Grouting filling method, device and system based on ground fractured well

Abstract

The invention relates to a grouting filling method, device and system based on a ground fractured well. The method comprises the steps that after fracturing operation on a target weakening area corresponding to a goaf is completed, the target plugging position of a ground fracturing well corresponding to the goaf is determined; the plugging device is controlled to plug the casing pipe corresponding to the target plugging position, and a first containing space of the ground fractured well is obtained; the trepanning equipment is controlled to perform trepanning treatment on the sleeve at the end, close to the goaf, in the first containing space, and a plurality of grout outlet holes are obtained; and a grouting pump is controlled to inject grout into the end, away from the goaf, of the first containing space, so that the grout penetrates through the multiple grout outlet holes along the containing space to be injected into the second containing space. According to the scheme, the utilization rate of the ground fractured well is effectively increased.

Description

Technical Field

[0001] The present disclosure relates to the technical field of coal mining, and in particular to a grouting filling method, device and system based on a ground fracturing well. Background Art

[0002] In related technologies, there are generally multiple layers of extremely thick and hard roof above the coal seams in mines. The high strength and complete structure of the roof lead to the formation of a suspended roof in the low-lying roof of the goaf, which causes stress concentration and easily triggers rock burst. Currently, ground regional fracturing technology is widely used to treat the weakening of the hard roof. This involves setting up a ground fracturing well consisting of a vertical section, a bevel section, and a horizontal section, injecting fracturing fluid into the horizontal section of the ground fracturing well, and then using the fracturing fluid in the horizontal section to perform the fracturing operation to achieve the weakening of the hard roof. However, after the fracturing operation is completed, the vertical section and the bevel section become idle, with low utilization, resulting in a waste of resources. Summary of the Invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a grouting filling method, device and system based on a ground fracturing well.

[0004] According to a first aspect of an embodiment of the present disclosure, a grouting filling method for a ground fracturing well is provided, comprising:

[0005] After completing the fracturing operation on the target weakened area corresponding to the goaf, determining the target plugging position of the surface fracturing well corresponding to the goaf; a casing is fixed inside the surface fracturing well for preventing the loss of fracturing fluid;

[0006] Controlling the plugging device to plug the casing corresponding to the target plugging position to obtain a first accommodation space of the surface fracturing well;

[0007] Controlling the drilling device to drill a hole in the casing near one end of the goaf in the first accommodating space to obtain a plurality of slurry outlet holes;

[0008] Control the grouting pump to inject slurry into one end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through the multiple slurry outlet holes; the second accommodation space is an abscission space or a goaf; the second accommodation space corresponds to the target plugging position.

[0009] In some embodiments of the present disclosure, the surface fracturing well includes a vertical section, a deflection section, and a horizontal section; and determining a target plugging position of the surface fracturing well corresponding to the goaf includes:

[0010] Get the current grouting filling task;

[0011] In a case where the current grouting filling task is separation grouting, determining the target plugging position as a connection point between the vertical section and the deflecting section;

[0012] The first accommodating space includes the vertical section, and the control opening device performs opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including:

[0013] The drilling device is controlled to perform drilling processing on the casing in the vertical section close to one end of the goaf to obtain multiple slurry outlet holes.

[0014] In some embodiments of the present disclosure, the surface fracturing well includes a vertical section, a deflection section, and a horizontal section; and determining a target plugging position of the surface fracturing well corresponding to the goaf includes:

[0015] Get the current grouting filling task;

[0016] In a case where the current grouting filling task is goaf filling, determining the target plugging position as a connection point between the deflecting section and the horizontal section;

[0017] The first accommodating space includes the vertical section and the deflecting section. The controlled opening device performs opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including:

[0018] The drilling device is controlled to perform drilling processing on the casing in the vertical section close to one end of the goaf to obtain multiple slurry outlet holes.

[0019] In some embodiments of the present disclosure, the surface fracturing well includes a vertical section, a deflection section, and a horizontal section; and determining a target plugging position of the surface fracturing well corresponding to the goaf includes:

[0020] Get the current grouting filling task;

[0021] In a case where the current grouting and filling task is separation layer grouting and goaf filling, determining that the target plugging position includes a connection point between the deflecting section and the horizontal section, and a connection point between the vertical section and the deflecting section;

[0022] The first accommodating space includes the vertical section and the deflecting section. The controlled opening device performs opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including:

[0023] Controlling the drilling device to drill a hole in the casing near one end of the goaf in the deflection section to obtain a plurality of slurry outlet holes;

[0024] The controlling of the grouting pump to inject slurry into an end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through the plurality of slurry outlet holes, comprising:

[0025] Controlling the grouting pump to inject slurry into one end of the first accommodating space away from the goaf, so that the slurry is injected into the goaf along the accommodating space through the plurality of slurry outlet holes;

[0026] After controlling the grouting pump to inject slurry into the end of the first accommodating space away from the goaf so that the slurry is injected into the second accommodating space along the accommodating space through the multiple slurry outlet holes, the method further includes:

[0027] Controlling the blocking device to block the connection point between the vertical section and the deflecting section to obtain a third accommodating space connected to the grouting pump; the third accommodating space includes the vertical section;

[0028] Performing a hole processing on the casing in the vertical section near one end of the goaf to obtain a plurality of slurry outlet holes;

[0029] The grouting pump is controlled to inject slurry into one end of the vertical section away from the goaf, so that the slurry is injected into the separation space along the vertical section through multiple slurry outlet holes.

[0030] In some embodiments of the present disclosure, the controlled opening device performs opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including:

[0031] Based on the equivalent model of the surface fracturing well and the equivalent sub-model of the slurry holes, a plurality of slurry hole layout results are generated; the slurry hole layout results include size and distribution information of the slurry holes;

[0032] Iteratively optimizing the multiple slurry outlet hole layout results using a genetic algorithm to obtain a target slurry outlet hole layout result that meets preset conditions;

[0033] According to the target slurry outlet hole layout result, the hole-opening device is controlled to perform hole-opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes.

[0034] In some embodiments of the present disclosure, before determining the target blocking position as the connection point between the vertical section and the deflecting section, the method further includes:

[0035] Obtaining the coal seam mining height and the fracture expansion coefficient of the fractured rock layer corresponding to the goaf;

[0036] Determine the direct roof collapse range corresponding to the goaf based on the coal seam mining height and the fracture expansion coefficient of the fractured rock layer;

[0037] Correcting the target blocking position based on the direct roof collapse range to obtain a corrected target blocking position;

[0038] The controlling and plugging device plugs the casing corresponding to the target plugging position to obtain the first accommodation space of the surface fracturing well, including:

[0039] The plugging device is controlled to plug the casing corresponding to the corrected target plugging position to obtain a first accommodation space of the surface fracturing well.

[0040] According to a second aspect of an embodiment of the present disclosure, a grouting filling device based on a ground fracturing well is provided, comprising:

[0041] a determination unit, configured to determine a target plugging position of a surface fracturing well corresponding to the goaf after completing a fracturing operation on a target weakened area corresponding to the goaf; wherein a casing is fixed inside the surface fracturing well for preventing loss of fracturing fluid;

[0042] a plugging unit, configured to control a plugging device to plug the casing corresponding to the target plugging position, thereby obtaining a first accommodation space of the surface fracturing well;

[0043] a hole-drilling unit, configured to control a hole-drilling device to drill a casing near one end of the goaf in the first accommodating space to obtain a plurality of slurry outlet holes;

[0044] The grouting filling unit is used to control the grouting pump to inject slurry into the end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through the multiple slurry outlet holes; the second accommodation space is an abscission space or a goaf; the second accommodation space corresponds to the target sealing position.

[0045] According to a third aspect of an embodiment of the present disclosure, an electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method described in any one of the first aspects is implemented.

[0046] According to a fourth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method according to any one of the first aspects is implemented.

[0047] According to a fifth aspect of an embodiment of the present disclosure, a computer program product is provided, comprising a computer program, wherein the computer program implements the method as described in any one of the first aspects when executed by a processor.

[0048] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: after completing the fracturing operation on the target weakened area corresponding to the goaf, determining the target plugging position of the ground fracturing well corresponding to the goaf; controlling the plugging equipment to plug the casing corresponding to the target plugging position to obtain a first accommodation space of the ground fracturing well; controlling the drilling equipment to drill holes in the casing near one end of the goaf in the first accommodation space to obtain multiple slurry holes; controlling the grouting pump to inject slurry into the end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through the multiple slurry holes. Therefore, after completing the weakening treatment of the target area through the ground fracturing well, the fracturing well can continue to be used for grouting the stratum space and filling the goaf, effectively improving the utilization rate of the ground fracturing well, and no additional corresponding drilling holes are required for grouting the stratum space and filling the goaf, thereby improving the efficiency of grouting the stratum space and filling the goaf.

[0049] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0051] Figure 1 The present invention is a flow chart showing a grouting filling method for a surface fracturing well according to an exemplary embodiment.

[0052] Figure 2 This is a schematic diagram of the ground horizontal well fracturing technology before working face recovery proposed in an embodiment of the present application.

[0053] Figure 3 This is a schematic diagram of the ground horizontal well fracturing technology after the working face is recovered proposed in the embodiment of this application.

[0054] Figure 4 It is a schematic cross-sectional diagram of the top plate delamination tendency treated by ground grouting proposed in an embodiment of the present application.

[0055] Figure 5 It is a cross-sectional schematic diagram of the ground grouting treatment of the goaf proposed in the embodiment of the present application.

[0056] Figure 6 The figure is a block diagram showing a grouting filling device based on a ground fracturing well according to an exemplary embodiment.

[0057] Figure 7 The present invention is a block diagram showing an apparatus for a grouting filling method based on a ground fracturing well according to an exemplary embodiment. DETAILED DESCRIPTION

[0058] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0059] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "an" and "the" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0060] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0061] Furthermore, the various forms of processes shown in the embodiments of this disclosure may be used to reorder, add, or delete steps. For example, the steps described in this application may be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved. This is not a limitation herein.

[0062] It should be noted that traditional surface horizontal well fracturing technology can include the following processes:

[0063] Drilling technology: Figure 2 As shown, a combination of technologies such as logging while drilling and comprehensive mud logging is used to control the drilling trajectory. Casings of different diameters are lowered above the coal seam to a certain depth, and cement is filled in the annular space between the casing and the wellbore to form a solid fracturing wellbore, isolating oil, gas, water and other broken formations.

[0064] Fracturing process: Figure 3As shown in the figure, a perforator is used to penetrate the casing and cement sheath, connecting the fractured rock formation with the wellbore, providing a smooth channel for the pressure pump to press the fracturing fluid into the formation through the wellhead assembly. After perforating, the fracturing tool string is sent to the horizontal section at the bottom of the well, and the packer is activated and set. Through large-scale fracturing operations, the target rock formation is cut to the maximum extent, creating a complex fracture network.

[0065] Construction Equipment: Optimize the wellhead and blowout preventer based on the selected staged fracturing process, construction pressure, fracturing construction parameters, and casing conditions. Strength verification requires that the rated operating pressure be no less than 1.25 times the pressure limit, ultimately determining the equipment model and technical parameters. Based on the optimized design construction parameters and pressure limit, calculate the water horsepower required for fracturing construction. The water injection horsepower of the fracturing pump should be no less than 1.2 times the design water horsepower. Determine the model and quantity of the fracturing construction pump trucks, the model and technical parameters of the sand mixer trucks, and the model, quantity, and technical parameters of other auxiliary equipment.

[0066] Ground horizontal well fracturing technology is usually constructed before the working face is mined. When the working face is mined, a goaf is formed and a roof separation space is formed above the coal seam. At this time, the horizontal section of the ground fracturing well cannot be used due to the influence of roof sinking, while the vertical section of the ground fracturing well can be used as a ground grouting well for roof separation grouting construction.

[0067] In addition, if Figure 4 As shown in the figure, the traditional separation layer grouting filling is to use the separation layer space formed during the destruction of the working face roof overburden, drill the ground to the available separation layer space, and inject grouting into the separation layer space through the drill hole to make it available. Figure 4 Separation grouting is performed in the vertical section of a horizontal well fracturing operation. Traditional separation grouting procedures include: selecting the grouting hole location and determining the grouting well depth; selecting and matching grouting station equipment; drilling and cementing the grouting well; grouting station system; grouting materials and concentration; and monitoring grouting results.

[0068] In related technologies, there are usually multiple layers of thick and hard roof above the coal seams in rock burst mines. The high strength and complete structure of the roof lead to the formation of a suspended roof in the low-lying roof of the goaf, which causes stress concentration and easily triggers rock burst. At present, ground regional fracturing technology is widely used to treat the weakening of the hard roof. That is, a ground fracturing well including a vertical section, a bevel section and a horizontal section is set up, and the fracturing fluid is injected into the horizontal section of the ground fracturing well. Then, the fracturing fluid in the horizontal section is used to perform the fracturing operation to achieve the weakening of the hard roof. However, after the fracturing operation is completed, the vertical section and the bevel section become idle, with low utilization rate, resulting in waste of resources.

[0069] In order to solve the above problems, the present disclosure provides a grouting and filling method, device and system based on a ground fracturing well, which determines the target plugging position of the ground fracturing well corresponding to the goaf after completing the fracturing operation on the target weakened area corresponding to the goaf; controls the plugging equipment to plug the casing corresponding to the target plugging position to obtain a first accommodation space of the ground fracturing well; controls the drilling equipment to drill holes in the casing near one end of the goaf in the first accommodation space to obtain multiple slurry holes; controls the grouting pump to inject slurry into the end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through the multiple slurry holes. Therefore, after completing the weakening treatment of the target area through the ground fracturing well, the fracturing well can continue to be used for grouting the stratum space and filling the goaf, effectively improving the utilization rate of the ground fracturing well, and there is no need to set up corresponding drill holes for grouting the stratum space and filling the goaf, thereby improving the efficiency of grouting the stratum space and filling the goaf.

[0070] Figure 1 FIG. 1 is a flow chart showing a grouting filling method based on a ground fracturing well according to an exemplary embodiment. Figure 1 As shown, it should be noted that the grouting filling method based on the ground fracturing well of the embodiment of the present disclosure is applied to the grouting filling device based on the ground fracturing well. Figure 1 As shown, the method may include the following steps:

[0071] Step 101: After completing the fracturing operation on the target weakened area corresponding to the goaf, determine the target plugging position of the surface fracturing well corresponding to the goaf.

[0072] Among them, a casing is fixed inside the ground fracturing well to prevent the loss of fracturing fluid.

[0073] It is understandable that if Figure 2 As shown, a ground fracturing well includes a vertical section, a deflection section, and a horizontal section. Fracturing fluid needs to be injected from the ground into the horizontal section for fracturing operations.

[0074] Therefore, in an embodiment of the present application, after completing the fracturing operation on the target weakened area corresponding to the goaf, in order to continue to use the vertical section and the inclined section for grouting filling operations, it is necessary to seal the unusable part to avoid affecting the subsequent reuse of the ground fracturing well.

[0075] In one embodiment, the target plugging position can be determined based on the actual location of the area where grouting filling is required.

[0076] Step 102: Control the plugging equipment to plug the casing corresponding to the target plugging position to obtain a first accommodation space of the surface fracturing well.

[0077] As an example, the above-mentioned blocking device may adopt a conventional blocking device, which will not be described in detail here.

[0078] In one embodiment, the first accommodating space may be the space inside the surface fracturing well that is connected to the ground after the casing is sealed, that is, the space that can continue to be used.

[0079] Step 103: Control the drilling equipment to drill holes in the casing near one end of the goaf in the first accommodating space to obtain a plurality of slurry outlet holes.

[0080] In one embodiment, since a casing is provided inside the first accommodating space, and the first accommodating space is obtained after the target sealing position is sealed, in order to be able to continue to use the first accommodating space to perform subsequent grouting operations, it is necessary to perform a hole treatment on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, so that the slurry can be injected into the target position through the slurry outlet.

[0081] In some embodiments of the present application, step 103 may specifically include the following steps:

[0082] Based on the equivalent model of the surface fracturing well and the equivalent sub-model of the slurry hole, a variety of slurry hole layout results are generated; the slurry hole layout results include the size and distribution information of the slurry holes;

[0083] Genetic algorithms are used to iteratively optimize various slurry outlet hole layout results to obtain the target slurry outlet hole layout result that meets the preset conditions;

[0084] According to the target slurry outlet hole layout result, the hole-opening device is controlled to perform hole-opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes.

[0085] In the embodiment of the present application, in order to improve the grouting efficiency, the size and distribution of the grouting holes can be planned in advance, and the grouting holes can be cut according to the planning results.

[0086] In one embodiment, an equivalent model can be constructed according to the actual size of the ground fracturing well, the equivalent model includes an equivalent sub-model of the slurry hole, and a plurality of slurry hole layout results including a plurality of slurry holes are set as the initial population. The initial plurality of slurry hole layout results are iteratively optimized using a genetic algorithm until the number of iterations exceeds a preset threshold or a slurry hole layout result with a total slurry hole area greater than a preset area exists. The iteration is stopped, and the slurry hole layout result with the largest total slurry hole area is used as the target slurry hole layout result.

[0087] Step 104: Control the grouting pump to inject slurry into one end of the first accommodating space away from the goaf, so that the slurry passes through the plurality of slurry outlet holes along the accommodating space and is injected into the second accommodating space.

[0088] The second accommodating space is a separated layer space or a goaf; the second accommodating space corresponds to the target blocking position.

[0089] In one embodiment, the input end of the grouting pump is connected to the slurry source, and the grouting pump transports the slurry along the first accommodating space to the well, and injects the slurry into the second accommodating space along the slurry outlet hole.

[0090] It can be understood that the position of the second accommodating space corresponds to the target blocking position, that is, the target blocking position is the end of the first accommodating space, and the slurry flowing out of the slurry outlet hole at the end of the first accommodating space can flow into the second accommodating space.

[0091] In some embodiments of the present application, a surface fracturing well includes a vertical section, a deflection section, and a horizontal section; determining a target plugging position of the surface fracturing well corresponding to a goaf includes:

[0092] Get the current grouting filling task;

[0093] When the current grouting filling task is separation grouting, the target plugging position is determined to be the connection point between the vertical section and the deflecting section;

[0094] The first accommodating space includes a vertical section. The drilling device is controlled to drill a casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including:

[0095] The drilling equipment is controlled to drill holes in the casing near one end of the goaf in the vertical section to obtain multiple slurry outlet holes.

[0096] It should be noted that if Figure 4 As shown in the figure, after mining a portion of the coal seam, a separation space is usually formed above the goaf, which needs to be filled. The separation space is usually a certain distance away from the goaf and its position corresponds to the vertical section.

[0097] In one embodiment, if the current grouting task is solely for grouting the delamination space formed after coal mining, the connection between the vertical section and the deflection section can be used as the target blocking location, thereby blocking the upper end of the deflection section and using the vertical section to grout the delamination space. This allows the vertical section to be reused as a grouting well.

[0098] In some embodiments of the present application, before determining the target blocking position as the connection point between the vertical section and the deflecting section, the method further includes:

[0099] Obtain the mining height of the coal seam and the expansion coefficient of the fractured rock layer corresponding to the goaf;

[0100] Determine the direct roof collapse range corresponding to the goaf based on the coal seam mining height and the fracture expansion coefficient of the fractured rock layer;

[0101] The target blocking position is corrected based on the direct roof collapse range to obtain the corrected target blocking position;

[0102] Controlling the plugging equipment to plug the casing corresponding to the target plugging position to obtain a first accommodation space of the surface fracturing well includes:

[0103] The plugging equipment is controlled to plug the casing corresponding to the corrected target plugging position, thereby obtaining a first accommodation space for the surface fracturing well.

[0104] In one embodiment, the following formula can be used to calculate the direct roof collapse range H corresponding to the goaf: z :

[0105] H z =h / (K-1)

[0106] Among them, H is the thickness of the immediate roof (2 to 3 times the mining height), h is the mining height of the coal seam, and K is the coefficient of expansion of the fractured rock layer (sandstone with high strength and well-developed joints and fissures is generally 1.3 to 1.35; general rock layers with relatively low strength such as siltstone are generally 1.25 to 1.28); J Range, the basic top range is about 5 to 6 times the mining height, that is, H J =(5~6)h. The position of the basic top is as follows Figure 5 shown.

[0107] In one embodiment, in order to ensure that the slurry can be injected into the delamination space or goaf, it is necessary to first determine the direct top collapse range of the roof, so that the initial target blocking position can be determined based on the above collapse range for blocking. Then, whether the slurry flowing out from the end of the first accommodation space can be injected into the second accommodation space. If it cannot be injected, the target blocking position can be appropriately adjusted according to the collapse range.

[0108] In other embodiments of the present application, a surface fracturing well includes a vertical section, a deflection section, and a horizontal section; determining a target plugging position of the surface fracturing well corresponding to a goaf includes:

[0109] Get the current grouting filling task;

[0110] When the current grouting filling task is to fill the goaf, the target plugging position is determined to be the connection point between the deflection section and the horizontal section;

[0111] The first accommodating space includes a vertical section and a deflecting section. The drilling equipment is controlled to drill holes in the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including:

[0112] The drilling equipment is controlled to drill holes in the casing near one end of the goaf in the vertical section to obtain multiple slurry outlet holes.

[0113] It should be noted that if Figure 5 As shown, after mining a portion of the coal seam, the goaf needs to be filled. In addition, since the filling of the goaf in this application is performed after the fracturing operation of the target weakened area (located above the goaf), cracks are formed in the target weakened area after being fractured, that is, cracks are formed in the direct roof between the horizontal section and the goaf. Therefore, the slurry can be output by the deflection section and the vertical section, and the slurry penetrates into the goaf along the cracks in the direct roof, thereby filling the goaf.

[0114] In one embodiment, when the current grouting filling task is only delamination grouting, that is, grouting to fill the delamination space formed after coal mining, the connection between the vertical section and the inclined section can be used as the target blocking position, thereby blocking the upper end of the inclined section and using the vertical section to grout the delamination space.

[0115] In some other embodiments of the present application, a surface fracturing well includes a vertical section, a deflection section, and a horizontal section; determining a target plugging position of the surface fracturing well corresponding to a goaf includes:

[0116] Get the current grouting filling task;

[0117] When the current grouting and filling task is separation grouting and goaf filling, the target plugging position includes the connection point between the deflection section and the horizontal section, and the connection point between the vertical section and the deflection section;

[0118] The first accommodating space includes a vertical section and a deflecting section. The drilling equipment is controlled to drill holes in the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including:

[0119] Control the drilling equipment to drill holes in the casing near one end of the goaf in the deflection section to obtain multiple slurry outlet holes;

[0120] Controlling the grouting pump to inject slurry into one end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space through the plurality of slurry outlet holes along the accommodation space, including:

[0121] Controlling the grouting pump to inject slurry into one end of the first accommodation space away from the goaf, so that the slurry is injected into the goaf along the accommodation space through the plurality of slurry outlet holes;

[0122] After controlling the grouting pump to inject slurry into an end of the first accommodation space away from the goaf so that the slurry is injected into the second accommodation space through the plurality of slurry outlet holes along the accommodation space, the method further includes:

[0123] Controlling the plugging device to plug the connection point between the vertical section and the deflecting section to obtain a third accommodating space connected to the grouting pump; the third accommodating space includes the vertical section;

[0124] The casing near one end of the goaf in the vertical section is opened to obtain multiple slurry outlet holes;

[0125] The grouting pump is controlled to inject the slurry into the end of the vertical section away from the goaf, so that the slurry passes through multiple slurry outlet holes along the vertical section and is injected into the separation space.

[0126] In the embodiment of the present application, the vertical section alone can be used to grout the delamination space, the vertical section and the inclined section can be used to fill the goaf, or the goaf can be filled first, the inclined section can be sealed, and then the vertical section can be used to grout the delamination space, thereby achieving full utilization of the ground fracturing well.

[0127] According to the grouting and filling method based on the ground fracturing well proposed in the embodiment of the present disclosure, after completing the fracturing operation on the target weakened area corresponding to the goaf, the target plugging position of the ground fracturing well corresponding to the goaf is determined; the plugging equipment is controlled to plug the casing corresponding to the target plugging position to obtain the first accommodation space of the ground fracturing well; the drilling equipment is controlled to drill holes in the casing near one end of the goaf in the first accommodation space to obtain multiple slurry holes; the grouting pump is controlled to inject slurry into the end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through the multiple slurry holes. Therefore, after completing the weakening treatment of the target area through the ground fracturing well, the fracturing well can continue to be used for grouting the stratum space and filling the goaf, effectively improving the utilization rate of the ground fracturing well, and there is no need to set up corresponding drill holes for grouting the stratum space and filling the goaf, thereby improving the efficiency of grouting the stratum space and filling the goaf.

[0128] Figure 6 This is a block diagram of a grouting filling device based on a ground fracturing well according to an exemplary embodiment. Figure 6 The device includes a determination unit 601, a plugging unit 602, a hole opening unit 603 and a grouting filling unit 604.

[0129] The determining unit 601 is configured to determine a target plugging position of a surface fracturing well corresponding to the goaf after completing the fracturing operation on the target weakened area corresponding to the goaf; a casing is fixed inside the surface fracturing well to prevent the loss of fracturing fluid;

[0130] The plugging unit 602 is used to control the plugging equipment to plug the casing corresponding to the target plugging position to obtain a first accommodation space of the surface fracturing well;

[0131] The hole-drilling unit 603 is used to control the hole-drilling device to perform hole-drilling processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes;

[0132] The grouting filling unit 604 is used to control the grouting pump to inject slurry into one end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through multiple slurry outlet holes; the second accommodation space is the delamination space or the goaf; the second accommodation space corresponds to the target sealing position.

[0133] In the embodiment of the present application, the surface fracturing well includes a vertical section, a deflection section, and a horizontal section. The determining unit 601 can be specifically used to: obtain a current grouting filling task; when the current grouting filling task is separation grouting, determine the target plugging position as the connection point between the vertical section and the deflection section;

[0134] The hole-opening unit 603 can be specifically used to control the hole-opening equipment to perform hole-opening processing on the casing near one end of the goaf in the vertical section to obtain multiple slurry outlet holes.

[0135] In the embodiment of the present application, the surface fracturing well includes a vertical section, a deflection section, and a horizontal section. The determining unit 601 can be specifically used to: obtain a current grouting filling task; when the current grouting filling task is goaf filling, determine the target plugging position as the connection point between the deflection section and the horizontal section;

[0136] The hole-drilling unit 603 can be specifically used to control the hole-drilling equipment to perform hole-drilling processing on the casing near one end of the goaf in the vertical section to obtain multiple slurry outlet holes.

[0137] In the embodiment of the present application, the surface fracturing well includes a vertical section, a deflection section, and a horizontal section; the opening unit 603 can be specifically used to: obtain a current grouting and filling task; when the current grouting and filling task is separation grouting and goaf filling, determine the target plugging position including the connection point between the deflection section and the horizontal section, and the connection point between the vertical section and the deflection section;

[0138] The hole-drilling unit 603 can be specifically used to: control the hole-drilling device to drill holes in the casing near one end of the goaf in the deflection section to obtain multiple slurry outlet holes;

[0139] The grouting filling unit 604 may be specifically configured to: control the grouting pump to inject slurry into one end of the first accommodation space away from the goaf, so that the slurry is injected into the goaf along the accommodation space through the plurality of slurry outlet holes;

[0140] The apparatus may further comprise:

[0141] A control unit, configured to control the plugging device to plug the connection point between the vertical section and the deflecting section, thereby obtaining a third accommodating space connected to the grouting pump; the third accommodating space includes the vertical section;

[0142] A processing unit is used to perform a hole processing on the casing near one end of the goaf in the vertical section to obtain multiple slurry outlet holes;

[0143] The control unit is also used to control the grouting pump to inject slurry into the end of the vertical section away from the goaf, so that the slurry is injected into the separation space along the vertical section through multiple slurry outlet holes.

[0144] In the embodiment of the present application, the opening unit 603 can be specifically used for:

[0145] Based on the equivalent model of the surface fracturing well and the equivalent sub-model of the slurry hole, a variety of slurry hole layout results are generated; the slurry hole layout results include the size and distribution information of the slurry holes;

[0146] Genetic algorithms are used to iteratively optimize various slurry outlet hole layout results to obtain the target slurry outlet hole layout result that meets the preset conditions;

[0147] According to the target slurry outlet hole layout result, the hole-opening device is controlled to perform hole-opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes.

[0148] In the embodiment of the present application, the determining unit 601 may further be used to:

[0149] Obtain the mining height of the coal seam and the expansion coefficient of the fractured rock layer corresponding to the goaf;

[0150] Determine the direct roof collapse range corresponding to the goaf based on the coal seam mining height and the fracture expansion coefficient of the fractured rock layer;

[0151] The target blocking position is corrected based on the direct roof collapse range to obtain the corrected target blocking position;

[0152] The plugging unit 601 can be specifically used to control the plugging equipment to plug the casing corresponding to the corrected target plugging position to obtain the first accommodation space of the surface fracturing well.

[0153] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0154] According to the grouting and filling device based on the ground fracturing well proposed in the embodiment of the present disclosure, after completing the fracturing operation on the target weakened area corresponding to the goaf, the target plugging position of the ground fracturing well corresponding to the goaf is determined; the plugging device is controlled to plug the casing corresponding to the target plugging position to obtain the first accommodation space of the ground fracturing well; the hole-opening device is controlled to perform hole-opening treatment on the casing near one end of the goaf in the first accommodation space to obtain multiple slurry holes; the grouting pump is controlled to inject slurry into the end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through the multiple slurry holes. Therefore, after completing the weakening treatment of the target area through the ground fracturing well, the fracturing well can continue to be used for grouting the stratum space and filling the goaf, effectively improving the utilization rate of the ground fracturing well, and there is no need to set up corresponding drill holes for grouting the stratum space and filling the goaf, thereby improving the efficiency of grouting the stratum space and filling the goaf.

[0155] Figure 7 7 is a block diagram illustrating an apparatus for a grouting method for a surface fractured well according to an exemplary embodiment. For example, apparatus 700 may be an electronic device, such as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, or the like.

[0156] Reference Figure 7 , apparatus 700 may include one or more of the following components: a processing component 702 , a memory 704 , a power component 706 , a multimedia component 708 , an audio component 710 , an input / output (I / O) interface 712 , a sensor component 714 , and a communication component 716 .

[0157] The processing component 702 generally controls the overall operation of the device 700, such as operations associated with display, phone calls, data communications, camera operation, and recording operations. The processing component 702 may include one or more processors 720 to execute instructions to perform all or part of the steps of the above-described method. In addition, the processing component 702 may include one or more modules to facilitate interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate interaction between the multimedia component 708 and the processing component 702.

[0158] The memory 704 is configured to store various types of data to support operations on the device 700. Examples of such data include instructions for any application or method operating on the device 700, contact data, phone book data, messages, pictures, videos, etc. The memory 704 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0159] The power component 706 provides power to the various components of the device 700. The power component 706 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device 700.

[0160] The multimedia component 708 includes a screen that provides an output interface between the device 700 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, slides, and gestures on the touch panel. The touch sensor can not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 708 includes a front camera and / or a rear camera. When the device 700 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0161] The audio component 710 is configured to output and / or input audio signals. For example, the audio component 710 includes a microphone (MIC), which is configured to receive external audio signals when the device 700 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 704 or transmitted via the communication component 716. In some embodiments, the audio component 710 also includes a speaker for outputting audio signals.

[0162] I / O interface 712 provides an interface between processing component 702 and peripheral interface modules, such as a keyboard, click wheel, buttons, etc. These buttons may include but are not limited to: a home button, volume buttons, a start button, and a lock button.

[0163] The sensor assembly 714 includes one or more sensors for providing various aspects of the status assessment of the device 700. For example, the sensor assembly 714 can detect the open / closed state of the device 700, the relative positioning of components, such as the display and keypad of the device 700. The sensor assembly 714 can also detect changes in the position of the device 700 or a component of the device 700, the presence or absence of user contact with the device 700, the orientation or acceleration / deceleration of the device 700, and temperature changes of the device 700. The sensor assembly 714 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 714 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 714 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0164] The communication component 716 is configured to facilitate wired or wireless communication between the device 700 and other devices. The device 700 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 716 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0165] In an exemplary embodiment, the apparatus 700 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described method.

[0166] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 704 including instructions, and the instructions can be executed by the processor 720 of the apparatus 700 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0167] In an exemplary embodiment, a computer program product is also provided, comprising a computer program, which implements the above method when executed by the processor 720 of the apparatus 700 .

[0168] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow from the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0169] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A grouting filling method based on a ground fracturing well, characterized in that: include: After completing the fracturing operation on the target weakened area corresponding to the goaf, determining the target plugging position of the surface fracturing well corresponding to the goaf; A casing is fixed inside the surface fracturing well to prevent the loss of fracturing fluid; Controlling the plugging device to plug the casing corresponding to the target plugging position to obtain a first accommodation space of the surface fracturing well; Controlling the drilling device to drill a hole in the casing near one end of the goaf in the first accommodating space to obtain a plurality of slurry outlet holes; Control the grouting pump to inject slurry into one end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through the multiple slurry outlet holes; the second accommodation space is an abscission space or a goaf; the second accommodation space corresponds to the target plugging position.

2. The grouting filling method based on a ground fracturing well according to claim 1, characterized in that: The surface fracturing well includes a vertical section, a deflection section, and a horizontal section; and determining a target plugging position of the surface fracturing well corresponding to the goaf includes: Get the current grouting filling task; When the current grouting filling task is separation grouting, determining the target plugging position as the connection point between the vertical section and the deflecting section; The first accommodating space includes the vertical section, and the control opening device performs opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including: The drilling device is controlled to perform drilling processing on the casing in the vertical section close to one end of the goaf to obtain multiple slurry outlet holes.

3. The grouting filling method based on a ground fracturing well according to claim 1, characterized in that: The surface fracturing well includes a vertical section, a deflection section, and a horizontal section; and determining a target plugging position of the surface fracturing well corresponding to the goaf includes: Get the current grouting filling task; In a case where the current grouting filling task is goaf filling, determining the target plugging position as a connection point between the deflecting section and the horizontal section; The first accommodating space includes the vertical section and the deflecting section. The controlled opening device performs opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including: The drilling device is controlled to perform drilling processing on the casing in the vertical section close to one end of the goaf to obtain multiple slurry outlet holes.

4. The grouting filling method based on a ground fracturing well according to claim 1, characterized in that: The surface fracturing well includes a vertical section, a deflection section, and a horizontal section; and determining a target plugging position of the surface fracturing well corresponding to the goaf includes: Get the current grouting filling task; In a case where the current grouting and filling task is separation layer grouting and goaf filling, determining that the target plugging position includes a connection point between the deflecting section and the horizontal section, and a connection point between the vertical section and the deflecting section; The first accommodating space includes the vertical section and the deflecting section. The controlled opening device performs opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including: Controlling the drilling device to drill a hole in the casing near one end of the goaf in the deflection section to obtain a plurality of slurry outlet holes; The controlling of the grouting pump to inject slurry into one end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through the plurality of slurry outlet holes, comprising: Controlling the grouting pump to inject slurry into one end of the first accommodating space away from the goaf, so that the slurry is injected into the goaf along the accommodating space through the plurality of slurry outlet holes; After controlling the grouting pump to inject slurry into the end of the first accommodation space away from the goaf so that the slurry is injected into the second accommodation space along the accommodation space through the multiple slurry outlet holes, the method further includes: Controlling the blocking device to block the connection point between the vertical section and the deflecting section to obtain a third accommodating space connected to the grouting pump; the third accommodating space includes the vertical section; Performing a hole processing on the casing in the vertical section near one end of the goaf to obtain a plurality of slurry outlet holes; The grouting pump is controlled to inject slurry into one end of the vertical section away from the goaf, so that the slurry is injected into the separation space along the vertical section through multiple slurry outlet holes.

5. The grouting filling method based on a ground fracturing well according to claim 1, characterized in that: The controlled hole-opening device performs hole-opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes, including: Based on the equivalent model of the surface fracturing well and the equivalent sub-model of the slurry holes, a plurality of slurry hole layout results are generated; the slurry hole layout results include size and distribution information of the slurry holes; Iteratively optimizing the multiple slurry outlet hole layout results using a genetic algorithm to obtain a target slurry outlet hole layout result that meets preset conditions; According to the target slurry outlet hole layout result, the hole-opening device is controlled to perform hole-opening processing on the casing near one end of the goaf in the first accommodating space to obtain multiple slurry outlet holes.

6. The grouting filling method based on a ground fracturing well according to claim 2, characterized in that: Before determining the target blocking position as the connection point between the vertical section and the deflecting section, the method further includes: Obtaining the coal seam mining height and the fracture expansion coefficient of the fractured rock layer corresponding to the goaf; Determine the direct roof collapse range corresponding to the goaf based on the coal seam mining height and the fracture expansion coefficient of the fractured rock layer; Correcting the target blocking position based on the direct roof collapse range to obtain a corrected target blocking position; The controlling and plugging device plugs the casing corresponding to the target plugging position to obtain the first accommodation space of the surface fracturing well, including: The plugging device is controlled to plug the casing corresponding to the corrected target plugging position to obtain a first accommodation space of the surface fracturing well.

7. A grouting filling device based on a ground fracturing well, characterized in that: include: a determination unit, configured to determine a target plugging position of a surface fracturing well corresponding to the goaf after completing a fracturing operation on a target weakened area corresponding to the goaf; wherein a casing is fixed inside the surface fracturing well for preventing loss of fracturing fluid; a plugging unit, configured to control a plugging device to plug the casing corresponding to the target plugging position, thereby obtaining a first accommodation space of the surface fracturing well; a hole-drilling unit, configured to control a hole-drilling device to drill a casing near one end of the goaf in the first accommodating space to obtain a plurality of slurry outlet holes; The grouting filling unit is used to control the grouting pump to inject slurry into the end of the first accommodation space away from the goaf, so that the slurry is injected into the second accommodation space along the accommodation space through the multiple slurry outlet holes; the second accommodation space is an abscission space or a goaf; the second accommodation space corresponds to the target sealing position.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method according to any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

10. A computer program product comprising a computer program, characterized in that The computer program implements the method according to any one of claims 1 to 6 when executed by a processor.

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