A charging platform to prevent ore from rolling off

Abstract

This utility model relates to the field of fan-shaped deep hole blasting, specifically to a charging platform for preventing ore from rolling down. The charging platform includes a platform body, and a trench for intercepting rolling rocks is provided between the platform body and the wall of the fan-shaped deep hole to be charged. The trench is formed by the side of the platform body closest to the hole wall and the hole wall together. This utility model, by constructing a physically isolated trench between the charging platform and the goaf, effectively blocks the rolling path of the rocks. The rolling rocks fall into the trench and cannot directly threaten the workers on the platform, thus reducing the safety hazard of injury from rolling rocks.

Description

Technical Field

[0001] This utility model relates to the field of fan-shaped deep hole blasting, specifically to a charging platform that prevents ore from rolling off. Background Technology

[0002] In underground mining operations, fan-shaped deep-hole blasting is a commonly used mining method. When loading explosives, workers usually need to stand on a loading platform adjacent to the goaf and load the explosives and detonating equipment into the blast holes above.

[0003] Existing methods for constructing loading platforms are typically quite simple: workers operate a loader to pile up ore or waste rock from the edge of the mining area (i.e., the entrance to the goaf) towards the back of the work area, forming a working platform about 5 meters long.

[0004] The charging platform constructed using this method has its side facing the goaf gently connected to the slope of the naturally accumulated ore pile within the goaf, forming a continuous slope. The main drawback is that when ore falls or slides down from above the goaf, these rocks will travel along the continuous ore pile slope, relying on their inertia and gravitational potential energy, directly impacting the charging platform where the workers are located, which can easily cause injuries and poses a serious safety hazard. Utility Model Content

[0005] The purpose of this invention is to provide a loading platform that prevents ore from rolling down, in order to solve the problem of how to effectively block the path of rolling stones and improve the safety of the loading platform.

[0006] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:

[0007] A loading platform for preventing ore from rolling off includes a platform body. Between the platform body and the wall of the fan-shaped deep hole to be loaded, there is a trench for intercepting rolling stones. The trench is formed by the wall of the platform body near the hole wall and the hole wall together.

[0008] Furthermore, the trench extends along the arc of the hole wall, forming an overall fan-shaped ring.

[0009] Furthermore, the cross-section of the trench is an inverted trapezoid.

[0010] Furthermore, the lower base of the trapezoid has a length of 0.4 meters to 0.6 meters and a height of 0.4 meters to 0.6 meters.

[0011] Furthermore, before constructing the platform body, the root of the borehole wall is pre-excavated inward, thereby shifting the ore pile slope line formed between the root of the borehole wall and the bottom wall of the rock drilling tunnel inward by 1 to 1.2 meters. The distance between the wall surface of the platform body on the side closest to the borehole wall and the shifted ore pile slope line is 0.4 to 0.6 meters.

[0012] Furthermore, the platform itself is constructed from piled-up ore.

[0013] In another embodiment, the edge of the platform body near the trench is made of stacked bags filled with ore, and the rest of the body is made of stacked ore.

[0014] Furthermore, the inner wall surface of the trench is covered with a fixing layer made of sprayed quick-drying concrete.

[0015] Furthermore, the platform body has several baffles on the side facing the fan-shaped deep hole to be loaded with the explosive. The trench is formed by the baffles and the hole wall together. The top of the baffle has a bent part that bends toward the fan-shaped deep hole.

[0016] Furthermore, a vertical insertion hole is formed below the bent portion, penetrating the baffle. The height of the insertion hole is higher than the top wall of the platform body. An insertion rod is provided in the insertion hole, and the two ends of the insertion rod contact the top wall of the platform body and the hole wall, respectively.

[0017] Compared with the prior art, this application has the following advantages:

[0018] The embodiments of this utility model effectively block the rolling path of the rolling stones by constructing a physically isolated trench between the charging platform and the goaf. The rolling stones will fall into the trench and cannot directly threaten the workers on the platform, thereby reducing the safety hazard of rolling stones injuring people. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a cross-sectional schematic diagram of a traditional propellant loading platform;

[0021] Figure 2 This is a cross-sectional schematic diagram of the first embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the second embodiment of the present invention;

[0023] The labels in the diagram represent the following:

[0024] 1-Drilling tunnel; 2-Platform body; 3-Gem chamber; 4-Ore heap; 5-Trenching trench; 6-Baffle. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] refer to Figure 1 The diagram shows a cross-sectional view of a traditional explosive loading platform. The platform body 2 is located inside the ore chamber 3 formed by the rock drilling tunnel 1. Deep inside the ore chamber 3, a slope formed by a ore pile 4 is formed. Workers carry out explosive loading operations on the platform body 2.

[0027] The side of the platform body 2 facing the goaf is gently connected to the slope of the naturally accumulated ore pile 4 in the goaf, forming a continuous slope. When ore falls or slides down above the goaf, these rocks will roll along the slope of the ore pile 4, relying on their inertia and gravitational potential energy, and directly rush up the platform body 2 where the workers are located.

[0028] (First embodiment)

[0029] refer to Figure 2 This embodiment aims to overcome the shortcomings of the prior art and provide a loading platform that can effectively block falling rocks in the goaf and ensure the safety of workers.

[0030] To achieve the above objectives, this embodiment provides a charging platform to prevent ore from rolling off, wherein a trench 5 is formed between the charging platform and the wall of the fan-shaped deep hole to be charged to intercept rolling stones.

[0031] Since the wall of the fan-shaped deep hole is fan-shaped, it is preferable that the trench 5 is constructed in a fan-ring shape along the arc of the opening of the fan-shaped deep hole to achieve effective protection for the entire working front.

[0032] As a preferred feature, the trench 5 is characterized in that it is not formed by excavation, but by piling up.

[0033] Specifically, the trench 5 is formed by: during the process of building a charging platform on the ground of the rock drilling tunnel 1, not piling up ore or piling up a small amount of ore at the location of the pre-set trench 5, and then piling up a large amount of ore at the location of the charging platform.

[0034] Furthermore, the specific steps for constructing trench 5 are as follows:

[0035] In the first construction step, a fan-shaped space with a depth of 1.0 to 1.2 meters is cleared or excavated inward (towards the goaf) in the bottom area of ​​the fan-shaped deep hole wall (the slope line of the ore pile formed between the root of the hole wall and the bottom wall of the rock drilling tunnel) using a loader, forming a secondary fan-shaped hole wall with a height of about 1 meter.

[0036] In step two, the loader is moved backward to transport the ore to the working face. A charging platform is built at a distance of 0.4 to 0.6 meters from the wall of the secondary fan-shaped hole, so that the slope of the charging platform and the wall of the secondary fan-shaped hole form a trench 5.

[0037] The advantage of this specific procedure is that by excavating a portion of the hole wall to the root, the distance between the charging platform and the charging position is avoided from increasing, thus reducing the difficulty of the charging operation.

[0038] Ultimately, during the construction of the loading platform, some of the gravel will roll down the slope of the loading platform toward the wall of the secondary fan-shaped hole. Therefore, the final trench 5 has an inverted trapezoidal cross-section with a base length of 0.4 to 0.6 meters and a height of 0.4 to 0.6 meters. This size design is sufficient to effectively intercept and accommodate common-sized rolling stones.

[0039] Preferably, to prevent the slope of the trench 5 (especially the slope composed of loose ore) from collapsing when impacted by rolling stones, at least one of the following reinforcement steps is also included:

[0040] The first reinforcement step is to spray quick-drying concrete onto the inner wall of trench 5 to form a temporary fixing layer.

[0041] Reinforcement Step Two: When constructing the edge of trench 5 near the loading platform, use woven bags filled with ore for stacking and reinforcement.

[0042] This embodiment has the following significant beneficial effects:

[0043] High safety: By constructing a physical isolation trench 5 between the charging platform and the goaf, the rolling path of the rolling rocks is effectively blocked. The rolling rocks will fall into the trench 5 and cannot directly threaten the workers on the platform, thereby reducing the safety hazard of rolling rocks injuring people.

[0044] Structural stability: By reinforcing the trench 5 with shotcrete or bagged ore, the stability of the trench 5 itself is ensured, preventing the trench 5 from collapsing and failing due to loose ore, and ensuring the long-lasting effectiveness of the protective function.

[0045] Low cost and locally sourced materials: This method mainly utilizes the ore and loader at the work site, with only a small amount of quick-drying concrete or woven bags required as additional materials. The cost is extremely low and it is easy to promote.

[0046] Simple construction and no impact on efficiency: The construction steps of this method are an optimization and improvement of the existing platform construction process. It is simple to operate, time-saving, and will not have a significant impact on the efficiency of the entire mining cycle.

[0047] (Second Embodiment)

[0048] refer to Figure 3 This embodiment aims to overcome the shortcomings of the second embodiment and provide a loading platform that can more effectively block falling rocks in the goaf, ensure the safety of workers, and facilitate workers to cross the trench 5 to carry out operations.

[0049] To achieve the above objectives, this embodiment provides a charging platform for preventing ore from rolling. A baffle 6 is formed between the charging platform and the wall of the fan-shaped deep hole to be charged to intercept rolling stones. A trench 5 for accommodating rolling stones is formed between the baffle 6 and the wall of the fan-shaped deep hole. The top of the baffle 6 is higher than the top of the platform body 2, and the top of the baffle 6 is provided with a bent portion 61 that bends towards the goaf (away from the platform body 2). The bent portion 61 is used to guide the rolling stones back to the hole wall and finally fall into the trench 5 when the rolling stones roll upward along the baffle 6.

[0050] The specific steps for constructing trench 5 and baffle 6 are as follows:

[0051] In the first construction step, a fan-shaped space with a depth of 1.0 to 1.2 meters is cleared or excavated inward (towards the goaf) in the bottom area of ​​the fan-shaped deep hole wall (the slope line of the ore pile formed between the root of the hole wall and the bottom wall of the rock drilling tunnel) using a loader, forming a secondary fan-shaped hole wall with a height of about 1 meter.

[0052] In step two, the loader is pulled back to transport the baffle 6 and ore to the working face. First, the baffle 6 is erected at a distance of 0.4 to 0.6 meters from the wall of the secondary fan-shaped hole, so that the baffle 6 is slightly tilted backward (away from the goaf). Then, the platform body 2 is built on the back of the baffle 6 using crushed stone.

[0053] After the platform body 2 is completed, a trench 5 is formed between the side of the baffle 6 closest to the goaf and the wall of the secondary fan-shaped hole.

[0054] Furthermore, a vertical through-hole is formed at the top of the baffle 6 (located below the bend 61). The height of the through-hole is higher than the top wall of the platform body 2. A matching rod 62 can be inserted into the through-hole. The two ends of the rod 62 contact the top wall of the platform body 2 and the hole wall of the goaf, respectively, thereby firmly fixing the baffle 6 in its current posture and making it less prone to shaking when impacted by rolling stones.

[0055] Furthermore, the insertion rod 62 forms a temporary foothold directly above the trench 5, allowing construction workers to approach the borehole wall and thus facilitate the installation of explosives.

[0056] The baffle 6 and the insert rod 62 can be removed before the explosion.

[0057] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of this utility model.

Claims

1. A loading platform for preventing ore from rolling off, characterized in that, It includes a platform body (2), and between the platform body (2) and the wall of the fan-shaped deep hole to be loaded with explosives, there is a trench (5) for intercepting rolling stones. The trench (5) is formed by the wall of the platform body (2) near the hole wall and the hole wall together.

2. The loading platform according to claim 1, characterized in that, The trench (5) extends along the arc of the hole wall and is in the shape of a fan ring.

3. The loading platform according to claim 2, characterized in that, The cross-section of the trench (5) is an inverted trapezoid.

4. The loading platform according to claim 3, characterized in that, The trapezoid has a base length of 0.4 meters to 0.6 meters and a height of 0.4 meters to 0.6 meters.

5. The loading platform according to any one of claims 1-4, characterized in that, Before the platform body (2) is constructed, the root of the borehole wall is pre-excavated inward, so that the ore pile slope line formed between the root of the borehole wall and the bottom wall of the rock drilling tunnel (1) is moved inward by 1 meter to 1.2 meters, and the distance between the wall surface of the platform body (2) near the borehole wall and the moved ore pile slope line is 0.4 meters to 0.6 meters.

6. The loading platform according to claim 1, characterized in that, The platform body (2) is made of ore.

7. The loading platform according to claim 1, characterized in that, The edge of the platform body (2) near the trench (5) is made of bags filled with ore, and the rest of the body is made of ore.

8. The loading platform according to claim 6 or 7, characterized in that, The inner wall surface of the trench (5) is covered with a fixed layer made of sprayed quick-drying concrete.

9. The loading platform according to claim 1, characterized in that, The platform body (2) has several baffles (6) on the side facing the fan-shaped deep hole to be loaded with the explosive. The trench (5) is formed by the baffles (6) and the hole wall together. The top of the baffle (6) is provided with a bent part (61) that bends toward the fan-shaped deep hole.

10. The loading platform according to claim 9, characterized in that, A vertical insertion hole is formed below the bent portion (61) that penetrates the baffle (6). The height of the insertion hole is higher than the top wall of the platform body (2). A rod (62) is provided in the insertion hole. The two ends of the rod (62) contact the top wall of the platform body (2) and the hole wall, respectively.

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