Filling sealing wall capable of monitoring and early warning
By installing displacement sensors and stress sensors on the filling and sealing wall, and observing the filling of the goaf area with the dehydrated steel pipe, the deformation leakage problem of the filling and sealing wall at the connection between the anchor and surrounding rock is solved, and safety warning and effective monitoring of the filling situation is achieved.
Patent Information
- Application Number
- CN202422050858.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-22
AI Technical Summary
When existing filling and sealed walls are under high pressure at the connection between anchors and surrounding rocks, there is a risk of deformation and leakage, and the filling conditions of goafs are difficult to predict, which often leads to the problem of destruction and leakage.
Design a filled enclosed wall that can monitor and early warning. By installing displacement sensors and stress sensors on the enclosed wall, the stress and deformation of the enclosed wall are monitored in real time, and the filling of the goaf is observed through dehydrated steel pipes to provide data support.
Real-time monitoring of the stress and deformation of the closed wall is realized, and safety warnings are issued in a timely manner to avoid deformation and slurry leakage problems. At the same time, the filling conditions of the goaf are verified through data, which improves the safety and efficiency of the filling process.
Smart Images
Figure CN222910067U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of underground mining and filling mining in metal mines, in particular to a filling and closing wall capable of monitoring and early warning. Background Art
[0002] Filling and sealing walls are an important process for the safe and efficient filling of goafs. Filling and sealing walls are mainly of two types: rigid (concrete type, masonry type) and flexible (wooden board type, crushed stone type, membrane bag type). The advantage of rigid sealing walls is that the walls are strong and not easy to be damaged. Flexible sealing walls have good dehydration ability, but the wall's pressure bearing capacity is limited. Both types of sealing walls are sealed by spraying grout after embedding anchor rods into the surrounding rock. When the connection between the anchor rods and the surrounding rock is under great pressure, there is a risk of deformation and leakage. At the same time, the filling situation of the goaf is generally understood through observation windows or by observing the dehydration pipe. Due to the inability to predict the mortar pressure, it often causes damage and leakage. Utility Model Content
[0003] In order to solve the above problems, the utility model aims to propose a monitoring and early warning filling closed wall. By arranging displacement sensors and stress sensors on the closed wall, the stress and deformation of the closed wall can be monitored to achieve the effect of safety early warning. At the same time, it can also verify the dewatered steel pipe to observe the filling condition of the goaf and provide data support.
[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:
[0005] A monitoring and early warning filling closed wall comprises a steel structure frame installed at the position to be filled in the goaf, two rows of threaded steel meshes are arranged inside the steel structure frame, and the two rows of threaded steel meshes are connected and fixed by tie rods; a displacement sensor is pre-buried on the outer side of the steel structure frame, a stress sensor is pre-buried on the inner side of the steel structure frame, a dehydration steel pipe is pre-buried and installed on the inner side of the steel structure frame, and a closed wall is cast inside the steel structure frame.
[0006] Furthermore, it also includes round steel, which is a plurality of round steels, one end of which is inserted into the surrounding rock and the other end is welded and fixed to the steel structure frame.
[0007] Furthermore, concrete supports are constructed on the outside of the closed wall.
[0008] Furthermore, the enclosed wall is made of C20 standard reinforced concrete.
[0009] Furthermore, the dehydration steel pipe is a DN80 dehydration steel pipe, and the DN80 dehydration steel pipe is provided with three different heights in the vertical direction which are respectively embedded in the closed wall.
[0010] Furthermore, there are three stress sensors, which are respectively at the same level as the three dehydration steel pipes and arranged in the middle of the closed wall.
[0011] Further, the dehydrating steel pipe penetrates through and extends out of the outer side of the closed wall, and half of the dehydrating steel pipe is located in the goaf.
[0012] Further, there are three displacement sensors, which are respectively arranged at positions 1.5 m away from the roadway floor on both sides of the closed wall and at the top position.
[0013] Beneficial effects: By arranging displacement sensors and stress sensors on the closed wall, the present utility model can monitor the stress and deformation conditions of the closed wall, achieving the effect of safety early warning. At the same time, it can also verify the filling situation of the goaf through the dehydrating steel pipe and provide data support. Description of the Drawings
[0014] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0015] Figure 1 is the front view of the fillable closed wall that can be monitored and pre-warned according to the embodiment of the present utility model;
[0016] Figure 2 is the side view of the fillable closed wall that can be monitored and pre-warned according to the embodiment of the present utility model;
[0017] Figure 3 is the top view of the fillable closed wall that can be monitored and pre-warned according to the embodiment of the present utility model;
[0018] Figure 4 is the schematic diagram of the dehydrating steel pipe of the fillable closed wall that can be monitored and pre-warned according to the embodiment of the present utility model. Detailed Embodiments
[0019] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.
[0020] The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.
[0021] Embodiment 1
[0022] See Figures 1-4 : A fillable closed wall that can be monitored and pre-warned, including a steel structure framework 7 installed at the position to be filled in the goaf. Two rows of ribbed steel meshes 1 are arranged inside the steel structure framework 7, and the two rows of ribbed steel meshes 1 are connected and fixed by tie bars 2; displacement sensors 9 are embedded on the outer side of the steel structure framework 7, stress sensors 8 are embedded on the inner side of the steel structure framework 7, dehydrating steel pipes 3 are embedded and installed on the inner side of the steel structure framework 7, and a closed wall 4 is cast inside the steel structure framework 7.
[0023] In this embodiment, displacement sensors and stress sensors are arranged on the closed wall to monitor the stress and deformation conditions of the closed wall, achieving the effect of safety warning. At the same time, it can also verify the filling situation of the goaf through the dehydration steel pipe and provide data support.
[0024] It should be noted that there are two rows of ribbed steel meshes in the closed wall of this embodiment. The diameter of the ribbed steel is 12 mm, and the spacing is 250 mm. The two rows of ribbed steel meshes are fixed with tie bars. The diameter of the tie bars is 6 mm, and the spacing is 500 mm.
[0025] In a specific example, it further includes round steel 6. There are several round steels 6. One end is inserted into the surrounding rock 10, and the other end is welded and fixed to the steel structure framework 7.
[0026] When constructing according to the designed closed wall thickness of 0.8 m, a certain number (not less than 10) of round steels (Φ30) can be fixed in the surrounding rock on both sides of the closed wall. The round steels are embedded 0.7 m into the surrounding rock, and the exposed part (0.3 m) of the round steels is welded and reinforced with the steel structure framework. Its function is to integrate the surrounding rock and the closed wall.
[0027] In a specific example, a concrete support 5 is constructed outside the closed wall 4.
[0028] It should be noted that in order to reduce the bearing capacity of the closed wall, a concrete support is constructed outside the closed wall. The concrete support adopts the C20 standard, with specifications: height 1.0 m, thickness 0.5 m, width 0.5 m. When the width of the closed wall is relatively large, two concrete supports can be constructed.
[0029] In a specific example, the closed wall 4 is made of C20 standard reinforced concrete.
[0030] The closed wall of this embodiment adopts C20 standard reinforced concrete, and its mix ratio is: 0.47:1:1.342:3.129 (water:cement:sand:stone). The sand ratio is 30%; the water-cement ratio is 0.47; the maximum particle size of the coarse aggregate is 20 mm.
[0031] In a specific example, the dehydration steel pipe 3 is a DN80 dehydration steel pipe. Three DN80 dehydration steel pipes are respectively embedded at different heights in the vertical direction of the closed wall 4.
[0032] It should be noted that the center of the topmost dehydration steel pipe is 0.5 m away from the roadway roof. The vertical distance between the second-layer dehydration steel pipe and the topmost dehydration steel pipe is 1 m. The vertical distance between the bottommost dehydration steel pipe and the second-layer dehydration steel pipe is 1 m. The horizontal position of each layer of dehydration steel pipe does not have strict requirements and can be determined according to the closed wall structure and on-site construction conditions.
[0033] In a specific example, there are three stress sensors 8, which are at the same level as the three dehydrating steel pipes 3 and are arranged at the middle position of the closed wall 4.
[0034] In a specific example, the dehydrating steel pipe 3 penetrates and extends out of the outer side of the closed wall 4, and half of the dehydrating steel pipe 3 is located in the goaf.
[0035] The length of the dehydrating steel pipe in this embodiment is 2 m, the diameter is 80 mm, the length of the dehydrating steel pipe on the goaf side is 1 m, holes with a diameter of 25 mm are drilled on the pipe body, arranged at intervals of 30 mm, 16 in each row, with a total of 8 rows, the bell mouth diameter is 150 mm, and the inclined length is 175 mm. The structure is as Figure 4 shown. The dehydrating steel pipes on the goaf side are wrapped with two layers of 100-mesh filter cloth and tied tightly with iron wire. The mouths of the dehydrating steel pipes on the outer side of the closed wall are also wrapped with two layers of 100-mesh filter cloth and tied tightly with iron wire.
[0036] In a specific example, there are three displacement sensors 9, which are respectively arranged at positions 1.5 m away from the roadway floor and at the top on both sides of the closed wall 4.
[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A monitoring and early warning filling and closing wall, characterized in that: The invention comprises a steel structure frame (7) installed at a position to be filled in a goaf, wherein two rows of threaded steel meshes (1) are arranged inside the steel structure frame (7), and the two rows of threaded steel meshes (1) are connected and fixed by tie bars (2); a displacement sensor (9) is pre-buried on the outer side of the steel structure frame (7), a stress sensor (8) is pre-buried on the inner side of the steel structure frame (7), a dehydration steel pipe (3) is pre-buried and installed inside the steel structure frame (7), and a closed wall (4) is cast inside the steel structure frame (7).
2. The monitorable and early warning filling and enclosing wall according to claim 1 is characterized in that: It also includes round steel (6), which consists of a plurality of round steels (6), one end of which is inserted into the surrounding rock (10) and the other end of which is welded and fixed to the steel structure frame (7).
3. The monitorable and early-warning filling and enclosed wall according to claim 1 is characterized in that: Concrete supports (5) are constructed on the outside of the closed wall (4).
4. The monitorable and early warning filling and enclosing wall according to claim 1 is characterized in that: The enclosed wall (4) is made of C20 standard reinforced concrete.
5. The monitorable and early warning filling and enclosing wall according to claim 1 is characterized in that: The dehydration steel pipe (3) is a DN80 dehydration steel pipe, and the DN80 dehydration steel pipe is provided with three different heights in the vertical direction which are respectively pre-buried in the closed wall (4).
6. The monitorable and early warning filling and enclosing wall according to claim 5 is characterized in that: There are three stress sensors (8), which are respectively located at the same level as the three dehydration steel pipes (3) and are arranged in the middle of the closed wall (4).
7. The monitorable and early warning filling and enclosing wall according to claim 1 is characterized in that: The dehydration steel pipe (3) passes through and extends out of the closed wall (4), and half of the dehydration steel pipe (3) is located in the goaf.
8. The monitorable and early warning filling and sealing wall according to claim 1 is characterized in that: There are three displacement sensors (9), which are arranged on both sides of the closed wall (4) at a distance of 1.5 m from the bottom plate of the tunnel and at the top.