CN217841705U - Entry retaining support convenient for moving support at machine head and machine tail of roof cutting pressure relief coal-pillar-free working face machine - Google Patents
Entry retaining support convenient for moving support at machine head and machine tail of roof cutting pressure relief coal-pillar-free working face machine Download PDFInfo
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- CN217841705U CN217841705U CN202222141216.2U CN202222141216U CN217841705U CN 217841705 U CN217841705 U CN 217841705U CN 202222141216 U CN202222141216 U CN 202222141216U CN 217841705 U CN217841705 U CN 217841705U
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Abstract
The utility model relates to a roof cutting release does not have coal column working face machine head tail department and is convenient for move the entry retaining support of frame usefulness belongs to hydraulic support technical field. The utility model discloses a back timber, base and stand, back timber adopt the strip back timber of box structure, are provided with two cap posts in it, and the base adopts two pedestals of box structure, and the stand is provided with two to support between back timber and base, the outer cylinder bottom design of the cylinder body of stand is the platykurtic, and sets up for standing vertically between the base. The utility model discloses entry retaining support design science, rational in infrastructure, convenient to use, maintenance are simple, the utility model discloses entry retaining support has abandoned mine monomer pillar to pass the unsafe operating means that the scraper conveyor tail wastes time and energy in the use of mine, provides safe efficient operation environment, reduces workman's intensity of labour, has improved safe operation coefficient for the advancing speed of working face has created economic benefits for the mine indirectly, and the effect is more showing in the application of intelligent working face.
Description
Technical Field
The utility model belongs to the technical field of hydraulic support, specifically a cut top release does not have coal column working face machine head tail department and is convenient for move a lane keeping support of usefulness.
Background
The top cutting pressure relief coal pillar-free mining technology adopts a blasting technology to presplit a top plate, utilizes the mine pressure in a goaf to cut the top along the goaf to form a short arm beam, utilizes the broken expansion of rock caving in the goaf to support the rock mass covered with the old top, controls the rotation and sinking deformation of the old top and realizes pressure relief; the cut roof rock mass forms a roadway side, so that the lower gate way of the working face is reserved and is used as the upper gate way of the adjacent working face.
In the practical application process of the roof-cutting pressure-relief automatic roadway-forming coal-pillar-free mining technology, a gob-side entry retaining technical scheme is involved, the technical scheme is that a position is reserved for roof cutting, one hydraulic support is less arranged at the tail position of a scraper conveyor, in the pushing and sliding process, the rear half part of the tail generates a hysteresis phenomenon due to single-side stress of the front half part, and a single upright post is required to be used for leveling the tail part, so that the propelling speed of a working face is seriously influenced. Therefore, a roadway support needs to be designed to meet the requirement of mining without coal pillars by roof cutting and pressure relief of an ore square.
The gob-side entry retaining effect depends on the support strength of the roadway, and according to the support theory and the combined action principle of the roadway and surrounding rocks, the optimal support mode of the gob-side entry retaining is that a combined support is formed by an inner support of the roadway and a roadside support; the degree of automation of the machine tail of the working face depends on the arrangement relationship of the supports and the types of supporting products used. In order to solve the problems and ensure the integral synchronism of the movement of the tail, the rear half part of the tail is added with thrust lost due to less arrangement of brackets, and a perfect transition end head operation supporting area and a supporting area of a roadway are formed.
In summary, there is a need to design a support for retaining roadway to meet the requirement of mining without pillars for roof cutting and pressure relief of mine.
Disclosure of Invention
The utility model aims at solving the problems existing in the prior art and providing a roadway support convenient for moving the support at the head and the tail of a coal-pillar-free working face machine for roof cutting and pressure relief.
The utility model discloses a realize through following technical scheme:
a roadway support convenient for moving at the tail of a roof-cutting pressure-relief coal-column-free working face machine head comprises a top beam, a base and a stand column, wherein the top beam is a strip-shaped top beam in a box-shaped structure, two column caps are fixedly connected in the top beam, the two column caps are respectively arranged at the left end and the right end of the top beam, and cap openings are arranged downwards;
the base comprises a left base body and a right base body which are arranged at intervals, a rigid bridge plate is fixedly connected between the front ends of the two base bodies, and a rigid connecting frame plate is fixedly connected between the rear ends of the two base bodies; the seat body adopts a box-shaped structure, a top plate positioned in the middle of the seat body is provided with an upright post mounting hole, and two sides of the upright post mounting hole are provided with fixing lug seats;
the outer cylinder bottom of the cylinder body of the upright post is designed to be flat, and two sides of the cylinder body are respectively provided with a connecting lug plate;
the two upright posts are respectively and correspondingly arranged with the two post caps on the top beam and the two seat bodies on the base; the cylinder body of the upright post is arranged on the corresponding seat body through an upright post installation Kong Chashe, and a connecting lug plate on the cylinder body is fixedly connected with a fixed lug seat on the seat body; the column cap of the upright column is arranged in the corresponding column cap on the top beam.
Furthermore, a pushing jack and a pushing rod are mounted on the base, the pushing jack and the pushing rod are located between the two base bodies, the end portion of a cylinder body of the pushing jack is fixedly connected into the connecting frame plate, and the pushing rod is connected to the end portion of a piston rod of the pushing jack.
Furthermore, the column head of the upright column is a solid column head, mounting blind holes are respectively formed in two opposite sides of the column head, connecting holes are respectively formed in positions, corresponding to the two mounting blind holes, on the column cap, and a short pin shaft is inserted into each group of corresponding connecting holes and mounting blind holes; the positions of the outer wall of the column cap, which are close to the two sides of the connecting hole, are respectively fixed with lug seats, an anti-falling pin is inserted between the two lug seats, and split pins are arranged at the two ends of the anti-falling pin.
Furthermore, the inner diameter of the installation blind hole is larger than the diameter of the short pin shaft.
The utility model discloses the design of entry retaining support is based on the mine use actually and based on the performance reanalysis of developed product, this safe high efficiency energy-conserving theory, for better realization tail push away swift current automatic, improve the result of use of roof beam mechanism product of turning on one's side, form the product series of perfect roof cutting release no coal column working face special type support, and development design.
Under the condition that the space of a roadway retaining working surface is limited, the roadway retaining support is designed to realize that the thrust missing due to less support arrangement is added in the rear half part of the machine tail, so that the automatic pushing and sliding of the machine head and the machine tail is realized, and a perfect transition end operation support area and a support area of a roadway are realized.
The design of the roadway-retaining support fully considers the wide applicability of the roadway-retaining support, and along with the continuous perfection and popularization of the coal-pillar-free mining technology, the roadway-retaining support which is convenient for moving the supports at the machine heads and the machine tails of the roof-cutting pressure-relief coal-pillar-free working faces can be widely popularized, and the recovery rate of coal resources can be greatly improved.
The utility model discloses entry retaining support design science, rational in infrastructure, convenient to use, maintenance are simple, the utility model discloses entry retaining support has abandoned mine monomer pillar to pass the unsafe operating means that the scraper conveyor tail wastes time and energy in the use of mine, provides safe efficient operation environment, reduces workman's intensity of labour, has improved safe operation coefficient for the advancing speed of working face has created economic benefits for the mine indirectly, and the effect is more showing in the application of intelligent working face.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention in any way.
Figure 1 is the utility model discloses the overall structure schematic diagram of entry retaining support.
Fig. 2 is a schematic structural view of the top beam in the entry retaining support of the present invention.
Fig. 3 is the structure diagram of the base in the lane keeping support of the utility model.
Fig. 4 is the structure schematic diagram of the middle column of the entry retaining support of the utility model.
Fig. 5 is a first schematic connection diagram (cross-sectional view) of the column head of the column and the column cap of the top beam in the roadway support of the present invention.
Fig. 6 is a second schematic connection diagram (top view) between the head of the pillar and the cap of the top beam in the roadway support of the present invention.
In the figure: 1-top beam, 2-base, 2-1-base, 2-2-rigid bridge plate, 2-3-rigid connecting frame plate, 2-4-column mounting hole, 3-column, 3-1-column cap, 3-2-mounting blind hole, 4-column cap, 5-fixing ear seat, 6-pushing jack, 7-pushing rod, 8-connecting ear plate, 9-short pin shaft, 10-ear seat, 11-anti-drop pin and 12-split pin.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the present invention will be further clearly and completely described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As shown in fig. 1 to 6, a roof cutting pressure relief roadway support convenient for support moving at the machine head and the machine tail of a coal-pillar-free working face machine comprises a top beam 1, a base 2 and an upright post 3.
The top beam 1 is a strip-shaped top beam 1 with a box-shaped structure, so that noninvasive support of a top plate is realized, the strip-shaped top beam is an open box-shaped structure, the roof support structure can be better adapted to the top plate of an underground roadway on the premise of meeting support strength, and the open box-shaped structure can avoid the outer leakage parts of roof anchor rods and anchor cables; two caps 4 are welded and fixed in the top beam 1, the two caps 4 are respectively arranged at the left end and the right end of the top beam 1, and the cap openings are all arranged downwards.
The base 2 comprises a left base body 2-1 and a right base body 2-1 which are arranged at intervals, a rigid bridge plate 2-2 is fixedly connected between the front ends of the two base bodies 2-1, and a rigid connecting frame plate 2-3 for installing a pushing jack 6 is fixedly connected between the rear ends of the two base bodies 2-1; the seat body 2-1 adopts a box-shaped structure, a top plate positioned in the middle of the seat body is provided with an upright post mounting hole 2-4, and two sides of the upright post mounting hole 2-4 are provided with fixing lug seats 5; the base 2 structurally forms a light and thin rigid integral base, the base 2 is designed into a low and small integral box-type base 2 in combination with actual requirements at the tail position with limited arrangement space, the contact area of a bottom plate of the base 2 is large, and the stability is good; the torsional strength of the rigid bridge plate 2-2 designed at the front end of the base 2 is improved.
A pushing jack 6 and a pushing rod 7 are arranged on the base 2, the pushing jack 6 and the pushing rod 7 are positioned between the two base bodies 2-1, the end part of a cylinder body of the pushing jack 6 is fixedly connected in the rigid connection frame plate 2-3, and the pushing rod 7 is connected to the end part of a piston rod of the pushing jack 6.
The outer cylinder bottom of the cylinder body of the upright post 3 is designed to be flat, so that the upright post 3 and the base 2 are directly and stably supported, the upright post 3 and the base 2 are always kept in an upright state, and the support efficiency is high; the both sides of cylinder body are provided with respectively and connect otic placode 8 for use with the cooperation of fixed ear seat 5 on the base 2, realize direction and spacing to stand 3.
The two upright posts 3 are respectively arranged corresponding to the two post caps 4 on the top beam 1 and the two base bodies 2-1 on the base 2; the cylinder body of the upright post 3 is inserted and installed on the corresponding seat body 2-1 through the upright post installation hole 2-4, and the connecting lug plate 8 on the cylinder body is fixedly connected with the fixed lug seat 5 on the seat body 2-1; the column head 3-1 of the upright column 3 is arranged in the corresponding column cap 4 on the top beam 1.
Because the roadway top plate moving amount is large in the roadway retaining process, the impact load borne by equipment is large, a pin shaft at the joint of a column cap 3-1 of the upright column 3 and a column cap 4 of the top beam 1 is easy to deform, and the pin shaft can be broken under extreme conditions; after the pin shaft is deformed and broken, the supporting effect of the equipment is not influenced, but potential safety hazards exist in the recycling process of the equipment; therefore, the connection between the column cap 3-1 and the column cap adopts a break-proof pin connection structure to prevent the deformation and fracture of the pin shaft, which specifically comprises the following steps: the two opposite sides of the column cap 3-1 are respectively provided with a blind mounting hole 3-2, the positions of the column cap 4 corresponding to the two blind mounting holes 3-2 are respectively provided with a connecting hole, and a short pin shaft 9 is inserted in each group of corresponding connecting hole and blind mounting hole 3-2; the outer wall of the column cap 4 is fixed with ear seats 10 adjacent to the two sides of the connecting hole, respectively, an anti-drop pin 11 is inserted between the two ear seats 10, and split pins 12 are arranged at the two ends of the anti-drop pin 11. The anti-broken pin connecting structure adopts two short pin shafts 9 which are used in a matched mode, the coaxiality requirement of the whole pin shaft at the position when the whole pin shaft is used is released due to the use of the structure of the short pin shafts 9, and the degree of freedom and the adaptability of the connecting position are improved; meanwhile, in order to prevent the short pin shaft 9 from falling off, an anti-falling structure is added on the outer side of the column cap 4, and the anti-falling structure is composed of an ear seat 10, an anti-falling pin 11 and a split pin 12, so that the short pin shaft 9 can be effectively prevented from falling off. The column cap 3-1 of the upright column 3 adopts the solid column cap 3-1, the strength and the deformation resistance of the column cap 3-1 are improved, the inner diameter of a blind mounting hole 3-2 on the column cap 3-1 is slightly larger than the diameter of the short pin shaft 9, and the probability that the short pin shaft 9 is extruded when the column cap 3-1 rotates in the column cap 4 is reduced by properly increasing the diameter of the blind mounting hole 3-2.
The basic performance, economic benefit, popularization and application condition and prospect of the roadway retaining support convenient for moving the support at the machine head and the machine tail of the roof cutting pressure relief coal-pillar-free working face machine are as follows:
1) Basic properties: the automatic machine-following device has the functions of top-contacting, pushing and frame pulling, and realizes the effective automatic machine-following operation of the tail of the machine and the like.
2) Economic benefits are as follows: the conventional support method for the two ends of the fully mechanized mining face is that single hydraulic supports are manually matched with the wood column caps 4 for dense support, the requirement of the distance between the single supports is not more than 1 m, the number of times of manually moving the supports is 1 time/root/cycle, the two ends of the fully mechanized mining face are affected by the initial pressure and the periodic pressure of a top plate and belong to a stress unstable area, and the labor intensity is high and great potential safety hazards exist during manual operation. The automatic machine following of the machine tail is realized by adopting the entry retaining support, the frame moving time is shortened, and the single-shift coal yield is improved; the workload of moving the support can be reduced by 1-2 persons per shift, and the labor time investment is reduced; the roadway-retaining support is adopted to replace the original single prop support, the investment of the single prop can be reduced by more than 100 ten thousand yuan each year, the cost of the emulsion for the single prop is more than 20 ten thousand yuan, the emission of the emulsion is reduced, and the environmental pollution is avoided; the product adopts mature design means, thereby ensuring the quality of the product and reducing the repair rate.
3) Popularization and application conditions and prospects: the entry retaining support can meet various requirements of a roof cutting pressure relief coal pillar-free mining technology, is applied to intelligent coal mining working faces of coal mines on the Hozhou coal and electricity group store level grounds, and along with the popularization of the technology, an entry retaining support product can be applied to more mines; the roadway-retaining support has the advantages of low cost and high propelling speed, can solve the problem that the existing stepping self-moving advanced hydraulic support repeatedly supports the top plate to cause instability of the top plate, and is a product with extremely high cost performance; the design of the auxiliary support is analyzed by utilizing three-dimensional dynamic simulation and finite elements, so that the design reliability is improved, and the production period is shortened; along with the popularization of the intelligent technology, the advantage that the entry retaining support improves the automation degree of the working face is increasingly remarkable, and the entry retaining support plays a more important role in production.
The technical solutions in the embodiments of the present invention have been clearly and completely described above, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides a roof cutting release does not have coal column working face machine head tail department and is convenient for move entry support of frame usefulness, includes back timber, base and stand, its characterized in that: the top beam is a strip-shaped top beam with a box-shaped structure, two column caps are fixedly connected in the top beam, the two column caps are respectively arranged at the left end and the right end of the top beam, and cap openings are arranged downwards;
the base comprises a left base body and a right base body which are arranged at intervals, a rigid bridge plate is fixedly connected between the front ends of the two base bodies, and a rigid connecting frame plate is fixedly connected between the rear ends of the two base bodies; the seat body is of a box-type structure, a top plate positioned in the middle of the seat body is provided with an upright post mounting hole, and two sides of the upright post mounting hole are provided with fixing lug seats;
the outer cylinder bottom of the cylinder body of the upright post is designed to be flat, and two sides of the cylinder body are respectively provided with a connecting lug plate;
the two upright posts are respectively and correspondingly arranged with the two post caps on the top beam and the two seat bodies on the base; the cylinder bodies of the upright posts are arranged on the corresponding seat bodies through upright post installation Kong Chashe, and the connecting lug plates on the cylinder bodies are fixedly connected with the fixed lug seats on the seat bodies; the column cap of the upright column is arranged in the corresponding column cap on the top beam.
2. The roadway-retaining support convenient for moving at the machine tail of the roof-cutting pressure-relief coal-pillar-free working face machine head according to claim 1 is characterized in that: the base is provided with a pushing jack and a pushing rod, the pushing jack and the pushing rod are positioned between the two base bodies, the end part of a cylinder body of the pushing jack is fixedly connected in the connecting frame plate, and the pushing rod is connected to the end part of a piston rod of the pushing jack.
3. The roadway-retaining support convenient for moving at the machine tail of the roof-cutting pressure-relief coal-pillar-free working face machine head according to claim 1 or 2, is characterized in that: the column cap of the upright column is a solid column cap, mounting blind holes are respectively formed in two opposite sides of the column cap, connecting holes are respectively formed in positions, corresponding to the two mounting blind holes, on the column cap, and a short pin shaft is inserted into each group of corresponding connecting holes and the mounting blind holes; the positions of the outer wall of the column cap, which are close to the two sides of the connecting hole, are respectively fixed with lug seats, an anti-falling pin is inserted between the two lug seats, and split pins are arranged at the two ends of the anti-falling pin.
4. The roadway-retaining support convenient for moving at the machine tail of the roof-cutting pressure-relief coal-pillar-free working face machine head according to claim 3, characterized in that: the inner diameter of the mounting blind hole is larger than the diameter of the short pin shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222141216.2U CN217841705U (en) | 2022-08-15 | 2022-08-15 | Entry retaining support convenient for moving support at machine head and machine tail of roof cutting pressure relief coal-pillar-free working face machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222141216.2U CN217841705U (en) | 2022-08-15 | 2022-08-15 | Entry retaining support convenient for moving support at machine head and machine tail of roof cutting pressure relief coal-pillar-free working face machine |
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| Publication Number | Publication Date |
|---|---|
| CN217841705U true CN217841705U (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222141216.2U Active CN217841705U (en) | 2022-08-15 | 2022-08-15 | Entry retaining support convenient for moving support at machine head and machine tail of roof cutting pressure relief coal-pillar-free working face machine |
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| CN (1) | CN217841705U (en) |
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- 2022-08-15 CN CN202222141216.2U patent/CN217841705U/en active Active
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