Grouting filling equipment and process for water-retaining mining in coal mines

Abstract

The present application discloses a grouting filling device and process for water-saving mining in a coal mine, which relates to the field of mining filling technology, and includes: a coordination component, including a pressure gauge and an external interface, and the pressure gauge and the external interface are connected through a transmission pipe; a driving pump, the output end of which is connected to a flow meter, the inlet of the flow meter is connected to the coordination component through the transmission pipe, and the outlet of the flow meter is connected to the grouting component through the transmission pipe; a control valve is arranged between the flow meter and the grouting component, and the grouting component is inserted into the soil layer structure; the grouting component includes: a sleeve pipe, an adapter, a grouting head, a processing pipe, a rotating ring and a support component, so as to provide a technical solution for more uniformly filling the grouting liquid and reducing the risk of remediation.

Description

Technical Field

[0001] The present application relates to the field of mining filling technology, and in particular to a coal mine water conservation mining grouting filling equipment and process. Background Art

[0002] Water-preserving mining grouting technology is a technology used for waterproofing, water blocking and reinforcing surrounding rocks in coal mining. It reduces the damage to aquifers caused by coal mining activities through grouting reinforcement, thereby maintaining the integrity and function of the groundwater system. It utilizes the delamination space formed by the different deflections of the overlying soft and hard rock strata after coal seam mining, and injects a large amount of fly ash, coal gangue and other slurries into the delamination through construction drilling holes to form a composite supporting and bearing structure of "delamination zone filling body + key layer + coal pillar", which controls the key layer and the above strata from breaking, thereby reducing mining ground subsidence, reducing water resource loss, enhancing the stability of the goaf, reducing the risk of ground subsidence and collapse, and reducing the geological disasters caused by it.

[0003] In water-retaining mining grouting, the gangue is crushed to a certain particle size and water is added to form a filling slurry, which is injected into the gaps and cracks of the overlying rock using filling pumps and pipelines to control the deformation of the ground surface, keep the upper strata of the phreatic aquifer from breaking during the mining process, and reduce the disturbance and damage of the upper aquifer caused by mining. However, the filling slurry mainly plays the role of supporting the roof. If the filling is not complete after solidification, it will aggravate surface subsidence and cause disasters. In particular, problems such as insufficient filling or leakage of slurry during the filling process will gradually emerge in the later stage and require frequent remedial filling.

[0004] Therefore, it is necessary to provide a coal mine water conservation mining grouting filling equipment and process to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above purpose, the present application provides the following technical solution: a grouting filling device and process for water-retaining mining in coal mines, comprising:

[0006] A coordination component, comprising a pressure gauge and an external interface, wherein the pressure gauge and the external interface are connected via a transmission pipe;

[0007] A driving pump, the output end of which is connected to a flow meter, the inlet of the flow meter is connected to the coordination component through the transmission pipe, and the outlet of the flow meter is connected to the grouting component through the transmission pipe;

[0008] a control valve disposed between the flow meter and a grouting assembly, wherein the grouting assembly is inserted into the soil structure;

[0009] The grouting assembly includes: a sleeve, an adapter, a grouting head, a processing tube, a rotating ring and a support assembly. The input end of the sleeve is connected to the flow meter through a transmission tube, and the output end of the sleeve is connected to the adapter and the grouting head in sequence. The processing tube is also placed in the sleeve, the rotating ring is arranged in the processing tube, and the support assembly is arranged in the grouting head.

[0010] Further, as a preference, the external interface is used to connect to a storage tank, in which the filling material output by the mixer is stored.

[0011] Furthermore, preferably, the grouting head is conical and a plurality of slots are provided on the circumference of the outer wall of the grouting head, and both ends of the grouting head are connected.

[0012] Further, preferably, a sleeve tube and a connecting seat are sequentially provided at one end of the processing tube, a plurality of connecting holes are evenly distributed on the wall of the processing tube, an end of the connecting seat is fixedly sleeved in the adapter, and the connecting seat, the sleeve tube and the inside of the grouting head are connected.

[0013] Furthermore, preferably, a gap is left between the outer wall of the treatment tube and the inner wall of the sleeve tube, and one end of the treatment tube is exposed in the sleeve tube. The grouting liquid is transmitted through the sleeve tube, diverted into the interior of the treatment tube and the gap between the treatment tube and the sleeve tube, and finally discharged through the grouting head.

[0014] Further, as a preference, the rotating ring includes a triangular support arranged in the center, and the side walls of the triangular support are fixedly connected to the inner wall of the rotating ring through a plurality of fixed through tubes, and a through hole and a groove strip-shaped groove for accommodating a clamping rotating shaft are opened at the center of the triangular support, and the fixed through tube is hollow to allow grouting liquid to flow through.

[0015] Further, preferably, a plurality of driving teeth are evenly distributed on the circumference of the outer wall of the rotating ring, and the driving teeth are arranged obliquely.

[0016] Further, as a preference, the rotating ring is arranged in the sleeve, and the outer wall of the rotating ring maintains a distance from the inner wall of the sleeve, the upper end of the rotating shaft is clamped with the triangular support, and the lower end is connected to the supporting assembly.

[0017] Further, as a preference, the supporting assembly comprises a fixed ring, a fixed cylinder and a rotating seat, the fixed ring being fixed inside the grouting head, close to the tail end of the grouting head, the fixed cylinder being clamped with the inner wall of the grouting head, and a rotating seat being rotatably arranged inside the fixed cylinder, the rotating seat being provided with an empty groove to connect the rotating shaft, and a plurality of through holes being provided on the rotating seat to allow the grouting liquid to pass through.

[0018] A grouting filling process for water-retaining mining in a coal mine comprises the following steps:

[0019] Ⅰ. Through statistical calculation of the boreholes, the thick and hard separation layer of the main key layer is selected as the separation layer grouting layer, and the contour map of the topsoil layer, fracture zone, caving area and thick and hard separation layer is drawn, and grouting is carried out in the separation layer space;

[0020] II. Control the stability of the upper aquifer based on stratified mining and limited mining width according to the mining geology and overburden characteristics of different regions;

[0021] III. Crush the gangue to a certain particle size and add water to make filling slurry, which is then injected into the gaps and cracks of the overburden rock using a driving pump and a transmission pipe;

[0022] IV. Carry out grouting at the determined grouting points. During the grouting process, the grouting pressure and flow rate are monitored by pressure gauges and flow meters to ensure that the slurry can fully fill the predetermined area to achieve the effect of waterproofing and reinforcement.

[0023] Compared with the prior art, the present application provides a coal mine water conservation mining grouting filling equipment and process, which has the following beneficial effects:

[0024] The through hole described in the present application is only relatively small, and the end face of the rotating seat bears the force caused by the impact of part of the grouting liquid, which is opposite to the pulling force transmitted by the rotating shaft. By adjusting the injection flow rate and pressure change of the grouting liquid, the rotating seat can be driven to perform irregular reciprocating motion in the fixed tube. At the same time, the rotating seat moves to the extreme position and contacts the internal step of the fixed tube to form an impact and form micro-vibration. The vibration is transmitted to the processing pipe to further evenly treat the grouting liquid and avoid blockage. In addition, the vibration is transmitted to the outside through the sleeve tube to promote the uniform filling of the grouting liquid in the soil layer structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of a grouting filling equipment for water-retaining mining in coal mines;

[0027] Figure 2 It is a filling schematic diagram of a grouting filling equipment for water-retaining mining in coal mines;

[0028] Figure 3 This is a schematic diagram of the structure of a grouting component of a grouting filling equipment for water-retaining mining in a coal mine;

[0029] Figure 4 A schematic diagram of a treatment pipe structure of a grouting filling equipment for water-retaining mining in a coal mine;

[0030] Figure 5 It is a schematic diagram of the rotating ring structure of a grouting filling equipment for water-retaining mining in coal mines;

[0031] Figure 6 This is a schematic diagram of the support component structure of a coal mine water conservation mining grouting filling equipment;

[0032] In the figure: 1. coordination component; 11. pressure gauge; 12. external interface; 2. drive pump; 3. flow meter; 4. transmission pipe; 5. control valve; 6. grouting component; 61. sleeve tube; 62. adapter; 63. grouting head; 631. slot; 64. treatment pipe; 641. sleeve tube; 642. connecting seat; 643. connecting hole; 65. rotating ring; 651. triangular support; 652. fixed through pipe; 653. driving gear; 66. support component; 661. fixed ring; 662. fixed tube; 663. rotating seat; 664. through hole; 7. soil layer structure; 71. thick and hard delamination; 711. delamination space; 72. fracture zone; 73. caving area; 74. topsoil layer. DETAILED DESCRIPTION

[0033] See also Figure 1-Figure 6 In an embodiment of the present application, a grouting filling device for water-retaining mining in a coal mine comprises:

[0034] The coordination component 1 includes a pressure gauge 11 and an external interface 12, and the pressure gauge 11 and the external interface 12 are connected through a transmission pipe 4;

[0035] The driving pump 2 is connected to a flow meter 3 at its output end, the inlet of the flow meter 3 is connected to the coordination component 1 through the transmission pipe 4, and the outlet of the flow meter 3 is connected to the grouting component 6 through the transmission pipe 4;

[0036] A control valve 5 is provided between the flow meter 3 and a grouting assembly 6, and the grouting assembly 6 is inserted into a soil layer structure 7;

[0037] The grouting assembly 6 includes: a sleeve tube 61, an adapter 62, a grouting head 63, a processing tube 64, a rotating ring 65 and a support assembly 66. The input end of the sleeve tube 61 is connected to the flow meter 3 through the transmission tube 4, and the output end of the sleeve tube 61 is connected to the adapter 62 and the grouting head 63 in sequence, and the processing tube 64 is also placed in the sleeve tube 61. The rotating ring 65 is arranged in the processing tube 64, and the support assembly 66 is arranged in the grouting head 63.

[0038] As a preferred embodiment, the external interface 12 is used to connect to a storage tank, and the storage tank stores the filling material output by the mixer.

[0039] As a preferred embodiment, the grouting head 63 is conical and a plurality of slots 631 are provided on the circumference of the outer wall of the grouting head 63 . In addition, both ends of the grouting head 63 are connected.

[0040] As a preferred embodiment, a sleeve 641 and a connecting seat 642 are sequentially provided at one end of the processing tube 64, a plurality of connecting holes 643 are evenly distributed on the wall of the processing tube 64, an end of the connecting seat 642 is fixedly sleeved in the adapter 62, and the connecting seat 642, the sleeve 641 and the grouting head 63 are internally connected.

[0041] As a preferred embodiment, a gap is left between the outer wall of the treatment tube 64 and the inner wall of the sleeve tube 61, and one end of the treatment tube 64 is exposed in the sleeve tube 61. The grouting liquid is transmitted through the sleeve tube 61, and is diverted into the interior of the treatment tube 64 and the gap between the treatment tube 64 and the sleeve tube 61, and is finally discharged through the grouting head 63. Specifically, during this period, the grouting liquid forms a mixed flow to promote mixing while avoiding retention and blockage.

[0042] As a preferred embodiment, the rotating ring 65 includes a triangular support 651 arranged in the center, and the side walls of the triangular support 651 are fixedly connected to the inner wall of the rotating ring 65 through a plurality of fixed through pipes 652, and a through hole and a groove strip-shaped groove for accommodating a clamping rotating shaft are opened at the center of the triangular support 651, and the fixed through pipe 652 is hollow to allow grouting liquid to flow through.

[0043] As a preferred embodiment, a plurality of driving teeth 653 are evenly distributed on the circumference of the outer wall of the rotating ring 65 , and the driving teeth 653 are arranged obliquely.

[0044] As a preferred embodiment, the rotating ring 65 is arranged in the sleeve tube 641, and the outer wall of the rotating ring 65 maintains a distance from the inner wall of the sleeve tube 641, the upper end of the rotating shaft is clamped with the triangular support 651, and the lower end is connected to the supporting assembly 66.

[0045] It should be explained that, during the flow of the grouting liquid, a reaction force is exerted on the driving teeth 653, driving the rotating ring 65 to deflect, so that the rotating ring 65 moves upstream.

[0046] As a preferred embodiment, the support assembly 66 includes a fixed ring 661, a fixed cylinder 662 and a rotating seat 663. The fixed ring 661 is fixed inside the grouting head 63, close to the tail end of the grouting head 63. The fixed cylinder 662 is clamped with the inner wall of the grouting head 63, and a rotating seat 663 is rotatably arranged inside the fixed cylinder 662. The rotating seat 663 is provided with a hollow groove to connect the rotating shaft. In addition, a plurality of through holes 664 are provided on the rotating seat 663 to allow the grouting liquid to pass through.

[0047] It needs to be explained that the through hole 664 is relatively small, and the end face of the rotating seat 663 bears part of the force brought by the impact of the grouting liquid, which is opposite to the pulling force transmitted by the rotating shaft. By adjusting the injection flow rate and pressure change of the grouting liquid, the rotating seat 663 can be driven to perform irregular reciprocating motion in the fixed tube 662. At the same time, the rotating seat 663 moves to the extreme position and contacts with the internal step of the fixed tube 662 to form an impact and micro-vibration. The vibration is transmitted to the processing tube 64 to further evenly treat the grouting liquid and avoid blockage. In addition, the vibration is transmitted outward through the sleeve tube 61 to promote the uniform filling of the grouting liquid in the soil layer structure 7.

[0048] A grouting filling process for water-retaining mining in a coal mine comprises the following steps:

[0049] Ⅰ. By statistically calculating the boreholes, the main key layer thick hard separation layer 71 is selected as the separation layer grouting layer, and the contour map of the topsoil layer 74, the fracture zone 72, the caving area 73 and the thick hard separation layer 71 is drawn, and grouting is performed in the separation layer space 711;

[0050] II. Control the stability of the upper aquifer based on stratified mining and limited mining width according to the mining geology and overburden characteristics of different regions;

[0051] III. Crush the gangue to a certain particle size and add water to make a filling slurry, which is then injected into the gaps and cracks of the overburden rock by using a driving pump 2 and a transmission pipe 4;

[0052] IV. Grouting is performed at the determined grouting points. During the grouting process, the pressure gauge 11 and the flow meter 3 are used to monitor the grouting pressure and flow rate to ensure that the slurry can fully fill the predetermined area to achieve the waterproofing and reinforcement effects.

[0053] What has been described above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and application concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A grouting filling equipment for water-retaining mining in coal mines, characterized in that: include: A coordination component (1) includes a pressure gauge (11) and an external interface (12), wherein the pressure gauge (11) and the external interface (12) are connected via a transmission pipe (4); A driving pump (2) is provided with a flow meter (3) at its output end, the inlet of the flow meter (3) is connected to the coordination component (1) through a transmission pipe (4), and the outlet of the flow meter (3) is connected to the grouting component (6) through the transmission pipe (4); A control valve (5) is arranged between the flow meter (3) and the grouting assembly (6), and the grouting assembly (6) is inserted into the soil layer structure (7); The grouting assembly (6) comprises a sleeve tube (61), an adapter (62), a grouting head (63), a processing tube (64), a rotating ring (65) and a support assembly (66); the input end of the sleeve tube (61) is connected to the flow meter (3) via a transmission tube (4), and the output end of the sleeve tube (61) is connected to the adapter (62) and the grouting head (63) in sequence; the processing tube (64) is also arranged in the sleeve tube (61), the rotating ring (65) is arranged in the processing tube (64), and the support assembly (66) is arranged in the grouting head (63); The rotating ring (65) comprises a triangular support (651) arranged at the center, and the side wall of the triangular support (651) is fixedly connected to the inner wall of the rotating ring (65) through a plurality of fixed through pipes (652), and a through hole and a groove strip-shaped groove for accommodating a clamping rotating shaft are opened at the center of the triangular support (651), and the fixed through pipe (652) is hollow to allow grouting liquid to flow through; A plurality of driving teeth (653) are evenly distributed on the circumference of the outer wall of the rotating ring (65), and the driving teeth (653) are arranged obliquely; The rotating ring (65) is arranged in the sleeve tube (641), and the outer wall of the rotating ring (65) maintains a distance from the inner wall of the sleeve tube (641); the upper end of the rotating shaft is clamped with a triangular support (651), and the lower end is connected to a support assembly (66); The support assembly (66) comprises a fixed ring (661), a fixed cylinder (662) and a rotating seat (663); the fixed ring (661) is fixed inside the grouting head (63) near the rear end of the grouting head (63); the fixed cylinder (662) is clamped with the inner wall of the grouting head (63); and a rotating seat (663) is rotatably arranged inside the fixed cylinder (662); the rotating seat (663) is provided with a hollow groove for connecting the rotating shaft; and a plurality of through holes (664) are provided on the rotating seat (663) to allow the grouting liquid to pass through; The end surface of the rotating seat (663) bears the force caused by the impact of part of the grouting liquid, which is opposite to the pulling force transmitted by the rotating shaft. By adjusting the injection flow rate and pressure change of the grouting liquid, the rotating seat (663) can be driven to perform irregular reciprocating motion in the fixed cylinder (662). At the same time, the rotating seat (663) moves to the extreme position and contacts the internal step of the fixed cylinder (662) to form an impact and form micro vibration.

2. A grouting filling equipment for water-retaining mining in coal mines according to claim 1, characterized in that: The external interface (12) is used to connect to a storage tank, and the storage tank stores the filling material output by the mixer.

3. The grouting filling equipment for water-retaining mining in coal mines according to claim 1 is characterized in that: The grouting head (63) is conical and a plurality of slots (631) are provided on the circumference of the outer wall of the grouting head (63). In addition, both ends of the grouting head (63) are connected.

4. The grouting filling equipment for water-retaining mining in coal mines according to claim 1 is characterized in that: A sleeve tube (641) and a connecting seat (642) are sequentially arranged at one end of the processing tube (64); a plurality of connecting holes (643) are evenly distributed on the wall of the processing tube (64); an end of the connecting seat (642) is fixedly sleeved in the adapter (62); and the connecting seat (642), the sleeve tube (641) and the grouting head (63) are internally connected.

5. The grouting filling equipment for water-retaining mining in coal mines according to claim 4 is characterized in that: A gap is left between the outer wall of the treatment tube (64) and the inner wall of the sleeve tube (61), and one end of the treatment tube (64) is exposed inside the sleeve tube (61). The grouting liquid is transmitted through the sleeve tube (61), divided into the interior of the treatment tube (64) and the gap between the treatment tube (64) and the sleeve tube (61), and finally discharged through the grouting head (63).

6. A coal mine water conservation mining grouting filling process, which uses a coal mine water conservation mining grouting filling equipment as claimed in any one of claims 1 to 5, characterized in that: The steps include: Ⅰ. By statistically calculating the boreholes, the thick hard separation layer (71) of the main key layer is selected as the separation layer grouting layer, and contour maps of the topsoil layer (74), the fracture zone (72), the caving zone (73) and the thick hard separation layer (71) are drawn, and grouting is performed in the separation layer space (711); II. Control the stability of the upper aquifer based on stratified mining and limited mining width according to the mining geology and overburden characteristics of different regions; III. Crushing the gangue to a certain particle size and adding water to form a filling slurry, which is then injected into the gaps and cracks of the overburden rock using a driving pump (2) and a transmission pipe (4); IV. Grouting is performed at the determined grouting points. During the grouting process, the grouting pressure and flow rate are monitored by the pressure gauge (11) and the flow meter (3) to ensure that the grout can fully fill the predetermined area to achieve the effect of waterproofing and reinforcement.

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