Ore pass mine collecting pit structure
By using piled-up fine ore to form an inverted truncated pyramid cavity structure and grid screen in the ore pass, combined with safety railings, the problems of high risk and high operating cost of replacing and installing steel lining plates were solved, and safe and reliable ore unloading and management were achieved.
Patent Information
- Application Number
- CN202520693775.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-14
AI Technical Summary
Replacing and installing steel liners in existing mine ore chutes is dangerous, difficult, increases operating costs, and complicates management.
The ore is piled up to form an inverted truncated quadrangular cavity structure, which is combined with grid screens and safety railings to guide the ore into the pass instead of steel lining plates, reducing the impact on the inner wall of the ore collection pit. The pile is also replenished by naturally compacted ore, which reduces operating costs.
It improves safety, reduces operating costs, simplifies management processes, and avoids the consumption of steel lining plates.
Smart Images
Figure CN223952671U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of well and roadway engineering, and particularly relates to a shaft collecting pit structure. BACKGROUND
[0002] In the underground mining process, the most commonly used ore drawing form is shaft ore drawing, which has the advantages of less transfer equipment, no need for lifting, convenient production management, large production capacity, less power and material consumption, etc., and is the throat passageway in the underground mining process.
[0003] At the present stage, the commonly used collecting pit shape is an inverted quadrangular prism, and in order to protect the inner wall of the collecting pit, prolong the service life of the collecting pit, and prevent the impact damage of the ore (waste) rock to the inner wall of the collecting pit when the mine car is unloaded, a steel lining plate needs to be embedded on the surface of the inner wall of the collecting pit after the concrete pouring of the collecting pit is completed. When the steel lining plate is replaced and installed, the staff work on the inclined surface, which has a high risk coefficient and large installation difficulty, and the consumption of the steel lining plate is large, the mine operation cost is increased, and the management difficulty is improved. SUMMARY
[0004] In view of the above technical problems, the utility model aims to provide a shaft collecting pit structure, which has the advantages of high safety, no consumption of steel lining plate, low operation cost and convenient management, and solves the problems of high risk coefficient and large installation difficulty when the steel lining plate is replaced and installed.
[0005] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:
[0006] A shaft collecting pit structure, comprising a collecting pit, wherein an inverted quadrangular prism cavity structure formed by piled ore fines is arranged in the collecting pit, and the opening at the bottom of the inverted quadrangular prism cavity structure and the opening at the top of the shaft are in communication with each other.
[0007] Further comprising a grizzly screen, which is arranged on the upper part of the collecting pit.
[0008] The upper part of the collecting pit is provided with safety guardrails on three sides, and the shaft is located at the central position of the bottom of the collecting pit.
[0009] The utility model has the advantages that the piled ore fines in the collecting pit replace the inverted quadrangular prism and the steel lining plate to guide the ore (waste) rock into the shaft, slow down the impact of the ore (waste) rock on the inner wall of the collecting pit, and the ore (waste) rock-embedded ore fines supplement the loss of the piled ore fines in the ore unloading process, which does not consume the steel lining plate compared with the traditional method, reduces the operation cost, and has the advantages of safety, reliability and convenient management. BRIEF DESCRIPTION OF DRAWINGS
[0010] The utility model will be further described below in combination with the drawings and examples:
[0011] Figure 1 is a three-dimensional structure schematic view of the utility model;
[0012] Figure 2 is a structure front view of the utility model;
[0013] Figure 3 is a structure side view of the utility model;
[0014] Figure 4 is a structure top view of the utility model.
[0015] Reference signs: lattice screen 1, safety guardrail 2, ore collecting pit 3, draw shaft 4, accumulated fine ore 5. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further explained in detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.
[0017] As shown in Figure 3 , an ore collecting pit and draw shaft structure comprises an ore collecting pit 3, the ore collecting pit 3 is provided with a reverse four-prism cavity structure formed by accumulated fine ore 5, and the bottom opening of the reverse four-prism cavity structure and the top opening of the draw shaft 4 are in communication with each other.
[0018] As shown in Figure 3 , it further comprises a lattice screen 1, and the lattice screen 1 is arranged on the upper portion of the ore collecting pit 3.
[0019] As shown in Figure 1 , Figure 3 , Figure 4 , the upper portion of the ore collecting pit 3 is provided with a safety guardrail 2 on three sides, and the draw shaft 4 is located at the central position of the bottom of the ore collecting pit 3.
[0020] The utility model discloses an ore collecting pit and draw shaft structure, which is characterized in that the lattice screen 1 is arranged on the upper portion of the ore collecting pit 3, the lattice screen 1 covers the entire ore collecting pit 3, the safety guardrail 1 is arranged on the opposite sides in the width direction and the ore unloading direction of the ore collecting pit 3, the ore collecting pit 3 is separated from the sidewalk, the ore collecting pit 3 is a cuboid as a whole, the length direction is parallel to the train operation line, the accumulated fine ore 5 in the ore collecting pit 3 is used to replace the reverse four-prism and the steel lining plate to guide the ore (waste) stone into the draw shaft 4, and the draw shaft 4 is located at the central position of the bottom of the ore collecting pit 3.
[0021] In the embodiment, the wellhead grizzly 1 is made of two layers of high-strength I-shaped steel arranged vertically and welded, is arranged obliquely in the collecting pit, and has an inclination angle of 15-30 degrees. The grizzly hole size should be greater than the qualified ore (waste) stone size. A sidewalk and a large ore (waste) stone treatment platform with a width of not less than 1.0 m are arranged on the two sides of the grizzly and on the side opposite to the ore unloading direction. The safety guard 2 is made of steel bars welded, and the height should be not less than 1.2 m. When the inverted section chute structure is used, the safety guard on the side opposite to the ore unloading direction needs to reserve a distance capable of meeting the ore drawing requirement of the previous section chute. The collecting pit has a rectangular cross section, the length of the collecting pit in the direction parallel to the mine car transportation line is defined as L, the length of the collecting pit in the direction perpendicular to the mine car transportation line is defined as B, the depth of the collecting pit is defined as H, and the diameter of the chute is defined as Φ,
[0022] L=δ1×L1
[0023] In the formula, L1 is the length of the mine car unloading device, and δ1 is the length coefficient of the collecting pit. In order to ensure that a train of mine cars can be unloaded completely, it is required that δ1≥1.
[0024] B=δ2×b
[0025] In the formula, b is the width of the mine car, and δ1 is the ore unloading coefficient. When the bottom-unloading mine car is used, it is required that δ1≥1-1.
[0026] H=1 / 2(B-Φ)tanβ0
[0027] In the formula, β0 is the powder ore accumulation angle in the collecting pit, and β0≥β, wherein β is the natural repose angle of the ore (waste) stone.
[0028] L×B×H≥V
[0029] In the formula, V is the volume of the ore (waste) stone transported by a train of mine cars.
[0030] When a train of mine (waste) stone loaded completely runs to the ore unloading point under the traction of the electric locomotive, the mine car will dump the ore (waste) stone into the grizzly 1 under the action of the unloading device. Then, the ore (waste) stone meeting the requirement (the large blocks that do not meet the requirement are crushed and then enter the grizzly 1) will pass through the grizzly hole of the grizzly 1 and enter the compacted accumulated powder ore 5 in the collecting groove 3. Finally, the compacted accumulated powder ore 5 is buffered and collected and then enters the chute 4, and the ore unloading is completed.
[0031] It should be understood that the above specific embodiments of the utility model are only used for example or explanation of the principle of the utility model, and do not constitute the limitation of the utility model. Therefore, any modification, equivalent replacement, improvement, etc. made without deviating from the spirit and scope of the utility model should be included in the protection scope of the utility model. In addition, the appended claims of the utility model are intended to cover all changes and modifications falling within the scope and boundary of the appended claims or the equivalent forms of such scope and boundary.
Claims
1. A shaft draw pit structure, characterized by, The application relates to a mine collecting pit (3), wherein a reverse quadrangular prism cavity structure formed by piled fine ores (5) is arranged in the mine collecting pit (3), and the bottom opening of the reverse quadrangular prism cavity structure is communicated with the top opening of a chute (4).
2. A drawbell stoping pit arrangement according to claim 1 wherein, The application further relates to a grizzly screen (1) arranged on the upper part of the mine collecting pit (3).
3. A drawbell stoping pit arrangement according to claim 1 wherein, The upper part of the mine collecting pit (3) is provided with a safety guardrail (2) on three sides, and the chute (4) is arranged at the bottom center of the mine collecting pit (3).