CN107269302A - A kind of self-locking tunnel top side suspension device - Google Patents

Abstract

The present invention relates to a kind of self-locking tunnel top side suspension device, including two high-strength steel strips and Duo Gen supporting bar assemblies, the high strength steel band is provided with the equidistant circular groove that is adapted with branch guard bar, and the circular groove of the two ends of the supporting bar assembly respectively with two high-strength steel strips is connected.The support system of the high-strength steel strip and supporting bar assembly composition supporting effect overall by both are played in the present invention, the region strengthening supporting that side produces stress concentration is pushed up to tunnel, prevents the deformation of top side.

Description

A self-locking roadway roof support device

technical field

The invention relates to the field of roadway support equipment, in particular to a self-locking roadway top side support device.

Background technique

my country is rich in coal resources, but for a long time, my country's extensive coal industry development model and large-scale mining activities have caused my country's coal mining to extend downward at a rate of 8-12 meters per year (10-20m in some areas). The surrounding rock pressure of the roadway is obviously severe, and the deformation of the roadway is intensified, especially for the deformation of the relatively large degree of fragmentation or weak surrounding rock. Therefore, the safe and efficient mining of coal resources is closely related to the roadway surrounding rock support technology.

Roadway surrounding rock support technology has a long history of development, especially in the past 50 years, experiments, measurements and researches in different forms and contents have been very active, and have been applied in roadway layout, roadway protection, roadway pressure relief and roadway support. Fruitful results have been achieved in various aspects such as monitoring and monitoring. Representative theories in foreign countries include classical pressure theory, slump arch theory, new Austrian method and energy support theory developed in the early 20th century. The achievements of domestic scholars include lithology transformation theory, combined support technology, loose circle theory, and soft rock engineering mechanical support theory. In the above support theory, the support resistance plays a decisive role in controlling the deformation and failure of the surrounding rock. Under the rated load condition, the higher the support resistance, the smaller the deformation of the surrounding rock.

In the design and planning of coal mine roadways, rectangular roadways are widely used. Due to the high degree of stress concentration at the top two corners of the rectangle, the deformation is very severe, resulting in a large deformation of the roof of the roadway. The research shows that due to the limitation of the narrow space on both sides of the roof of the rectangular roadway, the roadway surrounding rock control technologies such as anchor bolts and cables, anchor net spraying or U-shaped steel support cannot provide sufficient support for solving the problem of large deformation of the roadway roof. support resistance. However, by increasing the density of the anchor rod and the strength of the rod body, the support material is seriously wasted.

To sum up, during the deformation and failure process of the roadway, the deformation of the roof is the most severe. The existing support technology cannot provide sufficient support resistance and has limited effect on strengthening the roof.

Contents of the invention

The technical problem to be solved by the present invention is to provide a self-locking roadway support rod aiming at the deficiencies of the prior art.

The technical scheme that the present invention solves the problems of the technologies described above is as follows:

The invention provides a roadway roof support device, which includes two high-strength steel belts and multiple support rod assemblies. The high-strength steel belts are provided with circular grooves matching the support rod assemblies. Both ends of the support rod assembly are respectively connected with circular grooves of two high-strength steel strips.

The beneficial effects of the present invention are: the roadway roof support device of the present invention can connect several self-locking support rod assemblies with two high-strength steel belts to form a support whole, so that multiple rods can play an integrated support role. To improve the protection effect, strengthen the support in the area where the stress concentration occurs in the surrounding rock of the roadway to prevent the deformation of the roof.

Further, the support rod includes a first rod body and a second rod body, and one end of the first rod body is connected to one end of the second rod body through a self-locking thread.

Further, the first rod body includes a first rod body and a threaded connection section, the first rod body and the threaded connection section are integrally formed, and the threaded connection section is provided with external threads.

Further, the second rod body includes a second rod body and a threaded connection pipe, the second rod body and the threaded connection pipe are integrally formed, and the threaded connection pipe is provided with an internal thread matching the external thread.

The beneficial effect of the above further scheme is that: through the twisting of the first rod and the second rod, the length of the support rod can be adjusted, which can be applied to roadway support of different widths; No matter how much pressure is exerted on both ends of the protection rod, the support rod will not undergo axial compression deformation, so as to realize the support and reinforcement of the roof of the roadway.

Further, the depth of the external thread is 0.1-0.15 times the diameter of the threaded connection section.

Further, the angle α between the tangent of the external thread and the plane perpendicular to the axis of the first rod body is 5 to 30°

Further, a metal mesh layer is included, and the metal mesh layer is wrapped around the outside of the first rod body and the second rod body.

Further, the metal mesh layer is made of elastic steel wire or elastic copper wire, and the metal mesh layer is elastic.

Further, it also includes an anti-corrosion layer, the anti-corrosion layer is sheathed on the outside of the metal mesh layer, the anti-corrosion layer is made of rubber or latex, and the anti-corrosion layer is closely attached to the metal mesh layer.

Further, the plurality of circular grooves are equally spaced on the high-strength steel strip.

Further, the diameter of the circular groove on the high-strength steel strip is equal to the outer diameter of the support rod assembly.

The beneficial effect of the above further solution is that the equidistant circular grooves cooperate with the support rod assembly, which can ensure the uniform distribution of force, thereby better supporting the roadway.

Description of drawings

Fig. 1 is the structural representation of roadway top side supporting device of the present invention;

Fig. 2 is the structural representation of support bar assembly of the present invention;

Fig. 3 is an enlarged view of part A of Fig. 2;

Fig. 4 is the sectional structure schematic diagram of support bar assembly of the present invention

Fig. 5 is the structural representation of high-strength steel band of the present invention;

Fig. 6 is a schematic diagram of the structure of the metal mesh layer of the present invention.

detailed description

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

As shown in Figure 1, the present invention provides a roadway roof support device, which includes two high-strength steel belts 5 and multiple support rod assemblies, and the high-strength steel belts 5 are equipped with A suitable circular groove 51 , the two ends of the support rod assembly are respectively connected with the circular grooves 51 of two high-strength steel strips 5 . In the roadway roof support device of the present invention, the high-strength steel belt and the support rod assembly are formed into a support body to strengthen the support for the area where stress concentration occurs in the surrounding rock of the roadway to prevent deformation of the roof. The high-strength steel belt can be lifted from above Buy direct for convenience and durability.

As shown in FIG. 2 , the support rod assembly includes a first rod body 1 and a second rod body 2 , and one end of the first rod body 1 and one end of the second rod body 2 are connected by threaded self-locking. As shown in Figure 3, the self-locking phenomenon means that if the line of action of the resultant force F of the active force acting on the object is within the friction angle α (the tangent value of the friction angle α is equal to the friction coefficient of the material, that is, tanα=f, f is material friction coefficient.), then no matter how great this force is, there is always a fully restrained reaction force F' to balance it, and the object remains stationary; on the contrary, if the line of action of the resultant force F of the active force is outside the friction angle, no matter this No matter how small the force is, it is impossible for an object to maintain balance. This equilibrium condition, which has nothing to do with the magnitude of the force but is related to the friction angle, is called the self-locking condition. The balance phenomenon of objects under this condition is called self-locking phenomenon.

The first rod body 1 includes a first rod body 11 and a threaded connection section 12 , the first rod body 11 and the threaded connection section 12 are integrally formed, and the threaded connection section 12 is provided with an external thread 13 .

The second rod body 2 includes a second rod body 21 and a threaded connecting pipe 22, the second rod body 21 and the threaded connecting pipe 22 are integrally formed, and the threaded connecting pipe 22 is provided with a Internal thread 23. The adaptive connection of the internal thread and the external thread further ensures the realization of the self-locking phenomenon.

Thus, by twisting the thread, the length of the support rod assembly can be adjusted, so it can be applied to roadway support of different widths; in addition, according to the principle of self-locking, no matter how large the force exerted on both ends of the support rod assembly , the support rod assembly will not undergo axial deformation.

The depth of the external thread 13 is 0.1-0.15 times the diameter of the threaded connection section. This thread depth not only ensures the realization of the self-locking phenomenon, but also ensures that the length of the support rod assembly and the roadway are accessories, and the operation is convenient.

The included angle α between the tangent of the external thread 23 and the plane perpendicular to the axis of the first rod body is 5 to 30°.

As shown in FIG. 4 , a metal mesh layer 3 is also included, and the metal mesh layer 3 is wrapped around the outside of the first rod body 1 and the second rod body 2 . The arrangement of the metal mesh layer provides double insurance for the support rod assembly, and further strengthens the strength of the roadway roof support device of the present invention.

The metal mesh layer 3 is made of elastic steel wire or elastic copper wire, and the metal mesh layer 3 is elastic. As shown in Figure 6, the elastic mesh is woven by the interlaced weaving method of warp and weft, so it has a certain degree of elasticity in the axial and radial directions, and the elastic metal mesh layer can be better integrated with The rod fits snugly.

As shown in Figure 4, also comprise anticorrosion layer 4, described anticorrosion layer 4 is sleeved on the outside of metal mesh layer 3, and described anticorrosion layer 4 is made of rubber or latex, and described anticorrosion layer 4 and metal mesh layer 3 tight fit. The setting of the anti-corrosion layer can slow down the aging speed of the rod body and the weaving layer so as to prolong the service life of the supporting device.

As shown in Fig. 5, the plurality of circular grooves are equally spaced on the high-strength steel strip. Evenly distributed circular grooves indicate that the matching support rod components are also uniformly distributed, so that the force distribution is more uniform, which is more conducive to the support of the roadway roof.

The above descriptions are only 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 principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. A roadway roof support device is characterized in that it comprises two high-strength steel bands (5) and a plurality of support rod assemblies, and the high-strength steel band (5) is provided with a support rod assembly Matching circular grooves (51), the two ends of the support rod assembly are respectively connected to the circular grooves (51) of two high-strength steel strips (5). 2. The roadway roof support device according to claim 1, characterized in that, the support rod assembly comprises a first rod body (1) and a second rod body (2), and the first rod body (1) One end is connected with one end of the second rod body (2) through threaded self-locking. 3. The roadway roof support device according to claim 2, characterized in that, the first rod body (1) comprises a first rod body (11) and a threaded connection section (12), and the first rod body (11) is integrally formed with a threaded connection section (12), and the threaded connection section (12) is provided with an external thread (13). 4. The roadway roof support device according to claim 3, characterized in that, the second rod body (2) comprises a second rod body (21) and a threaded connecting pipe (22), and the second rod body (21) and the threaded connection pipe (22) are integrally formed, and the threaded connection pipe (22) is provided with an internal thread (23) that is compatible with the external thread. 5. The roadway roof support device according to claim 3, characterized in that, the depth of the external thread (13) is 0.1-0.15 times the diameter of the threaded connection section. 6. The roadway roof support device according to claim 3, characterized in that the angle α between the tangent of the external thread (23) and the plane perpendicular to the axis of the first rod is 5 to 30 °. 7. The roadway roof support device according to any one of claims 1-6, characterized in that it further comprises a metal mesh layer (3), and the metal mesh layer (3) is wrapped around the first rod body (1 ) and the outside of the second rod body (2). 8. The roadway roof support device according to claim 7, characterized in that, the metal mesh layer (3) is made of elastic steel wire or elastic copper wire, and the metal mesh (3) layer has elasticity ; Also include an anti-corrosion layer (4), the anti-corrosion layer (4) is sleeved on the outside of the metal mesh layer (3), the anti-corrosion layer (4) is made of rubber or latex, the anti-corrosion layer (4) It is tightly attached to the metal mesh layer (3). 9. The roadway roof support device according to any one of claims 1-6, 8, characterized in that, the plurality of circular grooves are equally spaced on the high-strength steel strip. 10. The roadway roof support device according to claim 1, characterized in that the diameter of the circular groove on the high-strength steel strip is equal to the outer diameter of the support rod assembly.