CN111487163A - Novel variable-load pressurizing grouting test device for fractured coal and rock mass - Google Patents
Novel variable-load pressurizing grouting test device for fractured coal and rock mass Download PDFInfo
- Publication number
- CN111487163A CN111487163A CN202010317962.5A CN202010317962A CN111487163A CN 111487163 A CN111487163 A CN 111487163A CN 202010317962 A CN202010317962 A CN 202010317962A CN 111487163 A CN111487163 A CN 111487163A
- Authority
- CN
- China
- Prior art keywords
- steel
- detachable
- grouting
- loading
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels, explosives
- G01N33/222—Solid fuels, e.g. coal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N2013/003—Diffusion; diffusivity between liquids
Abstract
The invention provides a novel variable-load pressurized grouting test device for a crushed coal rock mass, which comprises a crushed coal rock mass loading system, a bearing sealing system and a portable single/double-liquid grouting system, wherein the crushed coal rock mass loading system comprises a sequentially-connected manual hydraulic pump, a high-pressure oil pipe, a hydraulic jack and a detachable loading steel column, the bearing sealing system comprises a sequentially-connected pressurized bearing steel frame group, a detachable closed sealing steel barrel and a tail bearing steel plate, the hydraulic jack is fixedly arranged on the bearing steel plate of the pressurized bearing steel frame group, the detachable loading steel column is inserted into a preset inserting hole of a steel ring buckle of the pressurizing bearing steel frame group, the portable single/double-liquid grouting system comprises a hollow grouting steel pipe, a high-pressure grouting pipe, a double-liquid mixing interface and a portable single/double-liquid grouting pump which are sequentially connected, and one end of the hollow grouting steel pipe is fixedly connected with a grouting hole of the tail pressure-bearing steel plate. The test device can reflect the diffusion range and the consolidation effect of slurry in the broken rock mass under different stress conditions.
Description
Technical Field
The invention relates to the technical field of rock mass grouting reinforcement research, in particular to a novel variable-load pressurizing grouting test device for a fractured coal rock mass.
Background
The broken rock mass is a common rock mass form in engineering, is usually formed by recompacting a plurality of small rock blocks, has poor adhesion among the rock blocks, and is easy to rebound, relax and deform once exposed or exposed. Compared with the complete and compact rock mass, the broken rock mass has the characteristics of weak bearing capacity, large porosity, strong permeability and the like, and accidents or disasters such as support body failure, surrounding rock instability, water permeability, gas outburst and the like are easily caused in the engineering, so that the reinforcement of the broken rock mass is one of the important problems which are urgently needed to be solved in various geotechnical engineering. With the development and improvement of the grouting technology, the current grouting technology is widely applied to various fields such as civil engineering, tunnels, highways, bridges, mining and the like. Particularly, the grouting technology can be adopted for filling and reinforcing the fractured rock mass so as to improve the stability and the bearing property of the fractured rock mass and reduce the internal porosity and the permeability of the fractured rock mass.
In engineering application, the physical and mechanical properties, the crushing degree, the ground stress and the like of the rock can influence grouting, so grouting design needs to be carried out according to the characteristics of the rock and the diffusion characteristic and the reinforcing effect of grout in a crushed rock body. But the diffusion of the grout in the broken rock body has complexity and concealment, and the grouting effect cannot be accurately controlled, so that the laboratory test becomes an important reference for researching the grouting problem in engineering.
The grouting test research device and method related at the present stage have certain limitations, and the aimed problems are single and can not follow up the requirements of engineering practice. For example, in chinese patent application with publication number CN107782880A, a multifunctional indoor soil grouting simulation test device and a test method thereof are disclosed, the device includes a grouting mechanism, a test chamber and a pressure control mechanism. However, through research, the inventor of the present invention finds that the test can only be used for soil body grouting, only considers the influence of a grouting method and soil body gradation, does not consider the influence of ground stress on a grouting effect, and is single in test, so that the increasingly complex engineering problem is difficult to deal with.
Therefore, how to combine the actual grouting process and technology to design a widely-applicable grouting simulation device capable of comprehensively considering the grading of different fractured rock masses and the magnitude of the ground stress to predict the grouting effect is necessary to provide reference for the research and design of the grouting process of the fractured rock masses.
Disclosure of Invention
The invention provides a novel variable-load pressurized grouting test device for a crushed coal rock mass, which aims to solve the technical problems that the existing grouting simulation test device can only be used for soil mass grouting, only the influence of a grouting method and soil mass grading is considered, the influence of ground stress on a grouting effect is not considered, and the test is single, so that the increasingly complicated engineering problem is difficult to deal with.
In order to solve the technical problems, the invention adopts the following technical scheme:
a novel variable load pressurization grouting test device for a crushed coal rock mass comprises a crushed coal rock mass loading system, a bearing sealing system and a portable single/double-liquid grouting system; wherein the content of the first and second substances,
the broken coal rock mass loading system comprises a manual hydraulic pump, a high-pressure oil pipe, a hydraulic jack and a detachable loading steel column, wherein the manual hydraulic pump is connected with the hydraulic jack through the high-pressure oil pipe, the detachable loading steel column comprises a plurality of sections of loading steel columns, two adjacent sections of loading steel columns are detachably connected, and a first section of loading steel column of the detachable loading steel column is fixedly connected with a piston rod of the hydraulic jack;
the bearing sealing system comprises a pressurizing bearing steel frame group, a detachable closed sealing steel barrel and a tail bearing steel plate, the pressurizing bearing steel frame group comprises a bearing steel plate, a steel ring buckle and a plurality of threaded steel bars, the hydraulic jack is fixedly arranged on the inner surface of the bearing steel plate, the steel ring buckle is configured relative to the bearing steel plate, the last section of loading steel column of the detachable loading steel column is inserted into a preset inserting hole in the middle of the steel ring buckle, and the plurality of threaded steel bars are fixedly inserted into a plurality of threaded steel inserting holes preset around the surfaces of the bearing steel plate and the steel ring buckle; the detachable closed type sealing steel barrel comprises a plurality of sections of detachable steel barrels which are fixedly connected, the detachable steel barrel is formed by sealing and combining two identical semicircular flange steel barrels, the barrel body of the detachable steel barrel is sleeved with a high-pressure pipe hoop which enables the two semicircular flange steel barrels to be tightly combined, a plurality of bolt holes are arranged around the front end fixed connection surface and the rear end fixed connection surface of the detachable steel drum, the front end fixed connecting surface of the first section of the detachable and closed type sealing steel barrel is tightly contacted with the outer surface of the steel ring buckle, the plurality of threaded steel bars are fixedly inserted into the plurality of bolt holes in the front end fixed connection surface, and the detachable loading steel column can penetrate through a preset insertion hole in the middle of the steel ring buckle under the action of the hydraulic jack, enter the hollow interior of the detachable closed type sealing steel barrel and move towards the bottom of the detachable closed type sealing steel barrel; the middle of the tail part pressure-bearing steel plate is provided with a grouting hole, the periphery of the surface of the tail part pressure-bearing steel plate is provided with a plurality of bolt holes, the rear end fixed connecting surface of the last section of the detachable closed type sealing steel barrel is in close contact with the surface of the tail part pressure-bearing steel plate through a gasket, and bolts penetrate through the rear end fixed connecting surface and the plurality of bolt holes of the tail part pressure-bearing steel plate and are connected and fixed through nuts;
the portable single/double-liquid grouting system comprises a hollow grouting steel pipe, a high-pressure grouting pipe, a double-liquid mixing interface and a portable single/double-liquid grouting pump, wherein one end of the hollow grouting steel pipe is fixedly connected with a grouting hole of the tail pressure-bearing steel plate, and the other end of the hollow grouting steel pipe passes through the double-liquid mixing interface and is connected with the portable single/double-liquid grouting pump through the high-pressure grouting pipe.
Compared with the prior art, when the novel variable-load pressurizing and grouting test device for the crushed coal rock mass is used, firstly, the crushed coal rock mass with the specific grain diameter combination which is sieved in advance is loaded into the detachable closed type sealing steel barrel, tamping is carried out after the loading so as to ensure that the internal pressure is uniform during pressurizing, after the loading is finished, the pressurizing bearing steel frame group is connected with the detachable closed type sealing steel barrel in a combined way, then, the pressure is pressurized to the set pressure through the manual hydraulic pump, the loading pressure can be randomly set between 0 and 30MPa according to the test requirements, the loading pressure is stable after the constant pressure is 10min, chemical grout is injected into the load-bearing crushed coal rock mass through the portable single/double-liquid grouting system after the loading pressure is stable, the grouting pressure can also be adjusted between 0 and 15MPa according to the test requirements, when the grouting pressure is stable, the pressure is not reduced or the grouting time exceeds 10min, the experiment is ended; after the experiment is finished, the diffusion rule of the chemical slurry in the crushed coal rock mass can be analyzed by splitting the steel barrel, and the consolidation condition is evaluated. In the test device, the loading steel column is driven to move towards the inside of the sealed steel barrel through the pressurization of the manual hydraulic pump, so that the specific loading stress is applied to the crushed coal rock mass in the sealed steel barrel, the influence of the ground stress on the crushed coal rock mass on the grouting effect is considered, and the grouting effect can be predicted by comprehensively considering the grading of different crushed rock masses and the magnitude of the ground stress on the increasingly complex engineering problems; simultaneously this test device has simply, easily transports, the simple operation, and the effect is showing, and extensive applicability, consolidation rock mass after the slip casting is consolidated easily processes advantages such as carrying out conventional unipolar (triaxial) experiment, can reflect the diffusion range and the consolidation effect of play thick liquid in broken rock mass under different ground stress condition, can extensively be used for the research of broken rock mass slip casting reinforcement in fields such as civil engineering, tunnel, highway, bridge, mining.
Furthermore, connecting holes are formed in two ends of each section of loading steel column, deformed steel bars for connecting two adjacent sections of loading steel columns are connected in the connecting holes in a threaded mode, and a circular groove convenient for inserting a piston rod of a hydraulic jack is formed in the front end of the first section of loading steel column of the detachable loading steel column.
Further, the detachable loading steel column comprises four sections of loading steel columns with equal lengths.
Furthermore, the inner surface of the bearing steel plate is provided with a circular clamping groove which is convenient for the hydraulic jack to be fixedly placed.
Furthermore, the joint of the two identical semicircular flange steel barrels is of a Z-shaped structure, and a sealing strip is arranged between the joints of the Z-shaped structures.
Further, but the sealed steel drum of split closed type includes two sections fixed connection's removable fraction steel drum, has placed the sealing rubber ring between the fixed connection face of rear end of first section removable fraction steel drum and the fixed connection face of front end of the removable fraction steel drum of second section to wear to establish the bolt through a plurality of bolt holes that set up around the fixed connection face of front and rear end and adopt nut fixed connection, and the length of the removable fraction steel drum of single-section equals with the length of removable fraction loading steel column.
Furthermore, two high-pressure pipe hoops are sleeved on the barrel body of each section of the detachable steel barrel at intervals.
Furthermore, six threaded steel through holes are uniformly formed in the periphery of the surfaces of the bearing steel plate and the steel ring buckle in advance, and six bolt holes corresponding to the threaded steel through holes are formed in the periphery of the front end fixed connecting surface and the rear end fixed connecting surface of the detachable steel barrel and the periphery of the surface of the tail pressure bearing steel plate.
Furthermore, a sealing ring arranged between the fixed connecting surface at the rear end of the last section of detachable steel drum and the surface of the tail pressure-bearing steel plate in a cushioning mode is located between a grouting hole and a bolt hole of the tail pressure-bearing steel plate.
Drawings
FIG. 1 is a schematic structural diagram of a novel coal and rock mass crushing variable-load pressurizing grouting test device provided by the invention.
Fig. 2 is a schematic structural view of the detachable loading steel column in fig. 1.
Fig. 3 is a schematic view of the connection structure between two adjacent loading steel columns in fig. 2.
Fig. 4 is a front view schematically illustrating the structure of the load-bearing steel plate of fig. 1.
Fig. 5 is a schematic sectional view of the load bearing steel plate of fig. 1.
Fig. 6 is a schematic middle sectional view of the detachable sealing steel drum of fig. 1.
Fig. 7 is a schematic sectional view of the detachable sealing steel drum in fig. 1.
Fig. 8 is a front view schematically showing the structure of the steel buckle of fig. 1.
Fig. 9 is a schematic sectional view of the steel buckle of fig. 1.
Fig. 10 is a front view schematically illustrating the structure of the tail pressure-bearing steel plate of fig. 1.
Fig. 11 is a side view schematically illustrating the structure of the trailing bearing steel plate of fig. 1.
In the figure, 1, a coal rock mass crushing loading system; 11. a manual hydraulic pump; 12. a high pressure oil pipe; 13. a hydraulic jack; 14. the steel column can be loaded in a detachable mode; 141. a first section of loading steel column; 142. loading a steel column at the last section; 143. connecting holes; 144. deformed steel bar; 145. a circular groove; 2. a load bearing sealing system; 21. a load bearing steel plate; 211. the deformed steel bar penetrates through the jack; 212. a circular slot; 22. steel ring buckling; 221. inserting holes; 23. a threaded steel bar; 24. a detachable steel barrel; 241. a semi-circular flange steel barrel; 242. bolt holes; 25. a high pressure pipe clamp; 26. a tail pressure-bearing steel plate; 261. grouting holes; 27. bolts and nuts; 3. portable single/double fluid grouting systems; 31. hollow grouting steel pipes; 32. a high-pressure grouting pipe; 33. a dual fluid mixing interface; 34. portable single/double fluid grouting pumps.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 11, the invention provides a novel coal and rock mass crushing variable-load pressurized grouting test device, which comprises a coal and rock mass crushing loading system 1, a bearing sealing system 2 and a portable single/double-liquid grouting system 3; wherein the content of the first and second substances,
the broken coal rock mass loading system 1 comprises a manual hydraulic pump 11, a high-pressure oil pipe 12, a hydraulic jack 13 and a detachable loading steel column 14, wherein the manual hydraulic pump 11 is connected with the hydraulic jack 13 through the high-pressure oil pipe 12, the detachable loading steel column 14 comprises a plurality of sections of loading steel columns, two adjacent sections of loading steel columns are detachably connected, and a first section of loading steel column 141 of the detachable loading steel column 14 is fixedly connected with a piston rod of the hydraulic jack 13; the specific structures of the manual hydraulic pump 11 and the hydraulic jack 13 are well known in the prior art;
the bearing and sealing system 2 comprises a pressurizing bearing steel frame set, a detachable closed sealing steel barrel and a tail pressure-bearing steel plate, the pressurizing bearing steel frame set comprises a bearing steel plate 21, a steel ring buckle 22 and a plurality of threaded steel bars 23, the hydraulic jack 13 is fixedly placed on the inner surface of the bearing steel plate 21, the steel ring buckle 22 is configured opposite to the bearing steel plate 21, the last section of loading steel column 142 of the detachable loading steel column 14 is inserted into a through hole 221 preset in the middle of the steel ring buckle 22, the plurality of threaded steel bars 23 are fixedly inserted into a plurality of threaded steel through holes 211 preset around the surfaces of the bearing steel plate 21 and the steel ring buckle 22, and therefore the bearing steel plate 21 and the steel ring buckle 22 are fixedly connected through the threaded steel bars 23; the detachable closed type sealing steel barrel comprises a plurality of sections of fixedly connected detachable steel barrels 24, the detachable steel barrels 24 are formed by sealing and combining two identical semicircular flange steel barrels 241, the two identical semicircular flange steel barrels 241 are detachably designed, so that a sample after grouting can be conveniently taken out without damaging a test piece after a test, a high-pressure pipe hoop 25 enabling the two semicircular flange steel barrels 241 to be tightly combined is sleeved on the barrel body of the detachable steel barrel 24, a plurality of bolt holes 242 are formed in the peripheries of a front end fixed connection surface and a rear end fixed connection surface of the detachable steel barrel 24, the front end fixed connection surface of the first section of the detachable steel barrel of the detachable closed type sealing steel barrel is in tight contact with the outer surface of the steel ring buckle 22, and a plurality of threaded steel bars 23 are fixedly inserted in the bolt holes 242 of the front end fixed connection surface, under the action of the hydraulic jack 13, the detachable loading steel column 14 can pass through a preset insertion hole 221 in the middle of the steel ring buckle 22, enter the hollow interior of the detachable closed type sealed steel barrel and move towards the bottom of the detachable closed type sealed steel barrel, so that the loading on the crushed coal rock mass is realized, namely, in the test process, the detachable loading steel column 14 can enter the detachable steel barrel 24 to apply a specific loading stress; the middle of the tail bearing steel plate 26 is provided with a grouting hole 261, the periphery of the surface of the tail bearing steel plate is provided with a plurality of bolt holes 242, the rear end fixed connecting surface of the last section of detachable steel barrel of the detachable closed type sealing steel barrel is in close contact with the surface of the tail bearing steel plate 26 through a gasket ring, bolts penetrate through the rear end fixed connecting surface and the plurality of bolt holes 242 of the tail bearing steel plate 26 and are connected and fixed through nuts, namely, the rear end fixed connecting surface of the tail bearing steel plate 26 and the rear end fixed connecting surface of the last section of detachable steel barrel are fixedly connected through bolts and nuts 27;
the portable single/double liquid grouting system 3 comprises a hollow grouting steel pipe 31, a high-pressure grouting pipe 32, a double liquid mixing interface 33 and a portable single/double liquid grouting pump 34, wherein one end of the hollow grouting steel pipe 31 is fixedly connected with a grouting hole 261 of the tail pressure-bearing steel plate 26, and the other end of the hollow grouting steel pipe is connected with the portable single/double liquid grouting pump 34 through the double liquid mixing interface 33 through the high-pressure grouting pipe 32; the specific structures of the double-liquid mixing interface 33 and the portable single/double-liquid grouting pump 34 are the prior art well known to those skilled in the art, and one kind of chemical grout or two kinds of chemical grout fully mixed through the double-liquid mixing interface 33 can be injected into the crushed coal rock body according to the test requirements by arranging the portable single/double-liquid grouting pump 34.
Compared with the prior art, when the novel variable-load pressurizing and grouting test device for the crushed coal rock mass is used, firstly, the crushed coal rock mass with the specific grain diameter combination which is sieved in advance is loaded into the detachable closed type sealing steel barrel, tamping is carried out after the loading so as to ensure that the internal pressure is uniform during pressurizing, after the loading is finished, the pressurizing bearing steel frame group is connected with the detachable closed type sealing steel barrel in a combined way, then, the pressure is pressurized to the set pressure through the manual hydraulic pump, the loading pressure can be randomly set between 0 and 30MPa according to the test requirements, the loading pressure is stable after the constant pressure is 10min, chemical grout is injected into the load-bearing crushed coal rock mass through the portable single/double-liquid grouting system after the loading pressure is stable, the grouting pressure can also be adjusted between 0 and 15MPa according to the test requirements, when the grouting pressure is stable, the pressure is not reduced or the grouting time exceeds 10min, the experiment is ended; after the experiment is finished, the diffusion rule of the chemical slurry in the crushed coal rock mass can be analyzed by splitting the steel barrel, and the consolidation condition is evaluated. In the test device, the loading steel column is driven to move towards the inside of the sealed steel barrel through the pressurization of the manual hydraulic pump, so that the specific loading stress is applied to the crushed coal rock mass in the sealed steel barrel, the influence of the ground stress on the crushed coal rock mass on the grouting effect is considered, and the grouting effect can be predicted by comprehensively considering the grading of different crushed rock masses and the magnitude of the ground stress on the increasingly complex engineering problems; simultaneously, the test device has the advantages of simplicity, easiness in transferring, convenience in operation, remarkable effect, wide applicability, easiness in processing of consolidated rock masses after grouting reinforcement for carrying out conventional single-axis (three-axis) experiments and the like, can reflect the diffusion range and the consolidation effect of grout in broken rock masses under different stress (namely different loading pressures) conditions, and can be widely applied to the grouting reinforcement research of broken rock masses in the fields of civil engineering, tunnels, highways, bridges, mining and the like.
As a specific embodiment, please refer to fig. 3, both ends of each section of the loading steel column are provided with a connection hole 143, a deformed steel bar 144 for connecting two adjacent sections of the loading steel columns is screwed in the connection hole 143, that is, the two adjacent sections of the loading steel columns are detachably connected through the threaded connection between the deformed steel bar 144 and the connection hole 143, and a circular groove 145 for facilitating the insertion of a piston rod of a hydraulic jack is provided at the front end of the first section of the loading steel column 141 of the detachable loading steel column 14, that is, the connection with the hydraulic jack 13 is realized through the circular groove 145.
As a specific example, please refer to fig. 2, wherein the detachable loading steel column 14 comprises four (A, B, C, D) loading steel columns with equal lengths, and the length of the detachable loading steel column can be specifically selected according to the amount of the crushed material loaded, and the inventor of the present application has found through experiments that, according to the penetration effect of the slurry in the crushed coal rock mass, the application can fully meet the requirements of the test by using the four loading steel columns during the use process.
As a specific embodiment, please refer to fig. 4 and 5, a circular slot 212 is disposed on an inner surface of the bearing steel plate 21 for facilitating the fixed placement of the hydraulic jack 13, and specifically, the base of the hydraulic jack 13 is buckled into the circular slot 212 prefabricated on the bearing steel plate 21, so that the fixed placement of the hydraulic jack 13 on the inner surface of the bearing steel plate 21 can be achieved.
As a specific embodiment, please refer to fig. 6, a joint of the two identical semicircular flange steel barrels 241 is a Z-shaped structure, and a sealing strip is disposed between the joints of the Z-shaped structure, so that the sealing reliability of the two semicircular flange steel barrels 241 can be better ensured when the two semicircular flange steel barrels 241 are combined.
As a specific example, please refer to fig. 1, the detachable closed type sealing steel barrel comprises two sections (i, ii) of fixedly connected detachable steel barrel 24, a sealing rubber ring (not shown) is disposed between a rear end fixed connection surface of the first section of detachable steel barrel and a front end fixed connection surface of the second section of detachable steel barrel, and is fixedly connected by a nut through bolts inserted into a plurality of bolt holes 242 arranged around the front and rear end fixed connection surfaces, i.e. the front and rear end fixed connection surfaces of the two sections of detachable steel barrel 24 are fixedly connected by bolts and nuts 27, and the length of the single section of detachable steel barrel 24 is equal to the length of the detachable loading steel column 14, thereby facilitating the detachable loading steel column 14 to densify the crushed rock samples filled in one section of detachable steel barrel 24, and then densify the crushed rock samples filled in the other section of detachable steel barrel 24, which not only ensures the densification effect of the crushed rock samples, but also ensures the loading efficiency of the broken rock sample, and further can well meet the test requirements of the broken coal rock mass loading grouting. Also, it will be understood by those skilled in the art that when the releasably closed sealed ladle includes only one detachable steel ladle 24, the first detachable steel ladle and the last detachable steel ladle are referred to as the same detachable steel ladle 24.
As a specific example, referring to fig. 1, two high-pressure pipe hoops 25 are sleeved on the body of each section of the detachable steel drum 24 at intervals, so that it is better to ensure that two semicircular flange steel drums 241 are tightly combined into a complete steel drum.
As a specific embodiment, six threaded steel through holes are uniformly preset around the surfaces of the bearing steel plate 21 and the steel ring buckle 22, and six bolt holes 242 corresponding to the threaded steel through holes are arranged around the front end fixed connection surface and the rear end fixed connection surface of the detachable steel barrel 24 and the surface of the tail pressure-bearing steel plate 26, so that the bearing steel plate 21 and the steel ring buckle 22, the steel ring buckle 22 and the front end fixed connection surface of the detachable steel barrel 24, and the rear end fixed connection surface of the detachable steel barrel 24 and the tail pressure-bearing steel plate 26 can be stably connected through the bolt and nut 27.
As a specific embodiment, a sealing ring padded between the fixed connection surface of the rear end of the last detachable steel barrel 24 and the surface of the tail bearing steel plate 26 is located between the grouting hole 261 and the bolt hole 242 of the tail bearing steel plate 26, so that slurry leakage during grouting can be better prevented.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. A novel variable-load pressurized grouting test device for a crushed coal rock mass is characterized by comprising a crushed coal rock mass loading system, a load bearing sealing system and a portable single/double-liquid grouting system; wherein the content of the first and second substances,
the broken coal rock mass loading system comprises a manual hydraulic pump, a high-pressure oil pipe, a hydraulic jack and a detachable loading steel column, wherein the manual hydraulic pump is connected with the hydraulic jack through the high-pressure oil pipe, the detachable loading steel column comprises a plurality of sections of loading steel columns, two adjacent sections of loading steel columns are detachably connected, and a first section of loading steel column of the detachable loading steel column is fixedly connected with a piston rod of the hydraulic jack;
the bearing sealing system comprises a pressurizing bearing steel frame group, a detachable closed sealing steel barrel and a tail bearing steel plate, the pressurizing bearing steel frame group comprises a bearing steel plate, a steel ring buckle and a plurality of threaded steel bars, the hydraulic jack is fixedly arranged on the inner surface of the bearing steel plate, the steel ring buckle is configured relative to the bearing steel plate, the last section of loading steel column of the detachable loading steel column is inserted into a preset inserting hole in the middle of the steel ring buckle, and the plurality of threaded steel bars are fixedly inserted into a plurality of threaded steel inserting holes preset around the surfaces of the bearing steel plate and the steel ring buckle; the detachable closed type sealing steel barrel comprises a plurality of sections of detachable steel barrels which are fixedly connected, the detachable steel barrel is formed by sealing and combining two identical semicircular flange steel barrels, the barrel body of the detachable steel barrel is sleeved with a high-pressure pipe hoop which enables the two semicircular flange steel barrels to be tightly combined, a plurality of bolt holes are arranged around the front end fixed connection surface and the rear end fixed connection surface of the detachable steel drum, the front end fixed connecting surface of the first section of the detachable and closed type sealing steel barrel is tightly contacted with the outer surface of the steel ring buckle, the plurality of threaded steel bars are fixedly inserted into the plurality of bolt holes in the front end fixed connection surface, and the detachable loading steel column can penetrate through a preset insertion hole in the middle of the steel ring buckle under the action of the hydraulic jack, enter the hollow interior of the detachable closed type sealing steel barrel and move towards the bottom of the detachable closed type sealing steel barrel; the middle of the tail part pressure-bearing steel plate is provided with a grouting hole, the periphery of the surface of the tail part pressure-bearing steel plate is provided with a plurality of bolt holes, the rear end fixed connecting surface of the last section of the detachable closed type sealing steel barrel is in close contact with the surface of the tail part pressure-bearing steel plate through a gasket, and bolts penetrate through the rear end fixed connecting surface and the plurality of bolt holes of the tail part pressure-bearing steel plate and are connected and fixed through nuts;
the portable single/double-liquid grouting system comprises a hollow grouting steel pipe, a high-pressure grouting pipe, a double-liquid mixing interface and a portable single/double-liquid grouting pump, wherein one end of the hollow grouting steel pipe is fixedly connected with a grouting hole of the tail pressure-bearing steel plate, and the other end of the hollow grouting steel pipe passes through the double-liquid mixing interface and is connected with the portable single/double-liquid grouting pump through the high-pressure grouting pipe.
2. The novel test device for variable-load pressurized grouting of crushed coal rock mass according to claim 1, characterized in that connecting holes are formed in both ends of each section of the loading steel column, deformed steel bars for connecting two adjacent sections of the loading steel column are screwed in the connecting holes, and a circular groove for facilitating insertion of a piston rod of a hydraulic jack is formed in the front end of the first section of the detachable loading steel column.
3. The novel coal and rock mass crushing variable-load pressurizing grouting test device as claimed in claim 1, wherein the detachable loading steel column comprises four sections of loading steel columns with equal lengths.
4. The novel coal and rock mass crushing variable-load pressurizing grouting test device as claimed in claim 1, wherein a circular clamping groove facilitating fixed placement of a hydraulic jack is formed in the inner surface of the bearing steel plate.
5. The novel variable load pressurization grouting test device for crushed coal and rock masses according to claim 1, characterized in that the joint of the two identical semicircular flange steel barrels is of a Z-shaped structure, and a sealing strip is placed between the joints of the Z-shaped structure.
6. The novel test device for load-variable pressurized grouting of crushed coal rock mass according to claim 1, characterized in that the detachable closed type sealing steel barrel comprises two sections of fixedly connected detachable steel barrels, a sealing rubber ring is placed between the rear end fixed connection surface of the first section of detachable steel barrel and the front end fixed connection surface of the second section of detachable steel barrel, bolts are arranged in a plurality of bolt holes formed around the front end fixed connection surface and the rear end fixed connection surface in a penetrating manner to be fixedly connected through nuts, and the length of the single section of detachable steel barrel is equal to that of the detachable loading steel column.
7. The novel coal and rock mass crushing variable-load pressurizing grouting test device as claimed in claim 1, wherein two high-pressure pipe hoops are sleeved on the barrel body of each section of the detachable steel barrel at intervals.
8. The novel variable-load pressurized grouting test device for crushed coal rock bodies according to claim 1, characterized in that six deformed steel bar through holes are uniformly preset around the surfaces of the bearing steel plates and the steel ring buckles, and six bolt holes corresponding to the deformed steel bar through holes are arranged around the surfaces of the front end fixed connection surface and the rear end fixed connection surface of the detachable steel barrel and the tail pressure-bearing steel plate.
9. The novel coal and rock mass crushing variable-load pressurizing grouting test device as claimed in claim 1, wherein a sealing ring padded between the fixed connecting surface at the rear end of the last section of detachable steel barrel and the surface of the tail pressure-bearing steel plate is positioned between a grouting hole and a bolt hole of the tail pressure-bearing steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010317962.5A CN111487163B (en) | 2020-04-21 | 2020-04-21 | Novel variable-load pressurizing grouting test device for fractured coal and rock mass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010317962.5A CN111487163B (en) | 2020-04-21 | 2020-04-21 | Novel variable-load pressurizing grouting test device for fractured coal and rock mass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111487163A true CN111487163A (en) | 2020-08-04 |
| CN111487163B CN111487163B (en) | 2022-11-29 |
Family
ID=71813022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010317962.5A Active CN111487163B (en) | 2020-04-21 | 2020-04-21 | Novel variable-load pressurizing grouting test device for fractured coal and rock mass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111487163B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112270883A (en) * | 2020-11-05 | 2021-01-26 | 上海市建筑科学研究院有限公司 | Simulation test device for representing filling property of grouting material |
| CN114088521A (en) * | 2021-10-28 | 2022-02-25 | 中国矿业大学 | Testing device and testing method for coal rock mass grouting |
| CN114279905A (en) * | 2021-12-30 | 2022-04-05 | 重庆大学 | Device and method for simulating drilling cuttings generation |
Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4225546A (en) * | 1977-07-14 | 1980-09-30 | General Electric Company | Method of compacting dry powder into shapes |
| JPH11303598A (en) * | 1998-04-22 | 1999-11-02 | Shimizu Corp | Shearing strength testing method of grout and natural ground |
| CN103267722A (en) * | 2013-05-07 | 2013-08-28 | 中国矿业大学 | Pressure bearing permeation grouting strengthening test apparatus and method |
| CN103529188A (en) * | 2013-10-12 | 2014-01-22 | 安徽理工大学 | Coal and gas outburst permeation instability test device |
| CN103940967A (en) * | 2014-04-30 | 2014-07-23 | 山东大学 | Grouting model test device capable of loading crustal stress and pore water pressure and method thereof |
| CN104374680A (en) * | 2014-11-07 | 2015-02-25 | 山东大学 | Slip casting diffusion testing device and testing method using same |
| CN104440760A (en) * | 2014-07-29 | 2015-03-25 | 成都远峰科技发展有限公司 | Pressing tool capable of being used for flexible graphite packing rings of different diameters |
| CN204255813U (en) * | 2014-11-07 | 2015-04-08 | 山东大学 | Slip casting diffusion test device |
| CN204694490U (en) * | 2015-06-30 | 2015-10-07 | 重庆大学 | Bedding plane landslide test unit is adopted in mine |
| CN105842032A (en) * | 2016-05-10 | 2016-08-10 | 广东工业大学 | Soil sample moulding and demoulding device |
| CN106680466A (en) * | 2017-02-06 | 2017-05-17 | 同济大学 | Device for simulating soil groundwater oxygen content gradient distribution under hydrostatic condition |
| CN206811135U (en) * | 2017-05-23 | 2017-12-29 | 自贡硬质合金有限责任公司 | Assembling die for the production of hard alloy micropore heterotype tubing |
| CN107632116A (en) * | 2017-09-01 | 2018-01-26 | 山东大学 | A kind of three-dimensional grouting model test servo-control system and test method |
| CN207036531U (en) * | 2017-08-11 | 2018-02-23 | 西安科技大学 | A kind of manipulated soil sample preparation device |
| CN108204935A (en) * | 2018-01-10 | 2018-06-26 | 中南大学 | The experimental provision and experimental method of diffusion pressure microcosmic mechanism during characterization slip casting |
| CN108362859A (en) * | 2018-02-02 | 2018-08-03 | 山东科技大学 | A kind of experimental system for simulating old goaf grouting effect |
| CN108444888A (en) * | 2018-04-17 | 2018-08-24 | 中国矿业大学 | A kind of fractured coal and rock osmotic grouting visual test device and its test method |
| CN109187312A (en) * | 2018-10-29 | 2019-01-11 | 重庆大学 | A kind of Novel pole cuts pervasion test device and its test method |
| CN109946128A (en) * | 2019-03-08 | 2019-06-28 | 同济大学 | A kind of subgrade soils test material preparation device |
| CN110286018A (en) * | 2019-07-25 | 2019-09-27 | 泉州装备制造研究所 | A kind of test macro and test method of the basic physical index of slip casting sample |
| CN209460015U (en) * | 2018-12-26 | 2019-10-01 | 河南理工大学 | Combined multi-functional die trial |
| CN209570455U (en) * | 2019-03-12 | 2019-11-01 | 海南大学 | A kind of varying depth stratum vertical deformation bearer properties measurement device |
| US20200072914A1 (en) * | 2018-09-05 | 2020-03-05 | Sun Yat-Sen University | Laboratory test device for permeation grouting of impermeable material |
-
2020
- 2020-04-21 CN CN202010317962.5A patent/CN111487163B/en active Active
Patent Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4225546A (en) * | 1977-07-14 | 1980-09-30 | General Electric Company | Method of compacting dry powder into shapes |
| JPH11303598A (en) * | 1998-04-22 | 1999-11-02 | Shimizu Corp | Shearing strength testing method of grout and natural ground |
| CN103267722A (en) * | 2013-05-07 | 2013-08-28 | 中国矿业大学 | Pressure bearing permeation grouting strengthening test apparatus and method |
| CN103529188A (en) * | 2013-10-12 | 2014-01-22 | 安徽理工大学 | Coal and gas outburst permeation instability test device |
| CN103940967A (en) * | 2014-04-30 | 2014-07-23 | 山东大学 | Grouting model test device capable of loading crustal stress and pore water pressure and method thereof |
| CN104440760A (en) * | 2014-07-29 | 2015-03-25 | 成都远峰科技发展有限公司 | Pressing tool capable of being used for flexible graphite packing rings of different diameters |
| CN104374680A (en) * | 2014-11-07 | 2015-02-25 | 山东大学 | Slip casting diffusion testing device and testing method using same |
| CN204255813U (en) * | 2014-11-07 | 2015-04-08 | 山东大学 | Slip casting diffusion test device |
| CN204694490U (en) * | 2015-06-30 | 2015-10-07 | 重庆大学 | Bedding plane landslide test unit is adopted in mine |
| CN105842032A (en) * | 2016-05-10 | 2016-08-10 | 广东工业大学 | Soil sample moulding and demoulding device |
| CN106680466A (en) * | 2017-02-06 | 2017-05-17 | 同济大学 | Device for simulating soil groundwater oxygen content gradient distribution under hydrostatic condition |
| CN206811135U (en) * | 2017-05-23 | 2017-12-29 | 自贡硬质合金有限责任公司 | Assembling die for the production of hard alloy micropore heterotype tubing |
| CN207036531U (en) * | 2017-08-11 | 2018-02-23 | 西安科技大学 | A kind of manipulated soil sample preparation device |
| CN107632116A (en) * | 2017-09-01 | 2018-01-26 | 山东大学 | A kind of three-dimensional grouting model test servo-control system and test method |
| CN108204935A (en) * | 2018-01-10 | 2018-06-26 | 中南大学 | The experimental provision and experimental method of diffusion pressure microcosmic mechanism during characterization slip casting |
| CN108362859A (en) * | 2018-02-02 | 2018-08-03 | 山东科技大学 | A kind of experimental system for simulating old goaf grouting effect |
| CN108444888A (en) * | 2018-04-17 | 2018-08-24 | 中国矿业大学 | A kind of fractured coal and rock osmotic grouting visual test device and its test method |
| US20200072914A1 (en) * | 2018-09-05 | 2020-03-05 | Sun Yat-Sen University | Laboratory test device for permeation grouting of impermeable material |
| CN109187312A (en) * | 2018-10-29 | 2019-01-11 | 重庆大学 | A kind of Novel pole cuts pervasion test device and its test method |
| CN209460015U (en) * | 2018-12-26 | 2019-10-01 | 河南理工大学 | Combined multi-functional die trial |
| CN109946128A (en) * | 2019-03-08 | 2019-06-28 | 同济大学 | A kind of subgrade soils test material preparation device |
| CN209570455U (en) * | 2019-03-12 | 2019-11-01 | 海南大学 | A kind of varying depth stratum vertical deformation bearer properties measurement device |
| CN110286018A (en) * | 2019-07-25 | 2019-09-27 | 泉州装备制造研究所 | A kind of test macro and test method of the basic physical index of slip casting sample |
Non-Patent Citations (5)
| Title |
|---|
| JIANXIN TANG 等: "STUDY ON PRESSURE SENSITIVE EFFECT OF PERMEABILITY OF RAW COAL WITH CONTAINING GAS AND LOW PERMEABILITY", 《ADVANCED MATERIALS RESEARCH》 * |
| LI ZHIPENG 等: "Experimental Study on the Reinforcement Mechanism of Segmented Split Grouting in a Soft Filling Medium", 《PROCESSES》 * |
| 张家奇 等: "一种新型综合注浆加固试验系统的研制及应用", 《工程科学学报》 * |
| 郭密文 等: "高压环境条件下注浆模型试验系统设计", 《工程地质学报》 * |
| 陈宇龙 等: "煤岩层理效应对甲烷吸附-解吸及渗流规律影响的实验研究", 《采矿与安全工程学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112270883A (en) * | 2020-11-05 | 2021-01-26 | 上海市建筑科学研究院有限公司 | Simulation test device for representing filling property of grouting material |
| CN112270883B (en) * | 2020-11-05 | 2022-06-24 | 上海市建筑科学研究院有限公司 | Simulation test device for representing filling property of grouting material |
| CN114088521A (en) * | 2021-10-28 | 2022-02-25 | 中国矿业大学 | Testing device and testing method for coal rock mass grouting |
| CN114088521B (en) * | 2021-10-28 | 2024-01-12 | 中国矿业大学 | Test device and test method for coal rock mass grouting |
| CN114279905A (en) * | 2021-12-30 | 2022-04-05 | 重庆大学 | Device and method for simulating drilling cuttings generation |
| CN114279905B (en) * | 2021-12-30 | 2024-03-26 | 重庆大学 | Device and method for simulating generation of drilling cuttings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111487163B (en) | 2022-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111487163B (en) | Novel variable-load pressurizing grouting test device for fractured coal and rock mass | |
| CN108445193B (en) | Grouting test system for prefabricated crack-containing rock mass under excavation stress and use method | |
| Anda et al. | Effects of pressurizing timing on air booster vacuum consolidation of dredged slurry | |
| Shalabi et al. | Concrete segment tunnel lining sealant performance under earthquake loading | |
| US8182178B2 (en) | Directional fracture grouting method with polymer for seepage control of dikes and dams | |
| CN111487164B (en) | Novel load-variable pressurizing grouting test method for crushed coal rock mass | |
| CN104297457A (en) | Three-dimensional grouting model test device and method | |
| CN110887775A (en) | System and method for testing permeability of triaxial slurry of post-peak fractured rock | |
| Aziz et al. | Double shear testing of bolts | |
| CN109540769A (en) | A kind of bending seepage flow test device and test method based on acoustic emission detection technology | |
| CN111505237A (en) | Residual coal re-mining broken coal rock mass grouting modification test device and test method | |
| Li et al. | Laboratory investigations into the failure mechanisms of new yielding and inflatable rockbolts under axial and shearing loading conditions | |
| CN106996302A (en) | Bore the integrated anchorage technology multi-function test stand of envelope note and its test method | |
| CN108181178B (en) | Simulation test device and test method for broken surrounding rock prestressed anchorage injection reinforcement | |
| Cao | Bolt profile configuration and load transfer capacity optimisation | |
| DE2932430A1 (en) | Tunnel tube concrete lining in loose rock - has fluid concrete pressed into annular gap at pressure above rock pressure | |
| CN204154718U (en) | A kind of three-dimensional slip casting model test apparatus | |
| CN213632993U (en) | True triaxial loose rock-soil medium splitting grouting test device | |
| JP2019100083A (en) | Ground reinforcing method and injection pipe device | |
| CN114659955B (en) | Micro-power grouting test device and application method thereof | |
| Barley | Properties of anchor grouts in a confined state | |
| CN110424989B (en) | Primary support structure of ultra-large span underground engineering in hard rock area and construction method thereof | |
| CN211646498U (en) | Device for measuring bonding strength and filter pressing effect of slurry and soil body | |
| JP2003166242A (en) | Execution method for earth-retaining timbering and bag body therefor | |
| Yang et al. | Experimental study on grout reinforcement mechanism in deep fractured mudstone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |