CN211874523U - A kind of coal mining protection coal pillar reinforcement structure - Google Patents

Abstract

The utility model relates to a coal pillar reinforcement structure for coal mining protection. The coal pillar faces the reinforcement body on the side surface, and the anchor rods are installed between the reinforcement bodies corresponding to both sides of the coal pillar. A spring is arranged between the first channel steel and the second channel steel. The utility model can actively apply a lateral restraint force to the protective coal pillar, improve the integrity of the protective coal pillar, and convert the protective coal pillar from a one-way stress state to a three-way force state. In the stress state, the strength of the coal pillar is improved and the stability is improved; the lateral deformation of the coal pillar is limited, the distribution of the structure can be adjusted according to the width and height of the coal pillar, and the lateral restraint force is actively applied to the protective coal pillar. , to improve the integrity of the protection coal pillar.

Description

A kind of coal mining protection coal pillar reinforcement structure

technical field

The utility model patent relates to the production field of coal mining technology, in particular to a coal mining protection coal pillar reinforcement structure.

Background technique

The deformation and damage of surrounding rock of coal mining roadway, and the poor stability of protecting coal pillar directly affect the propulsion efficiency of underground mining work, and increase the unsafe factor of underground mining work. The protection of the coal pillar needs to bear the influence of large support pressure and secondary mining, which makes the coal body loose and the distribution of cracks in some areas significantly increases the mining risk, and even personal casualties may occur in serious cases. The traditional roadway surrounding rock support technology has high cost and cannot solve the problem fundamentally. Therefore, its improvement and innovation are imperative.

Utility model content

In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present utility model is to provide a coal pillar reinforcement structure for coal mining protection, which effectively solves the problem of reducing the deformation of the roadway coal pillar.

The technical scheme solved by the utility model is:

A coal pillar reinforcement structure for coal mining protection, comprising a top plate, a bottom plate and a coal pillar connected between the top plate and the bottom plate. The longitudinal reinforcement structure, the transverse reinforcement structure and the longitudinal reinforcement structure are the same, and they all include reinforcements located on the surface of the side facing the coal pillar, and anchor rods are installed between the reinforcements corresponding to both sides of the coal pillar, and the reinforcements include the front of the mouth. For the first channel steel and the second channel steel that are slidably assembled together, a spring is installed between the first channel steel and the second channel steel, and the preload bolts and the preload nuts are used between the first channel steel and the second channel steel. connected together while compressing and preloading the spring between the first channel and the second channel.

Preferably, the side wall of the coal pillar is covered with an anchor net, and the reinforcement body is pressed and fixed on the outside of the anchor net.

Preferably, a plurality of first anchor rod perforations corresponding to the anchor rods are uniformly distributed on the first channel steel, and a plurality of second anchor rod perforations corresponding to the anchor rods are uniformly distributed on the second channel steel, The number of perforations of the first anchor rod and the perforations of the second anchor rod are equal and correspond one-to-one. After the first channel steel and the second channel steel are assembled, the corresponding perforations of the first anchor rod and the perforations of the second anchor rod are coaxial to form a reinforced anchor. Rod perforation, coal pillar perforations corresponding to the perforations of the reinforcement anchor rods are opened on the coal pillars, the anchor rods are placed in the perforations of the coal pillar anchor rods, and the two ends pass through the perforations of the reinforcement anchor rods on both sides. The anchor support plates at both ends of the anchor are pressed and fixed.

The utility model has the advantages of novel and unique structure, simple and reasonable structure, simple construction process and low cost, and can actively apply lateral restraint force to the protective coal pillar, improve the integrity of the protective coal pillar, and transform the protective coal pillar from a one-way stress state to a three-way force state. In the stress state, the strength of the coal pillar is improved and the stability is improved; the lateral deformation of the coal pillar is limited, the distribution of the structure can be adjusted according to the width and height of the coal pillar, and the lateral restraint force is actively applied to the protective coal pillar. , improve the integrity of the protective coal pillar, so the structure can reduce the volume of the protective coal pillar on the premise of maintaining the strength, improve the mining rate, and has greater economic benefits.

Description of drawings

Fig. 1 is the front view of the utility model.

Figure 2 is a cross-sectional side view of the utility model.

3 is a front view of the reinforcement body of the present invention and a cross-sectional side view of the perforation of the reinforcement body anchor rod (the anchor rod, spring and preload bolt are not installed).

4 is a front view of the reinforcement body of the present invention and a cross-sectional side view of the anchor rod.

FIG. 5 is a front view of the reinforcement body of the present invention and a cross-sectional side view of the pre-tightening bolt.

FIG. 6 is a front view of the second channel steel of the present utility model (installing the spring).

7 is a cross-sectional side view of the spring of the reinforcement body of the present invention.

Detailed ways

The specific embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

1-7, the utility model includes a top plate 1, a bottom plate 2 and a coal pillar 3 connected between the top plate and the bottom plate. A transverse reinforcement structure 4a and a longitudinal reinforcement structure 4b are provided. The transverse reinforcement structure 4a and the longitudinal reinforcement structure 4b have the same structure, and both include reinforcement bodies located on the face of the coal pillar 3 facing the side surface. Anchor rod 5, the reinforcing body includes a first channel steel 41 and a second channel steel 42 whose mouths are slidably assembled together, a spring 10 is installed between the first channel steel 41 and the second channel steel 42, and the first channel steel 41 and the second channel steel 42 The channel steel 41 and the second channel steel 42 are connected together by the preload bolt 9 and the preload nut 8, and the spring 10 between the first channel steel and the second channel steel is compressed and preloaded at the same time.

In order to ensure the use effect, the side wall of the coal pillar 3 is covered with an anchor net 7, and the reinforcement body is pressed and fixed on the outside of the anchor net.

The first channel steel 41 is uniformly distributed with a plurality of first anchor rod perforations 411 corresponding to the anchor rods, and the second channel steel 42 is uniformly distributed with a plurality of second anchor rod perforations 421 corresponding to the anchor rods. , the first anchor rod perforations 411 and the second anchor rod perforations 421 are equal in number and correspond one-to-one. After the first channel steel 41 and the second channel steel 42 are assembled, the corresponding first anchor rod perforations 411 and second anchor rod perforations 421 Coaxial, constitutes the perforation of the reinforced anchor rod, the coal pillar 3 is provided with the perforation of the pillar anchor rod 3a corresponding to the perforation of the reinforced anchor rod, the anchor rod 5 is placed in the perforation 3a of the coal pillar anchor rod, and the two ends are from both sides. The reinforced anchor rod is perforated, and is pressed and fixed by the anchor rod support plates 6 connected at both ends of the anchor rod.

Both ends of the first channel steel 41 are provided with first pre-tightening screw holes 412 corresponding to the pre-tightening bolts, and both ends of the second channel steel 42 are provided with second pre-tightening bolts corresponding to the pre-tightening bolts. Tighten the screw hole 422, after the first channel steel 41 and the second channel steel 42 are assembled, the first preload screw hole 412 and the second preload screw hole 422 on the corresponding side are coaxial, forming a preload screw hole, and the preload bolt 9 The pre-tightening nut 8 is screwed on the pre-tightening bolt extending out of the opposite channel steel to form the pre-tightening structure of the inner spring of the first channel steel and the second channel steel.

The length of the reinforcement body is greater than the width of the corresponding side coal pillar, and the pre-tightening screw perforation is located on the reinforcement body extending out of the two sides of the coal pillar, and its purpose is to avoid the coal pillar and prevent the pre-tightening bolt 9 or the pre-tightening nut 8. Destroy coal pillars.

There are multiple springs between the first channel steel 41 and the second channel steel 42, the compression direction of the spring is perpendicular to the length direction of the channel steel, and the inner wall of the first channel steel 41 is evenly distributed with a plurality of springs corresponding to one end of the spring. The first spring positioning column 413, the inner wall of the second channel steel 42 is evenly distributed with a plurality of second spring positioning columns 423 corresponding to the other end of the spring, the first spring positioning column 413 and the second spring positioning column 423 are equal in number and One-to-one correspondence, after the first channel steel 41 and the second channel steel 42 are assembled, the corresponding first spring positioning column 413 and the second spring positioning column 423 are coaxial, and the two ends of the spring are respectively sleeved on the corresponding first spring positioning column 413 and the second spring positioning column 423 constitute the positioning and limiting structure of the spring.

In the actual arrangement, it is arranged on the side where the longer side of the coal pillar section is located.

In the cross section of the coal pillar, when the length of the side where the lateral reinforcement structure 4a is located is greater than the length of the side where the longitudinal reinforcement structure 4b is located, the density of the transverse reinforcement structure 4a along the height direction is greater than the density of the longitudinal reinforcement structure 4b along the height direction. ;

In the cross section of the coal pillar, when the length of the side where the lateral reinforcement structure 4a is located is smaller than the length of the side where the longitudinal reinforcement structure 4b is located, the density of the transverse reinforcement structure 4a along the height direction is smaller than that of the longitudinal reinforcement structure 4b along the height direction. ;

As shown in Figures 1 and 2, the longitudinal reinforcement structure 4b is the side where the longer side is located, so its density is greater than that of the transverse reinforcement structure 4a, that is, in the cross section of the coal pillar, the side where the longer side is located is arranged The reinforced structure is denser, and the density gradually decreases from bottom to top. The reason is that the coal pillar is fragile and low in strength, and it is easy to collapse when it is supported. When the coal pillar is stressed, the coal pillar will lose its stability. , it is easy to fall in the direction of the narrower width, and it is often broken along the bottom, so the above-mentioned targeted arrangement is adopted.

When the utility model is used, the coal pillar anchor rod perforation 3a is firstly drilled on the coal pillar, then the anchor rod is inserted into the coal pillar anchor rod perforation 3a, the anchor net is hung on the side wall of the coal pillar, and the spring is installed in the first Between the first channel steel 41 and the second channel steel 42, the first channel steel 41 and the second channel steel 42 are pressed by the pre-tightening bolts 9 and the pre-tightening nut 8, the spring is pre-tightened, and then the reinforcement is respectively passed through The perforation of the solid bolt is installed on both sides of the bolt, and then it is pressed and fixed by the bolt support plate 6, and finally the preload bolt and the preload nut are removed. Since the spring is in a compressed state, the spring will follow the deformation of the coal pillar. The second channel steel is compressed, and external force is applied to the deformation of the coal pillar to reduce the deformation, thereby improving the strength of the coal pillar. At the same time, the coal pillar is stressed from the top plate and the bottom plate into three springs of the top plate, the bottom plate and the reinforcement body. The reinforced body, the anchor rod and the coal pillar are formed into a whole through the anchor net, which greatly improves the overall strength of the coal pillar, and simulates the state where the coal pillar is not excavated, that is, the three directions are stressed, so as to improve the mining efficiency. The empty area plays a very good supporting role. After using the coal pillar protection and reinforcement structure for coal mining of the present application, due to the increased strength, the volume of the coal pillar can be reduced, thus improving the mining rate of the coal mine, and its structure is novel and unique. , Simple and reasonable, the construction process is simple, and the cost is low. Compared with the traditional bolt reinforcement, grouting reinforcement, anchor cable reinforcement, and anchor net support, this structure can actively apply lateral restraint to the protection coal pillar, improve the protection of coal pillars. The integrity of the pillar makes the protection coal pillar change from a one-way stress state to a three-way stress state, the strength of the coal pillar is improved, and the stability is improved; the lateral deformation of the coal pillar is limited, and the width and height of the coal pillar can be adjusted according to Adjust and adjust the distribution of the structure, actively exert lateral restraint force on the protective coal pillar, and improve the integrity of the protective coal pillar. Therefore, the structure can reduce the volume of the protective coal pillar while maintaining the strength, improve the mining rate, and has greater economical benefits. benefit.

Claims (6)

1. A coal mining protection coal pillar reinforcing structure comprises a top plate (1), a bottom plate (2) and a coal pillar (3) connected between the top plate and the bottom plate, and is characterized in that a transverse reinforcing structure (4a) and a longitudinal reinforcing structure (4b) are arranged between two groups of opposite side surfaces of the coal pillar (3), the transverse reinforcing structure (4a) and the longitudinal reinforcing structure (4b) are identical in structure and respectively comprise reinforcing bodies located on the surfaces of the opposite side surfaces of the coal pillar (3), anchor rods (5) are arranged between the corresponding reinforcing bodies on two sides of the coal pillar, each reinforcing body comprises a first channel steel (41) and a second channel steel (42) which are assembled together in a sliding mode at the opening part, springs (10) are arranged between the first channel steel (41) and the second channel steel (42), and the first channel steel (41) and the second channel steel (42) are connected together through pretightening bolts (9) and pretightening nuts (8), and meanwhile, a spring (10) between the first channel steel and the second channel steel is compressed and pre-tightened.

2. The coal mining protection coal pillar reinforcement structure according to claim 1, characterized in that the side wall of the coal pillar (3) is covered with an anchor net (7), and the reinforcement body is fixed outside the anchor net in a pressing manner.

3. The coal mining protection pillar reinforcement structure of claim 1, a plurality of first anchor rod through holes (411) corresponding to the anchor rods are uniformly distributed on the first channel steel (41), a plurality of second anchor rod through holes (421) corresponding to the anchor rods are uniformly distributed on the second channel steel (42), the number of the first anchor rod through holes (411) is equal to that of the second anchor rod through holes (421), the first anchor rod through holes and the second anchor rod through holes are in one-to-one correspondence, after the first channel steel (41) and the second channel steel (42) are assembled, the corresponding first anchor rod through hole (411) and the second anchor rod through hole (421) are coaxial to form a reinforced anchor rod through hole, a coal pillar anchor rod through hole (3a) corresponding to the reinforced anchor rod through hole is formed in the coal pillar (3), the anchor rod (5) is arranged in the coal pillar anchor rod through hole (3a), two ends of the anchor rod penetrate out of the reinforced anchor rod through holes in the two sides, and the anchor rod supporting plates (6) connected to the two ends of the anchor rod are pressed and fixed.

4. The coal mining protection coal pillar reinforcing structure according to claim 1, wherein a first pre-tightening screw through hole (412) corresponding to a pre-tightening bolt is formed in each of two ends of the first channel steel (41), a second pre-tightening screw through hole (422) corresponding to the pre-tightening bolt is formed in each of two ends of the second channel steel (42), after the first channel steel (41) and the second channel steel (42) are assembled, the first pre-tightening screw through hole (412) and the second pre-tightening screw through hole (422) on the corresponding side are coaxial to form the pre-tightening screw through hole, the pre-tightening bolt (9) is arranged in the pre-tightening screw through hole in a penetrating mode, and the pre-tightening nut (8) is screwed on the pre-tightening bolt extending out of the channel steel on the opposite side to form the pre-tightening structure of the spring in the first channel steel and.

5. The coal mining protective pillar reinforcement structure as defined in claim 4, wherein the reinforcement body has a length greater than a width of a corresponding side pillar, and the pre-tightening screw penetration holes are formed in the reinforcement body extending from both side portions of the pillar.

6. The coal mining protective coal pillar reinforcement structure as claimed in claim 1, wherein a plurality of springs are arranged between the first channel steel (41) and the second channel steel (42), the compression direction of the springs is perpendicular to the length direction of the channel steel, a plurality of first spring positioning pillars (413) corresponding to one end of the springs are uniformly distributed on the inner wall of the first channel steel (41), a plurality of second spring positioning pillars (423) corresponding to the other end of the springs are uniformly distributed on the inner wall of the second channel steel (42), the first spring positioning pillars (413) and the second spring positioning pillars (423) are equal in number and correspond to each other one by one, after the first channel steel (41) and the second channel steel (42) are assembled, the corresponding first spring positioning pillars (413) and the second spring positioning pillars (423) are coaxial, and two ends of the springs are respectively sleeved on the corresponding first spring positioning pillars (413) and second spring positioning pillars (423), forming a positioning and limiting structure of the spring.

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