Method and device for backfilling of mined-out areas based on lean backfill material

Abstract

The application provides a goaf filling method and device based on a lean glue filling material, relates to the field of mine exploitation, and comprises the following steps: obtaining filling aggregates and conveying the filling aggregates into a goaf to be filled; determining raw materials of filling slurry to be prepared and corresponding raw material proportions, and preparing the filling slurry based on the raw materials and the raw material proportions; conveying the filling slurry to a working face of the goaf to be filled through a filling pump and a filling pipeline, pouring the filling slurry into the goaf to be filled, and forming the lean glue filling material in the goaf to be filled; and recycling the filling slurry through a preset recycling net and a recycling pipeline at the bottom of the goaf to be filled. The filling slurry is cemented between two filling aggregate particles, a protective layer is formed on the surface of each filling aggregate particle, the lean glue cemented particle material with high porosity is realized, the filling strength is ensured, the filling slurry is saved, the filling cost is reduced, and the pollution of the components of the filling aggregate to underground water quality can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mine exploitation, and in particular to a goaf filling method based on lean glue filling material and a device thereof. BACKGROUND

[0002] Mine exploitation is gradually developing towards green and ecological, in order to effectively control the coal seam roof subsidence, it is necessary to fill the goaf, the related technology of paste filling method requires cement and other solid particles such as gangue to fill the gap between the solid particles, in order to improve the strength of the filling body, a large amount of cement slurry is needed, resulting in high filling cost; and the solid filling method directly uses solid filling, the solid filling material itself lacks cementation, and the long-term strength and rigidity cannot be guaranteed. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art.

[0004] To this end, one purpose of the present application is to provide a goaf filling method based on lean glue filling material, by obtaining filling aggregate and conveying the filling aggregate into the goaf to be filled; determining the raw materials of the filling slurry to be prepared and the corresponding raw material ratio, and preparing the filling slurry based on the raw material according to the raw material ratio; conveying the filling slurry to the working face of the goaf to be filled through the filling pump and the filling pipeline to pour into the goaf to be filled, so as to form lean glue filling material in the goaf to be filled, wherein the lean glue filling material refers to the material that the surface of the filling aggregate is covered with the filling slurry and the filling slurry forms cementation between the filling aggregate particles, and the internal of the lean glue filling material has pores with the same order of magnitude as the average particle size of the particles; the filling slurry is recycled through the recovery net and the recovery pipeline preset at the bottom of the goaf to be filled.

[0005] The goaf filling method provided by the present application forms cementation between the filling aggregate particles, and a protective layer is formed on the surface of each filling aggregate particle, which can realize the cementation of the filling aggregate and ensure the strength of the filling body, and only one layer of filling slurry flowing through the filling aggregate particles is needed, so the filling slurry is saved, the cost of filling material is reduced, and the pollution of the composition of the filling aggregate to underground water quality can be effectively avoided.

[0006] A second purpose of the present application is to provide a goaf filling device based on lean glue filling material.

[0007] A third purpose of the present application is to provide an electronic device.

[0008] A fourth purpose of the present application is to provide a non-transitory computer readable storage medium.

[0009] A fifth purpose of the present application is to provide a computer program product.

[0010] To achieve the above object, the first aspect of the present application proposes a goaf filling method based on lean glue filling material. The filling aggregate is obtained, and the filling aggregate is transported into the goaf to be filled. The raw materials of the filling slurry to be prepared and the corresponding raw material ratio are determined, and the filling slurry is prepared according to the raw material ratio based on the raw materials. The filling slurry is transported to the working face of the goaf to be filled by the filling pump and the filling pipeline, and is poured into the goaf to be filled, so as to form the lean glue filling material in the goaf to be filled. The lean glue filling material refers to the material whose surface is covered with the filling slurry and the filling slurry forms a cementation between the filling aggregates. The lean glue filling material has pores with the same order of magnitude as the average particle size of the particles. The filling slurry is recovered through the recovery net and the recovery pipeline preset at the bottom of the goaf to be filled.

[0011] According to an embodiment of the present application, the raw materials of the filling slurry to be prepared and the corresponding raw material ratio are determined, including: obtaining the first compressive strength corresponding to the filling aggregate; obtaining the second compressive strength of the lean glue filling material; determining the raw materials of the filling slurry and the corresponding raw material ratio based on the first compressive strength and the second compressive strength.

[0012] According to an embodiment of the present application, after the filling slurry is recovered through the recovery net and the recovery pipeline preset at the bottom of the goaf to be filled, it further includes: judging whether the goaf to be filled is filled or not based on the filling completion degree of the goaf to be filled; in response to the goaf to be filled not being filled, repeating the steps of pouring the filling slurry into the goaf to be filled through the filling pump and the filling pipeline, and the subsequent steps.

[0013] According to an embodiment of the present application, the raw materials of the filling slurry and the corresponding raw material ratio are determined based on the first compressive strength and the second compressive strength, including: determining the strength mapping table corresponding to the filling slurry, the filling aggregate and the lean glue filling material; querying the strength mapping table based on the first compressive strength and the second compressive strength to obtain the third compressive strength of the filling slurry; determining the raw materials of the filling slurry and the corresponding raw material ratio based on the third compressive strength.

[0014] According to an embodiment of the present application, the filling aggregate is obtained, including: obtaining a solid for making the filling aggregate; crushing, washing and screening the solid to obtain the filling aggregate, wherein the solid includes coal gangue and / or building waste.

[0015] According to an embodiment of the present application, the raw materials include cement, stone powder and water reducing agent.

[0016] According to one embodiment of the present application, the method for determining the raw material proportion of the filling slurry to be prepared comprises: obtaining a sum of a first mass corresponding to cement and a second mass corresponding to stone powder; and determining the raw material proportion of the filling slurry based on the first mass and the sum.

[0017] To achieve the above object, the second aspect of the present application provides a goaf filling device based on lean cement filling material, comprising: an acquisition module configured to acquire filling aggregates and transport the filling aggregates into a goaf to be filled; a preparation module configured to determine raw materials of filling slurry to be prepared and a corresponding raw material proportion, and prepare the filling slurry based on the raw materials according to the raw material proportion; a pouring module configured to pour the filling slurry into a working face of the goaf to be filled through a filling pump and a filling pipeline, and pour the filling slurry into the goaf to be filled, so as to form lean cement filling material in the goaf to be filled, wherein the lean cement filling material refers to a material in which a surface of the filling aggregate is covered with the filling slurry and the filling slurry forms cementation between two filling aggregates, and the lean cement filling material has pores with an average particle size order; and a recovery module configured to recover the filling slurry through a recovery net and a recovery pipeline arranged at the bottom of the goaf to be filled.

[0018] According to one embodiment of the present application, the preparation module is further configured to: obtain a first compressive strength corresponding to the filling aggregate; obtain a second compressive strength of the lean cement filling material; and determine the raw material proportion of the filling slurry based on the first compressive strength and the second compressive strength.

[0019] According to one embodiment of the present application, the recovery module is further configured to: determine whether the goaf to be filled is filled based on a filling completion degree of the goaf to be filled; and in response to the goaf to be filled not being filled, repeatedly pour the filling slurry into the working face of the goaf to be filled through the filling pump and the filling pipeline, pour the filling slurry into the goaf to be filled, and perform subsequent steps.

[0020] According to one embodiment of the present application, the preparation module is further configured to: determine a strength mapping table corresponding to the filling slurry, the filling aggregate, and the lean cement filling material; query the strength mapping table based on the first compressive strength and the second compressive strength to obtain a third compressive strength of the filling slurry; and determine the raw material proportion of the filling slurry based on the third compressive strength.

[0021] According to one embodiment of the present application, the acquisition module is further configured to: acquire a solid used for making the filling aggregate; and crush, wash, and screen the solid to obtain the filling aggregate, wherein the solid comprises coal gangue and / or building waste.

[0022] According to one embodiment of the present application, the raw materials comprise cement, stone powder, and water reducing agent.

[0023] According to one embodiment of the present application, the equipping module is further configured to: obtain a sum value of the first mass corresponding to the cement and the second mass corresponding to the stone powder; and determine the raw material ratio of the filling slurry based on the first mass and the sum value. To achieve the above object, a third aspect of the present application provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the goaf filling method based on lean cement filling material according to the first aspect of the present application.

[0024] To achieve the above object, a fourth aspect of the present application provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to implement the goaf filling method based on lean cement filling material according to the first aspect of the present application.

[0025] To achieve the above object, a fifth aspect of the present application provides a computer program product comprising a computer program, wherein the computer program is executed by a processor to implement the goaf filling method based on lean cement filling material according to the first aspect of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above aspects and advantages of the present application and / or additional aspects and advantages will become apparent from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

[0027] Figure 1 FIG. 1 is a schematic diagram of a goaf filling method based on lean cement filling material according to one embodiment of the present application.

[0028] Figure 2 FIG. 2 is a goaf filling construction process diagram of a goaf filling method based on lean cement filling material according to one embodiment of the present application.

[0029] Figure 3 FIG. 3 is a schematic diagram of determining the raw material and the corresponding raw material ratio of the filling slurry to be equipped according to one embodiment of the present application.

[0030] Figure 4 FIG. 4 is a general flowchart of a goaf filling method based on lean cement filling material according to one embodiment of the present application.

[0031] Figure 5 FIG. 5 is a schematic diagram of a goaf filling device based on lean cement filling material according to one embodiment of the present application.

[0032] Figure 6 FIG. 6 is a schematic diagram of an electronic device according to one embodiment of the present application. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described in detail below with reference to examples shown in the attached drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0034] Firstly, some terms involved in the present application are explained:

[0035] Filling aggregate: refers to irregular particles obtained after crushing, washing and screening of solid used for making filling aggregate.

[0036] Filling slurry: refers to a slurry obtained by mixing cement, stone powder and high-efficiency water reducing agent, which is used for pouring filling aggregate in the goaf to be filled.

[0037] Poor glue filling material: refers to a material with compressive strength formed by filling slurry and filling aggregate after the filling slurry is poured and left to stand in the goaf to be filled, wherein the two filling aggregate particles in the poor glue filling material are cemented, each filling aggregate particle surface forms a protective layer, and there are pores with the same order of magnitude as the average particle size in the poor glue filling material.

[0038] Figure 1 is an exemplary embodiment of a goaf filling method shown in the present application, as shown in Figure 1 The goaf filling method comprises the following steps:

[0039] S101, obtaining filling aggregate and conveying the filling aggregate into the goaf to be filled.

[0040] In the process of coal seam mining, the goaf is formed in the ore body due to mining. Under the action of overburden pressure and underground water and other factors, the coal seam on both sides of the coal pillar and the mining area softens and loses strength, causing the overburden strata to fracture and collapse, causing surface subsidence and even collapse above the goaf. In order to prevent the above problems from occurring, eliminate production hazards, and effectively control the roof subsidence of the coal seam, the goaf needs to be filled in a timely and planned manner.

[0041] Before filling the goaf to be filled, the solid used for making filling aggregate needs to be obtained.

[0042] Optionally, in the present application, the solid for making the filling aggregate can use the coal gangue produced in the process of coal mining to eliminate the coal gangue caused by underground mining and save the treatment and disposal cost of the coal gangue. The coal gangue is a solid waste produced in the process of coal production and processing. During the storage process of the coal gangue, the harmful elements in the coal gangue will dissolve under the action of rain and enter the water body or soil environment, causing damage to the nutrients in the soil, and in severe cases, causing acidification of the land around the coal gangue hill, affecting human health and vegetation growth.

[0043] Optionally, in the present application, in addition to the traditional filling commonly used coal gangue, the solid for making the filling aggregate can also use various solid wastes caused by construction waste, loess and other production and life to solve the environmental pollution caused by solid waste from industry or life.

[0044] After determining the solid for making the filling aggregate, the solid is crushed, washed and sieved to obtain the filling aggregate, and the filling aggregate is transported into the goaf to be filled. For example, the filling aggregate can be irregular particles of 10mm-15mm obtained by crushing the coal gangue.

[0045] S102, determining the raw materials of the filling slurry to be prepared and the corresponding raw material ratio, and preparing the filling slurry based on the raw materials according to the raw material ratio.

[0046] Determine the compressive strength of the filling slurry to be prepared, and determine the raw materials of the filling slurry to be prepared and the corresponding raw material ratio based on the compressive strength.

[0047] For example, the raw materials of the filling slurry can include cement, stone powder and high-efficiency water reducing agent. The mass of the cement in the raw materials is denoted as the first mass, the mass of the stone powder in the raw materials is denoted as the second mass, the sum of the first mass corresponding to the cement and the second mass corresponding to the stone powder is obtained, and the ratio of the first mass to the sum is used as the raw material ratio of the filling slurry, i.e. the raw material ratio is: the first mass of the cement / (the first mass of the cement+the second mass of the stone powder). According to the raw material ratio, the cement and the stone powder are prepared, and after adding an appropriate amount of high-efficiency water reducing agent, the three are mixed to obtain the filling slurry. The high-efficiency water reducing agent has a strong dispersion effect on the cement, can greatly improve the fluidity of the cement mixture and the slump of the poor glue filling material formed in the goaf, and can greatly reduce the water consumption and significantly improve the workability of the filling material.

[0048] The filling slurry prepared by the cement, the stone powder and the high-efficiency water reducing agent is called self-compacting cement slurry. Compared with the conventional cement slurry, the self-compacting cement slurry has better fluidity and can push the filling aggregate under its own weight or pump pressure to achieve the effect of self-compaction.

[0049] S103, the filling slurry is transported to the working face of the goaf to be filled through the filling pump and filling pipeline and poured into the goaf to form a lean rubber filling material in the goaf to be filled. The lean rubber filling material refers to the material in which the surface of the filling aggregate is covered with filling slurry and the filling slurry forms a bond between the two filling aggregates. The lean rubber filling material has pores with the same order of magnitude as the average particle size.

[0050] Figure 2 This application illustrates a construction process diagram for filling a goaf, such as... Figure 2 As shown, Figure 2 In the diagram, label 1 indicates a completed backfill goaf, label 2 indicates a goaf to be filled, label 3 indicates a filled goaf awaiting cementation, label 4 indicates the coal seam roof, label 5 indicates the coal seam to be mined, label 6 indicates the reserved filling pipeline, label 7 indicates the filling pump, label 8 indicates the coal seam floor, label 9 indicates the stope support, label 10 indicates the filling slurry recovery network, and label 11 indicates the filling slurry recovery pipeline. The black dots in completed backfill goaf 1 represent the cementation formed between the contact points of two pairs of filling aggregates.

[0051] The filling grout is transported to the working face of the goaf 2 to be filled via filling pump 7 and filling pipeline 6. Using controlled grouting technology, the filling grout is poured through the pre-reserved filling pipeline 6 above the goaf and below the roof. As the filling grout flows over the filling aggregate, it leaves a layer of grout on its surface. After the filling grout at each contact point between the filling aggregates is allowed to harden, the cementation of the filling aggregate particles is completed. After the filling grout on the surface of each filling aggregate particle is allowed to harden, a protective layer is formed on the surface of each filling aggregate particle to prevent the components in the coal gangue from affecting the surrounding water quality. In this application, the material composed of a filling aggregate surface covered with filling grout and the filling grout forming a bond between each pair of filling aggregates is used as a lean-rubber filling material. It is not difficult to understand that because the aggregates in the lean rubber filler are bonded together rather than completely filled into a solid, the porosity of the lean rubber filler is relatively high, generally ranging from 5% to 30%.

[0052] S104, the filling slurry is recovered through a pre-set recovery net and recovery pipeline at the bottom of the goaf to be filled.

[0053] To save on filling grout and reduce the cost of lean adhesive filling materials, such as Figure 2 As shown, excess filling slurry is recovered to filling pump 7 through the pre-set filling slurry recovery net 10 and filling slurry recovery pipe 11 at the bottom of the goaf to be filled.

[0054] It should be noted that in this application, after filling is completed, the contact points between the filling aggregates in the final static hardened lean glue filling material are cemented, a protective layer is formed on the surface of each filling aggregate, and it is not necessary to fill all the gaps between the filling aggregates with filling slurry. During the filling process, the excess filling slurry is recycled through the pre-set recycling net and recycling pipeline at the bottom of the to-be-filled goaf.

[0055] The goaf filling method based on lean glue filling material provided in the embodiments of the application comprises the following steps: obtaining filling aggregates and conveying the filling aggregates into a to-be-filled goaf; determining raw materials of filling slurry to be prepared and corresponding raw material proportions, and preparing the filling slurry based on the raw materials according to the raw material proportions; conveying the filling slurry to a working face of the to-be-filled goaf through a filling pump and a filling pipeline to perform pouring on the to-be-filled goaf, so as to form lean glue filling material in the to-be-filled goaf, wherein the lean glue filling material refers to a material in which the surface of the filling aggregate is covered with the filling slurry and the filling slurry is cemented between the filling aggregates, and the lean glue filling material has pores with the same order of magnitude as the average particle size of the particles; and recycling the filling slurry through a pre-set recycling net and recycling pipeline at the bottom of the to-be-filled goaf. The lean glue filling material formed in the application is cemented between the filling aggregate particles, and a protective layer is formed on the surface of each filling aggregate particle, which can realize the cementation of the filling aggregates, ensure the strength of the filling body, save the filling slurry, reduce the cost of the filling material, and effectively avoid the pollution of the components of the filling aggregates to underground water quality.

[0056] Further, after the filling slurry is recycled through the pre-set recycling net and recycling pipeline at the bottom of the to-be-filled goaf, it is necessary to determine whether the to-be-filled goaf is filled based on the filling completion degree of the to-be-filled goaf. For example, if the length of the to-be-filled goaf in the horizontal direction is 20 meters and only 15 meters of the to-be-filled goaf has been filled, it is considered that the to-be-filled goaf is not filled.

[0057] If the to-be-filled goaf is not filled, the filling slurry is repeatedly conveyed to the working face of the to-be-filled goaf through the filling pump and the filling pipeline to perform pouring on the unfilled part of the to-be-filled goaf and subsequent steps.

[0058] If the to-be-filled goaf is filled, the filling is ended.

[0059] Figure 3 is an exemplary embodiment of a goaf filling method shown in the application, as shown in Figure 3 Based on the above embodiment, the raw materials of the filling slurry to be prepared and the corresponding raw material proportions are determined, which comprises the following steps:

[0060] S301, acquire the first compressive strength corresponding to the filling aggregate.

[0061] The compressive strength corresponding to the filling aggregate is recorded as the first compressive strength. After the filling aggregate is acquired, the filling aggregate can be measured to acquire the first compressive strength corresponding to the filling aggregate. The first compressive strength can be understood as the uniaxial compressive strength of the filling aggregate.

[0062] S302, acquire the second compressive strength of the lean glue filling material.

[0063] The lean glue filling material refers to a material with compressive strength formed by the filling slurry and the filling aggregate after the filling slurry is poured and placed in the filling aggregate in the mined-out area to be filled, wherein the two filling aggregate particles in the lean glue filling material are cemented, and a protective layer is formed on the surface of each filling aggregate particle.

[0064] The compressive strength corresponding to the lean glue filling material is recorded as the second compressive strength. In this application, since the lean glue filling material is obtained after pouring, it cannot be directly measured at present, in order to determine the raw material ratio of the filling slurry, the historical data can be queried based on the characteristics of the current mined-out area to be filled, to determine a compressive strength as the second compressive strength of the target obtained lean glue filling material. For example, in the case of soft soil around the coal seam, the second compressive strength of the target obtained lean glue filling material is larger, and in the case of hard soil around the coal seam, the second compressive strength of the target obtained lean glue filling material is smaller.

[0065] S303, based on the first compressive strength and the second compressive strength, determine the raw material and the corresponding raw material ratio of the filling slurry.

[0066] The compressive strength corresponding to the filling slurry to be prepared is recorded as the third compressive strength.

[0067] According to the first compressive strength and the second compressive strength determined above, the strength mapping table corresponding to the filling slurry, the filling aggregate and the lean glue filling material can be queried to acquire the third compressive strength of the filling slurry, and the raw material and the corresponding raw material ratio of the filling slurry with the third compressive strength can be determined according to the third compressive strength. The strength mapping table corresponding to the filling slurry, the filling aggregate and the lean glue filling material can be obtained by multiple experiments in advance, so as to be called when needed in the future.

[0068] Table 1 is a schematic diagram of a strength mapping table corresponding to the filling slurry, the filling aggregate and the lean glue filling material. As shown in Table 1, when the first compressive strength corresponding to the filling aggregate is determined, the greater the third compressive strength of the filling slurry, the greater the second compressive strength of the lean glue filling material obtained finally. In the present application, the third compressive strength of the filling slurry can be determined by the first compressive strength corresponding to the filling aggregate and the second compressive strength of the lean glue filling material obtained by the target of the filling goaf.

[0069] For example, if the measured first compressive strength of the current filling aggregate is 12.5 MPa, and based on the characteristics of the current filling goaf, the second compressive strength of the lean glue filling material obtained by the target is determined to be 3.5 MPa, then the third compressive strength of the filling slurry can be 1.4 MPa or 1.9 MPa. The difficulty of obtaining raw materials with a third compressive strength of 1.4 MPa or 1.9 MPa, the cost of the raw materials, and other factors can be compared to determine the appropriate raw materials and the corresponding raw material ratio.

[0070] Table 1 is a strength mapping table corresponding to the filling slurry, the filling aggregate and the lean glue filling material

[0071]

[0072] The embodiment of the present application determines the raw materials of the filling slurry to be prepared and the corresponding raw material ratio based on the first compressive strength and the second compressive strength. By controlling the strength of the filling slurry, the material parameters can be optimally matched for different types of solid waste strength, which not only ensures the filling effect, but also reduces the filling cost.

[0073] Figure 4 is a general flowchart of a goaf filling method shown by the present application, as Figure 4 shown, the goaf filling method comprises the following steps:

[0074] S401, obtaining a solid for making a filling aggregate.

[0075] S402, crushing, washing and screening the solid to obtain the filling aggregate, wherein the solid includes coal gangue and / or building waste.

[0076] S403, conveying the filling aggregate into a goaf to be filled.

[0077] For the implementation of steps S401-S403, please refer to the introduction of the related part in the above embodiment, which will not be repeated here.

[0078] S404, obtaining the first compressive strength corresponding to the filling aggregate.

[0079] S405, obtaining the second compressive strength of the lean glue filling material to be filled in the target goaf.

[0080] S406, determining the raw materials of the filling slurry to be prepared and the corresponding raw material ratio based on the first compressive strength and the second compressive strength, wherein the raw materials include cement, stone powder and water reducing agent, and the raw material ratio is: the first mass of cement / (the first mass of cement+the second mass of stone powder).

[0081] S407, preparing the filling slurry based on the raw materials according to the raw material ratio.

[0082] For the implementation of steps S404-S407, please refer to the relevant part of the above-mentioned embodiments, which will not be repeated here.

[0083] S408, delivering the filling slurry to the working face of the goaf to be filled through the filling pump and the filling pipeline, and pouring the filling slurry into the goaf to be filled, so as to form the lean glue filling material in the goaf to be filled, wherein the lean glue filling material refers to the material that the surface of the filling aggregate is covered with the filling slurry and the filling slurry forms a cement between two filling aggregates, and the lean glue filling material has pores with the same order of magnitude as the average particle size of the particles.

[0084] S409, recycling the filling slurry through the recycling net and the recycling pipeline preset at the bottom of the goaf to be filled.

[0085] S410, judging whether the goaf to be filled is filled or not based on the filling completion degree of the goaf to be filled.

[0086] S411, in response to the goaf to be filled not being filled, repeatedly delivering the filling slurry to the working face of the goaf to be filled through the filling pump and the filling pipeline, and pouring the filling slurry into the goaf to be filled.

[0087] S412, in response to the goaf to be filled being filled, ending the filling.

[0088] For the implementation of steps S408-S412, please refer to the relevant part of the above-mentioned embodiments, which will not be repeated here.

[0089] The goaf filling method based on the lean glue filling material provided in the embodiment of the application comprises the following steps: obtaining filling aggregates and conveying the filling aggregates into a goaf to be filled; determining raw materials of filling slurry to be prepared and corresponding raw material proportions, and preparing the filling slurry based on the raw materials according to the raw material proportions; conveying the filling slurry to a working face of the goaf to be filled through a filling pump and a filling pipeline to pour the filling slurry into the goaf to be filled, so as to form the lean glue filling material in the goaf to be filled, wherein the lean glue filling material refers to a material in which surfaces of the filling aggregates are covered with the filling slurry and the filling slurry forms a cementation between the filling aggregates, and the lean glue filling material has pores with the same order of magnitude as average particle sizes of the filling aggregates; and the filling slurry is recovered through a recovery net and a recovery pipeline preset at the bottom of the goaf to be filled. The lean glue filling material formed in the application forms a cementation between the filling aggregates, and a protective layer is formed on the surface of each filling aggregate, so that the cementation of the filling aggregates is realized, the strength of the filling body is ensured, only one layer of the filling slurry flowing through the filling aggregates needs to be reserved, the filling slurry is saved, the cost of the filling material is reduced, and the pollution of the components of the filling aggregates to underground water quality can be effectively avoided.

[0090] Figure 5 FIG. 1 is a schematic diagram of a goaf filling device based on a lean glue filling material according to the application. Figure 5 As shown in FIG. 1, the goaf filling device 500 based on the lean glue filling material comprises an obtaining module 501, a preparing module 502, a pouring module 503 and a recovering module 504, wherein:

[0091] The obtaining module 501 is configured to obtain filling aggregates corresponding to a goaf to be filled, and convey the filling aggregates into the goaf to be filled.

[0092] The preparing module 502 is configured to determine raw materials of filling slurry to be prepared and corresponding raw material proportions, and prepare the filling slurry based on the raw materials according to the raw material proportions.

[0093] The pouring module 503 is configured to convey the filling slurry to a working face of the goaf to be filled through a filling pump and a filling pipeline, and pour the filling slurry into the goaf to be filled, so that surfaces of the filling aggregates are covered with the filling slurry.

[0094] The recovering module 504 is configured to recover the filling slurry through a recovery net and a recovery pipeline preset at the bottom of the goaf to be filled.

[0095] The goaf filling device based on the lean glue filling material provided by the embodiment of the application obtains the filling aggregate and transports the filling aggregate to the goaf to be filled; the raw material of the filling slurry to be prepared and the corresponding raw material ratio are determined, and the filling slurry is prepared according to the raw material ratio based on the raw material; the filling slurry is transported to the working face of the goaf to be filled through the filling pump and the filling pipeline to carry out pouring on the goaf to be filled, so as to form the lean glue filling material in the goaf to be filled, wherein the lean glue filling material refers to the material in which the surface of the filling aggregate is covered with the filling slurry and the filling slurry forms the cementation between the filling aggregates, and the internal part of the lean glue filling material has the pores with the same average particle size order as the particles; the filling slurry is recycled through the recovery net and the recovery pipeline preset at the bottom of the goaf to be filled. The lean glue filling material formed by the application forms the cementation between the filling aggregates, and a protective layer is formed on the surface of each filling aggregate, which can realize the cementation of the filling aggregate, ensure the strength of the filling body, save the filling slurry, reduce the cost of the filling material, and effectively avoid the pollution of the components of the filling aggregate to the underground water quality.

[0096] Further, the preparation module 502 is further used for: obtaining the first compressive strength corresponding to the filling aggregate; obtaining the second compressive strength of the lean glue filling material; and determining the raw material of the filling slurry and the corresponding raw material ratio based on the first compressive strength and the second compressive strength.

[0097] Further, the recovery module 504 is further used for: judging whether the goaf to be filled is filled up based on the filling completion degree of the goaf to be filled; and repeatedly transporting the filling slurry to the working face of the goaf to be filled through the filling pump and the filling pipeline to carry out pouring on the goaf to be filled and subsequent steps in response to the goaf to be filled not being filled up.

[0098] Further, the preparation module 502 is further used for: determining the strength mapping table corresponding to the filling slurry, the filling aggregate and the lean glue filling material; obtaining the third compressive strength of the filling slurry by querying the strength mapping table based on the first compressive strength and the second compressive strength; and determining the raw material of the filling slurry and the corresponding raw material ratio based on the third compressive strength.

[0099] Further, the obtaining module 501 is further used for: obtaining a solid used for making the filling aggregate; and crushing, washing and screening the solid to obtain the filling aggregate, wherein the solid includes coal gangue and / or building waste.

[0100] Further, the raw material in the preparation module 502 includes cement, stone powder and water reducing agent.

[0101] Further, the equipped module 502 is further used for: obtaining a sum value of the first quality corresponding to the cement and the second quality corresponding to the stone powder; and determining the raw material proportion of the filling slurry based on the first quality and the sum value.

[0102] To achieve the above-mentioned embodiments, the embodiments of the present application further propose an electronic device 600, as shown in the figure, the electronic device 600 comprises a processor 601 and a memory 602 in communication connection with the processor, the memory 602 stores instructions executable by at least one processor, and the instructions are executed by the at least one processor 601 to implement the goaf filling method based on lean glue filling material as shown in the above-mentioned embodiments. Figure 6

[0103] To achieve the above-mentioned embodiments, the embodiments of the present application further propose a non-transitory computer readable storage medium storing computer instructions, wherein the computer instructions are used to make a computer implement the goaf filling method based on lean glue filling material as shown in the above-mentioned embodiments.

[0104] To achieve the above-mentioned embodiments, the embodiments of the present application further propose a computer program product comprising a computer program, the computer program implements the goaf filling method based on lean glue filling material as shown in the above-mentioned embodiments when executed by a processor.

[0105] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or a specific order of limiting the indicated technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0106] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0107] Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.​

Claims

1. A method of goaf filling based on lean backfill material, characterized by, The method comprises the following steps: obtaining filling aggregate and conveying the filling aggregate into a goaf to be filled; determining raw materials of filling slurry to be prepared and corresponding raw material proportions, and preparing the filling slurry based on the raw materials according to the raw material proportions; the raw materials include cement, stone powder and water reducing agent; conveying the filling slurry to a working face of the goaf to be filled through a filling pump and a filling pipeline to perform pouring on the goaf to be filled, so as to form a lean glue filling material in the goaf to be filled, wherein the lean glue filling material refers to a material in which surfaces of the filling aggregate are covered with the filling slurry and the filling slurry forms a cementation between two filling aggregates, and the lean glue filling material has pores with an average particle size order same as that of particles; recovering the filling slurry through a recovery net and a recovery pipeline pre-set at a bottom of the goaf to be filled; wherein the determination of the raw materials of the filling slurry to be prepared and the corresponding raw material proportions comprises: obtaining a first compressive strength corresponding to the filling aggregate; obtaining a second compressive strength of the lean glue filling material; determining the raw material proportions of the filling slurry based on the first compressive strength and the second compressive strength; wherein the determination of the raw material proportions of the filling slurry based on the first compressive strength and the second compressive strength comprises: determining a strength mapping table corresponding to the filling slurry, the filling aggregate and the lean glue filling material; obtaining a third compressive strength of the filling slurry by querying the strength mapping table based on the first compressive strength and the second compressive strength; determining the raw material proportions of the filling slurry based on the third compressive strength.

2. The method of claim 1, wherein, After the recovery of the filling slurry through the recovery net and the recovery pipeline pre-set at the bottom of the goaf to be filled, the method further comprises: judging whether the goaf to be filled is filled up based on a filling completion degree of the goaf to be filled; in response to the goaf to be filled not being filled up, repeatedly conveying the filling slurry to the working face of the goaf to be filled through the filling pump and the filling pipeline to perform pouring on the goaf to be filled and subsequent steps.

3. The method according to any one of claims 1-2, characterized in that, The obtaining of the filling aggregate comprises: obtaining a solid used for making the filling aggregate; crushing, washing and screening the solid to obtain the filling aggregate, wherein the solid includes coal gangue and / or building waste.

4. The method of claim 1, wherein, The determination of the raw material proportions of the filling slurry to be prepared comprises: obtaining a sum of a first mass corresponding to the cement and a second mass corresponding to the stone powder; determining the raw material proportions of the filling slurry based on the first mass and the sum.

5. A gob filling device based on lean backfill material, characterized in that, The method comprises the following steps: obtaining filling aggregate and conveying the filling aggregate into a goaf to be filled; determining raw materials of filling slurry to be prepared and corresponding raw material proportions, and preparing the filling slurry based on the raw materials according to the raw material proportions; the raw materials include cement, stone powder and water reducing agent; conveying the filling slurry to a working face of the goaf to be filled through a filling pump and a filling pipeline to perform pouring on the goaf to be filled, so as to form a lean glue filling material in the goaf to be filled, wherein the lean glue filling material refers to a material in which surfaces of the filling aggregate are covered with the filling slurry and the filling slurry forms a cementation between two filling aggregates, and the lean glue filling material has pores with an average particle size order same as that of particles; recovering the filling slurry through a recovery net and a recovery pipeline pre-set at a bottom of the goaf to be filled; wherein the determination of the raw materials of the filling slurry to be prepared and the corresponding raw material proportions comprises: obtaining a first compressive strength corresponding to the filling aggregate; obtaining a second compressive strength of the lean glue filling material; determining the raw material proportions of the filling slurry based on the first compressive strength and the second compressive strength; wherein the determination of the raw material proportions of the filling slurry based on the first compressive strength and the second compressive strength comprises: determining a strength mapping table corresponding to the filling slurry, the filling aggregate and the lean glue filling material; obtaining a third compressive strength of the filling slurry by querying the strength mapping table based on the first compressive strength and the second compressive strength; determining the raw material proportions of the filling slurry based on the third compressive strength. After the recovery of the filling slurry through the recovery net and the recovery pipeline pre-set at the bottom of the goaf to be filled, the method further comprises: judging whether the goaf to be filled is filled up based on a filling completion degree of the goaf to be filled; in response to the goaf to be filled not being filled up, repeatedly conveying the filling slurry to the working face of the goaf to be filled through the filling pump and the filling pipeline to perform pouring on the goaf to be filled and subsequent steps. The obtaining of the filling aggregate comprises: obtaining a solid used for making the filling aggregate; crushing, washing and screening the solid to obtain the filling aggregate, wherein the solid includes coal gangue and / or building waste. The determination of the raw material proportions of the filling slurry to be prepared comprises: obtaining a sum of a first mass corresponding to the cement and a second mass corresponding to the stone powder; determining the raw material proportions of the filling slurry based on the first mass and the sum. The pouring module is used for pouring the filling slurry through the filling pump and the filling pipeline to the working face of the gob to be filled, and pouring the gob to be filled, so as to form the lean glue filling material in the gob to be filled, wherein the lean glue filling material refers to a material in which the surface of the filling aggregate is covered with the filling slurry, the filling slurry is cemented between the filling aggregates, and the inside of the lean glue filling material has pores with the same order of magnitude as the average particle size of the particles. The recycling module is used for recycling the filling slurry through the recycling net and the recycling pipeline arranged at the bottom of the gob to be filled. 6.An electronic device, comprising: at least one processor; and a memory connected to the at least one processor in communication; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-4.

7. A non-transitory computer readable storage medium having stored thereon computer instructions, wherein, The computer instructions are used to enable the computer to perform the method according to any one of claims 1-4.

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