Method for applying a gasbag to an underground mine

Abstract

The application discloses an application method of a ground mining mountain filling air bag and relates to the technical field of safety control of ground mining mountain filling operation. The application method comprises the following steps: an anchor rod is arranged at a preset masonry position of a roadway; an air bag is connected to one side of the anchor rod away from the preset masonry position, and at least part of the air bag is in abutment with an inner wall of the roadway. According to the application scheme, the anchor rod is arranged at the preset masonry position of the roadway, the air bag is connected to the side of the anchor rod away from the masonry position, and at least part of the air bag is in abutment with the inner wall of the roadway, so that a flexible and inflatable temporary protective barrier can be quickly deployed before actual masonry operation of the retaining wall, the setting position of the original retaining wall does not need to be changed, and the dynamic protection of the high-risk area is realized without relying on the displacement of the masonry point to obtain a safety distance, and the safety of the operation personnel is ensured.

Description

Technical Field

[0001] This application relates to the field of safety control technology for backfilling operations in underground mines, and in particular to a method for applying a backfilling airbag in underground mines. Background Technology

[0002] In underground backfilling mine operations, the backfilling environment in the bottom structural area of ​​the stope is extremely complex and variable, and the retaining wall construction work is mainly concentrated in this area. This area is adjacent to the goaf and is affected by adverse geological conditions such as broken rocks in the on-site ore access road and damage to the eyebrow structure, which limits the actual construction space and makes it difficult to meet the required safe distance between the retaining wall and the goaf.

[0003] To prevent loose ore or gravel in the goaf from sliding down into the roadway under gravity or disturbance and affecting the safety of subsequent operations, retaining walls are usually constructed between the goaf and the working roadway in a timely manner to effectively seal and isolate the goaf. However, during the actual construction of the retaining walls, due to the poor stability of the surrounding rock near the goaf, local spalling or rockfalls often occur. The falling ore may not only directly impact the retaining wall structure under construction, causing deformation or collapse, but also seriously threaten the personal safety of on-site workers and the normal operation of construction equipment, greatly affecting the continuity and reliability of the retaining wall construction.

[0004] Currently, to mitigate this safety risk, the conventional practice is to move the retaining wall further back into the roadway (i.e., away from the empty area) to increase the physical distance between operators and the hazard. However, the location of the main haulage roadway is fixed, and its cross-sectional dimensions and spatial layout are determined by the overall mine design, leaving extremely limited space for adjusting the retaining wall's position. Excessively moving the retaining wall backward would not only encroach on the effective passageway cross-section, affecting the passage of ore-exporting vehicles and personnel, but could also lead to uneven diffusion of the backfill material, reduced filling efficiency, and even problems such as backfill material bypassing or leakage, ultimately impacting the overall filling quality and mining progress. Therefore, the retaining wall cannot be moved indefinitely towards the main roadway; existing methods present an irreconcilable contradiction between safety assurance and construction feasibility.

[0005] Therefore, how to provide a method for using airbags in mining operations that can ensure the safety of workers without changing the existing roadway layout and retaining wall settings is an urgent problem to be solved. Summary of the Invention

[0006] This application provides a method for applying an airbag in a mining mine, comprising: setting an anchor bolt at a predetermined masonry position in the roadway; connecting an airbag to the side of the anchor bolt away from the predetermined masonry position, and making at least a portion of the airbag abut against the inner wall of the roadway.

[0007] In some embodiments, the length of the airbag along the axial direction of the roadway is greater than or equal to 2m.

[0008] In some embodiments, the outer surface of the airbag is covered with an isolation layer located on the side of the airbag facing the empty area.

[0009] In some embodiments, setting the anchor bolts includes: controlling the first end of a plurality of anchor bolts to be anchored to the inner wall of the tunnel, and the second end of the anchor bolts to protrude from the inner wall of the tunnel.

[0010] In some embodiments, after connecting the airbag to the side of the anchor bolt away from the preset masonry position, the method further includes performing a mine backfilling operation: controlling the filling slurry to fill the empty area on the side of the airbag away from the retaining wall.

[0011] In some embodiments, the airbag is equipped with multiple pressure sensors to monitor pressure changes at various parts of the airbag.

[0012] In some embodiments, after the mine filling operation is performed, the method further includes: controlling the deflation of the airbag and removing the airbag from the roadway.

[0013] In some embodiments, the outer peripheral surface of the airbag is coated with a protective coating, which is a mixture of basalt fiber and polyurethane.

[0014] In some embodiments, performing mine backfilling operations further includes: adjusting the backfilling speed of the backfilling slurry based on the pressure monitoring values ​​of multiple pressure sensors; reducing the backfilling slurry conveying speed when the pressure monitoring value is greater than or equal to a first preset value; and increasing the backfilling slurry conveying speed when the pressure monitoring value is less than or equal to the first preset value.

[0015] In some embodiments, the main tunnel has multiple branch tunnels, and the projection of the branch tunnels in the vertical direction at least partially overlaps with the empty area, and the masonry location is located in the branch tunnel.

[0016] Compared to existing technologies, this application's solution, by setting anchor bolts at pre-designated masonry positions in the roadway and connecting airbags to the side away from the masonry work, with at least part of the airbags abutting against the roadway's inner wall, can quickly deploy a flexible, inflatable temporary protective barrier before actual retaining wall construction. After inflation, the airbags fit tightly against the roadway's surrounding rock, effectively sealing the space between the goaf and the work area, isolating potential rockfalls or spalling impacts from the upper goaf, and preventing falling ore from directly hitting workers and the retaining wall structure under construction, thus significantly improving operational safety during masonry. Simultaneously, this solution does not require changing the original retaining wall's location, nor does it rely on moving the masonry point backward to gain a safety distance, resolving the technical contradiction of limited retaining wall position adjustment due to the fixed space of the main roadway. Without encroaching on the roadway's cross-section, affecting ore transportation, or the diffusion of backfill material, it achieves dynamic protection of high-risk areas, ensuring the continuity of retaining wall construction and structural stability. Attached Figure Description

[0017] Figure 1 A flowchart illustrating an application method for filling airbags in underground mining, provided as an embodiment of this application; Figure 2 A schematic diagram showing the locations of roadways, empty areas, and retaining walls in a method for applying airbags in a mining mine, as provided in an embodiment of this application. Figure 3 This is a schematic diagram of the airbag installation position for an application method of filling airbags in a mining mine, provided in an embodiment of this application.

[0018] Figure label: 1. Main tunnel; 2. Branch tunnel; 3. Retaining wall; 4. Airbag; 5. Anchor bolt. Detailed Implementation

[0019] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0020] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0021] like Figure 2 and Figure 3As shown, in underground backfilling mining operations, the bottom structure area of ​​the stope is adjacent to the goaf. Affected by factors such as broken rocks and damaged ridge lines in the ore access road, the surrounding rock stability is poor. Rockfalls and spalling are prone to occur when constructing retaining wall 3, seriously threatening the safety of workers and affecting the construction quality of retaining wall 3. To ensure safety, the conventional practice is to move the position of retaining wall 3 back towards the inside of the roadway. However, since the position and cross-section of the main roadway 1 are fixed, the space for adjustment is limited. Excessive backfilling will encroach on the passage space, affect ore transportation, and may lead to uneven diffusion of the backfill or grout leakage, thereby affecting the backfilling effect and mining progress.

[0022] like Figure 1 As shown, in order to solve the above-mentioned technical problems, this application provides a method for applying an inflatable filling bag 4 in a mining mine, including: Step S1: Install anchor bolts 5 at the pre-designated masonry positions in the tunnel; In one possible scenario, the pre-designated location for the retaining wall 3 can refer to the designated position within the ore access roadway or bottom haulage roadway, according to the mine stope design, for constructing the filling retaining wall 3. This position can be located within approximately 2 meters of the connection between the cutting roadway, inclined roadway, or trench bottom haulage roadway and the main transport roadway. This location is close to the goaf, which is a cavity formed after the ore has been mined. Roadways are passageways in underground mines used for transportation, ventilation, personnel movement, and mining operations. The retaining wall 3 is a temporary or permanent wall structure constructed to seal the goaf. It can be constructed on the roadway cross-section using materials such as concrete, masonry, or prefabricated components to withstand the lateral pressure of the filling grout and effectively seal the goaf. In other words, the retaining wall 3 is set within the roadway cross-section, serving as a physical barrier between the goaf and the roadway.

[0023] To prevent rockfalls from the empty area, anchor bolts 5 are installed at pre-designated masonry positions in the tunnel to secure the airbags 4. The anchor bolts 5 are located on the side of the retaining wall 3 closest to the empty area, i.e., on the tunnel perimeter wall of the retaining wall 3 near the empty area. The anchor bolts 5 are installed as follows: multiple anchor bolts 5 are radially anchored to the inner perimeter wall of the tunnel, including the top, side, and bottom walls, with anchor holes drilled in each. The hole depth can be set according to actual needs, such as 0.3m, 0.5m, or 0.6m, to ensure the anchor bolts 5 penetrate deep into stable rock strata. The first end of multiple high-strength metal anchor bolts 5 is inserted into the anchor bolt 5 hole and anchored along its entire length or at the end using resin anchoring agent, ensuring a firm bond between the anchor bolts 5 and the surrounding rock, forming a stable support frame. The second end of the anchor bolt 5 protrudes from the rock surface and into the tunnel, with the exposed length set according to the airbag 4 installation requirements, ranging from 10cm to 50cm, to facilitate subsequent connection and fixation of the airbags 4. To strengthen the bond between the anchor bolt 5 and the inner wall of the roadway, the outer periphery of the section of the anchor bolt 5 inserted into the anchor hole can be threaded, or a barb can be installed on the outer periphery of the section.

[0024] The spacing between multiple anchor bolts 5 can be controlled within 1 meter, and can be increased according to the cross-sectional dimensions of the roadway and the degree of rock fragmentation, such as a spacing of 0.5 meters. For arched or rectangular cross-section roadways, anchor bolts can be reinforced at the top and upper sides of the roadway to protect against impacts from falling rocks from above and the sides. In addition, anchor bolts 5 can be tilted at a certain angle towards the goaf, such as 5° to 15°, to enhance the clamping force and impact resistance of the airbag 4, preventing it from dislodging or tearing when hit by falling rocks.

[0025] like Figure 3 As shown, step S2: Connect the airbag 4 to the side of the anchor bolt 5 away from the preset masonry position, and make at least a portion of the airbag 4 abut against the inner wall of the tunnel.

[0026] In one possible scenario, an airbag 4 is installed on the side of the anchor bolt 5 away from the pre-set masonry position, i.e., the side of the anchor bolt 5 facing the empty area. One side of the airbag 4 can be fixed to the support frame formed by the anchor bolt 5 using methods such as binding or clamping, and then inflated. Alternatively, the airbag 4 can be inflated first, and then one side of the airbag 4 can be fixed to the support frame formed by the anchor bolt 5 using methods such as binding or clamping. The airbag 4 can be made of high-strength, wear-resistant, and tear-resistant rubber or composite materials. The composite rubber can be made by mixing natural rubber and nitrile rubber in a mass ratio of 6:4. Reinforcing ribs can be provided on the inner wall of the airbag 4, with a density of 3-5 ribs per square meter, to improve the airbag 4's resistance to rock impact. The length of the airbag 4 along the circumferential direction of the tunnel is greater than or equal to 2 meters, and the radial cross-sectional shape of the tunnel matches the radial cross-section of the tunnel, such as being rectangular or arched, so that the inflated airbag 4 can fully conform to the tunnel roof, sides, and floor.

[0027] The airbag 4 can be inflated by an external inflation device. After inflation, it expands and unfolds, with at least a portion of it abutting against the inner wall of the tunnel. The inflation device can be an air compressor. Specifically, the following situations apply: After inflation, the airbag 4 fully expands, with its top in close contact with the tunnel roof, its sides in close contact with the tunnel side walls, and its bottom in close contact with the tunnel floor, forming a full-section closure; In cases of irregular surrounding rock or limited space, the airbag 4 fits against the tunnel roof and side walls; For arched tunnels, the airbag 4 mainly fits against the tunnel arch and upper side walls, forming an arch protection zone, primarily protecting against falling objects from above.

[0028] In addition, when the airbag 4 cannot be completely fitted to the inner wall of the roadway (e.g., due to uneven floor, roadway floor bulge, or airbag 4 being suspended at the bottom), an auxiliary support structure can be installed to pad and reinforce the airbag 4, ensuring its stable fit to the roadway contour and effectively blocking falling rocks from the goaf. The auxiliary support can take the following structural forms: using elastic materials such as rubber pads, polyurethane foam blocks, or waste tires as a padding layer, placed between the airbag 4 and the support structure. This fills the gaps, absorbs the impact energy of falling rocks, reduces stress concentration, and prevents localized damage to the airbag 4.

[0029] Compared to existing technologies, this application's solution, by setting anchor bolts 5 at pre-designated masonry positions in the roadway and connecting airbags 4 to their opposite sides, ensures that at least part of the airbags 4 are in contact with the inner wall of the roadway. This allows for rapid deployment of a flexible, inflatable temporary protective barrier before the actual masonry work on the retaining wall 3. After inflation, the airbags 4 tightly adhere to the surrounding rock of the roadway, effectively sealing the space between the goaf and the work area, isolating potential rockfalls or spalling impacts from the upper goaf, and preventing falling ore from directly impacting workers and the under-construction retaining wall 3 structure, thus significantly improving operational safety during masonry. Furthermore, this solution does not require changing the original location of the retaining wall 3, nor does it rely on moving the masonry point backward to gain a safety distance, resolving the technical contradiction of limited position adjustment for the retaining wall 3 due to the fixed space of the main roadway 1. Without encroaching on the roadway's cross-section, affecting ore transportation, or the diffusion of backfill material, it achieves dynamic protection of high-risk areas, ensuring the continuity of retaining wall 3 construction and structural stability.

[0030] like Figure 2 As shown, in some embodiments, the main tunnel 1 has multiple branch tunnels 11, and the projection of the branch tunnels 11 in the vertical direction at least partially overlaps with the empty area, and the masonry position is located in the branch tunnels 11.

[0031] In one possible scenario, the main roadway 1 has multiple branch roadways 11, such as ore access roads, inclined roadways, and bottom haulage roadways. The vertical projections of these branch roadways 11 at least partially overlap with the goaf, meaning that the branch roadways 11 are directly connected to or adjacent to the goaf formed by the ored body above or at their ends. In this type of structure, the retaining wall 3 can be constructed on the side of the branch roadway 11 closest to the goaf to seal the goaf, prevent backflow of filling slurry, and ensure the safety of subsequent ore extraction operations. However, due to the narrow space of the branch roadway 11 and its location at the end of the main roadway 1 extending into the stope, it is impossible to move the retaining wall 3 indefinitely backward towards the main roadway 1 to avoid the risk of falling rocks. If it is forcibly moved backward, it will not only encroach on the transportation space of the main roadway 1 and affect the passage of loaders and mine cars, but may also lead to uneven distribution of filling material, resulting in unfilled goafs or bypassing phenomena, seriously affecting the filling quality and mining safety.

[0032] With the main roadway 1 spatially fixed and the branch roadway 11 already at its end, traditional methods cannot achieve a safe distance by moving backward. However, this solution achieves in-situ active protection by setting up airbags 4, completely eliminating the dependence on spatial adjustment. It can be used safely in high-risk locations such as directly below the goaf and in areas where projections overlap, thus expanding the applicability of filling operations.

[0033] In some embodiments, the outer surface of the airbag 4 is covered with an isolation layer, which is located on the side of the airbag 4 facing the empty area.

[0034] In one possible scenario, the outer surface of the airbag 4 may be covered with an isolation layer. This isolation layer may be located on the side of the airbag 4 facing the empty area or may cover the entire outer surface of the airbag 4. The isolation layer may be lubricating oil or a release agent. Before installing the airbag 4, its outer surface should be cleaned to remove dust, oil, and other impurities, ensuring uniform adhesion of the lubricating layer. A brush, spray gun, or roller can be used to evenly apply a special release agent or lubricating oil to the outer surface of the airbag 4, focusing on areas that will subsequently come into contact with the filling slurry. The coating thickness can be 0.1mm to 0.5mm, such as 0.1mm, 0.25mm, or 0.5mm. Excessive thickness leads to dripping and waste, while insufficient thickness affects the isolation effect. Alternatively, a flexible film material can be heat-sealed or bonded to the outer surface of the airbag 4 before it leaves the factory as a permanent or semi-permanent isolation layer; or, before installing the airbag 4 on site, an independent plastic or composite film (such as high-density polyethylene film, low-density polyethylene film, or woven fabric composite film) can be wrapped, laid, and fixed to the surface of the airbag 4, and connected by cable ties, tape, or sewing to ensure seamless exposure. The isolation layer in this solution effectively isolates the airbag 4 from the filling slurry during the filling process, preventing the highly fluid, strongly alkaline cement-based or paste-like filling slurry from directly adhering to, penetrating, or sticking to the surface of the airbag 4. This avoids damage to the airbag 4 due to slurry solidification during deflation and removal, allowing it to be reused.

[0035] In some embodiments, after connecting the airbag 4 to the side of the anchor bolt 5 away from the preset masonry position, the mine filling operation is further performed: the filling slurry is controlled to fill the empty area on the side of the airbag 4 away from the retaining wall 3.

[0036] In one possible scenario, after connecting the airbag 4 to the side of the anchor bolt 5 away from the pre-set masonry position, before carrying out the mine backfilling operation, check whether the installed airbag 4 is fully inflated to ensure it is fully expanded and tightly fitted to the roadway roof, sides, and floor. Auxiliary supports can be used to compact any localized suspended areas to prevent slurry from flowing back into the roadway during the backfilling process. Then, extend the backfilling pipeline from the ground or backfilling station to the vicinity of the goaf, connecting it to the backfilling branch pipe of the target area via a three-way valve or branch pipe. The pipeline outlet is located on the side of the airbag 4 facing the goaf, i.e., the space between the airbag 4 and the goaf. Before formal backfilling, conduct a low-pressure water or mortar test to confirm the pipeline is unobstructed and unblocked, and test the system's pressure-bearing capacity. Afterward, start the backfilling pump and slowly inject the backfilling slurry. The types of slurry include, but are not limited to: graded tailings cementitious slurry, paste, or high-water materials. Control the initial flow rate to avoid high-speed slurry directly impacting the surface of the airbag 4 and causing localized stress concentration. The slurry is gradually advanced along the side of the airbag 4 facing the goaf, filling the mined-out space from bottom to top and from far to near, ensuring the filling body rises evenly and avoiding the formation of voids or segregation. Once it is confirmed that the goaf has been filled according to design requirements, indicated by slurry discharge from the overflow port or stable pressure, the filling pump is shut off, material supply is stopped, and the filling port is sealed promptly. During the slurry settling and solidification stage, curing is carried out for the appropriate time depending on the type of cementing material, such as cement or fly ash. After the filling body reaches the required solidification strength, a stable support structure is formed. After the filling slurry has solidified and reached the design strength, forming a stable filling body, the pressure is slowly released through the vent valve on the airbag 4, causing the airbag 4 to shrink and demold. Because the outer surface of the airbag 4 has an isolation layer, the slurry will not adhere to it, so it can be easily detached from the anchor bolt 5 or support structure and manually or mechanically dragged out along the roadway for recycling and reuse.

[0037] In traditional backfilling processes, to seal goaf areas, a solid retaining wall 3 needs to be constructed within the roadway cross-section. This wall itself occupies a certain amount of roadway space and cannot be recycled later. As a result, during subsequent backfilling operations, grout must be filled from behind the retaining wall 3 all the way to the design boundary, causing a certain degree of grout waste. This application, however, uses a detachable backfilling airbag 4, which functions equivalently to a temporary, recyclable flexible retaining wall 3. After the airbag 4 is installed and inflated, it occupies a portion of the roadway cross-section, effectively sealing the goaf. At this point, the backfilling operation only requires injecting grout into the side of the airbag 4 facing the goaf to fill the mined-out space within the goaf, without needing to fill the roadway cross-section area occupied by the airbag 4 itself, thus reducing the input of backfilling grout.

[0038] In some embodiments, the airbag 4 is equipped with multiple pressure sensors to monitor pressure changes at various parts of the airbag 4.

[0039] In one possible scenario, the airbag 4 may be equipped with multiple pressure sensors, which may be distributed and installed in multiple stress-bearing areas on the outer surface or internal cavity of the airbag 4, such as the top, sides, and bottom, which are prone to impact or compression. The pressure sensors are used to monitor in real time the pressure changes experienced by each area of ​​the airbag 4 during construction and filling, such as dynamic loads caused by impacts from falling rocks in empty areas or lateral thrust from the filling slurry.

[0040] The pressure sensor can transmit the pressure signal from each measuring point to the field control system in real time via wired or wireless means. The control system can be integrated into a computer to form a spatial pressure distribution map, which makes it easy for operators to grasp the overall stress state of the airbag 4.

[0041] The execution of mine backfilling operations also includes: adjusting the filling speed of the backfill slurry based on the pressure monitoring values ​​of multiple pressure sensors; reducing the slurry delivery speed when the pressure monitoring value is greater than or equal to a first preset value; and increasing the slurry delivery speed when the pressure monitoring value is less than or equal to the first preset value. The first preset value can be determined based on the material strength and structural design of the airbag 4, such as 80% to 90% of the rated working pressure of the airbag 4. When the monitoring value of any one or more pressure sensors is greater than or equal to the first preset value, it indicates that a local area is under high pressure, posing a risk of bulging, deformation, or even rupture. At this time, the control system integrated into the computer can automatically issue a speed reduction command to reduce the output flow of the backfilling pump, slow down the slurry delivery speed, and prevent the pressure from continuing to rise. When the pressure monitoring value falls below the first preset value and remains stable, it indicates that the current backfilling advance rate is within a safe range. The control system can gradually increase the slurry delivery speed to improve backfilling efficiency and shorten the operation cycle. The type of control system includes, but is not limited to, PLC control systems and DCS systems. The PLC control system may include an intrinsically safe PLC main unit, input / output modules, a power supply module, and a communication module; the DCS system includes multiple controllers connected via industrial Ethernet or fieldbus to form a distributed monitoring network. In this embodiment, the filling speed is dynamically adjusted based on the measurement values ​​of the pressure sensor to prevent the airbag 4 from being damaged by instantaneous high pressure, thus ensuring its sealing and integrity.

[0042] In some embodiments, the outer peripheral surface of the airbag 4 is coated with a protective coating, which is a mixture of basalt fiber and polyurethane.

[0043] In one possible scenario, to enhance the wear resistance, tear resistance, and durability of the airbag 4, especially under complex working conditions such as rockfall impacts in goaf areas, friction from surrounding rock in tunnels, and erosion from filling slurry, a high-performance protective coating can be applied to the outer surface of the airbag 4. Before coating, the outer surface of the airbag 4 should be cleaned to remove oil, dust, and release agent residue; alcohol or a specialized cleaning agent can be used for wiping. The basalt fiber and polyurethane mixture can be evenly applied to the outer surface of the airbag 4 using brushing, spraying, or dipping methods, with the coating thickness controlled between 0.5mm and 2.0mm. For impact-prone areas (such as the top and upper sides), a thicker coating can be applied locally. The coated airbag 4 should be placed in a constant temperature oven or a dedicated drying chamber and baked at 80℃–90℃ for a preset time, which can be 2–4 hours, to promote the cross-linking reaction of the polyurethane resin and complete curing. The protective coating can be a mixture of basalt fiber and polyurethane elastic material, possessing both elasticity and strength. The mass ratio of polyurethane elastic material to basalt fiber can be 80:20, which significantly improves the impact resistance, wear resistance and durability of the airbag surface while ensuring good flexibility and workability.

[0044] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0045] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0046] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0047] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A method for applying an air-filled bladder in a mining operation, characterized in that, include: Anchor bolts are installed at the pre-designated masonry locations in the tunnel; An airbag is connected to the side of the anchor bolt away from the preset masonry position, and at least a portion of the airbag abuts against the inner wall of the tunnel.

2. The application method of the inflatable filling bag in the underground mining industry according to claim 1, characterized in that, The length of the airbag along the axial direction of the tunnel is greater than or equal to 2m.

3. The application method of the air-filled airbag in underground mining according to claim 1, characterized in that, The outer surface of the airbag is covered with an isolation layer, which is located on the side of the airbag facing the empty area.

4. The application method of the inflatable filling bag in the underground mining industry according to claim 1, characterized in that, The installation of anchor bolts includes: The first end of each of the anchor bolts is anchored to the inner wall of the tunnel, and the second end of the anchor bolt protrudes from the inner wall of the tunnel.

5. The application method of the air-filled bladder in underground mining according to claim 1, characterized in that, After connecting the airbag to the side of the anchor bolt away from the preset masonry position, the method further includes: Perform mine backfilling operations: control the filling slurry to fill the void on the side of the airbag away from the retaining wall.

6. The application method of the inflatable filling bag in the underground mining industry according to claim 5, characterized in that, The airbag is equipped with multiple pressure sensors to monitor pressure changes at various parts of the airbag.

7. The application method of the inflatable filling bag in the underground mining industry according to claim 5, characterized in that, After the mine backfilling operation is performed, the following is also included: Control the deflation of the airbag and remove the airbag from the tunnel.

8. The application method of the inflatable filling bag in the underground mining industry according to claim 3, characterized in that, The outer peripheral surface of the airbag is coated with a protective coating, which is a mixture of basalt fiber and polyurethane.

9. The application method of the inflatable filling bag in the underground mining industry according to claim 6, characterized in that, The execution of the mine backfilling operation also includes: The filling speed of the filling slurry is adjusted based on the pressure monitoring values ​​of the multiple pressure sensors. When the pressure monitoring value is greater than or equal to the first preset value, the conveying speed of the filling slurry is reduced; When the pressure monitoring value is less than or equal to the first preset value, the conveying speed of the filling slurry is increased.

10. The application method of the air-filled bladder in underground mining according to claim 1, characterized in that, The main tunnel has multiple branch tunnels, and the vertical projection of the branch tunnels at least partially overlaps with the empty area, and the masonry position is located in the branch tunnel.

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