Testing device for measuring compaction bleeding of gangue slurry

Abstract

The utility model discloses a test device for gangue slurry compaction bleeding measurement, which comprises a drainage base, a sleeve, a top cover and a piston rod, the bottom end of the sleeve is detachably fixed on the drainage base, the top cover is fixed at the top end of the sleeve, the piston rod is arranged in the sleeve, and a dowel bar of the piston rod penetrates through the top cover and can slide relative to the top cover. A piston head of the piston rod is located in the sleeve, is in sealing fit with the inner wall of the sleeve and can slide along the inner wall of the sleeve, a drainage hole is formed in the piston head and vertically penetrates through the piston head, and a water guide pipe is arranged at a top hole opening of the drainage hole; the end, away from the drainage hole, of the water guide pipe penetrates through the top cover, extends to the outer side of the sleeve and is connected to the collecting and measuring assembly. According to the utility model, single-sided compaction bleeding and double-sided compaction bleeding performance tests of the gangue slurry can be realized, so that the purpose of more properly simulating an actual engineering environment is achieved, and the compaction bleeding performance and the bearing capacity of different gangue slurries can be better evaluated.

Description

Technical Field

[0001] The utility model relates to the technical field of mine filling, and particularly relates to a test device for measuring the compaction and water seepage of gangue slurry. Background Art

[0002] Gangue generally refers to the intercalated gangue in coal seams, the roof and floor rocks of coal seams mixed in the mined coal, and also includes the rocks in the driven rock roadways, etc., which often contain mudstone and sandstone. With the development of mine coal resources and the emergence of associated problems in coal mining "under the three types of land", problems such as the huge original gangue accumulation, the increasing annual discharge amount at present, and the increasing occupied area have become more and more serious.

[0003] To meet the needs of the development of the mining industry, the mine filling technology has gradually formed and developed. Common underground filling methods include waste rock filling, roadway filling, fully mechanized filling, pumped cementitious filling, paste filling, high-water filling, etc. Although the theoretical research and technical application of these methods have gradually become mature and perfect, there are inevitably spatio-temporal interference problems, which limit the scope of application of each filling method. Gangue slurry filling has gradually attracted the attention of enterprises and scientific research institutions due to its advantages such as wide material sources, large consumption of gangue, and simple and easy technology. Many policies have also been introduced in China to support the popularization of gangue slurry filling technology. A good gangue grouting filling technology can improve the filling effect and create more economic value and environmental value. Some studies have shown that using gangue filling has the effects of controlling surface subsidence and preventing gangue spontaneous combustion. When the gangue slurry enters the filling position, its compaction and water seepage performance has an important impact on the bearing capacity. However, the existing test devices for measuring the compaction and water seepage performance of gangue slurry have relatively single structural functions, and their water seepage holes are generally arranged at the bottom of the device. Considering the actual engineering environment, the gangue slurry usually drains at the top (the bottom is an impermeable formation) under the action of pressure, or drains at the top and bottom (the bottom is a permeable formation). Therefore, the existing water seepage test devices have limited simulation matching degree for the actual engineering environment. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a test device for measuring the compaction and water seepage of gangue slurry to solve the technical problems described in the background art.

[0005] To achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] An experimental device for measuring the compaction and water secretion of gangue slurry, comprising a drainage base, a sleeve, a top cover and a piston rod. The bottom end of the sleeve is fixedly attached to the drainage base in a detachable manner, and the sleeve is in sealed cooperation with the drainage base. The top end of the sleeve is fixedly attached with a top cover in a detachable manner, and a piston rod is arranged inside the sleeve. The transmission rod of the piston rod penetrates through the top cover and can slide relative to the top cover. The push plate of the piston rod is located above the top cover, and the push plate is fixedly connected to the transmission rod in a detachable manner. The piston head of the piston rod is located inside the sleeve, and the piston head is in sealed cooperation with the inner wall of the sleeve and can slide along the inner wall of the sleeve. Drainage holes are formed in the piston head, the drainage holes vertically penetrate the piston head, and a water guide pipe is arranged at the top hole of the drainage hole. One end of the water guide pipe away from the drainage hole penetrates through the top cover and extends to the outside of the sleeve and is connected to a collection and measurement component.

[0007] Preferably, drainage holes are also formed in the drainage base, the drainage holes penetrate through the drainage base, and a water guide pipe is arranged at the bottom hole of the drainage hole. One end of the water guide pipe away from the drainage hole is connected to a collection and measurement component.

[0008] Preferably, a permeable sieve plate is fixedly arranged at the bottom end of the piston head and the top end of the drainage base.

[0009] Preferably, several circles of annular diversion grooves are formed at the top end of the drainage base, the diversion grooves of each circle are communicated with each other, the drainage base between adjacent diversion grooves forms a support protrusion, and the opening position of the drainage hole formed in the drainage base is located in the diversion groove.

[0010] Preferably, a check valve is arranged at one end of the water guide pipe close to the drainage hole. The check valve allows the water in the sleeve to flow into the water guide pipe, but does not allow the water in the water guide pipe to flow back into the sleeve.

[0011] Preferably, the drainage base includes a base body, a groove is formed in the middle of the base body, and the outlet of the drainage hole and the check valve installed at the outlet position of the drainage hole are both located in the groove.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: The utility model can measure the water secretion situation of gangue filling slurry during the compaction process under different vertical loads. At the same time, according to needs, different drainage situations can be simulated by replacing the drainage base, and the single-sided compaction water secretion and double-sided compaction water secretion performance tests of gangue slurry can be realized, so as to more appropriately simulate the actual engineering environment, and then better evaluate the compaction water secretion performance and bearing capacity of different gangue slurries. Description of the Drawings

[0013] Through the following detailed description with reference to the accompanying drawings, the above and / or other aspects and advantages of the present utility model will become clearer and easier to understand. These drawings are only schematic and do not limit the present utility model, where:

[0014] Figure 1 It is a schematic structural diagram of a test device (single-sided water seepage) for measuring the compaction water seepage of gangue slurry involved in the present utility model;

[0015] Figure 2 is Figure 1 the sectional structural diagram of;

[0016] Figure 3 is Figure 1 the structural diagram of the drainage base in;

[0017] Figure 4 It is a schematic structural diagram of a test device (double-sided water seepage) for measuring the compaction water seepage of gangue slurry involved in the present utility model;

[0018] Figure 5 is Figure 4 the sectional structural diagram of;

[0019] Figure 6 is Figure 4 the structural diagram of the drainage base in.

[0020] Reference numerals: 1, drainage base; 101, base body; 102, groove; 2, piston rod; 201, push plate; 202, force transmission rod; 203, piston head; 3, sleeve; 4, top cover; 5, drainage hole; 6, permeable sieve plate; 7, check valve; 8, water guide pipe; 9, connecting bolt; 10, diversion groove; 11, support protrusion. Specific embodiments

[0021] Hereinafter, an embodiment of a test device for measuring the compaction water seepage of gangue slurry according to the present utility model will be described with reference to the accompanying drawings. The embodiments described herein are specific specific embodiments of the present utility model for explaining the concept of the present utility model, and are all explanatory and exemplary, and should not be construed as limiting the embodiments of the present utility model and the scope of the present utility model. Except for the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and the specification of the present application. These technical solutions include technical solutions that make any obvious substitutions and modifications to the embodiments described herein.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "front", "rear", "left", "right", "top", "bottom", "upper", "lower", "inner", "outer", "horizontal", "vertical", "upright", "oblique", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] The drawings in this specification are schematic diagrams to assist in illustrating the concept of the present utility model, schematically showing the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of the components in the embodiments of the present utility model, the drawings are not drawn in the same proportion. The same reference numerals are used to represent the same parts.

[0024] The principles and features of the present utility model will be described below in conjunction with the drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model. The following combines Figures 1-6 , and further details of the preferred embodiments of the present utility model are described as follows:

[0025] As Figures 1-6 shown, a preferred test device for measuring the compaction and water seepage of gangue slurry of the present utility model includes a drainage base 1, a sleeve 3, a top cover 4, and a piston rod 2. The bottom end of the sleeve 3 is fixedly connected to the drainage base 1 in a detachable manner, and the sleeve 3 is in sealed cooperation with the drainage base 1. The top end of the sleeve 3 is fixedly connected with a top cover 4 in a detachable manner, and a piston rod 2 is arranged in the sleeve 3. The transmission rod 202 of the piston rod 2 penetrates through the top cover 4 and can slide relative to the top cover 4. The push plate 201 of the piston rod 2 is located above the top cover 4, and the push plate 201 and the transmission rod 202 are fixedly connected in a detachable manner. The piston head 203 of the piston rod 2 is located in the sleeve 3, and the piston head 203 is in sealed cooperation with the inner wall of the sleeve 3 and can slide along the inner wall of the sleeve 3. A plurality of rubber rings can be added at the side wall position of the piston head 203 as needed to improve the sealing performance at the joint between it and the inner wall of the sleeve 3. A drainage hole 5 is formed in the piston head 203. The drainage hole 5 vertically penetrates the piston head 203, and a water guide pipe 8 is arranged at the top hole of the drainage hole 5. One end of the water guide pipe 8 away from the drainage hole 5 penetrates through the top cover 4 and extends to the outside of the sleeve 3 and is connected to the collection and measurement assembly;

[0026] In some embodiments, for the convenience of assembling the drainage base 1, the sleeve 3, and the top cover 4, the drainage base 1 and the sleeve 3, as well as the sleeve 3 and the top cover 4, are connected and fixed by connecting bolts 9. For this purpose, the drainage base 1 is designed in a structural form including a base body 101 and a groove 102. A circular groove 102 is formed in the middle of the base body 101. The arrangement of the groove 102 enables a circular protruding wing ring to be formed at the top of the base body 101 to facilitate the passing of the connecting bolts 9. Similarly, outwardly protruding wing rings need to be provided at both ends of the sleeve 3. Of course, bolt holes need to be reserved correspondingly on the wing ring of the drainage base 1, the wing ring of the sleeve 3, and the outer edge of the top cover 4 to facilitate the passing and fixing of the connecting bolts 9;

[0027] As Figures 4-6 shown, in some embodiments, in order to better simulate the water bleeding condition of the gangue slurry, drainage holes 5 are also formed in the drainage base 1. The drainage holes 5 penetrate through the drainage base 1, and a water guide pipe 8 is provided at the bottom orifice of the drainage holes 5. The end of the water guide pipe 8 away from the drainage holes 5 is connected to the collection and measurement assembly. The drainage holes 5 formed in the drainage base 1 can cooperate with the drainage holes 5 formed at the piston head 203 to achieve a double-sided water bleeding test to meet the test requirements under different working conditions;

[0028] To avoid the problem of orifice blockage caused by fine gangue particles entering the drainage holes 5, in some embodiments, a permeable sieve plate 6 is fixedly provided at the bottom end of the piston head 203 and the top end of the drainage base 1. The permeable sieve plate 6 can block the fine granular gangue outside the orifice and prevent it from entering the drainage holes 5, ensuring that the drainage holes 5 can always be in an unobstructed drainage state;

[0029] To improve the drainage capacity of the drainage base 1, in some embodiments, several circles of annular diversion grooves 10 are formed on the top surface of the drainage base 1. The diversion grooves 10 in each circle are interconnected through radial diversion grooves 10. The drainage base 1 between adjacent diversion grooves 10 forms a support protrusion 11 as a support platform for the permeable sieve plate 6 and the gangue slurry. The opening position of the drainage holes 5 formed in the drainage base 1 is located within the diversion grooves 10 to facilitate the water collected in the diversion grooves 10 to flow smoothly into the drainage holes 5 and then be introduced into a collection and measurement assembly such as a graduated cylinder or a measuring cup through the water guide pipe 8. Of course, in some embodiments, in order to enable the water in the diversion grooves 10 to better converge at the opening position of the drainage holes 5, the diversion grooves 10 can be provided with a drainage slope inclined towards the opening position of the drainage holes 5. On this basis, the top surfaces of the support protrusions 11 need to be uniformly arranged on a horizontal plane so that the gangue slurry on the top of the drainage base 1 can be evenly stressed in the radial direction;

[0030] To ensure the smooth progress of the test and the accuracy of the measurement results, a switching valve should be preferably provided at the end of the water conduit 8. Considering that the water conduit 8 has a certain length, to further improve the measurement accuracy, the retained water in the water conduit 8 needs to be used as a correction amount to correct the measurement results. To prevent the water in the water conduit 8 from flowing back, in some embodiments, a check valve 7 is provided at one end of the water conduit 8 close to the drain hole 5. The check valve 7 allows the water in the sleeve 3 to flow into the water conduit 8, but does not allow the water in the water conduit 8 to flow back into the sleeve 3. On this basis, to make full use of the effective space at the drainage base 1, the outlet of the drain hole 5 and the check valve 7 installed at the outlet position of the drain hole 5 are preferably provided in the groove 102. The space of the groove 102 can play a protective role for the flange of the drainage base 1, avoiding structural damage to the orifice of the drain hole 5 and the check valve 7 caused by accidental collision.

[0031] When conducting a specific test with the present utility model, first, according to the drainage scheme formulated for the test, select the corresponding drainage base 1. Then, install the water conduit 8 and the check valve 7 at the orifice of the drain hole 5, and tighten the switching valve at the orifice of the water conduit 8 to close it. Then, connect and fix the drainage base 1 and the sleeve 3 with the connecting bolts 9 and ensure that the joint between the two is in a sealed state. Then, fill a certain amount of gangue slurry into the cavity of the sleeve 3, place the force transfer rod 202 and the piston head 203 of the piston rod 2, and then install the top cover 4 and the push plate 201 in sequence. When installing the top cover 4, it is necessary to ensure that the water conduit 8 passes through the through hole reserved on the top cover 4. Then, install and tighten the connecting bolts 9 at the upper edge of the top cover 4 and the sleeve 3. Next, put the other end of the water conduit 8 into the bleeding measuring cylinder, open the switching valve at the orifice of the water conduit 8, start the press. As the pressure increases, the bleeding volume gradually increases and the volume of the slurry is gradually compressed. The present utility model can obtain the bleeding volume under the set pressure conditions according to the requirements set for the test, or continuously load until the bleeding volume no longer changes.

[0032] The present utility model can quantitatively measure the compaction bleeding conditions of gangue slurries with different particle gradations and mass concentrations under the condition of applying vertical loads. Under the action of the applied vertical load, the water in the slurry will gradually drain out of the original slurry as the pressure increases and the pores between the particles are filled and compacted. In different filling environments, the drainage conditions of the roof and the floor are not the same. Currently, the academic community generally believes that the drainage path can be divided into two cases: single-sided drainage and double-sided drainage. The present utility model can realize the tests on the single-sided compaction bleeding and double-sided compaction bleeding performances of gangue slurries, and then evaluate the compaction bleeding performances and bearing capacities of different gangue slurries under different drainage path conditions.

[0033] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A test device for measuring water seepage during compaction of gangue slurry, characterized by: The invention comprises a drainage base (1), a sleeve (3), a top cover (4) and a piston rod (2); the bottom end of the sleeve (3) is fixed to the drainage base (1) in a detachable manner, and the sleeve (3) and the drainage base (1) are sealed together; the top end of the sleeve (3) is fixed to the top cover (4) in a detachable manner, and the sleeve (3) is provided with a piston rod (2) in the sleeve (3); the force transmission rod (202) of the piston rod (2) passes through the top cover (4) and can slide relative to the top cover (4); the push plate (201) of the piston rod (2) is located above the top cover (4), and the push plate (201) The piston rod (2) is fixedly connected to the force transmission rod (202) in a detachable manner. The piston head (203) of the piston rod (2) is located in the sleeve (3). The piston head (203) is sealed with the inner wall of the sleeve (3) and can slide along the inner wall of the sleeve (3). A drainage hole (5) is provided on the piston head (203). The drainage hole (5) vertically penetrates the piston head (203). A water guide pipe (8) is provided at the top opening of the drainage hole (5). The end of the water guide pipe (8) away from the drainage hole (5) penetrates the top cover (4) and extends to the outside of the sleeve (3) and is connected to the collection and measurement component.

2. The test device for measuring water seepage during compaction of gangue slurry according to claim 1, characterized in that: The drainage base (1) is also provided with a drainage hole (5), the drainage hole (5) passes through the drainage base (1), and a water pipe (8) is provided at the bottom opening of the drainage hole (5), and one end of the water pipe (8) away from the drainage hole (5) is connected to the collection and measurement component.

3. The test device for measuring water seepage during compaction of gangue slurry according to claim 2, characterized in that: A water-permeable screen plate (6) is fixedly provided on the bottom end of the piston head (203) and the top end of the drainage base (1).

4. The test device for measuring water seepage during compaction of gangue slurry according to claim 2, characterized in that: The top of the drainage base (1) is provided with a plurality of annular guide grooves (10), the guide grooves (10) are interconnected, the drainage base (1) between adjacent guide grooves (10) forms a support protrusion (11), and the drainage hole (5) provided at the drainage base (1) is located in the guide groove (10).

5. The test device for measuring water seepage during compaction of gangue slurry according to claim 2, characterized in that: A check valve (7) is provided at one end of the water guide pipe (8) close to the drainage hole (5); the check valve (7) allows water in the sleeve (3) to flow into the water guide pipe (8), but does not allow water in the water guide pipe (8) to flow back into the sleeve (3).

6. The test device for measuring water seepage during compaction of gangue slurry according to claim 5, characterized in that: The drainage base (1) comprises a base body (101), a circle of grooves (102) are provided in the middle of the base body (101), and the outlet of the drainage hole (5) and the check valve (7) installed at the outlet of the drainage hole (5) are both located in the groove (102).

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