RU2467170C2 - Flexibility assembly lock of metallic frame yielding support from mine special sections - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention relates to mining, particularly, to clamps for metallic frame support sliding arched elements. Proposed assembly comprises strap with holes, "П"-like gooseneck with threaded ends, inner and outer special sections, nuts and stabilisation reinforcements arranged between said strap and flange of inner special section. Note here that stabilisation reinforcements are composed of two hollow unequal-volume prismatoids with end faces made up of right-angular equal-height trapezoids. Midlength section of top prismatoids base area relates to that of bottom prismatoids as 3:1. prismatoids stay in contact via outlines of larger bases while face planes of top and bottom prismatoids have holes to receive "П"-like gooseneck. Note here that top prismatoid side surface stays in contact with inclined side wall of special section to rest on lock strap. Top prismatoid base face surface is fitted in thrust with mine section flange on diametrically opposite side to make force-closure of yield assembly.

EFFECT: higher reliability, stable operation.

5 dwg

Description

The technical field to which the invention relates.

The invention relates to the mining and coal industries, in particular, to devices of power closure of ductility nodes, sliding at maximum load of joints of elements of arched ductile metal frame supports made of mine special profiles to prevent collapse of surrounding rocks, to preserve the required dimensions of communication cross sections, as well as mountain pressure.

The level of technology.

It is known that for the fastening and maintenance of mine workings of coal, ore and shale mines, arched rigid and pliable metal frame supports are used. Hard supports are mainly used in conditions with constant and low rock pressure. Arch compliant frame supports are a universal engineering structure used in difficult mining and geological conditions, with the possible significant impact of treatment work on the geometric shape and size of the cross sections of communications and preparatory workings.

The main and essential advantage of ductile roof supports is their ability to perceive rock displacements with increasing rock pressure through the relative movement of constituent elements.

The frame of the flexible lining is formed of links (elements) made of mine special profiles, and it can be given a functional geometric shape depending on the purpose of the mine and the expected manifestations of rock pressure. Bearing elements of a frame compliant lining are made in the form of rectilinear rods in combination with links outlined by second-order curves, equidistant to the geometry of the workings being laid with the possibility of perceiving compressive and bending loads when the arch is included in the maintenance work.

The function of the elements of arched ductile metal frame supports is to perceive and redistribute the pressure from the side of the rock mass to the surrounding formation, creating backwater on the contour with minimizing the displacement of the rocks inward and convergence of the sides of the communications.

The supporting element of the frame lining - the upper, which receives the load from the side of the roof of the mine, transfers it to the supporting elements connected with it, by means of various types of lock joints, racks. In open structures of frame roof supports, the racks rest with their ends on the soil of the mine working, and in closed ones - on the lower bearing element, called the bed.

The most common forms of arches of frame supports are annular (circular), horseshoe-shaped, ovoid, elliptical; vaulted and trapezoidal forms are much less common (see V.N. Karetnikov, B. Kleimenov, A.G. Nuzhdikhin. Fastening of capital and preparatory mine workings. Reference book. - M .: Nedra, 1989. - 571 pp., ill. ) Usually, in difficult geological conditions, multi-link (three-link, five-link) metal frame compliant roof supports are used (see B. A. Gryaduschiy, N. A. Aliev, VB Gryaduschy. Criteria that determine the possibilities of intensifying mining of mineral deposits. In the collection of scientific works: Ways and means of creating safe and healthy working conditions in coal mines, Part 1; State Makeevka Research Institute for Work Safety in Mining, MakNII. Makeevka-Donbass, 2004. p.106 ... 118).

Three-link metal frame malleable supports are recommended for mine workings with an expected displacement of roof rocks up to 500 mm. Five-link metal frame ductile supports are mainly used for mine workings with an expected displacement of roofing rocks of more than 500-1000 mm.

The performance of the lining largely depends on the accepted design of the connections (nodes) of the supporting links. Among them, one should distinguish between rigid, articulated, malleable and combined. Connections of load-bearing elements with each other should not only absorb all the forces arising in the lining, but also provide the necessary deformation characteristic of the lining. A rigid connection of the elements is the simplest in design and provides a fixed fixation of the contacting elements in the nodes of compliance. The swivel connection of the elements makes it possible to rotate them in the plane of the frame with a given bending moment equal in ordinary joints to the moment of friction in the hinge. If the adjacent support elements are pliable connected, then depending on the design of such a connection (a “knot” or a “lock” pliability), one of them or both can move in the longitudinal direction if the longitudinal force exceeds the pliability resistance. The performance of the lining as a whole depends on the characteristics of the malleability lock. The number and location of a particular connection should be determined by the features of the interaction between the lining and the array. The most common are malleable and articulated joints. Rigid joints prevailed mainly in obsolete designs and were almost out of use.

According to the above description of the structure, the frame support consists of a large number of elements of various functional purposes, which should, interacting with each other and the rock mass, ensure operational stability of the mine in various mining and geological conditions.

The performance, deformation-force characteristics and structural flexibility of metal frame supports, as well as the area of their effective application, entirely depend on the number, location and design and technological efficiency of the joints of their links.

The most common method of force closing the links of frames from special profiles in ductility nodes, which are overlapped, is the use of locks of various designs.

The universally applicable locks of the compliance node consist of brackets formed of rolled steel of cylindrical section, U-shaped with threaded ends, strips with holes and nuts interconnected in such a way that when the massif of rocks is shifted, they slide together while changing the cross section of the frame. The slipping of the links of the flexible frame support in the nodes of compliance depends on the working characteristics of the grooved special profiles of which they are made, and is due to the shape of their cross section and material. The lining links in the interface are fixed with locks with a certain force, the boundary value of which depends on the design features of the locks themselves, their technological design, and the mass-centering characteristics of the special profiles section.

The operation of the flexible arch support in the maintenance mode largely depends on the parameters of the working characteristic of the castle, the main purpose of which is to create stable friction forces between the surfaces of elements from mine special profiles conjugated in the compliance nodes.

This determines the basic requirement for the lining as an engineering structure that ensures the maintenance of mining: mutual sliding of elements formed from special profiles in a supple mode should be carried out with a stable working resistance of the lining, without losing the equidistance of its geometry, the development circuit, with the possibility of perception compressive and bending loads when turning the arch into operation.

Thus, the size and stability of the resistance of the frame of the flexible lining, along with the cross-sectional shape and the material of the special profiles, significantly depends on the design of the locks of the compliance nodes and their functional ability to carry out a force circuit when pairing the component elements.

In the mining and coal industries, mainly two types of locks of ductility nodes — bolt and wedge types — have been used (see B. A. Markovich Mine metal support and methods for its mass production. - M .: Nedra, 1974. p. 7, Fig. 3, p. 8, fig. 4, p. 5, fig. 5). The most widespread are locks of bolt-type compliance knots of three well-known types of industrial processing plants. OZO, ZSD and OZSh-1 (see “Frame support of mine workings. Overview and reference materials.” Donetsk: TsBNTI, DonUGI Gosugleprom of Ukraine, 1992, p. 3-4, fig. 3-a, fig. 3-b, fig. 3-c, see also G.G. Litvinsky, G.I. Gayko, N.I. Kuldyrkaev Steel frame supports for mine workings. - K .: Technique, - 1999, p. 87, fig. 3.9, p. 91, fig. 3.12, p. 92, fig. 3.13).

APZ.OZO lock of the ductile assembly unit of the metal frame ductile lining from mine special profiles includes two clamps, each of which contains a flat bar with holes, and a U-shaped fastening bracket with threaded ends passed through the holes of the bar located between them with an internal and external special profile lap and nuts (see “Frame support of mine workings, overview information and reference materials.” Donetsk: Central Scientific and Technical Institute, DonUGI of the State Coal Industry of Ukraine, 1992, pp. 3-4, fig. 3-a, analog).

This lock is universal, simple structurally and technologically advanced in serial production. However, it, ceteris paribus, has low reliability during operation. The forces arising from the friction of the brackets and straps relative to the moving special profiles and causing the brackets to be skewed are large enough to stretch the brackets and even cause them to break.

In this case, the gap occurs on the most loaded section - in the transition zone from the threaded connection to the cylindrical part of the U-shaped bracket, that is, in the region of the flat bar, which leads to the complete destruction of the lock and, accordingly, the interface unit of the frame support elements. In addition, when the lining is operated in a compliant mode, when the locks are skewed, the insufficiently rigid strip bends, the fastening bracket is pulled out, the lining resistance sharply drops, which also leads to the breaking of the fastening brackets on the threaded ends, the dynamic breakdown of nuts and the destruction of the lock.

The main disadvantage of the lock APZ.OZO is the limited scope of its application by the compliance factor. The design features of the lock do not allow to obtain the required friction force between the mating surfaces of the lining elements when installing it in the compliance node, while the compliance area does not exceed 500 mm. Installing two locks and increasing the length of the pairing of elements (overlapping ends of the links) dramatically complicate the technology of construction, installation of locks, metal consumption and, accordingly, the cost of lining.

Thus, this lock not only does not provide the specified working resistance of the lining in a compliant mode, it has a small size of the compliance area (not more than 500 mm), but it does not even guarantee the integrity of its structure (15-50% of the locks are destroyed, which leads to a loss of working resistance fix it).

The ZSD lock of the compliance node of the metal frame compliant lining from the mine special profiles is a double clamp that contains a curved strip with holes and two interlocked brackets with U-shaped fastening brackets with threaded ends passed through the holes of the curved strip located between them overlapping internal and external special profiles and nuts. The figured bar is made of special profile hire PZS-20. (“Frame supports for mine workings.” Survey information and reference materials. Donetsk: Central Scientific and Technical Library, DonUGI of the State Coal Industry of Ukraine, 1992, p.3-4, fig. 3-b, see also G.G. Litvinsky, G.I. Gayko , N.I. Kuldyrkaev. Steel frame supports for mine workings. - K .: Technics, - 1999, p. 91, fig. 3.12, analogue).

ZSD lock is universal, has sufficient strength and high reliability. However, it has a relatively increased flexibility, which in the operating mode leads to a weakening of the support structure and requires periodic tightening of the nuts, and the need to use a special profile rolled product CCD-20 causes an increase in the range of parts, a decrease in manufacturability, reliability and an increase in cost. In the compliance node of the serial lining, one such lock is provided. Since one such lock provides a very narrow section of the clamping of the mating support elements, the compliance node acquires the function of a hinge during the action of the bending moment and begins to work on the principle of the hinge connection, which is accompanied by a tensile deformation of one of the paired special profiles.

The main disadvantage of the ZSD lock as well as the APZ.OZO lock is the limited scope of its application in terms of flexibility due to design features: a small coverage area, relatively low stiffness and, as a result, a small friction force between the mating surfaces of the lining elements. In total, for the ZSD lock, this does not allow to obtain a compliance value of more than 500 mm. In this regard, for maintenance conditions, if necessary, to increase the value of working resistance and flexibility of the lining, there is a need to install two such locks in the ductility node, which increases the cost of lining, and in traditional arch supports type AP-3, AP-5 (see V.N. .Karetnikov, B. Kleimenov, AG Nuzhdikhin Fastening of capital and preparatory mine workings. Directory. - M .: Nedra, 1989. p. 52, p. 54, fig. 3.4) becomes impossible, since increasing the working resistance of the lining leads to a decrease in its margin of safety and reliability.

The lock OZSH-1 of the ductile compliance unit of the metal frame ductile lining from the mine special profiles includes two clamps, each of which contains a curved strip with holes and a U-shaped mounting bracket with threaded ends passed through the openings of the curved strip located between them with an internal and external special profiles overlapping and nuts (“Frame support of mine workings”, overview information and reference materials, Central Scientific and Research Institute of DonUGI of the State Coal Industry of Ukraine, Donetsk, 1992, p. 3-4, fig. 3-c, analogue).

This lock provides higher reliability of the support operation in compliant mode - the compliance area reaches values of more than 500 mm, but it is not technologically advanced to manufacture and difficult to install. In addition, structurally this lock is less versatile, since the curly strip should have the configuration of the covered special profile, which, due to the large range of special profiles, requires the expansion of the standard size range of curly strips. In addition, this lock is characterized by the elastic-plastic flexibility of the ends of the curved strip, the rotation of its end parts relative to the axis of the mounting bracket within the mounting gap, which leads to eccentric loading of threaded joints in the plane of the bar and nuts. When tightening threaded joints, the ends of the nuts are located at an angle to the supporting planes, and the threaded joints themselves are loaded with both axial force and an additional bending moment. As a result, a complex stress state arises in the threaded joints of the fastening bracket and nuts - tensile with bending, which leads to rupture of one of the threaded ends of the fastening bracket along the inner diameter of the thread, lower load capacity, as well as to a decrease in the level of stability of the working lining resistance as a whole.

Known is the lock of the compliance node of the metal frame compliant lining from mine special profiles, including a bracket and a curved strip with a bevel and a protrusion in contact with the wall of the flange of the special profile ("Malleability lock for lining from the special profile", USSR Author's Certificate No. 1263872, A1, IPC-4: E21D 11/22, authors V.P. Makarov, I.B. Ilyina, Yu.A. Beloglazov, V.Ya. Mininberg, applicants 01/02/1985, publ. 10/15/1986, bulletin No. 38, analogue). This castle is close in design to the OZSh-1 castle, but partially relieved of the above drawbacks. To increase the stability of the working resistance of the lock, the bevel of the bar is made with a tide, and the bar is installed with the possibility of interaction of the surface of the tide with the flange of one of the connected special profiles.

The disadvantages of this lock are low manufacturability, cumbersomeness, high metal consumption and the complexity of the assembly of the ductility node, which increases its cost. This is caused by the fact that the curly strip of the lock, which carries out the power closure of the structure, can only be made of special rolled products of a complex profile. In addition, the curly strip of the castle does not provide stable operation of the compliance unit when the load on the lining changes, nor does it provide a significant amount of compliance. This is explained by the fact that the curly strip of the castle has a complex spatial configuration and technological inauthenticity of the reciprocal sides, which leads to its deformation, loss of operability at high loads and a decrease in the reliability of the compliance node.

Closest to the proposed invention in terms of purpose, number of common features and the achieved result is a lock of the compliance node of a metal frame compliant roof support from shaft special profiles, containing a bar with holes and a U-shaped fastening bracket with threaded ends passed through the holes of the bar located between them lap internal and external special profiles, nuts, as well as stabilizer amplifiers installed between the bracket and flanges of the internal special profile, characterized in that the stabilizer The ribs are made in the form of two hollow, equal-sized prismaticoids, the sides of which are formed by isosceles or rectangular trapeziums, contacting each other with the contours of the larger base, in the upper bases of which holes are formed through which a U-shaped bracket is passed, the lateral surface of one of the prismoids contacts the inclined lateral the wall of the special profile, at the same time the plane of the base of the prismoid is supported by the bar of the castle, and on the diametrically opposite side the plane of the base of of a prismatic prismoid was put into place with a flange of a mine special profile (“Lock of the ductile duct assembly of a metal frame flexible support from mine special profiles”, application for invention of the Russian Federation No. 2009129189/03 of 07.29.2009, IPC E21D 11/22, authors Aliev N.A. ., Akopov S.G., Aliev P.N. Positive decision of the Federal Service for Intellectual Property, Patents and Trademarks (ROSPATENT) on the application of 04/13/2010).

This lock is characterized by higher reliability and lower manufacturing costs compared to the previous design. It implements the power closure of the structure as a whole, eliminates the possibility of bending the strap and, accordingly, the eccentric loading of the bolt connection, leading to the destruction of the threaded end of the bracket and often causing severe injuries and collapse of the lining. In addition, in the castle described, stabilization and an increase in the clamping force of the lining elements in the longitudinal direction — along the contour of the frame — have been carried out, which allows increasing the compliance value in the range of 1000 ... 1200 mm.

This is achieved by the fact that in the lock of the compliance node of the metal frame lining from mine special profiles, containing a bar with holes and a U-shaped fastening bracket with threaded ends passed through the holes of the bar, the internal and external special profiles lapped between them, nuts, stabilizer amplifiers according to the invention, made in the form of two hollow equal-sized prismatoid, the sides of which are formed by rectangular or isosceles trapezoid contacting each other with the contours of a larger and bases, in the upper bases of which holes are formed through which a U-shaped bracket is passed, the lateral surface of one of the prismoids is in contact with the inclined side wall of the special profile, while the base plane of the second prismatic is supported by the lock bar, and the base plane of the other prismatic from the diametrically opposite side inserted into the spacer with the flange of the mine special profile (“Lock of the ductile duct assembly of the metal frame compliant lining from mine special profiles”, application for the invention of Ro sian Federation №2009129189 / 03 dated 29.07.2009, IPC E21D 11/22, Aliyev authors NA Hakob SG Aliyev PN Positive decision of the Federal Service for Intellectual Property, Patents and Trademarks (ROSPATENT) on the application of 04/13/2010). The elastic conjugation of each of the prismaticoids between themselves by the support faces, which form the largest of the bases along the contour in the mid-section of the amplifier-stabilizer, makes it possible to compensate for the non-uniformity of the longitudinal load on the compliance node, to increase the contact of the elements along the flanges of the special profiles in the longitudinal direction along the frame, with an increase in the flexibility of the support in limits of 1000 ... 1200 mm.

Thus, in the said patent, the problem of ensuring the rigidity of the frame in the longitudinal direction with a partial increase in its compliance while ensuring the elastic-deformation characteristics of the lock of the compliance unit and the stability of its operation in the lining is solved.

However, the proposed solution is structurally and technologically difficult: to create a closed spatial amplifier-stabilizer system, a special cutting of the blank of each of the elements forming the lock is required (Application for the invention of the Russian Federation No. 2009129189/03 of July 29, 2009, IPC E21D 11/22, Positive decision of the Federal Service for Intellectual Property, Patents and Trademarks on the application of 04/13/2010). It also requires complete authenticity in the location and spatial orientation of the mutually forming surfaces of the parts of the amplifier-stabilizer, which requires special technological equipment, deterministic assembly methods with the orientation of the castle elements in the lining.

In addition, the uncontrolled tightening of the nuts of the lock connection due to the high rigidity of the stabilizer amplifier according to this invention can create the conditions for the transition of the flexible support to the hard mode of operation and cause its complete destruction. Of no small importance is the fact that during load shedding due to the impossibility of absolutely equal application of the tightening torque to each of the threaded joints during pereperelivnii, the locks are twisted and, accordingly, the bracket is pulled out, which can also lead to the destruction of the lining.

Information disclosing the essence of the invention.

The basis of the invention is the task of improving the lock with the design of the amplifier-stabilizer, improving its manufacturing technology, increasing the flexibility of the lining up to 1500 mm by introducing shock absorbing elements into the flexibility node in the form of two hollow unequal prismoids, the end faces of which are formed equal-sized, of the same height by trapezoid, and in in the mid-section, the base area of the upper prismatic refers to the base area of the lower prismatic as 3: 1.

Such a design of the lock of the arch support ductility node formed by the stabilizer amplifier made in the form of two hollow unequally-prismatic prismoids with the ratio of the areas of their bases as 3: 1, and the end faces in the form of equal-sized trapeziums of the same height, forms a spatial, elastically deformable system that allows to carry out a power closure of the structure, while simultaneously increasing the contacting force on the flanges of the special profiles and distributing it along the frame in the longitudinal direction, which minimizes zmozhnost convergence locks under load, and increases the pliability of lining up to 1500 mm. At the same time, the reliability and stability of the lock in compliance mode increases, the probability of locks coming closer under load is minimized, which is the main factor in increasing the support lability to 1,500 mm, and the possibility of transitioning the arch support to hard mode also decreases.

The problem is solved in that in the lock of the compliance node of the metal frame support from mine special profiles, containing a bar with holes and a U-shaped fastening bracket with threaded ends passed through the holes of the bar located between them, the internal and external special profiles overlapping, nuts, amplifiers the stabilizers according to the invention are made in the form of two hollow unequal-sized prismoids, the end faces of which are formed equal-sized, of the same height by trapezoid contacts in contact with each other large bases, while the base area of the upper prismatic refers to the base area of the lower prismatic as 3: 1. Holes are formed in the opposite supporting bases of each prismaticoid, through which a U-shaped bracket is passed, and the lateral surface of the larger one is in contact with the inclined side wall of the special profile, while the base plane of the second prismoid rests on the lock bar, and on the diametrically opposite side the base plane more of them were put into the spacer with the flange of the mine special profile.

This technical solution of the amplifier-stabilizer of the lock allows you to form it from two elements that are technological in the manufacture, assembled without welding operations, and its elastic-flexible characteristic contributes to springing and locking of the threaded connection, eliminating the bending of the strap, the probable transition of the lining to hard mode with simultaneous implementation a selection of gaps and technological imperfections of special profiles with a power circuit of the system.

In the compliance mode, with possible movement of the frame links relative to each other, the lateral surfaces can change the angle relative to the meridional plane of the prismaticoid, acting as a shock absorber, contributing to the redistribution of the loads acting on the compliance node, both in the transverse and longitudinal directions, compensating and smoothing them in the mode reset with the exception of the possibility of skewing the lock. The implementation of the power closure of the structure through such a design of amplifier-stabilizers with an increase in the contacting force on the flanges of the special profiles in the interface section and its distribution along the frame in the longitudinal direction creates the possibility of increasing the lining compliance up to 1500 mm.

If necessary, in order to maintain workings with difficult geomechanical conditions, a change in the stiffness parameters of the lining as a whole or directly of the locks of the compliance node can be carried out by varying the thicknesses of the forming surfaces and the tilt angles of the sides of the prismaticoid.

An increase in the elastic-pliable properties and working resistance in the compliance nodes can also be achieved by filling the inner space of the prismaticoids with an elastic filler, for example, high-strength rubber or other material that has an elastic characteristic and is resistant to fire (to comply with the safety rules for mining operations).

This technical solution allows you to stabilize the process of operation of the locking joints in the compliance nodes, in load shedding mode, eliminates the operating conditions of the system, leading to misalignment of the locks and, accordingly, determines the possibility of an increase in clamping force by 35-40%. The possibility of skewing the lock with this solution is excluded due to the fact that the contact of the side surface of the prismaticoid with the side wall of the special profile occurs on a plane, which reorientes the contact loads in the mating zone of the parts, smoothes out the unevenness of their distribution, and stabilizes the operation of the castle joint. That is, the use of such an element in the locks makes it possible to replace the higher kinematic pair with the lower one (II Artobolevsky. Theory of Machines and Mechanisms. Ed. 3. - M .: Nauka, 1975. 10, p. 45) creates the conditions for load distribution in the zone of contact and relative sliding of the interface elements in the power circuit of the structure without turning it around the U-shaped bracket, as a result of which the lock is skewed with jamming it when the load is relieved.

The above characteristics characterizing the invention are essential, since in the aggregate they are sufficient to ensure operability and achieve the technical problem being solved, and each separately is necessary to identify and distinguish the claimed castle from similar solutions known in the art.

Thus, a new set of common (known) and distinctive (new) from the prototype of the essential features that characterize the new castle is sufficient in all cases to which the scope of legal protection applies, since it solves the problem.

The indicated features characterizing the invention are not mandatory, but, according to the applicant, are the best and do not exclude the possibility of another specific equivalent execution of the castle within the specified essence of the invention.

The causal relationship of the distinctive (new) features in their interaction with the known (common) features in providing new properties of the object of the invention, due to the technical task, is as follows.

Due to the fact that the lock contains elastically pliable elements - stabilizer amplifiers, made in the form of two hollow unequal-sized prismoids, the end faces of which are formed equal-sized, of equal height by trapezoid contacting the contours of large bases, the area ratio of which is 3: 1 , and in the opposite bases of the prismaticoid holes are formed for the U-shaped bracket, by means of which the power stabilizers are locked with the lock bar and the special profile flange, which ensures ivaetsya work on the perception of the longitudinal load lock and a significant increase in the magnitude node pliability.

In addition, this arrangement of the amplifier-stabilizer creates the possibility of springing and locking of the threaded connection, the selection of gaps and technological imperfections of the profiles, increases the reliability and stability of fixation of the lock connection, eliminates the misalignment of the lock.

Therefore, with the same lock tightening force, relative to standard ones, the friction force increases and stabilizes between the inclined side wall of the internal special profile and the side surface of the prismaticoid, which forms a stabilizer amplifier, between the surfaces of the internal and external special profiles, and also between the U-shaped bracket and special profile flanges, which also increases the stability and reliability of the lock. In the load shedding mode, the contacting lateral surfaces of the stabilizer with the lateral surfaces of the special profile due to the elastic-flexible system carry out relative slippage while maintaining the clamping force in the compliance node without distortion and jamming of the lock.

To avoid slipping between each other, at the ends of the side surfaces of the prismaticoids, connecting elements are formed in the form of grooves mating with the protrusions, or articulated joints eliminating the relative movement of the parts between each other.

The invention is further explained in the detailed description of an example of a specific implementation of its best option with reference to the accompanying drawings.

The list of drawings of the invention.

Figure 1 shows the lock of the compliance node of the metal frame ductile lining of mine special profiles; general view, side view; the elements of the amplifier-stabilizer are made in the form of two hollow unequal-sized prismoids, the end faces of which are formed by equal-sized trapeziums of equal height, in contact with each other by the contours of the larger of the bases, in the upper bases of which holes are formed through which a U-shaped bracket is passed, and the side surface of the upper is made of prismatic in contact with the inclined side wall of the special profile, at the same time, the end plane of the base of the lower prismatic is supported by the lock bar, and with On the opposite side, the end plane of the base of the upper prismaticoid is inserted into the spacer with the flange of the mine special profile, which ensures an elastic-flexible force circuit of the assembly.

Figure 2 shows the lock of the compliance node with stabilizer amplifiers, made in the form of two hollow unequal-sized prismaticoids, the end faces of which are formed by equal-sized trapezoidal equal height, in contact with each other by the contours of the larger of the bases, in axonometric projection.

Figure 3 shows, in axonometric projection, the locking element element of the ductile metal support latch assembly is a stabilizer amplifier made in the form of two hollow unequal prismatic prismoids, the end faces of which are formed by equal-sized trapeziums of equal height, contacting the contours of the larger of the bases:

a) an embodiment of the prismatoid amplifier-stabilizer in contact with each other by the contours of the larger of the bases in the form of a connection with spikes, screenshot;

b) a variant of the implementation of the prismatoid amplifier-stabilizer in contact with each other by the contours of the larger of the bases with a spherical swivel, screenshot.

The list of designations and names of the elements of the invention.

1. Planck

2. The hole in the bar

3. U-shaped mounting bracket

4. Threaded end of the mounting bracket

5. Internal shaft special profile of frame compliant lining

6. The outer mine special profile frame compliant lining

7. Nut

8. Upper prismatic

9. Lower prismatoid

10. The hole in the upper prismatic

11. The hole in the lower prismatic

12. The plane of contact of the bases of the upper and lower prismatic

13. The side of the upper prismatic

14. The side wall of the external special profile frame compliant lining

15. The end plane is the base of the upper prismatoid.

16. Flange of the outer special profile of the frame compliant lining

17. The flange of the internal special profile frame compliant lining

18. The end plane - the base of the lower prismatic

19. Curly spikes of the side of the prismatic

20. Curly grooves on the side of the prismatoid

21. The spherical protrusion of the hinge of the side of the prismatoid

22. The spherical cavity of the hinge of the side of the prismatoid

23. The connecting slope of the side of the upper prismatic

24. The end face of the upper prismatic.

25. The end face of the lower prismatic.

Information that confirms the possibility of carrying out the invention.

The technical solution of the lock described above makes it possible to form a closed power structure that plays the role of a stabilizer amplifier in the lock of the compliance node, which creates a hard power lock of the lock with simultaneous springing and locking of the threaded connection, which ensures increased stability and reliability of its operation in the compliance mode. Due to the growth of the contacting force on the flanges of the special profiles at the interface section of the lining elements and its distribution along the frame in the longitudinal direction, the possibility of increasing the lining compliance up to 1500 mm is created.

The lock of the compliance node of the metal frame ductile lining from the mine special profiles (Fig. 1) contains a strap 1 with holes 2, a U-shaped fixing bracket 3 with threaded ends 4, passed through holes 2 of the strap 1, overlapping between them, inner and outer special profiles 5 and 6, nuts 7, as well as stabilizer amplifiers, made in the form of two hollow unequal-sized prismatoids - the upper 8 and lower 9, the end faces of which are formed by trapezoidal equal-sized equal heights, with holes 10 and 11 in the base planes for mounting them on a bracket.

The prismaticoids are mounted on the rod of the U-shaped bracket 3 so that both prismaticoids are in contact with each other by the contours of the larger base 12, and the stabilizer amplifier contacts the lateral side 13 of the upper prismaticoid with the side wall 14 of the outer mine special profile 6. At the same time, the upper end plane -the base 15 of the upper prismatoid 8, on the one hand, is inserted into the spacer with the flange 16 of the external special profile 6, and the diametrically opposite end plane-base 18 of the lower prismoid 9 is in contact with the bar 1 st node compliance castle.

To increase the elastic-compliant characteristics and functioning of the stabilizer amplifiers in the mode of dumping and leveling the load on the frame, the lateral surfaces forming the prismoid are inclined to the axis of the U-shaped coupler at an angle α and brought into contact with the side surface of the special profile. Moreover, such a design of the contacting of the side surfaces 13 of the prismaticoids, in contrast to the known stabilizer amplifiers, makes it possible to compensate for the load on the frame both in the transverse and longitudinal directions (along the frame). And as a result, conditions are created for increasing the clamping force of the lock in the compliance node with an increase in the compliance value up to 1500 mm.

Figure 2 shows the lock of the compliance node described above in axonometric projection, which shows the outer 6 and inner 5 special profiles, U-shaped bracket 3, prismoids 8 and 9, the end faces of which are formed by equal-sided trapeziums, are installed in the end face planes-bases 15 and 18 respectively, on the flanges 16 and the strap 1 of the lock, with the simultaneous contact of the side surface 13 of the upper prismatoid 8 and the side wall 14 of the outer special profile 6.

On figa shows a screenshot of the elements of the lock node compliance ductile metal lining - amplifier-stabilizer, made in the form of two hollow unequal prismatic prismoids of the upper 8 and lower 9, the end faces of which are formed by isosceles trapezoid, and the contacting surfaces are made in the form of spikes 19 for mounting in the reciprocal grooves 20, excluding the possibility of shifting them under load and violation of the pairing.

On figb shows a screenshot of the execution of the elements of the lock node compliance ductile metal lining - amplifier-stabilizer made in the form of two hollow unequal prismatic prismoids - the top 8 and bottom 9, the end faces of which are formed by equal-sized trapezoid, and the contacting surfaces are made in the form of a mutually reciprocal spherical hinge 21 and 22, also eliminating the possibility of shear of parts under load and malfunction.

The lock node compliance metal frame ductile lining of mine special profiles works as follows. When erecting support for its links, special profiles 5, 6 of the frame are lapped and connected with locks at the nodes of compliance.

Special profiles 5, 6 at the nodes of compliance are compressed by locks with a certain force, the boundary value of which depends on the design features and the capabilities of the locks themselves.

In the process of formation of a zone of inelastic deformations around the working out contour, a comprehensive external compression of the lining by disturbed rocks occurs. When the rock pressure exceeds the resistance of the support lining, special profiles 5, 6, fastened with locks in the nodes of compliance, under the action of the displacement of the rock mass slide relative to each other, resulting in a change in the geometric contour and the cross section of the frame. At the same time, the required geomechanical balance of the lining-mass system is established, which is ensured by the forces of friction, that is, by the resistance forces of the locks in the nodes of compliance of the lining. In the process of supporting the lining in a compliant mode, this process is constantly repeated until the geomechanical equilibrium of the lining-array system is established in a new state. The work of compliant lining largely depends on the parameters of the working characteristics of the lock, the main purpose of which is to create stable friction forces between the surfaces of special profiles 5 and 6 conjugated in the nodes of compliance, while the mutual sliding of special profiles 5, 6 in compliant mode should be carried out with the provision of stable working resistance, which is required from compliant lining, but not exceeding the bearing capacity of the frame.

The new design of the stabilizer amplifier, consisting of prismaticoids 8 and 9, assembling and installing them in a spacer with an emphasis on the side wall 14 of special profile 6 allows you to create a technological, closed design that provides power closure of the lock, springing and locking the threaded connection, while simultaneously selecting gaps and technological imperfections of special profiles. The consequence of such a technical solution is an increase in the contact force on the flanges of the special profiles at the interface section of the lining elements and its distribution along the frame in the longitudinal direction with an increase in lining compliance up to 1500 mm.

Thus, on the basis of the proposed improvement of the castle, it is possible to obtain a power, geometrically unchanged design and completely block the skew of the strap 1 and the fastening U-shaped bracket 3 during the process of settling the lining under the influence of rock pressure, while improving the manufacturing technology of the elements of the castle, increasing the flexibility, as well as simplifying installation and operation.

Such a technical solution significantly increases the reliability of the compliance nodes, provides a predetermined lock tightening force, stability of the lining working resistance over the entire range of its structural compliance. Moreover, the lock has a construction not complicated for mass production, which is characterized by a low manufacturing cost. In the manufacturing process of manufacturing elements of the amplifier-stabilizer, it is not necessary to use a wide range of accessories and dies, since in all cases the amplifier-stabilizer of the lock is formed from one unified part-prismoid made of sheet steel by stamping in the absence of welding, and organization of orientation is not required elements when assembling the castle. At the minimum cost of modernization, the total cost of the castle increases slightly and is offset by increased reliability, durability and safety of work with an increase in the load on the lava. In addition, conditions are created for a reasonable increase in the pitch of the lining frames - spacing, which significantly reduces the overall metal consumption for production while maintaining high reliability.

The invention is not limited to the embodiments described and shown in the drawings, but can be modified, modified and supplemented within the scope defined by the claims.

The invention was tested during bench tests, as well as in mine conditions. The test results fully confirmed its technical and economic efficiency and the feasibility of widespread use. A ductile lock of a metal frame ductile lining from mine special profiles can be made in industrial production at any ore repair or other plant and can be widely used in coal, mine, shale mines to increase the reliability of the lining as an engineering structure and the safety of mining operations.

Claims (1)

The lock of the compliance node of a metal frame ductile lining from mine special profiles, containing a bar with holes, a U-shaped mounting bracket with threaded ends passed through the holes of the bar located between them overlapping internal and external special profiles, nuts, and also stabilizing amplifiers installed between the strip and flanges of the external special profile, characterized in that the stabilizers are made in the form of two hollow unequal-sized prismoids, the end faces of which are formed equal-sized, identical trapezoidal height, in the mid-section, the base area of the upper prismaticoid refers to the base area of the lower prismaticoid as 3: 1, the contact of the prismatic is carried out by the contours of the larger ones, and holes are formed in the end planes - the bases of the upper and lower prismaticoid a shaped bracket, while the lateral surface of the upper prismoid contacts with the inclined side wall of the special profile, while supporting the end plane - the base of the lower prismoid in the plank the lock, and on the diametrically opposite side of the upper end plane prismatoid base introduced into the thrust flange silo special profile.

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