RU2232897C1 - Ceiling of section of mechanized support - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: ceiling includes engaged upper part and screen with contacting surfaces, assemblies of fixing screen to upper part. Contact surfaces are made of guides slanting to ceiling plane, and curvilinear supports perpendicular to longitudinal axis of ceiling, and contact surfaces are placed symmetrically relatively to longitudinal axis of ceiling and in staggered order relatively to connecting line of screen and upper part provided with fixing assemblies. Guides may be placed slantingly to longitudinal axis of ceiling and may be made straight or curvilinear on the side of curvilinear supports. Fixing assembly of screen to upper part may be made in form of pipe, inside which an axis is inserted with link mounted on it, end of which has thread, or may be made of round bars and wedge interacting with it, and of nut with spherical surface being part of conical socket, and of lock-nut.

EFFECT: higher reliability of operation, longer life of support and simplified maintenance operations.

6 cl, 8 dwg

Description

The invention relates to the development of mineral deposits by an underground method, namely, to mechanized supports of treatment plants and aggregates for the extraction of low-power formations.

The inventive overlap allows to increase the spacer force and the resistance of the bottomhole part of the overlap of the mechanized lining, equivalent to a solid hard overlap, while maintaining the minimum dimensions of the overlap in height, as well as to reduce the minimum structural height of the lining section and, accordingly, the lower limit of the removed thickness of the formation, to improve the condition of the roof in the bottomhole slaughter, increase the technical level and maintainability of overlapping sections of powered roof supports.

At the same time, the conditions for the best transportation of the lining sections are preserved during installation and dismantling.

This goal is achieved in that the overlap of the section of the powered roof support includes a docked top and a visor with contacting surfaces, nodes for attaching the peak to the top. The contacting surfaces are made of guides and curved supports inclined to the plane of overlap, perpendicular to the longitudinal axis of the overlap, and the contacting surfaces are symmetrically relative to the longitudinal axis of the overlap and staggered relative to the junction of the visor to the top equipped with attachment points.

Guides can be located obliquely to the longitudinal axis of the overlap. The attachment of the visor to the top is made in the form of a pipe, into which an axis is inserted with an earring mounted on it, the end of which has a thread, and nuts with a spherical surface included in the conical socket, and locknuts. The attachment of the visor to the upper can be made of rolled round section and a wedge interacting with it.

It is known that the section of the mechanized roof support (patent RU No. 2058488, E 21 D 23/08) is provided, equipped with a two-arm lever, the blocking arm of which is shorter than the bottomhole one, the two-arm lever is pivotally mounted between the hinge axes connecting the top with the console and is located in U-shaped a cross-section of overlapping openings made open at the bottom along the console and the upper.

The disadvantages of this solution is the placement of the hydraulic jack in the ceiling vertically, which reduces the possibility of reducing the thickness of the upper, since the hydraulic jack protruding from it negates the decrease in this size.

In addition, the placement of the hydraulic jack in the hole made in the support beam reduces the structural strength, and given that the increase in size with a small pull-out power to increase the strength of the overlap is unacceptable, the operation of such overlap will be difficult due to a decrease in the cross section of the working space.

In the known technical solution (patent RU No. 2169267, E 21 D 23/06), the overlap has an upper with support wedges, a visor pivotally connected to the upper, a visor control cylinder. The Verkhnyak has a pocket open at the bottom, in which a visor is made, made with a downhole console, and support wedges installed parallel to the longitudinal axis of the upper.

This design of the connection of the visor with the upper due to the support wedges installed in the upper and controlled by hydraulic cylinders can provide a significantly greater load-bearing capacity of the visor, but uneven continuous hard overlap. There is a contradiction between the need to reduce the angle between the working faces of the wedge, thereby increasing the bearing capacity of the overlap, and increasing this value of the angle to the minimum so as to prevent wear on their surfaces and scoring. This leads to an increase in resistance to friction, which prevents the ability to adjust the visor position.

The closest to the claimed technical essence and the achieved result (patent SU No. 1529839 A1, C, E 21 D 23/04) is the overlap of the section of the powered roof support, including the top and the visor connected by a hinge, the curved protrusions of which are installed in curved grooves of the same radius, made in the upper, equipped with eyes secured to the visor with a beam, on one end of which there are curved protrusions located in the curved grooves of the upper, the other end of which is fixed to the eyes to yrka with the fingers, and gidropatronom mounted on the overlap to engage with the end of the beam, wherein the protrusions are curved with additional supporting protrusions having a cylindrical outer surface, and its radius equal to the radius of curved grooves.

The disadvantages of this device are the point contact of the convex part of the hydropatron rod and the end of the beam and the resulting significant contact stresses leading to premature wear and scoring of the contacting surfaces and, as a consequence, increased resistance when raising and lowering the visor.

Fastening the visor to the intermediate link - the removable beam - with the help of fingers inserted into the eyes, weakens the structure and reduces the permissible loads on the visor.

A hydraulic cartridge with a small piston diameter (due to limited dimensions on the thickness of the overlap) and the maximum possible pressure setting of the safety valve cannot hold the same load as a solid rigid overlap, and at the same time provide a favorable distribution of forces in the bottomhole support zone.

This problem is solved according to the invention by using the inventive overlap of the section of powered roof supports and the features given in the claims.

The essence of the proposed technical solution is illustrated in 8 figures.

Figure 1 shows a fragment of the overlap of the section of powered roof supports, bottom view;

figure 2 is the same fragment of the overlap, but the visor is undocked with the upper;

figure 3 is a view a in figure 1;

figure 4 is a section bB in figure 1;

figure 5 is a section bb in figure 1, where the mount has a pipe;

in Fig.6 is a section GG in Fig.1, where the guide is straight;

in Fig.7 - section bb in Fig.1, where the attachment point is round rolled with a wedge;

in Fig.8 is a section GG in Fig.1 with a curved guide.

The overlapping of the section of the powered roof support is made as a joint hingeless, consisting of the upper 1 and the visor 2 docked with it, having overlapping symmetrically relative to the longitudinal axis 3 and staggered relative to the joint 4 of the visor 2 with the upper 1, the contacting surfaces 5 and 6, which are one side curvilinear support 7, on the other hand, the inclined surface of the guide 8, located at an angle α relative to the longitudinal axis 3 of the overlap.

In the area of each contacting surface 5 and 6 there is a mount unit 9 of the visor with the top, for which an axis 11 is inserted inside the pipe 10, on which an earring 12 is inserted, having a thread 13 at the cylindrical end.

The threaded end of the earring 12 enters the conical socket 14, that is, if the axis 11 is on the visor, then the conical socket (hole) is in the top, if the axis is on the top, then the conical socket is in the visor, where it is fixed with a nut with a spherical surface 15 with the side of the end facing the conical socket and the lock nut 16, thereby forming a connection of the visor 2 with the upper 1 with the "imaginary center" of rotation, which is located on the side opposite to the vertical load acting on the overlap.

If it is necessary to install the visor at the same level with the upper in the common plane of the overlap α or at an angle to the surface of the upper (see Fig. 3, above - dimension d or lower - size c), the visor rotates around the "imaginary center" of rotation of the joint, the contact surfaces 5 and 6 of curved supports 7 along inclined guides 8.

Setting the position of the visor relative to the upper and protection from undocking the visor with the upper is carried out by the attachment points 9.

In this case, the earring 12 tightens the axis 11 by screwing a nut with a spherical surface 15 at each junction. The more the nut with the spherical surface 15 is screwed onto the earring 12, the higher the visor 2 rises relative to the top 1 (see Fig. 3) from size c to size d until the clearance m is completely eliminated (see Fig. 4).

During operation, when the formation roof presses on the visor, the friction contact surfaces 5 and 6 on the shoulder α (see Fig. 6) and the earring 12 with a nut with a spherical surface 15 absorb this load.

The external load that raises the visor 2 relative to the upper tower 1 is perceived by their metal structures after the gap m between the peak 2 and the upper 1 is selected.

Moreover, the magnitude of the lift visor relative to the upper is dependent on the actual value of the gap between the metal structures of the visor and the upper.

In addition (see Fig.7), the mount 9 of the visor 2 to the top 1 can be made of rolled round section 17, which is pressed against the inclined guide 8, forming contact surfaces 5 and 6, using a wedge 18 having a cylindrical end the thread on which the nut with the spherical surface 15 and the lock nut 16 are screwed, and bursting between the support of circular cross section 17 and the metal structure to which the conical socket 14 belongs.

In addition (see Fig. 8), the contact surface 6 of the inclined guide 8 can be made curved with a radius greater than the radius of the curved support 7.

During the operation of the overlap of the powered roof section, the force from the roof pressure in the bottomhole zone tends to lower the visor down to position c (see FIG. 3) relative to the general plane of the overlap α due to the rotation of the visor 2 around the upper frame 1 along the contact surfaces 5 and 6 around the imaginary center "and loading attachment points 9 visor with the upper.

The visor is raised in advance by a dimension d with respect to the common floor plane α with the help of attachment points that prevent it from dropping below the level of the general floor plane.

Thus, the size along the height of the bottomhole space in the lava is not reduced, providing passage and placement of the combine and conveyor, which is very important when working in low-power formations.

In addition, a visor raised relative to the common plane in combination with a bearing capacity equivalent to a solid rigid overlap improves the condition of the bottomhole zone in the lava.

At the same time, there remains the possibility of undocking the visor and the upper and the convenience of installation and dismantling work and transportation of the lining section in the cramped conditions of underground workings.

Claims (6)

1. Overlap of the section of powered roof supports, including the docked top and the visor with contacting surfaces, the attachment points of the visor to the top, characterized in that the contacting surfaces are made of inclined guides to the plane of overlap and curved supports perpendicular to the longitudinal axis of the overlap, and the contacting surfaces are symmetrically relative to the longitudinal axis of the overlap and in a checkerboard pattern - relative to the junction of the visor to the top, equipped with attachment points. 2. The overlap according to claim 1, characterized in that the guides are inclined to the longitudinal axis of the overlap. 3. The overlap according to claim 1, characterized in that the guides are made rectilinear. 4. The overlap according to claim 1, characterized in that the guides are made curved from the side of the curved supports. 5. The overlap according to claim 1, characterized in that the attachment of the visor to the top is made in the form of a pipe, into which an axis is inserted with an earring mounted on it, the end of which has a thread, and nuts with a spherical surface included in the conical socket and lock nuts . 6. The overlap according to claim 1, characterized in that the attachment site of the visor to the top is made of rolled round section and a wedge interacting with it.

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