A system for protecting the filling body along the roadway.

Abstract

This invention discloses a formwork protection system for roadway-side filling. Addressing the problems of existing single hydraulic prop formwork methods, such as high labor intensity, unreliable support, and inability to adapt to high filling masses, this system uses a hydraulic support assembly as the support foundation, combined with a modular formwork and a triangular support component consisting of horizontal braces and adjustable diagonal braces. During installation, the modular formwork is tightly fitted to the filling area, the horizontal braces provide support, and the adjustable diagonal braces are arranged at an angle to form a lateral pressure-resistant structure. During construction, the components are removed after the filling has initially set, and the hydraulic support is moved forward one step at a time for repeated operations. This invention eliminates the use of single props, reduces labor intensity, improves support reliability, and significantly reduces the bulging rate of the filling, making it particularly suitable for construction of filling masses over 4.5m in height.

Description

Technical Field

[0001] This invention relates to the field of coal mining equipment, specifically to a system for protecting the formwork of roadway side filling material in goaf-retention roadways. Background Technology

[0002] Goaf retention technology is a major development direction in pillarless mining technology, and goaf retention with side filling is one of its main forms. The construction of the side filling body is a crucial step. Previously, the formwork for the filling body mostly used individual hydraulic props, which has the following drawbacks: 1. A large number of individual hydraulic props are needed, resulting in high labor intensity for workers; when the filling height is high (above 4.5m), there are not enough individual hydraulic props to support them; 2. If the individual hydraulic props are not securely installed, lateral pressure during filling can cause them to bulge or even break; 3. Some coal mines have already stopped using individual hydraulic props, making it difficult to implement formwork using them. To address this, a mechanized and efficient formwork erection and protection method is needed to reduce the labor intensity of workers, improve the level of mechanization in construction, and ensure the quality of the formwork. Summary of the Invention

[0003] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a formwork protection system for roadway-side filling, which eliminates the use of individual support pillars, reduces labor intensity, improves support reliability, and significantly reduces the bulging rate of the filling. It is particularly suitable for construction of fillings with a height of 4.5m or more.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This invention provides a formwork protection system for roadway side filling bodies, comprising a hydraulic support assembly, a combined formwork, and several support components:

[0006] The hydraulic support assembly includes several unit supports symmetrically arranged on both sides of the filling body; the combined protective template includes a horizontal protective template attached to the front wall of the filling body and a side protective template attached to the side wall of the filling body.

[0007] The support assembly includes several horizontal braces and adjustable diagonal braces; both the unit support and the side protective template are provided with several layers of horizontal braces arranged vertically, and the adjustable diagonal braces are provided with several layers and arranged obliquely between the side protective template and the unit support.

[0008] One end of the adjustable diagonal brace is pressed against and fixed to the horizontal support rod of the side protective template, and the other end of the adjustable diagonal brace is pressed against and fixed to the unit bracket or the horizontal support rod of the unit bracket, so as to form a triangular stable support structure.

[0009] Preferably, the cross brace is made of steel pipe, the adjustable diagonal brace is a telescopic rod structure with adjustable length, and the two ends of the adjustable diagonal brace are provided with buckles that are adapted to the outer diameter of the cross brace.

[0010] Preferably, the combined protective template is made of steel plate with a thickness of ≥10mm, the height of the side protective template matches the design height of the filling body, and the width of the transverse protective template matches the width of the filling body.

[0011] Preferably, the unit supports are arranged at intervals along the direction of the roadway.

[0012] Preferably, the buckle is an angle steel, and the adjustable diagonal brace at the bottom is pressed against the support of the unit bracket by the angle steel. The horizontal support rod is fixed on the hydraulic cylinder of the unit bracket, and the adjustable diagonal brace at the top is pressed against the horizontal support rod by the angle steel.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. Utilize the existing hydraulic support groups (unit supports, rock retaining supports, and special transition frames at the ends) of the coal mining face as the support foundation to completely eliminate the heavy work of installing a large number of individual props and significantly reduce the labor intensity of workers.

[0015] 2. A triangular spatial support structure is formed by horizontal bracing rods and adjustable diagonal bracing, which rigidly supports the unit bracket and the combined protective template, effectively resisting the lateral pressure of filling and avoiding the problems of bulging and bag breaking caused by the easy expansion of traditional single pillars.

[0016] 3. The modular formwork and adjustable diagonal bracing design can accommodate filling heights of 4.5m and above, breaking through the height limitations of traditional single-pillar supports.

[0017] 4. This system can be reused as the hydraulic support moves forward, realizing a mechanized cycle of "formwork erection – filling – formwork removal – support relocation", improving construction efficiency by more than 50%. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a side-filling formwork protection system for a roadway retention tunnel provided in an embodiment of the present invention;

[0020] Figure 2 This is a layout diagram of the unit support provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the layout of the adjustable diagonal brace provided in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the adjustable diagonal brace provided in an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Unit support frame; 2. Horizontal head protection formwork; 3. Side protection formwork; 4. Horizontal brace; 5. Adjustable diagonal brace. Detailed Implementation

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

[0026] like Figures 1 to 4 As shown, a goaf-side backfill protection system includes a hydraulic support assembly, a combined protection formwork, and several support components.

[0027] The hydraulic support assembly includes several unit supports 1 symmetrically arranged on both sides of the filling body; the combined protective template includes a horizontal protective template 2 attached to the front wall of the filling body and a side protective template 3 attached to the side wall of the filling body.

[0028] The support assembly includes several horizontal bracing rods 4 and adjustable diagonal bracing 5; both the unit support 1 and the side protective template 3 are provided with several layers of horizontal bracing rods 4 arranged vertically, and the adjustable diagonal bracing 5 is provided with several layers and is inclinedly arranged between the side protective template 3 and the unit support 1.

[0029] One end of the adjustable diagonal brace 5 is pressed against and fixed to the horizontal support rod 4 of the side protective template 3, and the other end of the adjustable diagonal brace 5 is pressed against and fixed to the unit bracket 1 or the horizontal support rod 4 of the unit bracket, so as to form a triangular stable support structure.

[0030] In this embodiment, the cross brace 4 is made of steel pipe, the adjustable diagonal brace 5 is a telescopic rod structure with adjustable length, and the two ends of the adjustable diagonal brace 5 are provided with buckles that are adapted to the outer diameter of the cross brace 4.

[0031] In this embodiment, the combined protective template is made of steel plate with a thickness of ≥10mm. The height of the side protective template 3 matches the design height of the filling body, and the width of the transverse protective template 2 matches the width of the filling body.

[0032] In this embodiment, the hydraulic support group also includes a goaf retaining support and a special transition frame at the end. The goaf retaining support is arranged on the side of the backfill body near the goaf, and is a two-frame structure, which plays the role of retaining rock and supporting the roof. It is 500~800mm away from the backfill body. The special transition frame at the end replaces the original ordinary transition frame of the working face and is arranged at the end of the roadway side of the working face. The structure is a two-column shield + two-column rear shield to ensure that the roof of the backfill area can be supported in time. The number is generally 3~5 frames. The unit support 1 is arranged at intervals along the roadway direction.

[0033] In this embodiment, the buckle is an angle steel, and the adjustable diagonal brace 5 at the bottom is pressed against the support of the unit bracket by the angle steel. The horizontal support rod 4 is fixed on the hydraulic cylinder of the unit bracket, and the adjustable diagonal brace 5 at the top is pressed against the horizontal support rod 4 by the angle steel.

[0034] This embodiment also provides a method for using a formwork system for retaining filler along a roadway, including the following steps:

[0035] (a) As the working face advances, a filling space is formed behind the hydraulic support group, and filling bags are placed in the filling space;

[0036] (b) Attach the combined protective template tightly to the front and side walls of the filling area (filling bag), and then install the horizontal brace 4 and the adjustable diagonal brace 5 to form a support;

[0037] (c) Filling the filling bag with filling material;

[0038] (d) After the filling material has solidified, remove the combined protective formwork and support components;

[0039] (e) Move the hydraulic support assembly forward by one filling step and repeat steps (a)-(d) for cyclic operation.

[0040] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A gob-side entry retaining entry-side pack system, characterized by, Includes hydraulic support assemblies, modular protective formwork, and several support components: The hydraulic support assembly includes several unit supports (1) symmetrically arranged on both sides of the filling body; the combined protective template includes a horizontal protective template (2) attached to the front wall of the filling body and a side protective template (3) attached to the side wall of the filling body. The support assembly includes several horizontal bracing rods (4) and adjustable diagonal bracing (5); both the unit support (1) and the side protective template (3) are provided with several layers of horizontal bracing rods (4) arranged vertically, and the adjustable diagonal bracing (5) is provided with several layers and is arranged obliquely between the side protective template (3) and the unit support (1). One end of the adjustable diagonal brace (5) is pressed against and fixed to the horizontal support rod (4) of the side protective template (3), and the other end of the adjustable diagonal brace (5) is pressed against and fixed to the unit bracket (1) or the horizontal support rod (4) of the unit bracket, so as to form a triangular stable support structure.

2. The goaf-side filling body protection system according to claim 1, characterized in that: The cross brace (4) is made of steel pipe, and the adjustable diagonal brace (5) is a telescopic rod structure with adjustable length. Both ends of the adjustable diagonal brace (5) are provided with buckles that are adapted to the outer diameter of the cross brace (4).

3. A formwork system for roadway side filling as described in claim 1, characterized in that: The combined protective template is made of steel plate with a thickness of ≥10mm. The height of the side protective template (3) matches the design height of the filling body, and the width of the horizontal protective template (2) matches the width of the filling body.

4. A gob-side filling body protection system according to claim 1, characterized in that: The unit support (1) is arranged at intervals along the direction of the roadway.

5. A formwork protection system for roadway side filling bodies according to claim 2, characterized in that: The buckle is made of angle steel. The adjustable diagonal brace (5) at the bottom is pressed against the support of the unit bracket by the angle steel. The horizontal support rod (4) is fixed on the hydraulic cylinder of the unit bracket. The adjustable diagonal brace (5) at the top is pressed against the horizontal support rod (4) by the angle steel.

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