Powered support for steep formations

FIELD: mining.

SUBSTANCE: powered support for steep formations of average thickness consists of similar linear sections each of which has roof timber, hydraulic prop of stay brace, shoe, hardware compartment capsule, cave-in and bottom-hole enclosure, as well movement and correction mechanism. Stabilisation and correction mechanism is located on both sides of the hardware compartment capsule and consists of supporting screens and air pads inflating against side surfaces of capsules of neighbouring compartments.

EFFECT: improving serviceability of powered support and its stability and movement method.

2 cl, 3 dwg

 

The invention relates to the coal industry and in particular to the field of mechanical fasteners treatment workings mining the coal from the average power of steep seams with physical destruction method of coal (laser, ultrasound, water jet cutting). Cool the layers are of high geological faulting excavation fields and big variability of hypsometry, with the load on the support is not great, because the 3/4 part of the lava samopoczucia rocks, return the fulfilled from the top previously worked horizons. The main burden falls on the dam, organ number of props during periods of precipitation the main roof. Within the same workspace lava load in 1.5-2 times lower[5-8].

Up to this time there is no effective techniques and safe technologies for development of steep seams. Therefore, in many coal-producing countries, such layers are not practiced, are preserved.

Known treatment complexes of the type CM, CM, KMT, PCO, KM 103, including shields, guides sectional beams connecting conveyor column with shields, BASE complex in the form of a conveyor rod and excavation of the body [1]These powerful, high-performance systems with sustainable mechanized roof supports are at angles of incidence of the formation of 10-15. Famous modern unified complexes of the new technology the economic level type KM, KM, KM, KM, KM designed for gentle coal seams with the angle of incidence of 35 [2].

All these complexes can not be used on sloping and steep seams with a bedding angle of more than 35 and deserted excavation of coal. On the steep drop support is prone to sliding and overturning in the direction of the fall. The search mechanism of the stabilizing supports are in different directions.

The complex Dolinsky MCD with mechanized support [3]. Complex for sloping and steep seams MCD, including becoming complex, Shearer, system management and support units, each of which contains overlapping with a visor that has the ability to turn in the direction of the face by 180, fence, stand and base associated with the composition of the propulsion Jack and the sectional rail, characterized in that the base of the shields are made in a single partition and provided with a vertical bracket and lugs located in the plane of symmetry of the base, a sectional guide consists of two pivotally connected beams with three mutually parallel hinges.

Disadvantages of supports complex MCD following. The stabilization system sections in a plane perpendicular to the plane of the rod, two guide beams with a vertical bracket on the Shoe, and with a stabilizing Jack on the roof bar eliminates or at ensait the pursuit of inclination of the sections on the bottom or from the bottom, but few prevents the pivot, tilt and slide in the direction of drop formation. Creep, deformation and tilting contributes to neprijatelj the base beams to the soil layer, especially when the water content of the soil (natural or irrigation), vibration excavation of the authority at weak side rocks (dome over verhnekame and the sinking of the Shoe in the soil layer).

Famous shield support for layers steep drop [4], adopted as a prototype.

It includes a basic becoming divided into basic sections, each of which consists of the front and the dam wall with anchor Jack and a shank connecting the front and the dam wall on the soil layer, and the linear sections, each of which consists of the hydraulic jacks with the roof bar and the support plate, which is mounted on roller bearings installed so that they can move inside the shank of the base section, wherein the linear sections contain capsule hardware compartment with ribs and covered with porous rubber or polymer, upon which the legs with the roof bar and the support plate, and roller supports attached to capsule, and the capsule is made with a thickening of the bottom in the Shoe. For ease of maintenance of the control equipment located in the capsule, along the front wall of the base section, the layout of the human is th Walker to the duct, creating a backwater of the clean air within hodka, and inside the capsule-hardware compartment.

The disadvantage of this mechanized lining is the placement of the roller bearings inside the liners, which can lead to their zastarovje and jamming especially at the seams with weak lateral rocks and soils prone to swelling. Jamming of the roller supports can significantly reduce the performance of the lining.

For the mining of the body with the physical destruction method of coal does not require any powerful base beams along the bottom or base of the sections.

Thirdly, the existing kinematic scheme of advancing this lining consists of a set of hydraulic elements, which have low rates of failure (MTBF), which lowers the efficiency of the lining as a whole.

The purpose of the invention is to further improve the health of the lining, improving its stability and method of shifting. For the implementation of tasks and taking into account the fact that near the bottom of the mountain slight pressure, for fastening workspace lava is enough to have two organ (landslide) the hydraulic jacks and the jacks of the linear section. For adjustment of the shields when the sliding side surface of the capsule linear sections have pneumatic cushion support boards. The excavation equipment body placed in the apparatus is atom compartment, and the compact Executive body can move in a predetermined path stope (within shield) robotic arm with a mechanical hand.

The goal of improving the health, sustainability and improve shifting lining is solved by improving the layout and the kinematic scheme of shifting. Other components of the lining is identical to analogue [4]Upravlyaushaya electronics shielded from the rock pressure of the power frame, and from the effects of vibro-impact - coverage capsules with a layer of porous rubber or polymer. Observation of the process of coal extraction and the operation of the devices is carried out remotely using videogamer.

The invention is illustrated by drawings.

Figure 1 presents a view of the side shield section and a vertical section, section, figure 2 is a view of the top shield section and a horizontal section section figure 3 - rear view.

We offer the support consists of homogeneous linear sections, each of which consists of a roof bar 1, the anchor Jack 2, is inserted in the Cup 3 and resting on the support plate 4, then the reference pressure rocks is transmitted to the main frame 5, which is located inside the capsule hardware compartment 6, and further to the Shoe support units 19. The correction device located on both side surfaces of the capsule 6, consist of support panels 8 and pneumatosis 17.

The rear of the capsule 6 is located anchor Jack 9 Jack belt 10 and supporting the Jack 11. To anchor Jack 9 is attached dammed the fence 18. Between the anchor Jack are the jacks correction 8.

Front capsules 6 on the Shoe 19 of the shields has a robotic arm, comprising a rotary platform 13 to the servo motor, the mechanical arm 14 that perform complex movements with the help of step-by-step motors, and capture 15 to change the Executive body. The signals of the sensors, controllers and videogamer processed by the Central computer, generate control commands, which are adjusted by the person and delivered to the control circuit. Control electronics must be protected from the effects of vibro-impact, for example, the surface of the capsule layer of porous rubber or polymer. In capsule linear sections of the air duct is supplied with clean air and creates a back pressure of air, prepyatstvuyushchii ingestion of dust.

For preventive maintenance and repair is Luke 7. For fences workspace lava from falling coal serves as a protective mesh 16.

Progress.

Excavation cycle begins with the destruction of the coal physical way: the robot gripper 15 takes the Executive body of the laser device and moving along a given trajectory, allowing the AET coal array into blocks. Then used the Executive body of the jet of high pressure water, which destroyed the coal massif. After downloading the coal haulage drift, the ultrasound device is trimmed to " prisha" coal on the roof of the reservoir and leveled soil. Change tools and modes, as well as trajectories of motion of the mechanical arm for square face is carried out automatically under control of the controller inside the capsule and the Central computer. Shipping coal on the face of the steep fall by gravity.

After removal of strips of coal, apparently, of a thickness of not more than 25-30 cm unloaded the upper linear section of the legs 2 is reduced and gidrotartrat shifting 10 submits a section on the bottom, with side air bags 17 with reference chicom 17 prevent tilting and overturning of the section on dip. After spreading out the linear section in a new place unloaded two hydraulic jacks organ number 9, which together with through the fence 12 is lifted by the Jack 10 to the linear section and again respirate.

Periodically to compensate for slipping located above the organ of the legs 9 are served up by the uprising of the reservoir to the desired value and held apart. Then for a moment unloaded the props thrust 2 linear section and located below the organ of the legs 9, and by means of jacks to the correction 8 and pneumatosis 17 with the reference shield 8, which respirate in neighbouring below respertory section, the upper linear section is served up by the uprising of the reservoir to the desired value. Shield section again held apart at full capacity. A similar process is repeated with all sections from the top to the bottom of the lava. By changing the length of the lava possible to reverse the process, lowering the shields, starting from the bottom.

Technical and economic benefits of implementing the present invention are obvious: due to the lack of a workable supports a huge coal reserves in steep seams are preserved.

Sources of information

1. Chorin Vnesenii equipment for underground coal mining, potash and manganese ores. - M.:Nedra, 1985, p.148-167).

2. Eagles AAI other Fastening and management of roof in mechanised faces. - M.:Nedra, 1993, s-279.

3. Patent RU 2276729 C1, E21D 23/00, bull. No. 14.

4. Patent RU 2372483 C1, E21D 23/00, bull. No. 31, 2009.

5. Improvement development of coal seams Prokopyevsk-kisilevsky field of Kuzbass comprehensive mechanization. The conference proceedings. Prokopyevsk, 1972

6. Kaidashev, HIV (VNIMI), Amidolysis (Giprouglemash). The results of the test unit AK. M., "Mining machines and automation, 3, 1972.

7. Kaidashev, VMIC, HIV. The study of interaction with wall rocks and manageability is gregate AK on steep seam. Leningrad, Works research Institute, SB, 1972.

8. HIV. Interaction of powered roof supports with safety in coal pile. Kemerovo, Proceedings of Graduation, SB, 1980.

1. Shield support for steep seams of medium thickness, consisting of a homogeneous linear sections, each of which has a roof bar, the legs of spreading, Shoe, capsule hardware compartment, the dam and the bottom of the fence, and a mechanism for advancing and correction, characterized in that the mechanism of stabilization and adjustment, located on both sides of the capsule hardware compartment, consists of a base boards and pneumatosis, razbirayuschihsya in the lateral surface of the capsule adjacent sections.

2. Powered roof support according to claim 1, characterized in that the role of the feed mechanism of the Executive body of the physical destruction of the coal area of the face does the robot manipulator is a robotic arm and gripper mounted on a rotating platform in front of the capsule hardware compartment.



 

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