Movable protective cover for mining tunneling operation

Abstract

The utility model relates to a mining tunneling operation mobile protective cover, which comprises a protective cover and two support frames, the two support frames stand on the ground in parallel, the protective cover is arranged at the top of the support frames, and two ends of the protective cover are respectively connected with the tops of the two support frames. Through the arrangement of the structure, the problem that the risk of injury to personnel and equipment caused by falling of pumice in a tunneling working face and a supporting working face in a poor rock condition or ground pressure display area is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of excavation operations, and specifically relates to a mobile protective cover for mining excavation operations. Background Art

[0002] At present, in underground mine excavation operations, pumice falls in the excavation working face and support working face in areas with poor rock conditions or ground pressure, especially in rock masses with developed joints and fissures. It is very easy for pumice to fall, causing damage to personnel and equipment, and posing certain safety risks. Therefore, there is an urgent need for a mobile protective cover for mine excavation operations to effectively solve the safety problem of pumice falling causing damage to personnel and equipment. Utility Model Content

[0003] The utility model provides a mobile protective cover for mining excavation operations, which reduces the risk of damage to personnel and equipment caused by falling floating stones in excavation working surfaces and supporting working surfaces in areas with poor rock conditions or where ground pressure is evident.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] The protective cover and the supporting frame are provided with two supporting frames, the two supporting frames are placed side by side on the ground, the protective cover is arranged on the top of the supporting frame, and the two ends of the protective cover are respectively connected with the top of the two supporting frames.

[0006] The beneficial effect of the utility model is that the protective cover is detachably mounted on the top of the support frame, so that the overall protective cover can be installed or removed at any time according to the working environment. The pumice falling from the working surface is blocked by the mesh surface of the protective cover, so that the pumice is blocked outside the mesh surface, which increases the time for the workers to evacuate the dangerous area. The risk of damage to personnel and equipment caused by the falling of pumice in the excavation working surface and the support working surface in the area with poor rock conditions or ground pressure is reduced.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the protective cover includes a main arch, a first horizontal rod and a protective net. The main arch has multiple main arches, which are arranged in parallel. The first horizontal rod horizontally connects the multiple main arches, and the first horizontal rod is connected to the middle parts of the multiple main arches. The protective net covers the main arch and the first horizontal rod.

[0009] The beneficial effect of adopting the above further scheme is that the protective cover uses multiple main arches arranged in parallel to form an arch surface, and the arch surface is fixed by a first horizontal rod. Finally, a protective net is covered on the arch surface, and the elastic effect of the protective net is used to effectively intercept floating stones and protect workers and equipment from being harmed.

[0010] Furthermore, the length of the protective net is equal to the length of the main arch, the width of the protective net is equal to the length of the first horizontal rod, and the mesh size of the protective net is 150*150mm.

[0011] The beneficial effect of adopting the above further solution is that the protective net is fully covered on the top of the main arch. At the same time, the mesh density of the protective net is 150*150mm, which can effectively intercept large pumice stones.

[0012] Furthermore, a protective net is welded and covers the main arch and the first horizontal rod.

[0013] The beneficial effect of adopting the above further solution is that the protective net is welded to cover the main arch and the first horizontal rod, which can ensure the strength of the protective cover and effectively intercept the falling pumice, so that the protective net will not deviate or fall while intercepting the pumice, thereby avoiding damage to workers or equipment caused by the deviation or falling of the protective net.

[0014] Furthermore, a hook is provided on the main arch.

[0015] The beneficial effect of adopting the above further solution is that a hook is provided on the main arch, and the wires can be hung on the hook to reduce the mess of wires on the ground, thereby avoiding damage to personnel or equipment caused by the mess of wires.

[0016] Furthermore, a lighting device is arranged on the hook.

[0017] The beneficial effect of adopting the above further solution is that a lighting device can also be arranged on the hook. The lighting device is placed on the top to enhance the lighting brightness of the work surface.

[0018] Furthermore, the support frame includes a vertical pole, a diagonal brace and a second horizontal pole. The vertical pole and the second horizontal pole are vertically cross-arranged, the diagonal brace is cross-arranged between the vertical pole and the second horizontal pole, the two ends of the diagonal brace are respectively connected to two second horizontal poles or two vertical poles, and the diagonal brace is connected to the vertical pole or the second horizontal pole at an angle.

[0019] The beneficial effect of adopting the above further solution is that a support frame is formed by the vertical pole, the second horizontal pole and the diagonal brace, and the support frame is fixed by the diagonal brace. A protective cover is installed on the top of the two support frames to form a detachable and movable protective cover, which can effectively intercept floating stones falling from the working surface.

[0020] Furthermore, both ends of the diagonal brace and the connection between the second horizontal rod and the vertical rod and the diagonal brace are provided with pin holes, and are fixed by passing pins through the pin holes.

[0021] The beneficial effect of adopting the above further solution is that the second horizontal rod and the vertical rod are fixedly connected by passing the through pin through the pin hole. At the same time, the support frame can be removed by taking out the through pin. The support frame can be installed or removed at any time according to the working environment. The safety of workers and equipment can be protected at any place.

[0022] Furthermore, an inner thread sleeve is provided at the cross connection of the two diagonal braces.

[0023] The beneficial effect of adopting the above further solution is that the intersection of the two diagonal braces is connected together through the inner thread sleeve, which plays a role in strengthening the support.

[0024] Furthermore, the size of the end of the main arch is smaller than the size of the top of the vertical pole, and the two ends of the main arch are connected to the top of the vertical pole by using a mortise and tenon structure.

[0025] The beneficial effect of adopting the above further scheme is that the end of the main arch and the top of the vertical pole are mortise and tenon structures, the top of the vertical pole is a thickened structure, the size of the end of the main arch is slightly smaller than the size of the top of the vertical pole, and when installing the protective cover, the three main arch ends need to be inserted into the top of the vertical pole at the same time, which ensures its own stability while enhancing its stability when impacted by gravel in the roadway. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a mobile protective cover for mining excavation operations according to the utility model;

[0027] Figure 2 It is a side schematic diagram of a mobile protective cover for mining excavation operations according to the utility model;

[0028] Figure 3 It is a front view schematic diagram of a mobile protective cover for mining excavation operation of the utility model;

[0029] Figure 4 The utility model is a top view of a mobile protective cover for mining excavation operations.

[0030] In the attached drawings, the components represented by the various reference numerals are listed as follows: 10 - protective cover; 11 - main arch; 12 - first horizontal rod; 13 - protective net; 14 - hook; 20 - support frame; 21 - vertical rod; 22 - diagonal brace; 23 - second horizontal rod. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] Example 1

[0033] like Figure 1-4As shown, the protective cover 10 and the support frame 20, the support frame 20 has two, the two support frames 20 stand side by side on the ground, the protective cover 10 is arranged on the top of the support frame 20, and the two ends of the protective cover 10 are respectively connected to the top of the two support frames 20.

[0034] Specifically, the protective cover 10 is detachably mounted on the top of the support frame 20, so that the overall protective cover 10 can be installed or removed at any time according to the working environment. The pumice falling from the working surface is blocked by the mesh surface of the protective cover 10, so that the pumice is blocked outside the mesh surface, which increases the time for the workers to evacuate the dangerous area. The risk of damage to personnel and equipment caused by the falling of pumice in the excavation working surface and the support working surface in the area with poor rock conditions or ground pressure is reduced.

[0035] like Figure 1-4 As shown, the protective cover 10 includes a main arch 11, a first horizontal rod 12 and a protective net 13. The main arch 11 has multiple main arches 11, and the multiple main arches 11 are arranged in parallel. The first horizontal rod 12 horizontally connects the multiple main arches 11, and the first horizontal rod 12 is connected to the middle parts of the multiple main arches 11. The protective net 13 covers the main arch 11 and the first horizontal rod 12.

[0036] Specifically, the protective cover 10 uses a plurality of main arches 11 arranged in parallel to form an arch surface, and uses a first horizontal rod 12 to fix the arch surface. Finally, a protective net 13 is covered on the arch surface, and the elastic effect of the protective net 13 is used to effectively intercept floating stones and protect the operators and equipment from being harmed. In this embodiment, the main arch 11 has three horizontal rods made of Q235 galvanized steel pipes, model DN50×5, and the main mechanical properties are as follows: yield strength: 235MPa; tensile strength: 375-460MPa; elongation 26%; impact energy: 27J.

[0037] like Figure 1-4 As shown, the length of the protection net 13 is equal to the length of the main arch 11, the width of the protection net 13 is equal to the length of the horizontal rod 12, and the mesh size of the protection net 13 is 150*150mm.

[0038] Specifically, the protective net 13 is fully covered on the top of the main arch 11. At the same time, the mesh size of the protective net 13 is 150*150mm, which can effectively intercept large pumice stones.

[0039] like Figure 1-4 As shown, the protection net 13 is welded and covers the main arch 11 and the first horizontal rod 12 .

[0040] Specifically, the protective net 13 is welded to cover the main arch 11 and the first horizontal rod 12, which can ensure the strength of the protective cover 10 and effectively intercept the falling pumice, so that the protective net 13 will not deviate or fall while intercepting the pumice, thereby avoiding damage to the staff or equipment caused by the deviation or falling of the protective net 13.

[0041] like Figure 1-4 As shown, a hook 14 is provided on the main arch 11 .

[0042] Specifically, a hook 14 is provided on the main arch 11. The wires can also be hung on the hook 14 to reduce the mess of wires on the ground, thereby avoiding damage to personnel or equipment caused by the mess of wires.

[0043] like Figure 1-4 As shown, a lighting device is provided on the hook 14 .

[0044] Specifically, a lighting device may also be provided on the hook 14. The lighting device is placed on the top to enhance the brightness of the work surface.

[0045] like Figure 1-4 As shown, the support frame 20 includes a vertical pole 21, a diagonal brace 22 and a second horizontal rod 23. The vertical pole 21 and the second horizontal rod 23 are vertically cross-arranged, the diagonal brace 22 is cross-arranged between the vertical pole 21 and the second horizontal rod 23, and the two ends of the diagonal brace 22 are respectively connected to two second horizontal rods 23 or two vertical poles 21, and the diagonal brace 22 is connected to the vertical pole 21 or the second horizontal rod 23 at an angle.

[0046] Specifically, a support frame 20 is formed by the vertical rod 21, the second horizontal rod 23 and the diagonal brace 22, and the support frame 20 is fixed by the diagonal brace 22. A protective cover 10 is installed on the top of the two support frames 20 to form a detachable and movable protective cover 10, which can effectively intercept floating stones falling from the working surface.

[0047] like Figure 1-4 As shown, both ends of the diagonal brace 22 and the connection between the second horizontal rod 23 and the vertical rod 21 and the diagonal brace 22 are provided with pin holes, and are fixed by passing pins through the pin holes.

[0048] Specifically, the second horizontal rod 23 and the vertical rod 21 are fixedly connected by passing the pin through the pin hole. At the same time, the support frame 20 can be removed by taking out the pin. The support frame 20 can be installed or removed at any time according to the working environment. The safety of the staff and equipment can be protected at any place.

[0049] like Figure 1-4 As shown, an inner thread sleeve is provided at the cross connection of the two diagonal braces 22 .

[0050] Specifically, the intersections of the two diagonal braces 22 are connected together through an inner thread sleeve to strengthen the support.

[0051] like Figure 1-4 As shown, the size of the end of the main arch 11 is smaller than the size of the top of the vertical pole 21, and the two ends of the main arch 11 are connected to the top of the vertical pole 21 by using a mortise and tenon structure.

[0052] Specifically, the end of the main arch 11 and the top of the vertical pole 21 are mortise and tenon structures, and the top of the vertical pole 21 is a thickened structure. The size of the end of the main arch 11 is slightly smaller than the size of the top of the vertical pole 21. When installing the protective cover 10, the ends of the three main arches 11 need to be inserted into the top of the vertical pole 21 at the same time, ensuring its own stability while enhancing its stability when impacted by gravel in the tunnel. In this embodiment, the ends of the three main arches 11 are respectively inserted into the tops of the six vertical poles 21. In this embodiment, the first horizontal rod 12 is made of Q235 galvanized steel pipe, model DN50×5, and the main mechanical properties are as follows: yield strength: 235MPa; tensile strength: 375-460MPa; elongation 26%; impact energy: 27J. In this embodiment, the three main arches 11, the vertical pole 21, the second horizontal rod 23, and the diagonal brace 22 are all made of Q235 grade steel pipe, with a cross-sectional area A=7.069cm 2 , steel pipe deadweight = 5.549Kg / m, rotation radius ix = 1.6cm, design strength value f = 215N / mm 2 , the total weight of the steel pipe = 5.549×3 = 16.647Kg, under the axial compression state, the maximum external pressure that the steel pipe can withstand P = 215×7.069×100 / 9.8-16.647 = 15491.87Kg = 15.492t, by checking the stability λ = μ×L / ix, taking μ = 1, λ = 1×3×100 / 1.6 = 188>150, the stability coefficient φ = 0.224, P = 0.224×15.492 = 3.47t, the flexibility coefficient of the single rod is greater than 150, and the reinforcement structure of the diagonal brace 22 is increased to improve the stability of the protective cover 10. The protective cover 10 and the vertical rod 21 and the second horizontal rod 23 can withstand the impact of 3.5t or less of collapsed floating stones during tunnel excavation.

[0053] The beneficial effect of this embodiment is that the protective cover 10 is detachably mounted on the top of the support frame 20, so that the overall protective cover can be installed or removed at any time according to the working environment. The pumice falling from the working surface is blocked by the mesh surface of the protective cover 10, so that the pumice is blocked outside the mesh surface, which increases the time for the workers to evacuate the dangerous area. The risk of damage to personnel and equipment caused by the falling of pumice in the excavation working surface and the support working surface in the area with poor rock conditions or ground pressure is reduced.

[0054] When the protective cover 10 is in use, the distance from the construction tunnel is small. It is mainly used for temporary protection of the broken section of the tunnel excavation, buffering, and preventing floating stones from falling and injuring personnel and equipment. When an accident occurs, personnel have enough time to evacuate the dangerous area. It should be noted that during the excavation of mine tunnels, accidents caused by top or side wall collapse due to improper excavation or support account for about 40% of mining accidents. This is mainly due to poor geological conditions in the mine, changes in ground pressure, and inadequate pumice treatment. The mobile protective cover 10 can effectively block and reduce the damage to personnel and equipment caused by pumice below 3.5t in the tunnel. According to the statistics of pumice injury accidents in mines in recent years, about 85% of the pumice in the accidents is less than 3.5t. The mobile protective cover 10 can effectively avoid most mine top or side wall collapse accidents.

[0055] The working process of this embodiment is as follows: when installing the protective cover 10, the ends of the three main arches 11 are simultaneously inserted into the top of the vertical pole 21, which ensures its own stability and enhances its stability when impacted by gravel in the roadway.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0061] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A mobile protective cover for mining excavation operations, characterized in that: The invention comprises a protective cover (10) and a support frame (20), wherein the support frame (20) has two members, the two support frames (20) are arranged side by side on the ground, the protective cover (10) is arranged on the top of the support frame (20), and the two ends of the protective cover (10) are respectively connected to the tops of the two support frames (20).

2. A mobile protective cover for mining excavation according to claim 1, characterized in that: The protective cover (10) comprises a main arch (11), a first horizontal rod (12) and a protective net (13); the main arch (11) has a plurality of main arches (11), the plurality of main arches (11) are arranged in parallel, the first horizontal rod (12) horizontally connects the plurality of main arches (11), and the first horizontal rod (12) is connected to the middle parts of the plurality of main arches (11); the protective net (13) covers the main arch (11) and the first horizontal rod (12).

3. A mobile protective cover for mining excavation according to claim 2, characterized in that: The length of the protective net (13) is equal to the length of the main arch (11), the width of the protective net (13) is equal to the length of the first horizontal rod (12), and the mesh size of the protective net (13) is 150*150mm.

4. A mobile protective cover (10) for mining excavation according to claim 2, characterized in that: The protective net (13) is welded to cover the main arch (11) and the first horizontal rod (12).

5. A mobile protective cover for mining excavation according to claim 2, characterized in that: The main arch (11) is provided with a hook (14).

6. A mobile protective cover for mining excavation according to claim 5, characterized in that: A lighting device is arranged on the hook (14).

7. A mobile protective cover for mining excavation according to claim 1, characterized in that: The support frame (20) comprises a vertical pole (21), an oblique brace (22) and a second horizontal pole (23); the vertical pole (21) and the second horizontal pole (23) are arranged vertically and crosswise; the oblique brace (22) is arranged crosswise between the vertical pole (21) and the second horizontal pole (23); two ends of the oblique brace (22) are respectively connected to two second horizontal poles (23) or two vertical poles (21); and the oblique brace (22) is connected to the vertical pole (21) or the second horizontal pole (23) at an angle.

8. A mobile protective cover for mining excavation according to claim 7, characterized in that: Both ends of the diagonal brace (22) and the connection between the second horizontal rod (23) and the vertical rod (21) and the diagonal brace (22) are provided with pin holes, and are fixed by passing pins through the pin holes.

9. A mobile protective cover for mining excavation according to claim 8, characterized in that: An inner thread sleeve is provided at the cross connection of the two diagonal braces (22).

10. A mobile protective cover for mining excavation according to claim 7, characterized in that: The size of the end of the main arch (11) is smaller than the size of the top of the vertical pole (21), and the two ends of the main arch (11) are connected to the top of the vertical pole (21) by using a mortise and tenon structure.

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