A system and method for preventing side collapse of filling body of subsequent filling mine room

Abstract

The present invention relates to the technical field of mine filling, and discloses a system and method for preventing the side walls of a filling body of a subsequent filling mine room from collapsing. The system for preventing the side walls of a filling body of a subsequent filling mine room from collapsing includes multiple anti-collapse devices. A roof of a first-step mine room is vertically formed with multiple mounting holes on the side near the second-step mine pillar. The anti-collapse device includes an anti-collapse component and a suspension support component. The head end of the anti-collapse component is connected to the suspension support component, and the tail end of the anti-collapse component passes through the mounting hole and extends into the first-step mine room along the length direction of the mounting hole. The suspension support component is arranged on a side of the roof facing away from the first-step mine room and is arranged corresponding to the mounting hole to support the anti-collapse component to be installed in the first-step mine room. The present invention aims to solve the technical problem of the side walls of the filling body of a first-step mine room collapsing.

Description

Technical Field

[0001] The present invention relates to the technical field of mine chamber filling, and in particular to a system and method for preventing the side walls of a filling body of a subsequent mine chamber from collapsing. Background Art

[0002] The subsequent backfill mining method refers to the process of first mining the ore body and then filling the goaf (i.e. the space that has been mined) with specific materials. The subsequent backfill mining method is a mining technology widely used in the mineral mining industry. This method combines mining operations with the backfill process. The backfill can support the goaf, reduce the risk of surface collapse, improve the safety of mining operations, protect surface buildings and infrastructure, and reduce environmental impact. At the same time, it can reduce dependence on pillars, achieve more complete ore mining, and increase ore recovery rate; but due to the limited strength of the backfill in the first-step mine room, during the mining of the second-step pillars in the second-step mine room, the side walls of the backfill in the first-step mine room are prone to collapse. In addition, when mining the second-step pillars, blasting is required in the second-step pillars, which will cause impact damage to the side walls of the backfill, causing the backfill to collapse more seriously, resulting in increased mixing of ore mined from the second-step pillars, reduced grade and other deficiencies or problems.

[0003] Therefore, in order to reduce the mixing of ore mined from the second-step pillar mining and improve the grade of ore mined from the second-step pillar mining, it is necessary to propose a system and method that can prevent the side collapse of the first-step mine filling body. Summary of the Invention

[0004] The main purpose of the present invention is to provide a system and method for preventing the side walls of a mine filling body from collapsing in a step.

[0005] To achieve the above-mentioned objectives, the present invention proposes a side anti-collapse system for the filling body of a subsequent filling mine chamber, comprising a plurality of anti-collapse devices. In a one-step mine chamber and a two-step mine pillar arranged in parallel laterally, a roof of the one-step mine chamber is vertically formed with a plurality of vertical mounting holes close to the side of the two-step mine pillar. The anti-collapse device comprises an anti-collapse component and a suspension support component. The head end of the anti-collapse component is connected to the suspension support component, and the tail end of the anti-collapse component passes through the mounting hole and extends into the one-step mine chamber along the length direction of the mounting hole. The suspension support component is arranged on a side of the roof away from the one-step mine chamber and is arranged corresponding to the mounting hole to support the anti-collapse component to be installed in the one-step mine chamber.

[0006] Preferably, the anti-collapse component includes a plurality of anti-collapse elements connected in sequence and connecting elements arranged corresponding to the anti-collapse elements, the head end of the anti-collapse element is upward, and the tail end of the anti-collapse element is downward, and the connecting element is used to connect the head end of one of the anti-collapse elements and the tail end of the next anti-collapse element to form the anti-collapse component, and the head end of the last anti-collapse element is used to be connected to the suspension support component.

[0007] Preferably, the connecting element is a cylindrical structural member, and the connecting element is used to be arranged along the length direction of the mounting hole. The connecting element is formed with a through hole along its own length direction. The upper section of the through hole is used to connect with the tail end of the corresponding anti-collapse element, and the lower section of the through hole is used to connect with the head end of the corresponding anti-collapse element.

[0008] Preferably, the suspension support component includes a support tube and a plurality of fixing bolts, the bottom end of the support element is used to support the side of a step mine room roof away from a step mine room floor, the other end of the support element extends away from a step mine room floor, the outer wall of the support element is surrounded to form a fixing hole, the outer wall of the support element is formed with threaded holes corresponding to the fixing bolts along the radial direction of the fixing hole, and the fixing bolts are used to cooperate with the threaded holes to fix the tail end of the anti-collapse component on the support element.

[0009] Preferably, the depth of the mounting hole exceeds the height of a roof of a mine room, the mounting hole is vertically arranged or inclined, and the deflection rate of the mounting hole is less than 5%.

[0010] In addition, to achieve the above-mentioned purpose, the present invention further proposes a method for preventing the side walls of a filling body of a subsequent filling chamber from collapsing, which is used for mining a chamber according to the system for preventing the side walls of a filling body of a subsequent filling chamber. The method comprises the following steps:

[0011] Before mining a first-step mine chamber, a drilling area is determined on the roof of the first-step mine chamber, and a plurality of mounting holes are drilled in the drilling area;

[0012] After the mining of the mine is completed in step 1, the anti-collapse components are assembled and installed in the mounting holes one by one;

[0013] Prepare the filling slurry, transport the filling slurry to the first-step mine room through the filling pipeline for filling, and after the filling body reaches the set strength, the second-step mine pillar is mined.

[0014] Preferably, in the step of determining a drilling area on the roof of the first-step mine room and drilling a plurality of mounting holes in the drilling area, the drilling area is a rectangular area on the side of the interface between the first-step mine room and the second-step mine pillar facing the roof of the first-step mine room, the width of the drilling area ranges from 3m to 6m, and the density of drilling the mounting holes in the drilling area ranges from 0.5m×0.5m to 1.5m×1.5m.

[0015] 14. The repairing kit for automotive dents, according to claim 13, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole comprises a through-hole, a screw bolt, and a nut. The through-hole comprises a through-hole, a screw bolt, and a nut. The through-hole comprises a through-hole. The bosses comprise a through-hole, a screw bolt, and a nut.

[0016] The steps of assembling the anti-collapse devices and installing them in the mounting holes in a one-to-one correspondence include:

[0017] Arrange the suspension support components in a one-to-one correspondence with the mounting holes, and loosen the fixing bolts of the suspension support components;

[0018] Inserting the anti-collapse elements into the mounting holes in sequence through the fixing holes, and connecting the anti-collapse elements in sequence with the connecting elements to form the anti-collapse component;

[0019] Tighten the fixing bolts to fix the last anti-collapse element to the suspension support component.

[0020] Preferably, the steps of sequentially inserting the anti-collapse elements into the mounting holes through the fixing holes and connecting the anti-collapse elements with the connecting elements to form the anti-collapse component include:

[0021] Pass the tail end of one of the anti-collapse elements through the fixing hole of the suspension support component, lower the anti-collapse element along the mounting hole, and then tighten the fixing bolt to fix the anti-collapse element to the suspension support component so that the head end of the anti-collapse element remains outside the suspension support component;

[0022] Use a connecting element to connect the tail end of the next anti-collapse element to the head end of the anti-collapse element in the previous step, loosen the fixing bolts, and continue to lower the connected anti-collapse elements along the mounting holes, then tighten the fixing bolts to fix the anti-collapse element in this step to the suspension support component, so that the head end of the anti-collapse element in this step stays outside the suspension support component;

[0023] Repeat the previous step until the tail end of the first anti-collapse element contacts the floor of a mine room.

[0024] Preferably, the steps of preparing the filling slurry, transporting the filling slurry through a filling pipe to the first-step ore chamber for filling, curing the filling body to reach a set strength, and then mining the second-step ore pillar include:

[0025] The underflow and the concentrated water after the deep cone thickener are weighed by flow meters respectively, the cement in the cement silo is weighed by a powder scale, and the underflow, concentrated water and cement are transported to a mixing drum for mixing to prepare the filling slurry;

[0026] Use a filling industrial pump to transport the filling slurry to the first-step mine room through the filling pipe. First, fill the surface of the first-step mine room with the filling slurry, then fill the first-step mine room part, and finally fill and connect the top;

[0027] After the curing filling body reaches the set strength, the second-step pillar is mined.

[0028] In the technical solution of the present invention, by setting the anti-collapse components and the suspension support components, before mining the first-step mine chamber, a plurality of installation holes are drilled on the roof of the first-step mine chamber, the anti-collapse components are assembled and installed one by one in the installation holes, and then the first-step mine chamber is mined, and then the filling slurry is filled into the further mine chamber. After the filling slurry solidifies, the anti-collapse components form a skeleton on the side of the filling body close to the second-step mine chamber, thereby improving the strength of the side of the filling body close to the second-step mine chamber, and can effectively prevent the side of the filling body of the first-step mine chamber from collapsing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0030] Figure 1 It is a structural schematic diagram of the side wall anti-collapse system of the filling body of the subsequent filling chamber of the present invention;

[0031] Figure 2 for Figure 1 Cross-sectional view at AA in the middle;

[0032] Figure 3 for Figure 1 Cross-sectional view at the middle BB;

[0033] Figure 4 This is a structural diagram of the anti-collapse device.

[0034] Description of Figure Numbers:

[0035] 1-One-step mine chamber; 101-Roof; 102-Mounting hole; 2-Two-step mine chamber; 3-Drilling chamber; 4-Anti-collapse component; 5-Drilling chamber; 6-Top receiving trench; 7-Bottom receiving trench; 8-Mine access road; 9-Mine access connecting road; 10-Chute; 11-Upper stage transport tunnel; 12-Anti-collapse element; 13-Support element; 14-Fixing bolt; 15-Connecting element.

[0036] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0040] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] See also Figures 1 to 4 The subsequent filling chamber filling body side wall anti-collapse system includes multiple anti-collapse devices. In the one-step mine chamber 1 and the two-step mine pillar 2 arranged horizontally in parallel, the roof 101 of the one-step mine chamber 1 is close to the side of the two-step mine chamber 2 and has multiple vertical mounting holes 102. The anti-collapse device includes an anti-collapse component 4 and a suspension support component. The head end of the anti-collapse component 4 is connected to the suspension support component, and the tail end of the anti-collapse component 4 passes through the mounting hole 102 and extends into the one-step mine chamber 1 along the length direction of the mounting hole 102. The suspension support component is arranged on the side of the roof 101 away from the one-step mine chamber 1 and is arranged corresponding to the mounting hole 102 to support the anti-collapse component 4 to be installed in the one-step mine chamber 1.

[0043] In the technical solution of the present invention, by setting the anti-collapse component 4 and the hanging support component, before mining the first-step mine room 1, a plurality of mounting holes 102 are drilled in the roof 101 of the first-step mine room 1, the anti-collapse component 4 is assembled and installed one-to-one in the mounting holes 102, and then the first-step mine room 1 is mined, and then the filling slurry is filled into the second-step mine room 1. After the filling slurry solidifies, the anti-collapse component 4 forms a skeleton on the side of the filling body close to the second-step mine room 2, thereby improving the strength of the side of the filling body close to the second-step pillar 2, and can effectively prevent the side of the filling body of the first-step mine room 1 from collapsing. In this embodiment, the mounting holes 102 are drilled in the roof 101 of the first-step mine room 1 before mining the first-step mine room 1. Of course, the mounting holes 102 can also be drilled in the roof 101 of the first-step mine room 1 after mining the first-step mine room 1.

[0044] Preferably, the anti-collapse component 4 includes a plurality of anti-collapse elements 12 for connecting in sequence and connecting elements 15 corresponding to the anti-collapse elements 12, wherein the head end of the anti-collapse element 12 is upward and the tail end of the anti-collapse element 12 is downward, and the connecting element 15 is used to connect the head end of one of the anti-collapse elements 12 with the tail end of the next anti-collapse element 12 to form the anti-collapse component 4, and the head end of the last anti-collapse element 12 is used to connect to the suspension support component. In this embodiment, the anti-collapse element 12 is a steel bar, the diameter of the anti-collapse element 12 ranges from 5 mm to 15 mm, and the length of the anti-collapse element 12 ranges from 3 m to 6 m.

[0045] Specifically, the diameter of the anti-collapse element 12 is preferably 10 mm, and the length of the anti-collapse element 12 is preferably 6 m.

[0046] Preferably, the connecting element 15 is a cylindrical structural member, and the connecting element 15 is used to be arranged along the length direction of the mounting hole 102. The connecting element 15 is formed with a through hole along its own length direction, and the upper section of the through hole is used to connect with the tail end of the corresponding anti-collapse element 12, and the lower section of the through hole is used to connect with the head end of the corresponding anti-collapse element 12. In this embodiment, the inner wall surface of the through hole is formed with an internal thread, and the outer wall surface of the upper end of the anti-collapse element 12 and the outer wall surface of the lower end of the anti-collapse element 12 are respectively formed with external threads for connecting with the internal threads.

[0047] Preferably, the suspension support component includes a support element 13 and a plurality of fixing bolts 14. The bottom end of the support element 13 is used to support the side of the roof 101 of the first-step mine room 1 away from the bottom plate of the first-step mine room 1, and the other end of the support element 13 extends away from the bottom plate of the first-step mine room 1. The outer wall of the support element 13 is surrounded by a fixing hole. The outer wall of the support element 13 is formed with threaded holes corresponding to the fixing bolts 14 along the radial direction of the fixing hole. The fixing bolts 14 are used to cooperate with the threaded holes to fix the head end of the anti-collapse component 4 to the support element. In this embodiment, there are four threaded holes, and the four threaded holes are evenly arranged around the central axis of the support element 13.

[0048] Preferably, the depth of the mounting hole 102 exceeds the roof height of the first-step mine room 1, and the mounting hole 102 is arranged vertically or inclined, with the deflection rate of the mounting hole 102 being less than 5%. Specifically, due to the different inclinations of the mined ore body, when the inclination of the mined ore body is greater than 55°, that is, the mined ore body is a steeply inclined ore body, the mounting hole 102 is arranged vertically. When the inclination of the mined ore body is less than or equal to 55°, that is, the mined ore body is an inclined ore body or a gently inclined ore body, the mounting hole 102 is arranged inclined, and the inclination angle of the mounting hole 102 is equal to the inclination angle of the mined ore body. In this embodiment, the deflection rate of the mounting hole 102 is 3%.

[0049] Specifically, when the mounting hole 102 is tilted, the part of the anti-collapse element 12 set inside the mounting hole 102 is tilted along with the mounting hole 102, and the part of the anti-collapse element 12 set outside the mounting hole 102 is vertically set. The construction workers need to bend the last anti-collapse element 12.

[0050] In addition, to achieve the above-mentioned purpose, the present invention also proposes a method for preventing the side walls of a filling body of a subsequent filling chamber from collapsing, which is used to fill the chamber using the aforementioned system for preventing the side walls of a filling body of a subsequent filling chamber. The method comprises the following steps:

[0051] Step S1: Before mining the first-step mine room 1, a drilling area is determined on the roof 101 of the first-step mine room 1, and a plurality of mounting holes 102 are drilled in the drilling area;

[0052] Step S2: After the mining of the mine room 1 is completed, the anti-collapse components 4 are assembled and installed in the installation holes 102 in a one-to-one correspondence;

[0053] Step S3: Prepare filling slurry, transport the filling slurry to the first step mine room 1 through the filling pipeline for filling, and after the filling body reaches the set strength, then mine the second step mine pillar 2. Specifically, before step S1, it also includes:

[0054] Step S4: expanding the mine access road 8 and the top of the mine trench 6 above the roof 101 of the mine room 1 to form a drill chamber 3, and supporting the drill chamber 3 with anchor rods and anchor nets;

[0055] Before step S2, the process further includes step S5: excavating a rock chamber 5 below the roof 101 of the first-stage mine room 1. A mine-discharging connecting road 9, a chute 10, and an upper-stage transport tunnel 11 are sequentially provided on the upper portion of the first-stage mine room 1. The drilled chamber 3 is connected to the mine-discharging connecting road 9. A bottom receiving trench 7 is also provided on the floor of the first-stage mine room 1.

[0056] Preferably, in step S1, the drilling area is a rectangular area on the side of the roof 101 of the first-stage chamber 1 facing the second-stage chamber 2. The drilling area is a rectangular area on the side of the interface between the first-stage chamber 1 and the second-stage pillar 2 facing the roof 101 of the first-stage chamber. The width of the drilling area ranges from 3m to 6m, and the density of the installation holes 102 drilled in the drilling area ranges from 0.5m×0.5m to 1.5m×1.5m. Under the same conditions, the greater the density of the installation holes 102 drilled in the drilling area, the greater the density of the installed anti-collapse components 4, the higher the strength of the filling body, and the better the anti-collapse effect. In this embodiment, the density of the installation holes 102 drilled in the drilling area is preferably 1.0m×1.0m, and the diameter of the installation holes 102 is preferably 50mm.

[0057] Based on the first embodiment of the present invention, in a second embodiment of the present invention, step S2 includes:

[0058] Step S21: The suspension support components are arranged in a one-to-one correspondence in the mounting holes 102 , and the fixing bolts 14 of the suspension support components are loosened.

[0059] Step S22: inserting the anti-collapse elements 12 into the mounting holes 102 in sequence through the fixing holes, and connecting the anti-collapse elements 12 in sequence with the connecting elements 15 to form the anti-collapse component 4;

[0060] Step S23: Tighten the fixing bolts 14 to fix the last anti-collapse element 12 to the suspension support component. Align the fixing holes of the suspension support component with the mounting holes 102 to position the suspension support components in a one-to-one correspondence with the mounting holes 102, so that the anti-collapse element 12 can pass through the fixing holes and into the mounting holes 102.

[0061] Based on the first embodiment of the present invention, in a third embodiment of the present invention, step S22 includes:

[0062] Step S221: Passing the tail end of one of the anti-collapse elements 12 through the fixing hole of the suspension support component, lowering the anti-collapse element 12 along the mounting hole 102, and then tightening the fixing bolt 14 to fix the anti-collapse element 12 to the suspension support component, so that the head end of the anti-collapse element 12 remains outside the suspension support component;

[0063] Step S222: Use the connecting element 15 to connect the tail end of the next anti-collapse element 12 with the head end of the anti-collapse element 12 in the previous step, loosen the fixing bolt 14, and continue to lower the connected anti-collapse elements 12 along the mounting hole 102, and then tighten the fixing bolt 14 to fix the anti-collapse element 12 in this step on the suspension support component, so that the head end of the anti-collapse element 12 in this step stays outside the suspension support component.

[0064] Step S223: Repeat step S222 until the tail end of the first anti-collapse element 12 contacts the floor of the mine room 1. In this embodiment, the length of the head end of the anti-collapse element 12 staying outside the suspension support component in step S222 is 1 m.

[0065] Based on the first embodiment of the present invention, in a fourth embodiment of the present invention, step S3 includes:

[0066] Step S31: the underflow and the concentrated water after the deep cone thickener are weighed by flow meters, the cement in the cement silo is weighed by a powder scale, and the underflow, concentrated water and cement are conveyed to a mixing drum for mixing to prepare the filling slurry;

[0067] Step S32: using a filling industrial pump to transport the filling slurry into the first-step mine room 1 through the filling pipe, first filling the surface of the first-step mine room 1 with the filling slurry, then filling the middle part of the first-step mine room 1, and finally filling and connecting the top;

[0068] Step S33: After the curing filling body reaches the set strength, the second-step pillar is mined.

[0069] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A subsequent filling chamber filling body side wall anti-collapse system, characterized in that: The invention comprises a plurality of anti-collapse devices, wherein in a first-step mine room and a second-step mine pillar arranged in parallel laterally, a plurality of vertical mounting holes are vertically formed on the side of the roof of the first-step mine room close to the second-step mine pillar, the anti-collapse device comprises an anti-collapse component and a suspension support component, the head end of the anti-collapse component is connected to the suspension support component, the tail end of the anti-collapse component passes through the mounting hole and extends into the first-step mine room along the length direction of the mounting hole, the suspension support component is arranged on a side of the roof away from the first-step mine room and is arranged corresponding to the mounting hole to support the anti-collapse component to be installed in the first-step mine room; The anti-collapse component includes a plurality of anti-collapse elements for being connected in sequence and connecting elements corresponding to the anti-collapse elements, wherein the head end of the anti-collapse element is upward and the tail end of the anti-collapse element is downward, and the connecting element is used to connect the head end of one of the anti-collapse elements and the tail end of the next anti-collapse element to form the anti-collapse component, and the head end of the last anti-collapse element is used to be connected to the suspension support component; The suspension support component includes a support element and a plurality of fixing bolts. The bottom end of the support element is used to support the side of a step mine room roof away from a step mine room floor. The other end of the support element extends away from a step mine room floor. The outer wall of the support element is surrounded by a fixing hole. The outer wall of the support element is formed with threaded holes corresponding to the fixing bolts along the radial direction of the fixing hole. The fixing bolts are used to cooperate with the threaded holes to fix the tail end of the anti-collapse component to the support element.

2. The subsequent filling chamber filling body side wall anti-collapse system according to claim 1 is characterized in that: The connecting element is a cylindrical structural part, which is used to be arranged along the length direction of the mounting hole. The connecting element has a through hole formed along its own length direction. The upper section of the through hole is used to connect with the tail end of the corresponding anti-collapse element, and the lower section of the through hole is used to connect with the head end of the corresponding anti-collapse element.

3. The subsequent filling chamber filling body side wall anti-collapse system according to claim 1 is characterized in that: The depth of the mounting hole exceeds the roof height of a mine room, the mounting hole is vertically arranged or inclined, and the deflection rate of the mounting hole is less than 5%.

4. A method for preventing the sidewall of a filling body of a subsequent filling chamber from collapsing, characterized in that: The method for filling a mine chamber according to the subsequent filling mine chamber filling body side anti-caving system according to any one of claims 1 to 3 comprises the following steps: Before mining a first-step mine chamber, a drilling area is determined on the roof of the first-step mine chamber, and a plurality of mounting holes are drilled in the drilling area; After the mining of the mine is completed in step 1, the anti-collapse components are assembled and installed in the mounting holes one by one; Prepare the filling slurry, transport the filling slurry to the first-step mine room through the filling pipeline for filling, and after the filling body reaches the set strength, the second-step mine pillar is mined.

5. The method for preventing side collapse of a filling body of a subsequent filling chamber according to claim 4, characterized in that: In the step of determining a drilling area on the roof of the first-step mine room and drilling a plurality of mounting holes in the drilling area, the drilling area is a rectangular area on the side of the interface between the first-step mine room and the second-step mine pillar facing the roof of the first-step mine room, the width of the drilling area ranges from 3m to 6m, and the density of drilling the mounting holes in the drilling area ranges from 0.5m×0.5m to 1.5m×1.5m.

6. The method for preventing side collapse of a filling body of a subsequent filling chamber according to claim 4, characterized in that: The anti-collapse component comprises a plurality of anti-collapse elements for being connected in sequence and a connecting element corresponding to the anti-collapse elements, the head end of the anti-collapse element facing upward, the tail end of the anti-collapse element facing downward, the connecting element being used to connect the head end of one of the anti-collapse elements and the tail end of the next anti-collapse element to form the anti-collapse component, the head end of the last anti-collapse element being used to be connected to the suspension support component, the suspension support component comprises a support element and a plurality of fixing bolts, the bottom end of the support element is used to support a side of a step mine room roof away from a step mine room floor, the other end of the support element extends away from a step mine room roof, the outer wall of the support element is surrounded to form a fixing hole, the outer wall of the support element is formed with a threaded hole corresponding to the fixing bolt along the radial direction of the fixing hole, and the fixing bolt is used to cooperate with the threaded hole to fix the tail end of the anti-collapse component to the support element; the steps of assembling the anti-collapse device and installing it one by one in the mounting hole include: Arrange the suspension support components in a one-to-one correspondence with the mounting holes, and loosen the fixing bolts of the suspension support components; Inserting the anti-collapse elements into the mounting holes in sequence through the fixing holes, and connecting the anti-collapse elements in sequence with the connecting elements to form the anti-collapse component; Tighten the fixing bolts to fix the last anti-collapse element to the suspension support component.

7. The method for preventing side slumping of a filling body of a subsequent filling chamber according to claim 6, wherein: The steps of sequentially inserting the anti-collapse elements into the mounting holes through the fixing holes and connecting the anti-collapse elements with the connecting elements to form the anti-collapse component include: Pass the tail end of one of the anti-collapse elements through the fixing hole of the suspension support component, lower the anti-collapse element along the mounting hole, and then tighten the fixing bolt to fix the anti-collapse element to the suspension support component so that the head end of the anti-collapse element remains outside the suspension support component; Use a connecting element to connect the tail end of the next anti-collapse element to the head end of the anti-collapse element in the previous step, loosen the fixing bolts, and continue to lower the connected anti-collapse elements along the mounting holes, then tighten the fixing bolts to fix the anti-collapse element in this step to the suspension support component, so that the head end of the anti-collapse element in this step stays outside the suspension support component; Repeat the steps of using the connecting element to connect the tail end of the next anti-collapse element with the head end of the anti-collapse element in the previous step, loosen the fixing bolts, and continue to lower the connected anti-collapse elements along the mounting holes, and then tighten the fixing bolts to fix the anti-collapse element in this step to the suspension support component so that the head end of the anti-collapse element in this step stays outside the suspension support component, until the tail end of the first anti-collapse element contacts the floor of the mine room in the first step.

8. The method for preventing side slumping of a filling body in a subsequent filling chamber according to claim 4, characterized in that: The steps of preparing the filling slurry, transporting the filling slurry to the first-step ore chamber through the filling pipeline for filling, curing the filling body to reach a set strength, and then mining the second-step ore pillar include: The underflow and the concentrated water after the deep cone thickener are weighed by flow meters respectively, the cement in the cement silo is weighed by a powder scale, and the underflow, concentrated water and cement are transported to a mixing drum for mixing to prepare the filling slurry; Use a filling industrial pump to transport the filling slurry to the first-step mine room through the filling pipe. First, fill the surface of the first-step mine room with the filling slurry, then fill the first-step mine room part, and finally fill and connect the top; After the curing filling body reaches the set strength, the second-step pillar is mined.

Images