CN210343358U

CN210343358U - Plug-in type floor of coal mining tunnel

Info

Publication number: CN210343358U
Application number: CN201920916139.9U
Authority: CN
Inventors: 赵云飞
Original assignee: Inner Mongolia Wanqi Machinery Processing Co ltd
Current assignee: Inner Mongolia Wanqi Machining Co ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-04-17
Anticipated expiration: 2029-06-18

Abstract

A plug-in type floor of a coal mining tunnel belongs to the technical field of coal mining, and is formed by plugging a plurality of floor blocks; each floor block comprises a plug-in frame and concrete poured in the plug-in frame; in two adjacent floor blocks which are mutually inserted, a plug arranged on the outer side of the insertion frame of one floor block is inserted into a jack matched with the plug arranged on the insertion frame of the other floor block; a socket matched with the plug is arranged at the inner end of the jack; a plug-in type floor of a coal mining tunnel can prevent and cure bottom heave, can improve the construction efficiency and accelerate the construction progress; thirdly, the material can be repeatedly recycled, the production cost is reduced, the production data is saved, and the resource waste is reduced; the hoisting is convenient, the carrying and the splicing are convenient, and the construction progress and the construction efficiency are accelerated; the additional rubber layer further enhances the anti-arching effect of the concrete, so that the concrete can obtain higher capacity of resisting the residual deformation resistance of the foundation drum.

Description

Plug-in type floor of coal mining tunnel

Technical Field

The invention belongs to the technical field of coal mining, and particularly relates to a plug-in type floor for a coal mining roadway.

Background

In coal mine production, the floor heave of different degrees can appear in almost all stoping tunnels, especially along with coal mining gradually moves to the deep in recent years, and then the ground stress correspondingly increases, and the tunnel floor heave problem becomes outstanding serious day by day to expose a lot of problems that influence coal mine safety in production. The bottom heave is a dynamic phenomenon frequently occurring in a coal mine roadway, and is directly related to the properties of surrounding rocks, mine pressure, mining depth, geological structure and the like. In the amount of approach of the roadway top and bottom, people can control the sinking of the top board and the approach of the two sides to a certain degree, so that about 2/3 is caused by the bottom heave. Such problems can cause great difficulty in the normal operation of the construction and production of deep-extraction mines, particularly soft rock mines. The bottom bulge causes the deformation of the roadway and the reduction of the section, influences the ventilation and transportation and restricts the safe production of the mine.

The prevention and treatment measures for roadway floor heave mainly comprise:

1. the pressure relief method is characterized in that the stress state of the surrounding rock of the roadway is changed by adopting some artificial measures, so that the bottom plate rock stratum is in a stress reduction area, and the stable state of the bottom plate rock stratum is ensured. It is especially suitable for controlling floor heave of high ground stress tunnel. The existing pressure relief method comprises the forms of joint cutting, drilling, blasting, roadway digging and pressure relief and the like. This measure of drilling is technically very difficult, since it is very difficult to drill holes with a diameter of 50 to 60mm without deflection in the case of very small drill hole spacings. In addition, this measure has a smaller relief range than the floor slot, so that the possibility of a floor heave after drilling is taken into account.

2. The floor is reinforced with anchor rods, which are usually layered and thus well suited for reinforcement with anchor rods. The wood anchor rod is generally used for vertical drilling in a roadway, and the steel anchor rod is used for an inclined hole and anchored into a stratum below two sides (about 35-40 degrees from the two sides of the roadway). The crushing degree of the roadway bottom plate is reduced. The support has two main aspects of the working principle that firstly, the weak bottom plate rock stratum is connected with the stable rock stratum at the lower part of the weak bottom plate rock stratum, the crack opening and the generation of new cracks caused by the dilatation and expansion of the weak rock stratum are inhibited, and the weak rock stratum is prevented from rising upwards. Secondly, several rock stratums are connected together to be used as a combined beam to bear bending moment. The ultimate bending strength of the composite beam is greater than the sum of the bending strengths of the individual formations. Tests conducted under a variety of geological conditions have shown that successful reinforcement of a weak mat does not necessarily require that it have a layered construction, with the mat strata being reinforced with anchor rods to increase the flexural strength.

3. And bottom plate grouting is generally used for reinforcing broken rocks and improving the anti-bottom-bulging capability of the rock stratum. When the pressure born by the bottom plate rock exceeds the strength of the rock body to generate cracks and fissures, a grouting method is adopted to improve the strength of the bottom plate rock stratum so as to achieve the purpose of preventing and treating the bottom plate heaving. Because of the different forms, materials, pressures and durations of the selected grouting, fractures in the rock formation may be wholly or partially cemented, and when the grouting pressure is higher than the surrounding rock strength, new fractures are created and grout penetrates. The bonding strength of the rock stratum after grouting mainly depends on the selected grouting material, namely, the polyurethane material is adopted, the bonding strength between rock strata is higher, the reinforcing effect is better, but the bonding strength is lower when the bottom plate is wet, and the cost is higher; the cementing slurry has low cost, but has low bonding strength, so the materials are reasonably selected according to actual conditions when being selected. It should also be noted that bottom grouting of soft rock does not guarantee success. If the grouting and anchoring are combined, the range of only applying the grouting and anchoring can be expanded.

4. And (3) filling a tunnel wall between the tunnel and the non-mined coal column, wherein pressure distribution is improved mainly by transferring a flank stratum pressure fulcrum to a place far away from the tunnel, so that the resistance of bottom plate clay flowing to the tunnel from the lower side of the non-mined coal column is increased. Another base plate support for permanent tunnel is to dig rectangular pit on the tunnel base plate and then fill it with the material hardened by water to form concrete reverse arch. The support has high and uniform support resistance acting on the bottom plate on average. The telescopic supporting pieces are additionally arranged, so that the concrete is further reinforced to form a larger capacity of resisting the residual deformation resistance of the base drum.

5. The control of water in roadways, which is the presence of water in many underground roadways, is an important cause of floor heave in roadways, as water erosion softens almost all mineral strength in nature. It is therefore important what method is used to ensure that the floor is not severely affected by the water. This requires timely and smooth drainage of the underground roadway, while requiring high standards of drainage.

A rectangular pit groove is dug on a roadway bottom plate, and then a material hardened in water is filled in the pit groove to form a concrete inverted arch. The support has high and uniform support resistance acting on the bottom plate on average. The telescopic supporting pieces are additionally arranged, so that the concrete is further reinforced to form a larger capacity of resisting the residual deformation resistance of the base drum. Most mines generally adopt a concrete inverted arch method to prevent and treat the bottom heave, and the method is adopted to prevent and treat the defects of the bottom heave: the concrete inverted arch is generally laid on a concrete floor, and due to the lack of construction equipment for laying the concrete floor, the construction efficiency is not high, and the construction progress is slow; after the coal mining task of the coal mining roadway is finished, the paved concrete floor is buried in the coal mining roadway when the coal mining roadway is backfilled, and great waste is caused.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the plug-in type coal mining roadway floor which can accelerate the construction progress and efficiency and can be repeatedly recycled.

In order to achieve the purpose of the invention, the following technical scheme is adopted for implementation.

The utility model provides a plug-in type floor in coal mining tunnel which characterized in that: the floor is formed by splicing a plurality of floor blocks; each floor block comprises a plug-in frame and concrete poured in the plug-in frame; in two adjacent floor blocks which are mutually inserted, a plug arranged on the outer side of the insertion frame of one floor block is inserted into a jack matched with the plug arranged on the insertion frame of the other floor block; and a socket matched with the plug is arranged at the inner end of the jack.

Preferably, the bottom of the floor board is additionally provided with a rubber layer.

Preferably, the plug frame, the plug and the socket are all made of steel plates.

The utility model provides a plug-in type floor in coal mining tunnel which characterized in that: the floor is formed by splicing a plurality of rubber building blocks; in two adjacent rubber building blocks which are mutually inserted, a plug which is convexly arranged on the side surface of one rubber building block is inserted into a socket which is arranged on the side surface of the other rubber building block and is matched with the plug.

Advantageous effects

After the floor blocks are manufactured, a plurality of floor blocks are inserted into the floor of the coal mining roadway, so that the floor heave can be prevented, the construction efficiency can be improved, and the construction progress can be accelerated; thirdly, the material can be repeatedly recycled, the production cost is reduced, the production data is saved, and the resource waste is reduced; the hoisting is convenient, the carrying and the splicing are convenient, and the construction progress and the construction efficiency are accelerated; the additional rubber layer further enhances the anti-arching effect of the concrete, so that the concrete can obtain higher capacity of resisting the residual deformation resistance of the foundation drum.

Drawings

FIG. 1 is a schematic structural view of the plug-in floor of the present invention;

fig. 2 is a schematic structural diagram of the insertion frame according to the present invention.

Detailed Description

The invention is further described with reference to the accompanying drawings and examples.

As shown in fig. 1-2, a plug-in floor 1 of a coal mining roadway is formed by plugging a plurality of floor blocks 2, so that the floor 1 has the functions of concrete reverse arch and repeated use and the supporting function of a transportation track and the like; each floor block 2 comprises a plug-in frame 3 and concrete 4 poured in the plug-in frame 3, and in two adjacent floor blocks 2 which are mutually plugged, a plug 5 arranged on the outer side of the plug-in frame 3 of one floor block 2 is plugged with a jack 6 which is arranged on the plug-in frame 3 of the other floor block 2 and is matched with the plug 5; the inner end of the jack 6 is provided with a socket 7 matched with the plug 5.

In one embodiment, as shown in fig. 1-2, the socket 7 is provided with a circular socket that mates with the plug 5, and the open end of the circular socket communicates with the socket 6.

In one embodiment, shown in fig. 1-2, the plug socket 6 and the plug 7 of the jack frame 3 facilitate lifting of the floor panels 2 by using a lock and hook spreader to hold the plug 7 and hook the plug socket 6.

In one embodiment, as shown in fig. 1-2, the lifting device 8 is fixedly connected to the plug-in frame 3 by means of a tie bar 9.

In one embodiment, as shown in fig. 1-2, the hoisting device 8 and the tie bars 9 are made of steel.

In one embodiment, as shown in fig. 1-2, the lifting device 8 includes a lifting frame 10 and a lifting rod 11, and the lifting rod 11 is installed in the lifting frame 10.

In one embodiment, as shown in fig. 1-2, the rubber layer 12 is added to the bottom of the floor board 2 to further strengthen the concrete arch inversion, so that the floor board has greater resistance to residual deformation of the base drum.

In one embodiment, as shown in fig. 1-2, the frame 3, the plug 5 and the socket 7 are made of steel plates to enhance the supporting function and to achieve a rigid connection between the frames 3.

In one embodiment, the plug-in type floor of a coal mining roadway is formed by plugging a plurality of rubber building blocks; in two adjacent rubber building blocks which are mutually inserted, a plug which is convexly arranged on the side surface of one rubber building block is inserted into a socket which is arranged on the side surface of the other rubber building block and is matched with the plug.

Claims

1. The utility model provides a plug-in type floor in coal mining tunnel which characterized in that: the floor is formed by splicing a plurality of floor blocks; each floor block comprises a plug-in frame and concrete poured in the plug-in frame; in two adjacent floor blocks which are mutually inserted, a plug arranged on the outer side of the insertion frame of one floor block is inserted into a jack matched with the plug arranged on the insertion frame of the other floor block; and a socket matched with the plug is arranged at the inner end of the jack.

2. The plug-in floor of a coal mining roadway according to claim 1, characterized in that: and a rubber layer is additionally arranged at the bottom of the floor block.

3. The plug-in floor of a coal mining roadway according to claim 1, characterized in that: the plug-in frame, the plug and the socket are all made of steel plates.

4. The utility model provides a plug-in type floor in coal mining tunnel which characterized in that: the floor is formed by splicing a plurality of rubber building blocks; in two adjacent rubber building blocks which are mutually inserted, a plug which is convexly arranged on the side surface of one rubber building block is inserted into a socket which is arranged on the side surface of the other rubber building block and is matched with the plug.