CN-122014339-A - Filling mine channel retaining wall and construction method thereof

Abstract

The invention provides a filling mine channel retaining wall and a construction method thereof, and relates to the technical field of underground mine subsequent filling. After the force application component, the stiffening strip, the reinforcement strip, the pressure sensor and the displacement sensor are arranged on the flexible template (geotechnical bag), the flexible template is arranged at the section of the roadway to be filled, slurry is filled into the flexible template through a grouting opening on the flexible template, and then the flexible template is maintained. The flexible template is designed into an integrated ladder-shaped structure and combined with the design of the surface stiffening strip, so that the gravity center of the retaining wall can be reduced, the bottom friction force is enhanced, the overall stability and the anti-overturning capacity are greatly improved, the pressure is applied to the retaining wall and dynamically regulated during maintenance by adopting a metal plate-piston hydraulic device and a servo control mechanism, and the leakage and the deformation are effectively prevented by matching with real-time monitoring of a sensor. The method is used for manufacturing the filling mine channel retaining wall with the advantages of simple structure, stable structure, high compressive strength and the like.

Inventors

• ZHANG RONGJUN
• Lai hanjiang
• ZHENG JUNJIE
• LI SHUAI
• LI FUXIU
• LIU SIJIE
• BAO SEN

Assignees

• 福州大学
• 武汉大学
• 龙岩市天山矿业有限公司

Dates

Publication Date

20260512

Application Date

20260112

Claims (10)

1. 1. A filled mine retaining wall comprising: The support main body is of a hierarchical structure, has the same overall shape as the section of the roadway and comprises an integrated flexible template and filling slurry filled in the integrated flexible template; The force application assembly is used for applying force to the support main body and comprises a fixing module and a piston member, wherein the fixing module comprises two fixing plates which are respectively arranged on two opposite side surfaces of the support main body, and the piston member is arranged between the two fixing plates of the fixing module.
2. 2. The filled mine retaining wall of claim 1, wherein the support body is stepped, the uppermost step of the support body has a length of 1-1.5 m, the difference in length between two adjacent steps is 1-2 m, and the height of each step is 0.8-1.2 m.
3. 3. The filled mine retaining wall of claim 1, wherein a plurality of reinforcement strips and stiffening strips are spaced apart from each other on the support body.
4. 4. The filling mine retaining wall of claim 1, wherein one of said retaining plates is disposed on a side of said support body that contacts a roadway section.
5. 5. The filling mine retaining wall according to claim 1, wherein a plurality of pressure sensors are provided on the fixing plate, and a plurality of displacement sensors are provided on the supporting body.
6. 6. The filled mine retaining wall of claim 1, wherein the thickness of the retaining plate is 50-100 mm a.
7. 7. The filled mine retaining wall of claim 3, wherein the stiffening strip has a width of 20-40 cm, the reinforcing strip has a width of 10-20 cm, and adjacent reinforcing strips are spaced from the stiffening strip by 30-40 cm.
8. 8. The infill-mine retaining wall of claim 1, wherein said piston member comprises a metal tube and an electro-hydraulic piston device.
9. 9. A method of constructing a filling mine retaining wall according to any one of claims 1 to 8, comprising the steps of: s1, after a force application component, a stiffening strip, a reinforcement strip, a pressure sensor and a displacement sensor are arranged on a flexible template, placing the flexible template at the section of a roadway to be filled, filling slurry into the flexible template through a grouting opening on the flexible template, and jointly forming a support main body by the slurry and the flexible template; s2, after grouting is completed, closing a grouting opening, and providing pressure for the supporting main body by means of the force application assembly so that the supporting main body is abutted against the section of the roadway; And S3, standing and maintaining to completely solidify the filling slurry, thus obtaining the filling mine channel retaining wall.
10. 10. The construction method according to claim 9, wherein in step S1, the slurry is injected at a rate of 0.5 to 1.0 m/h.

Description

Filling mine channel retaining wall and construction method thereof Technical Field The invention relates to the technical field of underground mine subsequent filling, in particular to a filling mine channel retaining wall and a construction method thereof. Background In order to improve mine production efficiency and solve the problem of tailing disposal, the filling mining method has been widely used for underground mining. The filling retaining wall is used as a key structure in the process, and has the functions of closing a goaf access, bearing the lateral pressure of filling slurry and guaranteeing the safety and the high efficiency of filling operation. The conventional filling retaining wall mainly comprises a light retaining wall, a gravity retaining wall, a layered bag type self-supporting filling retaining wall and the like, but has obvious limitations that the light retaining wall (such as a wood structure and other light material retaining walls) has the advantages of simple construction, short period and low comprehensive cost, the light retaining wall has insufficient overall strength and rigidity, is difficult to bear higher slurry pressure, is generally only suitable for small-section tunnels or low-pressure filling conditions, the gravity retaining wall (mainly comprising concrete, red bricks and block stone structures) has the advantages of stable structure and strong bearing capacity, is suitable for large-section and high-pressure filling working conditions, has the advantages that the masonry materials (such as concrete, masonry and the like) are required to be purchased externally, has high transportation cost in mines with wide tunnel distribution and limited working space, is difficult to realize mechanical construction, is mainly dependent on manual operation, and has low construction efficiency and long period, influences on overall mining progress, the layered bag type self-supporting filling retaining wall can be manufactured by filling bags by using filling materials, the filling mode has complicated process and low construction efficiency, and easy self-weight of the bags can be easily collapsed in time, and the hidden danger of safety and can not obviously leak in the process of maintenance. To sum up, the existing filling retaining wall is difficult to consider in terms of structural strength, material cost, construction efficiency and safety stability, and especially lacks a novel retaining wall structure which can not only meet the requirement of high-pressure filling with a large section, but also realize rapid mechanical construction, and is controllable in cost, safe and reliable. In view of the foregoing, there is a need for an improved filling mine retaining wall and method of constructing the same that addresses the above-described problems. Disclosure of Invention The invention aims to provide a filling mine channel retaining wall and a construction method thereof. To achieve the above object, in a first aspect, the present invention provides a filled mine path retaining wall, comprising: The support main body is of a hierarchical structure, has the same overall shape as the section of the roadway and comprises an integrated flexible template and filling slurry filled in the integrated flexible template; The force application assembly is used for applying force to the support main body and comprises a fixing module and a piston member, wherein the fixing module comprises two fixing plates which are respectively arranged on two opposite side surfaces of the support main body, and the piston member is arranged between the two fixing plates of the fixing module. Preferably, the supporting body is in a ladder shape, the length of the uppermost layer of the ladder is 1-1.5 m, the length difference of two adjacent layers of the ladder is 1-2 m, and the height of each layer of the ladder is 0.8-1.2 m. Preferably, a plurality of reinforcement strips and stiffening strips are arranged on the support main body at intervals. Preferably, one of the fixing plates is provided on a side surface of the support body which contacts a section of the roadway. Preferably, the fixing plate is provided with a plurality of pressure sensors, and the supporting body is provided with a plurality of displacement sensors. Preferably, the thickness of the fixing plate is 50-100 mm. Preferably, the stiffening strips have a width of 20-40 cm, the stiffening strips have a width of 10-20 cm, and adjacent stiffening strips are spaced from the stiffening strips by 30-40 cm. Preferably, the piston member comprises a metal tube and an electro-hydraulic piston device. In a second aspect, the present invention provides a method for constructing a filled mine retaining wall, comprising the steps of: S1, after a force application component, a stiffening strip, a reinforcement strip, a pressure sensor and a displacement sensor are arranged on a flexible template, placing the flexible template at the section