1269 results about "Cement slurry" patented technology

The invention belongs to the technical field of oil field well cementation cement paste, and particularly relates to thixotropic cement paste and a preparation method thereof. The thixotropic cement paste provided by the invention comprises water, a dry powder material, modified silica sol, a polymer fluid loss agent and other additives. The cement paste disclosed by the invention has the characteristics of viscoelasticity, no dispersion under water, thixotropy and leaking stoppage.

The invention provides high-toughness micro-expansive cement paste suitable for high-temperature well cementation. The cement paste comprises the following raw materials in parts by weight: 60-90 parts of G-grade oil well cement, 20-40 parts of an active material, 3-12 parts of a high-performance toughening agent, 3-10 parts of nano oxide, 0.5-5 parts of an expanding agent, 3-5 parts of a chemical exciting agent, 1-3 parts of a high-temperature fluid loss agent, 0.5-3 parts of a high-temperature retarder and 0.1-1 part of a dispersing agent, and 0.2-1 part by weight of a defoaming agent. By adding the active material, the high-performance toughening agent, the nano oxide and the expanding agent, the high-temperature resistance and toughness of the cement paste, the cementation quality of a cement sheath and the like are improved; through the combined action of the four components, the high-temperature resistance, toughness and surrounding rock interface cementation performance of the cement are comprehensively improved; and the cement paste is matched with other components for use, so that the cement paste has the advantages of good stability, low water loss, good rheological property and the like, is suitable for underground gas storage well cementation, can improve the well cementation quality of a stratum sealing section, and ensures the sealing integrity of a cement sheath under frequent injection and production.

The present invention relates to a sealing method for high-flow water inrush at a side wall of a foundation pit, the method comprising: calculating the minimum radius of a counter-pressure soil berm on the basis of the flow time of a liquid slurry in the counter-pressure soil berm being not less than the chemical setting time of the liquid slurry; piling up filtering sand bags on a foundation pit excavation face at a water inrush point, and constructing the counter-pressure soil berm; constructing annular grouting holes at the foundation pit on the outside of support piles and a cut-off curtain; according to the planar arrangement of the annular grouting holes, successively injecting a double-liquid slurry formed by mixing a cement slurry and sodium silicate into the annular grouting holes; inspecting the water seepage condition on the periphery of the counter-pressure soil berm until no water seepage occurs on the periphery of the counter-pressure soil berm; and excavating the counter-pressure soil berm layer by layer until the excavation reaches the pit bottom without water seepage observed at a side wall of the foundation pit. The present invention has the beneficial effects that: the size of the counter-pressure soil berm is optimally designed on the basis of the condition that the flow time of the double-liquid slurry in the soil berm is longer than the setting time, so as to solve the problems of slurry setting failure and poor grouting and sealing effects, thus saving a large amount of grouting materials, and reducing economic loss caused by secondary sealing.

The invention relates to the technical field of well cementation materials and provides well cementation cement stone based on water-based benzoxazine resin as well as a preparation method and application of the well cementation cement stone. The well cementation cement stone is prepared from the following components in parts by mass: 400-600 parts of quartz sand, 4-6 parts of a retarder, 4-6 parts of a fluid loss agent, 1-2 parts of a suspension stabilizer, 1-2 parts of a dispersant, 4-6 parts of a high-temperature-resistant water-based benzoxazine monomer and 40-50 parts of water, and the high-temperature-resistant water-based benzoxazine monomer is prepared from a phenolic compound, primary amine and formaldehyde through Mannich reaction. Resin formed by the prepared benzoxazine monomer has improved mechanical properties at a high temperature of 150-200 DEG C, the mechanical properties and high temperature resistance of well cementation cement at a high temperature are significantly improved by filling pores of set cement and optimizing cement components, the benzoxazine monomer in a cement slurry system does not affect the fluidity of cement slurry, and the well cementation cement has a good application prospect. Meanwhile, the high-temperature strength of set cement can be remarkably enhanced, and the cement is suitable for well cementation of high-temperature deep wells.

The invention discloses a building cement floor construction leveling device, and relates to the technical field of cement floor construction, the building cement floor construction leveling device comprises a scraping plate, a vibration support is installed in the middle of the scraping plate, a vibration motor is installed on the vibration support, and an operation frame used for moving the leveling device is further installed on the vibration support; the lifting mechanism is installed on the rear side of the scraping plate, the lifting mechanism comprises a fixed plate and a lifting plate, and the lifting plate can do lifting motion relative to the fixed plate; the plurality of movable mounting mechanisms are mounted on the lifting plate and are used for movably mounting the vertical vibration mechanism; through cooperative arrangement of the lifting mechanism, the movable mounting mechanism and the vertical vibration mechanism, internal vibration treatment of thick cement pavement slurry can be achieved, exhaust of gas in the cement slurry is promoted, and the construction quality of leveling of the thick cement pavement can be improved in combination with scraper vibration leveling.

The invention discloses polymer graft modified graphene oxide as well as a preparation method and application thereof, and belongs to the field of building materials. The polymer grafted modified graphene oxide comprises graphene oxide and a polymer grafted on the surface of the graphene oxide through an ester bond, and the grafting mass ratio of the graphene oxide to the polymer is 1: (0.15-0.75). The preparation method of the polymer grafted modified graphene oxide comprises the following steps: firstly, carrying out esterification reaction on hydroxyl on the surface of graphene oxide and a reversible addition-fragmentation chain transfer polymerization (RAFT) chain transfer agent to generate GO of which the surface is grafted with the RAFT chain transfer agent; and adding a methacrylic acid monomer and an initiator, and carrying out RAFT polymerization on the surface of the GO to obtain a target product. The polymer grafting modified graphene oxide provided by the invention can achieve the effects of high polymer grafting ratio and capability of improving the fluidity of cement paste.

The present disclosure relates to the technical field of petroleum extraction, and disclosed are a forward and reverse circulation combined cementing tool and method, aiming to solve the problem of poor adaptability when using forward or reverse circulation cementing alone. The forward and reverse circulation combined cementing tool comprises a cross-circulation sub (2) and a reverse circulation cementing choke float shoe (3) which are arranged from top to bottom; the reverse circulation cementing choke float shoe (3) comprises a choke assembly (33) and a one-way valve (32), and the choke assembly (33) comprises a control module (332) and a choke module (333). The forward and reverse circulation combined cementing tool and method make full use of the advantages of forward and reverse circulation cementing processes, achieving pressure balance and cement slurry delivery, solving the problems of ultra-long cementing sections and complex formation cementing, greatly improving cementing quality and construction efficiency, and the cementing tool and method are suitable for cementing operations in oil and gas wells under complex geological conditions.

The invention discloses a thick soft soil foundation bridge bored pile construction method which comprises the following steps: firstly, vibrating and driving an outer pile casing to a stable depth, nesting an inner pile casing in the outer pile casing, then performing rotary excavating and drilling to reach 1m of the bottom of a pile, injecting high-pressure rotary spraying cement slurry into the bottom of the pile and synchronously starting vacuum suction, and then injecting compensation slurry at a reducing position through ultrasonic scanning, a reinforcement cage is installed, and finally control concrete is symmetrically poured through double guide pipes; through the synergistic effect of high-pressure cutting and vacuum negative-pressure suction, high-pressure cement paste can fully smash muddy sediment blocks at the bottom of a pile, and the vacuum suction device synchronously sucks suspended fine particles, so that the sediment removal rate is greatly increased, and the cleaning bottleneck of fine-particle sediments in a traditional process is broken through.

The invention discloses an intelligent regulation and control method and system for tunnel concrete spraying. The method comprises the steps that key influence factors of the adhesion and solidification process of concrete are determined; according to the determined adhesion and solidification process influence factors, material proportioning parameters are optimized in combination with cement grout fluidity and additive effect change characteristics, and based on an optimized proportioning scheme, the requirements of construction area differences for injection parameter adjustment are analyzed, and pressure and flow set values of injection equipment are determined; according to the determined pressure and flow set values, injection parameter adjusting instructions for different areas are generated, equipment operation configuration suitable for current temperature distribution is obtained, and a corrected operation instruction is generated; and the corrected operation instruction is transmitted to a spraying equipment control system, the equipment operation state is adjusted in real time, meanwhile, adjusted concrete solidification process control data are collected, and whether the final performance parameters meet the construction requirements or not is determined. The construction quality and efficiency are improved.

Pumpable slurry compositions including at least one aluminosilicate additive and optional pozzolanic cement additives and methods including the pumpable slurry compositions improve development of compressive strengths in the pumpable cement slurry compositions. The methods utilize one or more pumpable cement slurry compositions including at least one cement component, water, at least one first aluminosilicate additive, at least one optional second aluminosilicate additive, and one or more optional pozzolanic additives, where the at least one first aluminosilicate additive has an amorphous phase of greater than about 50% and a weight ratio of silica oxide to aluminum oxide of about 1.0 to about 2.5, and the at least one optional second aluminosilicate additive has a weight ratio of silica oxide to aluminum oxide of about 1.7 to about 3.3.

The invention relates to the field of salt mine drilling well plugging, in particular to a bag type drilling well leakage plugging device capable of being used in a combined mode and a using method thereof.The bag type drilling well leakage plugging device comprises a drilling well and a drilling rod installed in the drilling well and further comprises a connecting sleeve composed of two plate bodies, and the connecting sleeve is connected with the surface of the drilling rod in an attached mode; a first bag body is arranged on the outer side of the surface of each connecting sleeve, grouting bases are arranged on the surfaces of the connecting sleeves, a second bag body is arranged between the two grouting bases, a liquid filling channel and a grouting channel are formed in the top of the surface of each connecting sleeve, and a filling connecting piece is arranged between the two grouting bases. A grouting opening is formed in the surface of the grouting seat; the bag structure is adopted, combined use is formed, the two sides of a leakage point are plugged through the first bag body, the closed area is formed, cement grout is injected into the closed area, the leakage point is plugged, meanwhile, the second bag body isolates the cement grout from the drill rod, drill jamming is prevented, and practicability is improved.

A method of cementing a geothermal wellbore includes pumping a first volume of cement slurry down a wellbore. The first volume of cement slurry has a first water to cement ratio. A second volume of cement slurry is pumped down the wellbore. The second volume of cement slurry has a second water to cement ratio that is less than the first water to cement ratio. The first volume of cement slurry hardens at a vertical portion of the wellbore, and the second volume of cement slurry hardens at a horizontal portion of the wellbore.

The invention discloses deep coal bed gas well cementation cement paste and a preparation method thereof, and the deep coal bed gas well cementation cement paste is prepared from the following raw materials in parts by weight: 100 parts of G-grade oil well cement, 5-15 parts of water-borne epoxy resin, 1.5-3 parts of a nano silicon dioxide solution, 0.5-1.8 parts of calcium sulfate whiskers, 0.2-0.6 part of composite coating fibers, 1.2-1.8 parts of a fluid loss agent and 0.5-1.8 parts of a retarder. 0.3 to 0.5 part of a drag reducer, 0.2 to 0.5 part of a defoaming agent and 38 to 42 parts of water; wherein the composite coating fiber is hydrophilic epoxy resin modified polyethylene fiber. The cement paste can improve the well cementation cementing packing quality of a coal seam, and has good filtration property.

The present invention discloses a method for preparing a high-ionic conductivity cement-based structured electrolyte and the electrolyte, comprising: mixing a polymer solution, cement, and fine sand to obtain a polymer-cement slurry; subjecting the polymer-cement slurry to low-temperature, sealed curing, and then allowing it to stand at room temperature to obtain a cement-based structured electrolyte. The present invention utilizes a controlled phase separation technique to enable elastic phase separation of the polymer network prior to cement hydration. During the hydration process, the cement adaptively forms the backbone of the polymer network, resulting in a good interface between the two, capable of forming continuous, high-conductivity ion channels. The preparation process is simple to operate and highly reproducible.

The invention provides a foundation pit water gushing iron ore grading thixotropic blockage reduction method which comprises the steps that iron ore tailings are crushed and screened into multi-stage particle size particles, and a customized mold is subjected to 3D printing based on foundation pit scanning data; paving particles in a mold layer by layer, doping iron powder, and cementing and curing cement paste to form a prefabricated body; the prefabricated body is installed to a water gushing area, the slurry viscosity is increased through a grading contact network, a weak gravitational flow state is triggered to be transiently changed to an anti-scouring state, and water flow speed reduction is achieved; alternating field induction micro-vibration is synchronously started during lateral grouting, and grout permeation and bubble discharge are driven; after solidification, the guide core body is pulled away, and remaining pore channels are self-compacted by a grading system to form an anti-seepage structure. The method has the advantages that the anti-scouring performance is enhanced; particle-slurry-foundation pit curved surface triple self-adaptive combination is carried out; the engineering cost is reduced.

The utility model relates to the technical field of float collars and float shoes, and discloses a float collar and float shoe for well cementation of a deep well, which comprises a pipe body, G-grade cement is fixedly connected in the pipe body, a valve body is fixedly connected at the bottom of the G-grade cement, a spring is arranged in the valve body, a ball seat is slidably connected in the valve body, a ball body is fixedly connected at the top of the ball seat, and the top of the ball seat is fixedly connected with the spring. A twisted rod is fixedly connected to the bottom of the ball seat, a cross seat is rotatably connected to the periphery of the twisted rod, and a plurality of brushes are fixedly connected to the top of the cross seat. By arranging the pipe body, the G-grade cement, the valve body, the spring, the ball seat, the ball body, the twisted rod, the cross seat, the brush and the like, silt attached to the periphery of the spring can be cleaned, and the situation that due to the fact that too much silt is deposited in cement paste in the valve body, the too much silt attached to the periphery of the spring hinders stretching and retracting of the spring is prevented; the using effect of the valve body becomes poor, and the cement paste conveying efficiency is reduced.

The invention discloses a coral reef geological cast-in-situ bored pile side friction calculation method which comprises the following steps: S1, carrying out on-site pouring construction, collecting a slurry-containing rock core sample, and determining an effective radius; s2, determining the interface friction angle of concrete-coral reef rock of each level of stratum and the cementation shear strength of a slurry-containing rock core; s3, solving a slurry occlusion area coefficient according to the effective radius, integrating the interface friction force and the cementation additional frictional resistance, and establishing a side frictional resistance calculation formula; according to the method, in combination with an on-site pouring test, the infiltration-cementation occlusion effect of cement paste in coral reef rock is quantified, additional friction caused by the cementation effect is synthesized, a side friction calculation formula of a traditional pouring pile is corrected, and the problem that in traditional design calculation, the coral reef stratum bearing capacity is remarkably underestimated is solved; the construction design of the cast-in-place pile is reliably and accurately guided; all tests can be completed within 48 hours on site, and the offshore exploration cost can be remarkably reduced.

A wellbore staged operation method includes running, after a first well drifting operation is performed on a wellbore, a pipe string (100) in the wellbore, wherein the pipe string (100) includes, along a direction from bottom to top, a floating hoop (2), a plug seat (7), a toe-end sliding sleeve (3), and a fracturing sliding sleeve (4); performing a cementing operation, wherein cement slurry pumped into an inner chamber of the pipe string (100) enters an annulus between the pipe string and the wellbore through the plug seat (7) and the floating hoop (2) to form a cement sheath, the cement sheath isolating the toe-end sliding sleeve (3) from the fracturing sliding sleeve (4); performing a second drifting operation to ensure the toe-end sliding sleeve (3) of the pipe string (100) exposed; performing a pressure test for the pipe string; and performing staged fracturing constructions.

The invention relates to belite sulphoaluminate cement, the mass ratio of belite sulphoaluminate cement clinker to gypsum in the cement is (93-100): (0.5-7), the doping amount of gypsum is small, calcium sulphoaluminate can be promoted to be hydrated to generate more alumina gel, the alumina gel and dicalcium silicate generate hydrated calcium aluminosilicate, and the calcium aluminosilicate and dicalcium silicate are mixed to generate calcium aluminosilicate. Meanwhile, calcium sulphoaluminate is promoted to be hydrated to generate less ettringite and part of monosulfur hydrated calcium sulphoaluminate, and the early strength and the later strength of the cement are remarkably improved; the invention further relates to a low-temperature preparation method of the belite sulphoaluminate cement, the calcination temperature of the raw material is 1120-1200 DEG C and is lower than the calcination temperature in the prior art, and the preparation energy consumption of the cement clinker is reduced; according to the present invention, the early strength of the cement prepared through the calcination at the temperature of the present invention develops rapidly, the later strength of the cement slurry does not shrink with the increase of the hydration age, and the cement slurry still presents the stable increase trend, and the calcination temperature can increase the crystal defect of the calcium sulphoaluminate so as to easily provide the hydration activity of the calcium sulphoaluminate.

A numerical simulation method for the integrity of cement sheath systems in oil and gas wells under alternating temperature and pressure is characterized by the use of extended finite element method (XFEM), concrete damage plasticity model theory, Cohesive element method, and bilinear traction separation criterion, based on elastoplastic theory and plastic damage theory. This method can simulate not only the failure process of the cement sheath-casing interface under alternating temperature and pressure and characterize the mechanical behavior of interface failure, but also the failure process of the cement sheath itself and characterize its mechanical behavior. By comprehensively analyzing the failure behavior of the cement sheath system integrity in oil and gas wells, this method enables a realistic evaluation, prediction, and diagnosis of the integrity of the casing-cement sheath-casing assembly system under alternating temperature and pressure, which helps optimize cement slurry systems, improve cementing quality, and prevent cement sheath integrity failure. This invention is applicable to the field of oil and gas drilling and production engineering technology.

A well-cementing cement stone reinforcing material and the use thereof. The well-cementing cement stone reinforcing material comprises, according to a mass ratio: 30-50 parts of an active spherical α-Al2O3 micropowder, 30-50 parts of spherical fly ash, 5-20 parts of nano metakaolin, 5-10 parts of a hydrophilic rubber powder, and 5-10 parts of hydrophilic carbon fibers. Adding the well-cementing cement stone reinforcing material to a cement slurry of an oil-gas well can promote the generation of a crystal phase having stable high-temperature strength during the hydration process of the cement slurry, thereby improving the high-temperature strength of cement stone; and can solve the problems of a decline in strength and an increase in permeability of the well-cementing cement stone in an ultra-high temperature environment, thereby effectively ensuring the long-term sealing integrity of a wellbore in an ultra-high temperature environment and preventing the annular pressure of an oil-gas well caused by cement ring damage.

The invention relates to the technical field of fluid-state solidified soil, and particularly discloses high-fluid-state solidified soil and a preparation method thereof. The high-flow-state solidified soil is prepared from the following raw materials in parts by weight: 1100 to 1200 parts of recycled aggregate, 700 to 800 parts of river sand, 100 to 130 parts of a curing agent, 18 to 22 parts of a polycarboxylic acid water reducing agent, 75 to 85 parts of solidified soil repairing microcapsules and 55 to 95 parts of water, the solidified soil repairing microcapsule is prepared by taking polylactic acid and nano calcium carbonate grafted polyethylene glycol as composite membrane materials, and wrapping and forming sulphoaluminate cement paste through an emulsification-solidification method. The solidified soil repairing microcapsules are introduced into the solidified soil, pores in an interface transition area can be filled, micro cracks can be repaired, and the durability of the solidified soil is improved.

A method may include: introducing a resin modified cement slurry into a wellbore penetrating a subterranean formation, the subterranean formation comprising a caprock and a carbon dioxide injection zone, the resin modified cement slurry comprising: a resin; a hardener, a hydraulic cement; and water; and setting the resin modified cement slurry to form a set cement wherein the set cement forms a carbonation-resistant barrier in the carbon dioxide injection zone in the subterranean formation.

The invention discloses a protection device for treating a rock slope through cuttage planting, the slope comprises a slope body, a plurality of planting holes formed in the slope body and slurry sprayed and covered on the surface of the slope body and in the planting holes, a pluggable planting rod is arranged in each planting hole, each planting rod is formed by splicing two plate bodies, and the plate bodies are arranged in the planting holes. At least part of the planting rod is tightly attached to the planting hole, and the outer surface of the attached part of the planting rod is coated with a soluble connecting layer; a hidden flow channel is arranged at the end of the planting rod and used for conveying cement grout, and a plurality of through holes communicated with the hidden flow channel are formed in the outer surface of the planting rod within the range of the dissolvable connecting layer. Cement grout is poured into the rock mass through the hidden flow channel and the through hole, a miniature root pile with the planting hole as the core is formed, the integrity and stability of a slope shallow layer are remarkably enhanced, and structural support is provided.

The invention discloses a ground directional drilling goaf passing leaking stoppage method which comprises the steps that hole data of a goaf are obtained, and the hole data comprise the hole depth and the crack width; when the width of the crack is larger than 5 mm, a foundation plugging material is adopted for conducting foundation plugging on the hole of the goaf, and the foundation plugging material is an inert material and cement paste; judging whether basic plugging fails or not to obtain a first judgment result; if the first judgment result shows that the basic plugging fails, a flexible plugging material is adopted for conducting medium-term plugging on the holes in the goaf, and the flexible plugging material is a material formed by mixing hemp fiber, sawdust, soybeans and water. According to foundation plugging, a large channel is filled through particle bridging, a primary plugging layer is formed after cement paste is solidified, the flexible material can adapt to trace deformation of surrounding rock through deformation filling, and micro cracks of a foundation layer are plugged. Through graded gradient filling, the leaking stoppage effect can be greatly improved.

The invention discloses an anchoring method for side slope reinforcement, which comprises the following steps: step 1, determining a to-be-anchored site of a side slope according to construction requirements, assembling an anchor rod, a rotating shaft and a reinforcing mechanism to form an anchoring device, and placing a plurality of anchoring devices at the to-be-anchored site; secondly, the anchor rod is inserted into a slope soil body, and a reinforcing rod is inserted into the soil body by rotating a rotating shaft; thirdly, cement paste is injected into the anchor rod through the filling port, the cement paste overflows towards the anchor rod through the grouting port, and therefore the gap between the anchor rod and the slope soil body can be filled; fourthly, a chain sequentially penetrates into the multiple chain penetrating holes, the multiple rotating shafts are connected through the chain, then connection of the multiple anchoring devices is achieved, and reinforcement of the slope is completed; according to the anchoring method for slope reinforcement, the slope reinforcement effect can be improved, and the anchoring device can be prevented from being separated from the slope.

The invention discloses a cement-enhanced super-hydrophobic self-adaptive temperature control coating which comprises a thermochromic bottom layer and a radiation refrigeration surface layer, a primer adopted by the thermochromic coating is prepared from the following components in parts by weight: 3 to 6.6 parts of composite resin matrix, 0.4 to 1.2 parts of filler, 11 to 15 parts of thermochromic powder and 10 to 15 parts of organic solvent; and finish paint adopted by the thermochromic coating is prepared from the following components in parts by weight: 50 to 55 parts of SiO2 dispersion liquid, 2 to 9 parts of white cement slurry, 5 to 8 parts of hydrophobic modifier, 6 to 10 parts of low-surface-energy substance and 7 to 11 parts of migration-anchoring dual-function additive. The coating system disclosed by the invention can realize efficient cooling in a high-temperature environment, can keep thermal insulation performance in a low-temperature environment, has mechanical stability and self-cleaning performance required by long-term outdoor application, and is wide in applicability.

The invention relates to the technical field of open-type TBM (Tunnel Boring Machine) detrapping, and provides a detrapping method for an open-type TBM stuck in unfavorable geology, which comprises the following steps: arranging a self-propelled hollow grouting anchor rod above a TBM shield and a cutterhead, and injecting cement paste and chemical double-liquid slurry to reinforce surrounding rock to form a stable supporting body; after reinforcement is completed, top pilot tunnel manual expanding excavation is conducted, steel arch support is implemented, and meanwhile accumulated slag is removed; judging whether the TBM exits or not through a trial rotation cutter head, if not, sequentially expanding and excavating the right pilot tunnel and the left pilot tunnel, and continuously matching with supporting and slag removal until the TBM recovers tunneling; and after escape is completed, tunnel passing section surrounding rock convergence and settlement parameter monitoring is enhanced. By means of the method, the safety problem caused when workers enter the cutterhead to remove slag under the condition of poor protective measures is avoided, the operation safety is improved, meanwhile, the open TBM detrapping speed is increased, and the construction progress is prevented from being affected; in addition, used materials are universal, the construction technology is mature, and the advantages of being controllable in cost, simple in structure, high in applicability and the like are achieved.

The invention discloses a high-bearing-capacity formed spiral anchor foundation and a construction technology, and relates to the technical field of spiral anchor foundations, the high-bearing-capacity formed spiral anchor foundation comprises a hollow anchor rod, at least one spiral anchor disc and a plurality of grouting holes, the spiral anchor disc and the grouting holes are arranged on the lower section of the anchor rod, a pressing disc structure is coaxially arranged on the middle section of the anchor rod, and the diameter of the pressing disc structure is basically equal to that of the spiral anchor disc; and the pressure plate structure is used for compacting soil around the anchor rod in the process of screwing the anchor rod into the ground. In the process that the middle section of the anchor rod is screwed into the ground, the pressing disc structure compacts soil around the anchor rod disturbed by the spiral anchor disc, the uplift bearing capacity is improved, in the later stage, through the high-pressure grouting stage of the anchor rod, cement paste cannot uprush from the high-compactness soil in the spiral anchor disc and around the anchor rod, and the uplift bearing capacity is improved. The high-bearing forming spiral anchor foundation can only uprush to the ground from soil which is far away from the anchor rod and is relatively low in compactness, so that the cement paste is fully injected into the underground soil, the paste wrapping range is wide, the grouting effect is good, and the bearing capacity, especially the horizontal bearing capacity, of the high-bearing forming spiral anchor foundation is remarkably improved.

The invention relates to the technical field of mining, and discloses a high and large stope barren rock and tailing cemented filling body artificial false bottom and a manufacturing method thereof. The artificial bottom comprises a framework structure, a waste rock layer and a tailing cementing material layer; wherein the skeleton structure comprises an upper-layer reinforcing mesh structure, a lower-layer anchor mesh structure and a steel fiber rope for connecting the upper layer and the lower layer; the skeleton structure is filled with the waste rock layer; gaps between the framework structure and the waste rock layer are filled with the tailing cementing material layer. According to the high and large stope barren rock and tailing cemented filling body artificial false bottom and the manufacturing method thereof, underground barren rock is used as main aggregate, the using amount of a cementing agent is greatly reduced, a reinforcing mesh-barren rock-cementing slurry composite flexible structure has extremely high mechanical performance, the maintenance period is remarkably shortened, the construction efficiency is improved, and the construction cost is reduced. And the construction cost is reduced.