RU2398970C1 - Powered support for steep beds - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: powered support for steep beds of medium thickness includes basic column separated into basic sections, every of which consists of front and goaf walls with hydraulic stands of stay brace and jacks of correction, and linear sections, every of which consists of hydraulic stand with beam and support slab, capsule - equipment compartment, roller supports and boot. Basements of front and back walls of basic section are separated into three telescopically joined parts with the possibility of their sliding by correction jacks, at the same time their middle parts are connected by means of cross bar, in slots of which there are roller support of linear section with the possibility of its displacement after unloading.

EFFECT: increased stability and improved displacement of support.

2 cl, 3 dwg

Description

The invention relates to the coal industry, in particular to the field of mechanized fastening of mine workings during the extraction of coal from the average power of steep seams.

The relevance of the invention:

“... the creation of effective means of mechanization for coal mining from steep seams is a very difficult scientific and design problem, not only in Russia but also abroad.

To date, no effective technology and safe technology for mining steep formations has been created. Therefore, in many coal-mining countries, such layers are not practiced, but preserved.

The problem of creating integrated mechanization tools for mining steep seams remains relevant for the Kuzbass ”(from documents of the Kuzbass Coal Industry and Energy Department).

Known treatment plants of the type KM87, KM88, KMT, OKP, KM103, including roof support sections, SECTION BEAMS guides connecting the conveyor belt to the roof support sections, the BASIS of the complex in the form of a conveyor stand and a excavating organ (1, V. Khorin, Development of technology for underground mining of coal, potash and manganese ores. - M .: Nedra, 1985 p.148-167). These are powerful, high-performance complexes with stable mechanized supports working at dip angles of 10-15 degrees.

With the use of additional devices (KM87DN, OKP-70 complexes, the field of application of such complexes can be expanded in angle of incidence to 35 degrees.

Modern unified complexes of a new technical level are known, such as KM137, KM138, KM142, KM143, KM144, designed for flat coal seams with an angle of incidence of up to 35 degrees (2, A. Orlov and others. Fixing and control of the roof in complex mechanized treatment faces. - M .: Nedra, 1993, p. 217-279).

All of these complexes cannot be used on inclined and steep seams with a bed angle of more than 35 degrees and with deserted coal mining.

On a steep fall, the lining is prone to slipping and tipping over towards the fall.

The search for a support mechanism for stabilization is carried out in various directions.

The well-known Dolinsky MKD complex with mechanized support (3, patent No. RU 2276729 C1, E21D 23/00 dated 04.10.2004, Bull. No. 14, 05.20.2006).

Complex for inclined and steep formations of the MKD, including the complex becoming, a shearer, a control system and support sections, each of which contains an overlap with a visor that can rotate 180 degrees to the bottom, a guard, racks and a base associated with becoming a motor jack and SECTIONAL GUIDE, characterized in that the base of the lining section is made uniform for the section and is equipped with a VERTICAL BRACKET AND EARRINGS located in the plane of symmetry of the base, sectional guide it remains from TWO HINGED BEAMS with three mutually parallel hinges, the fingers of which are parallel to the surface of the soil and the face, with the front beam connected to the front hinge by the stave, the middle hinge to the rear beam, the rear beam to the other end connected to the vertical bracket base, and the motor jack of the lining section is connected at one end to the middle hinge of the beams, and the other end is connected to the eyes of the base.

The disadvantages of supporting the MKD complex are as follows. The system of stabilization of sections in a plane perpendicular to the plane of the stand, two guide beams with a vertical bracket along the shoe and with a stabilizing jack along the upper shaft eliminates or reduces the tendency to tilt the sections to the bottom or from the bottom, but it does not prevent the turn, tilt and slide towards the dip of the formation.

SLIPPING, skewing and tipping are facilitated by the NON-RESISTANCE OF THE BASIC BEAM TO THE SOIL OF THE FORMATION especially when the water content of the soil (natural or during irrigation), vibration of the excavating organ with weak lateral rocks (domes above the upper parts and burrowing of the shoe into the soil of the formation).

Known mechanized lining for steep dip layers (4, RU 2324820 C1), adopted as a prototype.

It includes a base stand, divided into base sections, each of which consists of a front and block wall with hydraulic struts of a thrust and shanks connecting the front and block walls along the soil of the formation, and linear sections, each of which consists of a hydraulic stand with an upper and a base plate, which are mounted on roller bearings mounted to move inside the shanks of the base section, characterized in that the linear sections contain a capsule with stiffeners and coated with porous rubber or polymer onto The hydraulic stand with the upper and base plate rests, and the roller bearings are attached to the capsule, and the capsule is made with a thickening of the bottom in the form of a shoe. For the convenience of servicing the control equipment located in the capsule, along the front wall of the base section there is a human walker with an air duct creating a back-up of readable air both inside the walker and inside the capsule - the hardware compartment.

The disadvantages of this mechanized lining is the following.

1. During the correction of the lining with the rise in rebellion, all the supporting posts of both the base and linear sections are unloaded for a moment, which increases the likelihood of slipping, skewing or tipping over.

2. Placing roller bearings inside shanks can lead to their filling and jamming.

The OBJECT of the INVENTION is to further increase stability and improve the mobility of the lining on a steep fall by changing the layout of its nodes and the correction mechanism.

This goal is achieved by the fact that the bases of the front and rear walls of the base section are divided into three parts telescopically connected to each other, and their middle parts are connected by a traverse, in the grooves of which are mounted roller bearings of the linear section. The bottom of the capsule - the hardware compartment has a thickening in the form of a curved shoe that borders the traverse with roller bearings. Moreover, due to the shock-absorbing device of the roller support, the clamp does not clamp.

This arrangement allows, if necessary, adjusting the lining and lifting it along the uprising of the formation, to carry out this process in three steps, while maintaining part of the hydraulic pillars in the open state. This ensures the stability of the lining throughout the entire excavation cycle.

Control electronics must be protected from vibration, such as coating the capsule body with a layer of porous rubber or polymer.

The invention is illustrated by drawings.

Figure 1 shows a vertical section of the lining section, figure 2 is a view of the lining from above with a slit; figure 3 is a side view of the lining with a local incision.

The linear section consists of a water-resistant strut 2 with the top 1, a base plate 3 and a strong capsule 4 with stiffeners, coated with rubber or polymer and having a thickening of its lower part in the form of a figure-shaped shoe 5 bordering the roller support 6 with a shock absorber 7 installed in the grooves traverses 8.

The base section consists of a front and rear walls kinematically connected in the center between each other with a traverse 8, on which a linear section with roller bearings is mounted. The base of the front wall is divided into three parts: the upper 9, middle 10 and lower 11, and the upper and lower parts, telescopically connected with the middle, can be extended together with the struts 12, 13 correction jacks 14, 15. The design of the rear wall is similar to the front and defined by positions 16-22 (see figure 3).

The base and linear sections are kinematically connected with each other by a traverse 8 and two moving jacks 23, 24.

Progress of work.

The extraction cycle begins with the destruction of coal in a physical way such as a laser, ultrasound or a jet of high pressure water. The mining control equipment is located in capsule 4. Coal is delivered by gravity along a lava at a steep fall.

As coal is mined, the base section with support (if stability of the side rocks allows) is supplied to the face by jacks 23, 24. At the same time, crosshead 8 freely slides under the linear section, the pressure of which is perceived by the shoe and transferred to the formation soil. Then the hydraulic pillars of the base section 12, 13, 16 and 22 are bursting, and the hydraulic pillar 2 of the linear section is unloaded. In this case, the shock absorbers 7 raise the linear section together with the shoe 5, transferring its weight to the roller bearings 6, and the linear section is pulled by jacks 23, 24 to the front wall of the base section, moving on the roller bearings along the beam 8. After that, the linear section 2 is bursting into lateral rocks.

This method of moving the lining is especially effective in weak, prone to swelling soil.

If it is necessary to correct the support as a result of its sliding or changing the length of the lava due to kinks and fluctuations in the angle of incidence of the formation, the support structure allows you to move the sections along the uprising of the formation one by one, starting from the top.

The process begins with the unloading of the hydraulic struts 12, 16 of the upper parts of the bases of the front and rear walls of the base section and the extension of these parts by rebellion with correction jacks 14, 18. After that, the hydraulic struts 12, 16 are bursting in a new place. Then, the hydraulic stand 2 of the linear section is unloaded, and the middle part of the lining together with the traverse is pulled up by the same jacks 14, 18, and the linear section is bursted with the help of the hydraulic stand 2 in a new place. If necessary, the correction jacks 15, 20 (especially on loose soils) can additionally carry out a movement to revolt the middle part of the lining section.

At the third stage, the hydraulic stands 13, 22 are unloaded, and the lower part of the base section is pulled by the correction jacks 15, 20 to the 2/3 of the lining, which was expanded in a new place. Next, the hydraulic stands 13, 22 are again bursting, and the lining is ready for the next excavation cycle.

A similar process is repeated with all sections from the top to the bottom of the lava. When changing the length of the lava, a reverse process is possible - lowering the lining sections, starting from the lowest.

The proposed layout and kinematics of the lining, allowing the lining sections to be fed up the uprising in three stages, significantly increase the stability of the lining in a steep fall - the lining does not for a moment lose contact with the side rocks.

The technical and economic benefits of the implementation of this invention are obvious: due to the lack of workable supports, huge coal reserves in steep seams are preserved.

Information sources

1. Khorin V.N. Development of technology for underground mining of coal, potash and manganese ores. - M .: Nedra, 1985, p.148-167.

2. Orlov A.A. and others. Fastening and roof management in complex mechanized working faces. - M .: Nedra, 1993, p. 217-279.

3. Patent RU 2276729 C1, E21D 23/00, Bull. Number 14.

4. Patent RU 2324820 C1, E21D 23/00, Bull. Number 14.

Claims (2)

1. Mechanized support for steep formations of medium power, including a base stand, divided into basic sections, each of which consists of a front and block walls with hydraulic struts and correction jacks, and linear sections, each of which consists of a hydraulic stand with an upper and a base plate , capsules - of the hardware compartment, roller bearings and shoe, characterized in that the bases of the front and rear walls of the base section are divided into three telescopically connected parts with the possibility of their sliding by correction jacks, with this middle parts are connected by a traverse, in the grooves of which are placed the roller bearings of the linear section with the possibility of its movement after unloading. 2. Mechanized roof support according to claim 1, characterized in that the capsule is made with a thickening of the bottom in the form of a figured shoe bordering the crosshead with roller bearings.

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