Mine underground temporary ventilation wall device

Abstract

The utility model relates to a mine underground temporary ventilation wall device, and relates to the technical field of mine construction. The mine underground temporary ventilation wall device comprises a supporting formwork layer, a slurry hanging layer and a sealing layer. The supporting formwork layer is rapidly set up through the anchor rods, the semi-round timber and the iron wires, the traditional steps of inner and outer formwork installation, steel bar binding and layered pouring are omitted, layer-by-layer pouring is not needed through one-time spraying forming of sprayed concrete, the construction period is greatly shortened, and the construction efficiency of the temporary ventilation wall ground is effectively improved. Meanwhile, the slurry hanging layer is composed of the wood laminates and the slurry hanging steel meshes, a traditional steel formwork and a traditional reinforcing mesh are replaced, the construction cost is effectively reduced, and the construction safety is high during dismantling.

Description

Technical Field

[0001] This application relates to the field of mining construction technology, and in particular to a temporary ventilation wall device for underground mines. Background Technology

[0002] In underground mining operations, ventilation walls are important ventilation and airtight structures, and their construction quality directly affects the safety and reliability of the mine ventilation system.

[0003] Traditional ventilation wall construction methods typically involve the following steps: First, an inner formwork is erected on one side of the tunnel using wooden or steel templates. Then, a steel reinforcement frame is laid out in a grid pattern on the outside of the inner formwork. Next, an outer formwork is set up on the outside of the steel reinforcement mesh, with the steel reinforcement mesh sandwiched between the inner and outer formwork. Then, concrete is mixed in a nearby area and poured into the formwork sandwich layer by layer, either manually or mechanically, with the outer formwork being raised layer by layer until the concrete fills the tunnel roof. Finally, any air leakage gaps at the interface between the ventilation wall and the tunnel are sealed with mortar or foam adhesive to meet the airtightness requirements.

[0004] However, the above-mentioned traditional ventilation wall construction has significant drawbacks: 1. Complex procedures: Due to the long time required for the construction of internal and external formwork, the binding of steel mesh and the layered pouring of concrete, the construction cycle of a single ventilation wall is long and the cost is high, which seriously restricts the efficiency of underground operations; 2. Prominent safety hazards: Traditional ventilation walls need to be demolished by blasting, and the flying rocks and dust generated during the blasting process can easily cause injury to construction workers. Utility Model Content

[0005] To address or partially address the problems existing in related technologies, this application provides a temporary ventilation wall device for underground mines, which enables rapid installation and dismantling of temporary ventilation walls, with low construction and dismantling costs and high construction safety during dismantling.

[0006] This application provides a temporary ventilation wall device for underground mines, comprising: a supporting template layer, a grouting layer, and a sealing layer;

[0007] The support template layer includes: several anchor rods and several semi-circular logs. The anchor rods are all fixedly installed in the side walls on both sides of the tunnel. The semi-circular logs are all placed vertically in the tunnel. The semi-circular logs are connected and fixed with each other by wire. The semi-circular logs located on both sides of the tunnel are connected and fixed to each anchor rod in the side wall of the tunnel by wire.

[0008] The grouting layer includes: a wooden board and a grouting steel mesh. The wooden board is fixedly installed on the plane of the semi-circular log, and the grouting steel mesh is fixedly installed on the outside of the wooden board. Each piece of grouting steel mesh is overlapped and connected, and the grouting steel mesh near the side wall of the tunnel is connected and fixed to each anchor rod in the side wall of the tunnel by wire.

[0009] The sealing layer is a concrete layer formed by spraying concrete.

[0010] Optionally, in some embodiments of this application:

[0011] The anchor bolt is equipped with a connecting ring at the top.

[0012] Optionally, in some embodiments of this application:

[0013] The semi-circular log has several connecting holes;

[0014] The wooden shelf has several fixing holes.

[0015] Optionally, in some embodiments of this application:

[0016] Several fixing rings are set on the wooden shelf.

[0017] Optionally, in some embodiments of this application:

[0018] The ratio of cement, sand, and crushed stone in this concrete layer is: cement:sand:crushed stone = 1:2:1.5;

[0019] The thickness of the sealing layer is at least 10 cm.

[0020] The technical solution provided in this application may include the following beneficial effects:

[0021] This application utilizes anchor bolts, semi-circular timber, and wire to quickly construct a supporting formwork layer, eliminating the need for traditional internal and external formwork installation, rebar tying, and layered pouring. Furthermore, by using shotcrete for one-time molding, the construction cycle is significantly shortened, effectively improving the efficiency of temporary windbreak construction. Simultaneously, this application uses wooden planks and mortar-coated steel mesh to form the mortar layer, replacing traditional steel formwork and rebar mesh, effectively reducing construction costs and enhancing safety during dismantling.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0023] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0024] Figure 1 This is a front view structural schematic diagram of a temporary ventilation wall device in an underground mine, as described in this application embodiment;

[0025] Figure 2This is a side view of a temporary ventilation wall device in an underground mine, as described in this application.

[0026] Figure 3 This is a schematic diagram of a semi-circular log in an embodiment of this application;

[0027] Figure 4 This is a structural schematic diagram of a wooden plywood in an embodiment of this application.

[0028] Reference numerals: 1-Support template layer, 101-Anchor rod, 1011-Connecting hanging ring, 102-Half-round log, 1021-Connecting hole, 2-Groove layer, 201-Wooden shelf, 2011-Fixing hole, 2012-Fixing hanging ring, 202-Groove steel mesh, 3-Sealing layer. Detailed Implementation

[0029] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0030] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] Traditional ventilation wall construction methods typically involve the following steps: First, an inner formwork is erected on one side of the tunnel using wooden or steel templates. Then, a steel reinforcement frame is laid out in a grid pattern on the outside of the inner formwork. Next, an outer formwork is set up on the outside of the steel reinforcement mesh, with the steel reinforcement mesh sandwiched between the inner and outer formwork. Then, concrete is mixed in a nearby area and poured into the formwork sandwich layer by layer, either manually or mechanically, with the outer formwork being raised layer by layer until the concrete fills the tunnel roof. Finally, any air leakage gaps at the interface between the ventilation wall and the tunnel are sealed with mortar or foam adhesive to meet the airtightness requirements.

[0034] However, the aforementioned traditional ventilation wall construction has significant drawbacks: 1. Complex procedures: Due to the time-consuming processes of erecting internal and external formwork, tying steel mesh, and pouring concrete in layers, the construction cycle of a single ventilation wall is long and costly, severely restricting the efficiency of underground operations; 2. Prominent safety hazards: Traditional ventilation walls require blasting for demolition, and the flying rocks and dust generated during the blasting process can easily cause injury to construction workers.

[0035] To address the aforementioned issues, this application provides a temporary ventilation wall device for underground mines, which enables rapid installation and dismantling of temporary ventilation walls with low construction and dismantling costs and high construction safety during dismantling.

[0036] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0037] Figure 1 This is a front view structural schematic diagram of a temporary ventilation wall device in an underground mine, as described in this application embodiment;

[0038] Figure 2 This is a side view of a temporary ventilation wall device in an underground mine, as described in this application.

[0039] Figure 3 This is a schematic diagram of a semi-circular log in an embodiment of this application;

[0040] Figure 4 This is a structural schematic diagram of a wooden plywood in an embodiment of this application.

[0041] See Figure 1-4A temporary ventilation wall device for underground mining includes: a supporting template layer 1, a grouting layer 2, and a sealing layer 3.

[0042] The support template layer 1 includes: several anchor rods 101 and several semi-circular logs 102. The anchor rods 101 are all fixedly installed in the side walls on both sides of the tunnel. The semi-circular logs 102 are all placed vertically in the tunnel. The semi-circular logs 102 are connected and fixed to each other by wire. The semi-circular logs 102 located on both sides of the tunnel are connected and fixed to each anchor rod 101 in the side wall of the tunnel by wire.

[0043] Specifically: The top of the anchor rod 101 is provided with a connecting ring 1011.

[0044] In this embodiment, one end of a double-stranded #8 iron wire is fixed to an anchor rod 101 on one side of the tunnel, and the other end is stretched straight and wrapped around three semi-circular logs 102 in sequence, extending to the anchor rod 101 on the other side of the tunnel and tightened, so that the semi-circular logs 102 stand firmly, forming the foundation of the support template layer 1. By setting a connecting hanging ring 1011, the connection between the anchor rod 101 and the iron wire can be facilitated, improving the setting efficiency of the support template layer 1.

[0045] The grouting layer 2 includes: a wooden board 201 and a grouting steel mesh 202. The wooden board 201 is fixedly installed on the plane of the semi-circular wood 102, and the grouting steel mesh 202 is fixedly installed on the outside of the wooden board 201. Each piece of grouting steel mesh 202 is overlapped and connected, and the grouting steel mesh 202 near the side wall of the tunnel is connected and fixed to each anchor rod 101 in the side wall of the tunnel by wire.

[0046] Specifically: the semi-circular wood 102 is provided with a number of connecting holes 1021; the wooden shelf 201 is provided with a number of fixing holes 2011.

[0047] In this embodiment, the wooden shelf 201 is placed against the semi-circular log 102, and an 8# iron wire is passed through the connecting hole 1021 and the fixing hole 2011 to fix the wooden shelf 201 to the semi-circular log 102. By providing the connecting hole 1021 and the fixing hole 2011, the wooden shelf 201 can be easily fixed to the semi-circular log 102, ensuring the stability of the installation.

[0048] Specifically, the wooden shelf 201 is provided with several fixing rings 2012. The fixing rings 2012 are fixed by self-tapping threads.

[0049] In this embodiment, a grouting steel mesh 202 is laid on the outer side of the wooden shelf 201 in one go. The grouting steel mesh 202 is tied together with 12# iron wire. The grouting steel mesh 202 near the side of the roadway is tied to the anchor bolt 101 with 12# iron wire. At the same time, the grouting steel mesh 202 is tied to the fixing ring 2012 with 12# iron wire, thus completing the laying of the grouting steel mesh 202 on the wooden shelf 201. By setting the fixing ring 2012, the grouting steel mesh 202 can be easily laid on the wooden shelf 201, improving the installation stability of the grouting steel mesh 202 and ensuring the completion of subsequent shotcrete construction.

[0050] The sealing layer 3 is a concrete layer formed by spraying concrete.

[0051] Specifically, the ratio of cement, sand, and crushed stone in this concrete layer is: cement:sand:crushed stone = 1:2:1.5;

[0052] The thickness of the sealing layer 3 is at least 10 cm.

[0053] In this embodiment, a shotcrete machine is used to spray concrete perpendicular to the steel mesh 202. The steel mesh 202 effectively prevents the shotcrete material from rebounding until the shotcrete thickness is ≥10cm. At this point, the shotcrete work is complete, and the temporary windbreak construction is finished. Through experimental comparison, the temporary windbreak construction in this embodiment, compared with traditional windbreak construction, shows that:

[0054]

[0055] In one embodiment, the temporary windbreak wall constructed according to this application is impacted by an LH203 loader with an impact energy of 4.5kJ. After three impacts, the wall disintegrates, with the largest fragment size being 12cm. This effectively achieves rapid installation and dismantling of the temporary windbreak wall, with low construction and dismantling costs and high construction safety during dismantling.

[0056] The technical solution provided in this application may include the following beneficial effects:

[0057] This application utilizes anchor bolts 101, semi-circular timbers 102, and wire to quickly construct the supporting formwork layer 1, eliminating the need for traditional internal and external formwork installation, rebar tying, and layered pouring. Furthermore, by using shotcrete for one-time molding, the construction cycle is significantly shortened, effectively improving the efficiency of temporary windbreak construction. Simultaneously, this application uses wooden planks 201 and mortar-coated steel mesh 202 to form the mortar-coated layer 2, replacing traditional steel formwork and rebar mesh, effectively reducing construction costs and enhancing safety during dismantling.

[0058] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations 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.

[0059] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A temporary ventilation wall device for underground mining, characterized in that, include: Supporting template layer (1), grouting layer (2) and sealing layer (3); The supporting template layer (1) includes: several anchor rods (101) and several semi-circular logs (102). The anchor rods (101) are all fixedly installed in the side walls on both sides of the roadway. The semi-circular logs (102) are all placed vertically in the roadway. Each semi-circular log (102) is connected and fixed with iron wire. The semi-circular logs (102) located on both sides of the roadway are connected and fixed with each anchor rod (101) in the side wall of the roadway through iron wire. The grouting layer (2) includes: a wooden board (201) and a grouting steel mesh (202). The wooden board (201) is fixedly installed on the plane of the semi-circular wood (102), and the grouting steel mesh (202) is fixedly installed on the outside of the wooden board (201). Each piece of grouting steel mesh (202) is overlapped and connected, and the grouting steel mesh (202) near the side wall of the roadway is connected and fixed to each anchor rod (101) in the side wall of the roadway by wire. The sealing layer (3) is a concrete layer formed by spraying concrete.

2. The temporary ventilation wall device for underground mining according to claim 1, characterized in that: The top of the anchor rod (101) is provided with a connecting ring (1011).

3. The temporary ventilation wall device for underground mining according to claim 2, characterized in that: The semi-circular wood (102) is provided with a number of connecting holes (1021). The wooden shelf (201) is provided with a number of fixing holes (2011).

4. The temporary ventilation wall device for underground mining according to claim 3, characterized in that: Several fixing rings (2012) are provided on the wooden shelf (201).

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