a road pavement structure, and particularly relates to a novel asphalt concrete pavement structure. The novel asphalt concrete pavement structure has high quick-drying and water drainage performance, is obvious in supporting effect and has certain collapsing preventive performance. A mortar bonding layer covers a base layer, cement concrete prefabricated blocks arranged in parallel and at intervals are arranged on the mortar bonding layer, the long edges of the cement concrete prefabricated blocks are perpendicular to the stretching direction of a road, a rubble layer is padded in clearances between adjacent cement concrete prefabricated blocks and covers the cement concrete prefabricated blocks, a slurry seal layer, a coarse grain type asphalt concrete layer, a medium grain type asphalt concrete layer and an asphalt mastic rubble mixed material layer cover the rubble layer from bottom to top in sequence, the base layer is a cement stabilizing aggregate base layer, and the rubble layer comprises rubbles and aggregate chips padded in the clearances among the rubbles.

The invention discloses a device and method for monitoring unidirectional force and belongs to the field of sensors. The device is constituted by a display device and a load balancing mechanism. The device comprises an upper housing and a lower housing, wherein a space formed by the upper housing and the lower housing in a snap-fit mode is provided with a supporting body and the outside of the supporting body is provided with a display device; uniform pressure produced by the load balancing mechanism is converted to different colors by the display device; the force condition is judged through observing different color of the display device. The device need no maintenance or management or inspection by specially-assigned persons, anyone can be the safety supervisor. The device is of great importance to construction quality management and safety production of anchor rod support engineering. By use of the invention, top plates are effectively prevented from falling down and coal mine safety production is guaranteed.

The invention discloses a slope reinforcing device for building municipal engineering. The device comprises a fixing frame. A protective net is mounted on the fixing frame; a fixing hole is arranged in the fixing frame; the fixing frame is fixed one a side slope through a fixing device. The fixing device comprises a hollow fixing rod and a solid fixing rod; a rod head is connected to the upper topof the hollow fixing rod, a groove is arranged in the rod head, the solid fixing rod is located in the hollow fixing rod, a stress block is connected to the upper top of the solid fixing rod, a concrete revetment is arranged at the upper top of the slope, and the concrete revetment is fixed to the slope through rivets.When the fixing device is used, firstly the hollow fixing rod penetrates through the fixing hole and is nailed into the side slope, and then the solid fixing rod is inserted into the hollow fixing rod to be nailed in. When the solid fixing rod is nailed in, the protruding blockin the hollow fixing rod is extruded, the protruding block is continuously extruded outwards, the protruding block extends outwards from the empty groove, the grabbing force of the fixing device is increased, it is guaranteed that the fixing frame and the protective net are firmly fixed and falling is avoided.

The invention discloses a high embankment slope stabilizing structure. The high embankment slope stabilizing structure comprises a retaining wall, steel pipe piles and anchor rods; the retaining wallis arranged at the foot of a high embankment slope, concrete-filled steel pipe piles are arranged on the inner surface of the retaining wall, an excavation step and a gravel drainage zone are arrangedat a filling and excavation interface, the bottoms of the concrete-filled steel pipe piles and the steel pipe piles penetrate through the gravel drainage zone, and the upper sections of the steel tube piles are sleeved with grouting sleeves correspondingly; the lower end of the grouting sleeves extend to the gravel drainage zone, the upper end of each grouting sleeve is connected with a groutingopening through a grouting pipe, a fixed pulley and a pipeline channel are arranged inside each concrete-filled steel pipe pile, the anchor rods are is fixed in a rock stratum behind the excavation step, the exposed parts of the tops of the anchor rods are connected with steel strands, and the steel strands are connected to the fixed pulleys or the steel pipe piles at the same height; the steel strands connected to the fixed pulleys are led out of crown beam through the pipeline channel and connected with a steel strand tensioning device. The high embankment slope stabilizing structure is suitable for reinforcing and active control of embankment deformation in the embankment construction and operation process, and is particularly suitable for embankment projects with high requirements forembankment stability and later operation safety.

The invention discloses a hydraulic fan-shaped support system for controlling steel frame deformation in tunnel construction. The support system is characterized in that: a steel box pedestal (1) is placed on the middle part of a tunnel step, a plurality of telescopic hydraulic cylinders (6) with steel sleeves (5) are fixed at the top of the steel box pedestal (1) in a fan-shaped mode, the steel sleeves (5) are sleeved into support steel pipes, and the hydraulic cylinders (6) are connected with a hydraulic system. When great deformation happens under the pressure action of a tunnel surrounding rock at initial support of the tunnel, the support system can be quickly arranged to quickly and effectively provide a stable system supporting force and prevent collapse and support deformation from intruding into the tunnel limit to cause rework; and when the tunnel is normally tunneled and dug below the step, the system is arranged to prevent overlarge deformation, ensure the safety of tunnelconstruction and save the engineering cost.

The invention discloses an ecological restoration method for a coal mine waste rock mountain. The method comprises the following steps of (1) reducing the slope surface of the waste rock mountain, reducing the slope to 20-30 degrees, stabilizing the slope surface, and setting a drainage system; 2) laying loess on the surface of the spontaneous combustion waste rock mountain, and compacting to isolate an air approach, so that the internal air of pontaneous combustion waste rocks is exhausted and extinguished; (3) conducting seed-spraying on the coal mine waste rock mountain slope by using a loam-like substrate spraying method, specifically, laying a metal mesh on the surface of the compacted loess, and fixing with a bolt, spraying on the subsoil of the loam-like substrate, and spraying on the surface of the loam-like substrate; (4) conducting curing management of the slope, covering a non-woven fabric, reinforcing, watering, fertilizing, conducting pest control, replanting and conducting post-monitoring. The ecological restoration method for the coal mine waste rock mountain adopts loess cover, isolates air to prevent the spontaneous combustion of the waste rocks, and adopts a loam-like soil spraying technology to conduct plant seeding to achieve ecological restoration.

The invention relates to a dynamic reclamation method for an open pit mine stope. According to the technical scheme, the dynamic reclamation method for the open pit mine stope comprises the following steps: after mining of a first step and a second step is finished, sequentially carrying out reclamation on the slope surface (1) of the first step and a lower flat plate (2) of the first step, and carrying out mining stripping propulsion on a lower flat plate (6) of a third step; after mining of the third step is finished, sequentially carrying out reclamation on the slope surface (3) of the second step and a lower flat plate (4) of the second step, and carrying out mining stripping propulsion on a lower flat plate (7) of a fourth step; repeating the process until mining stripping carried out on the last step is finished, sequentially carrying out reclamation on the slope surface of the next-to-last step and a lower flat plate of the next-to-last step, and then carrying out reclamation on the last step. During reclamation, a spray-seeding green technology is adopted, spray-seeding is carried out on the slope surface of a to-be-reclaimed step and the lower flat plate of the to-be-reclaimed step sequentially by adopting spray-seeding equipment (5) on the lower flat plate of the next to-be-reclaimed step, and a non-woven fabric or a straw malt is used for covering after spray-seeding is finished. The dynamic reclamation method for the open pit mine stope has the advantages of high reclamation efficiency, good reclamation effect, short mine ecological environment restoring period and synchronization of reclamation and mining.

The invention discloses a construction method of a large-scale arch bridge foundation on the water-permeable geology. The construction method of the large-scale arch bridge foundation on the water-permeable geology is characterized by comprising the following steps of conducting island and cofferdam construction, constructing a shortcut, constructing reinforced concrete secant piles, conducting high-pressure grouting waterproof curtain construction and foundation pit inner basement grouting construction at the same time, constructing a jet grouting pile waterproof curtain, constructing a top beam and a first inner support beam, conducting excavation to the elevation of a second inner support beam, constructing a waist rail and the second inner support beam, conducting excavation to the elevation of a third inner support beam and constructing a third-layer inner support beam, conducting excavation to the designed basement, constructing an arch support foundation and detaching inner support layer by layer and backfilling the foundation pit. According to the construction method, the construction progress is rapid, the construction quality is stable, the waterproof curtain outside thepit enables the outer side of the foundation pit to form an annular closed seepage-proof structure layer; and meanwhile, the high-pressure jet grouting piles on the top enable the soil layer outside support piles to be hardened, the soil layer outside the foundation pit is further strengthened, and the situation that the cofferdam landslides and collapses due to flood scouring is effectively prevented. In addition, a special-shaped steel reinforcement cage saves concrete materials.

The invention discloses a prevention and treatment method of water scour hazards of a binding site of a mine solid waste yard and a mountain area. An intercepting ditch (2) is built in the binding site of the mountain area and the solid waste yard (6) and the intercepting ditch (2) is built from the topmost step to the bottommost step of the solid waste yard (6) according to the terrain condition; step drainage ditches (1) are built in each step; the step drainage ditches (1) are communicated with the intercepting ditch (2); sumps (4) are built at the bottommost corners of two ends of the binding site of the mountain area and the solid waste yard (6); the sumps (4) are communicated with a drainage tunnel (3); and a longitudinal bottom of the intercepting ditch (2) is in a step shape. The intercepting ditch (2) is built to communicate with every step drainage ditch (1) to form a multi-stage small area drainage system, so that drainage is drained to the sumps (4) to be guided away from a solid waste accumulation area through the drainage tunnel (3). The prevention and treatment method of the water scour hazards of the binding site of the mine solid waste yard and the mountain area has the advantages of being capable of effectively preventing the binding site of the mountain area and the solid waste yard from water scour, reducing water loss and soil erosion, protecting the environment and preventing landslides and debris flow hazards.

The invention relates to the field of constructional cementing materials, particularly to low-cost heat-resistant magnesium cement and a method for preparing a building block. The magnesium cement ischaracterized by comprising the following raw materials by weight: 55-65 parts of light-calcined magnesia powder, 25-35 parts of silica fume, 10-20 parts of magnesium sulfate heptahydrate, 0.1-1 partof fine dolomite powder, 0.1-1 part of a modifier, 0.1-1 part of a water repellent agent, 0.1-1 part of heat-resistant fibers, and 0.1-1 part of an early strength agent, wherein the light calcined magnesia powder is formed by calcining low-grade magnesite at 700-900 DEG C. Compared with the prior art, the beneficial effects of the invention are as follows: the magnesium cement has the advantages of light weight, high strength, no moisture absorption or efflorescence, small corrosion to reinforcing steel bars and the like; the raw material light calcined magnesia powder is prepared through calcining of considerable waste low-grade magnesite which is piled up storage; and since low-grade ore with low price and various industrial wastes are used, the cost of the raw materials of the magnesiumcement is much lower than the cost of regular commercially-available raw materials, the wastes are utilized, and the comprehensive utilization of waste resources is realized.

The invention relates to a construction method of a tree aggregate. In the construction method, various aggregation methods are singly or comprehensively used, an assistant technique is matched, a new artificial tree group can be constructed, and construction is carried out according to designed drawing to realize industrial production. The constructed tree aggregate can be more stably and perfectly aggregated. Compared with the tree single bodies, the tree aggregate has the aggregation effect, and new shape, functional and characteristics. By using the technique, live great trees and shaped nursery stock can be quickly produced in garden, horticulture and agriculture industries, so as to build a three-dimensional cultivation new model, in addition, a cultivation mode for preventing and controlling landslide and mudflow is built, a new sandstorm-resistant cultivation mode is built, a tree special (such as bark, latex, rosin, rhus lacquer, timber, fruit and the like) product duplication yield-increasing mode is built, and a whole-plant, low-carbon and energy-consumption-balanced human dwelling mode is built.

The invention discloses a method for embankment by blasting and silt squeezing on a complex soft foundation, which is characterized by: taking advantage of the characteristics of ocean tide rising and falling, using the depth of covering water instead of a resistance line in blasting, applying most energy onto the top face of the complex soft foundation, squeezing down the complex soft foundation, adopting the combined action of blasting at a dyke head or on two sides of a dyke and other various blasting modes at the same time, continuously squeezing down jackstones by using the gravity of the jackstone dyke body under the action of explosion shock to remove the silt soft foundation under the jackstones, allowing the stone layer of the dyke body to fall onto bottom to form a sea dyke cross-section meeting design requirements, allowing two sides of the dyke body to fall onto the ground completely with certain ground width, and ensuring the stability of the dyke body; and avoiding landslip frequently occurring in on-site backfill and direct random sea dyke fill, as well as increasing embankment construction speed, reducing cost by 50 to 90 percent and achieving considerable economic benefits compared with a processing method which is to first excavate soft foundation and then fill back.

The invention relates to a deep sludge continuous fishpond pipe laying construction method. The method comprises the following steps that construction preparation, measuring unreeling, pipe ditch digging, prefabrication platform construction, pipe transmitting ditch digging and rolling wheel support mounting are carried out, three steel pipes are prefabricated into one section then six steel pipes are connected into one after the assay is approved, a blind plate, a water inlet valve and an exhaust valve are welded to a water entry end, three excavators carry out hoisting at the same time, a first section prefabricated steel pipe is hoisted on a rolling wheel support, then the excavators move forwards simultaneously until the front portion of the pipe enters water and is floated, a second section prefabricated pipe is welded to the tail portion of the first prefabricated pipe, the three excavators return to the initial positions and hoist the second prefabricated pipe to push the second prefabricated pipe again and so repeatedly, two side pulling ropes at the front-most end of a pipe are pulled to enable the pipe to turn naturally by means of own elasticity, a blind plate, a water inlet valve and an exhaust valve are welded to the tail end of a last section pipe, water injection and pipe sinking are carried out after pipe ditches are checked and cleaned again, and then pressing pieces are backfilled. The deep sludge continuous fishpond pipe laying construction method is low in cost, short in time for construction and high in quality.

The invention provides a supporting method for construction of a high-ground-stress weak broken surrounding rock large-section tunnel intersection. According to the supporting method, through pilot tunnel construction, surrounding rock deformation energy is effectively released, and surrounding rock deformation is controlled advantageously; constant-resistance large-deformation anchor cables can achieve constant-resistance sliding under the action of high pretightening force, the deformation energy of surrounding rock is evenly released, and the structural stability of a supporting body is effectively protected; an active supporting mode is adopted, reverse constraining force can be applied to the surrounding rock in time, the bidirectional stress state of the excavated surrounding rock isrestored to the three-direction stress state, the broken surrounding rock can be improved into a combined arch with the uniform bearing force through the constant-resistance large-deformation anchorcables, the friction force between the surrounding rock is increased through the high pretightening force of the constant-resistance large-deformation anchor cables, and the anti-shearing capacity ofa bearing arch is improved; and the surrounding rock can be suspended on a deep stable rock stratum through the suspension theory, the reinforced combined arch is formed through joint supporting of the long anchor cables and the short anchor cables, and large deformation of the soft rock surrounding rock is resisted jointly.

The invention relates to a reinforced slope retaining wall height determination method and a reinforced slope retaining wall. The method comprises the steps of building a mathematic model of a reinforced slope, and generating a plurality of soil layer parameter samples; calculating safety coefficients of the plurality of soil layer parameter samples to obtain a plurality of unstable samples of which the safety coefficients are less than 1; determining the stable states of the unstable samples under different set retaining wall heights to obtain the number of the unstable samples with unstablefailure under different set retaining wall heights so as to obtain the relationship between the set retaining wall heights and the failure probability of the slope; and determining the retaining wallheight value required by construction according to the obtained relationship between the set retaining wall height and the failure probability. By adopting the method, the failure probability of the slope can be effectively reduced.

The invention discloses a support method used in passing a water guide fracture structure in mine exploration, belonging to an underground mining method. The support method comprises the following steps: a working roadway is tunneled along a vertical fault direction, temporary support is carried out once when tunneling forwards for 1-2 m, when the working roadway is dug to be at a distance of 5-10 m from the fault, tunneling is stopped, the working roadway is expanded and brushed, a grouting device roadway with the length of 3 m is expanded and brushed, a grouting device is provided, multiple pipe shed holes are formed from the tail end of the grouting device roadway to the fault, the pipe shed holes are located above the top wall of the working roadway, a pipe shed support is arranged in each pipe shed hole, and a grouting pipe is connected with each pipe shed hole, so that cement mortar flows into underground water of a fracture zone; the working roadway is tunneled, when the working roadway is tunneled to be at a distance of 2 m from the fault surface, tunneling is stopped, and multiple anchor rows are driven to a direction of the water guide fracture structure from a place at a distance of 2 m from the fault surface; at last, multiple drainage holes are formed from the tail end face of the working roadway to the fault direction. According to the invention, when the roadway is dug to pass the fracture structure, collapse cannot happen, a digging process is safe, and larger economic benefit can be obtained.

The invention provides an application method of composite sodium-based bentonite on construction of an underground continuous wall, which takes the composite sodium-based bentonite as a material for preparing a wall-protection slurry and comprises the following process steps of: (1) preparing the wall-protection slurry by using the composite sodium-based bentonite, calcined soda and water and sufficiently mixing and storing the wall-protection slurry for standby; (2) during the trough-forming process of the underground continuous wall, filling the wall-protection slurry to be used into the trough section so as to carry out wall protection by slurry; (3) cleaning the hole after forming the trough; (4) repeatedly separating, purifying and detecting the slurry pumped out of the trough bottom during the cleaning-hole process; and (5) adjusting the qualified sands after separating the sand; subsequently repeatedly using the slurry; and abandoning the recycled slurry exceeding the index range. The wall-protection slurry prepared by the method has excellent wall-protection performance, slag-carrying capability and anti-pollution capability, can overcome the quality problems of the underground continuous wall such as collapse, settlement, exposed reinforcement, water leakage, and the like, thereby being suitable for all enclosure structures of the underground continuous walls, particularly the ultra-deep underground wall engineering with thicker sandy silts.

The invention discloses a novel guniting material for inhibiting spontaneous combustion of a gangue dump and an application method thereof, and belongs to the field of spontaneous combustion extinguishment of the gangue dump. The raw material of the guniting material is mainly coal-based solid waste, which comprises power plant by-product fly ash and desulfurized gypsum taking coal as fuel; the guniting material further includes by-product calcium carbide slurry of a PVC plant, by-product silica fume powder of a silicon iron smelting plant and a composite additive. The guniting material is sprayed on the surface of a gangue dump by using a guniting machine to form a solidified layer, so that the effects of preventing wind, stopping leakage and isolating air are achieved, air is prevented from entering a fire source in the gangue dump, and spontaneous combustion of the gangue dump is inhibited.