RU2463450C1 - Mechanised longwall set of equipment by professor kariman for bulk mining - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: mechanised longwall set of equipment for mining comprises sections of a powered support, a hydraulic cutting cleanout machine with actuators and hydraulic cutting heads, joined via metal tubes with a water-supply manifold, a hydraulic booster, a plane with two drives and a plate conveyor with load-carrying plates on rollers, and also comprises a transshipment platform with a mechanised sliding bottom. At the same time the set of equipment additionally comprises a scraper conveyor and a hydraulic support "Sputnik" structurally connected to each other by advancing rams. At both sides of the plate conveyor there are channel guides installed to move coalcutters along them with cable handlers. Besides, the coalcutter installed at the face side of the plate conveyor has a vertical upward direction of a cutting jib in parallel to the face line, and the coalcutter installed at the goaf side of the plate conveyor has a direction of a cutting jib in the bed plane along its border with the roof. The hydraulic machine of the set of equipment is fixed in the end part of the longwall face at the side of the transport mine, and hydraulic abrasive jets work in the transverse plane perpendicular to the direction of cut coal body displacement.

EFFECT: higher efficiency of a mining face due to reduction of duration of a process mining cycle.

4 cl, 14 dwg

Description

The invention relates to mining in the field of underground mining, occurring in shallow beds, with a thickness of 1.2-3.5 m

Known treatment mechanized complexes for the development of flat formations using combines or plows. These are the treatment plants KM - 138, KM - 142, DSM - 143, KM - 144, KM - 146I, MK - 85, KMK - 500, KMK - 700, OKP - 41, etc. (1). The equipment includes hydraulic powered supports, scraper conveyors, combines or plows. For the operation of mechanized supports, the hydraulic energy of the emulsion is used, which is produced by pumping stations.

The closest is the "mechanized sewage treatment plant with large blocks of fossil mining and delivery by escalators" (see RF patent No. 2398107, C2, E21C, registered on August 27, 2010).

Mining is carried out by cutting it from the bottomhole array into large blocks using one hydraulic cutting machine equipped with executive tools for cutting three types of cracks:

- transverse across the entire thickness of the formation, directed perpendicular to the face line: transverse slots are cut along the entire length of the lava in the bottomhole array at the same distance from each other and equal to the length of the cut blocks of the fossil;

- a back vertical slit along the entire length of the lava and in height to the entire thickness of the formation, separating the bottomhole array taken out during this cycle from the rest of the array;

- the upper slit parallel to the plane of the reservoir, cut along the roof of the reservoir along the fossil massif along the entire length of the lava.

The transverse slots cut through when the hydraulic cutting machine is stopped, and the rear vertical slit and the upper along the boundary of the roof cut through when it moves. The cutting of the transverse cracks precedes in each section along the length of the lava the cutting of the back and upper cracks.

Slit cutting is preceded by the preliminary creation of a lower formation blast simultaneously along the entire length of the lava. The lower demolition is carried out by the work of the plow with simultaneous movement into the formed cavity of the delivery conveyor. Cutting blocks of the fossil is done after a complete latch into the chopped cavity of the delivery conveyor when the plow is stopped.

The blocks are loaded onto the conveyor by lowering them under the influence of their own weight on the load-bearing plates of the conveyor, which move the blocks to the transport output.

In the method adopted for the prototype, there are a number of irrational technological solutions, the revision of which reveals the possibility of a sharp increase in the productivity of the face. These include:

1. The inability to combine the cutting of fossil blocks with the work of the plow to form a lower demolition; this leads to an increase in the duration of the cycle by 30-40 minutes.

2. The inability to combine the cutting of the transverse cracks with the simultaneous cutting of the rear vertical gap and the upper gap along the roof of the reservoir; this leads to an increase in the duration of the cycle by another 30-40 minutes.

3. The cutting speed of the rear vertical gap and the upper gap can be no more than 1-2 m / min with abrasive hydraulic cutting; when using cutting machines with cutting bars with mechanized cable movement for these purposes, the slot cutting speed can be increased to 6 m / min.

4. Cutting the transverse slots before cutting the longitudinal (back and top) slots prevents the development of the front of work for cutting the longitudinal slots, and also prevents the combination of cutting the transverse cracks with the idle driving of the cutting machines, which leads to an increase in the cycle time by another 17-20 minutes.

5. There are difficulties in mechanizing the movement of emulsion hoses to a mobile hydraulic cutting machine.

The purpose of the invention is similar to the purpose of the prototype and is to create a technology that provides a significant increase in the productivity of the working face compared to the existing average productivity of combine and plow complex-mechanized working faces, ensuring a high level of safety of treatment operations, including the gas factor, eliminating dustiness of the lava atmosphere dust generated during mining, the elimination of heavy non-mechanized labor, ensuring high technical and economic their production indicators when working faces in difficult mining and geological conditions.

According to the submitted application, the new treatment plant performs the following processes:

- the creation of a lower submerged formation using the plow installation and the Sputnik hydroficated roof support;

- cutting through the cutting machines with slots in the bottomhole massif along the entire length of the lava with its lowering onto the plate conveyor below it;

- cutting through transverse cracks with ultra-high pressure water jets on the cut-out thickness of the bottomhole massif in the lower part of the lava with the plate conveyor left behind;

- moving a plate conveyor lying on its load-bearing plates cut the bottom hole array in the lower part of the lava and cutting through the transverse cracks;

- transshipment of cut blocks of fossil from a plate conveyor to a vehicle located on a transport mine;

- moving the mechanized lining and the delivery conveyor to a new position after unloading all the blocks from the delivery conveyor and the end of idle driving of logging machines with the general lava movement to the width of the plate conveyor.

This treatment complex, along with preserving the advantages of the prototype: safety by gas factor, environmental friendliness by dust, etc. has a very important advantage - particularly high productivity of the working face due to the fact that the duration of the production cycle is reduced to 60 minutes.

When switching to using a conveyor with a width of 2.4 m, the speed of movement of the face can increase up to 43 m / day. At such speeds of lava movement, the roof can be controlled by smooth deflection.

The invention is illustrated by means of drawings, each of which shows the following.

Figure 1. Arrangement of treatment equipment in a working face, view in profile; 1 - lower subversion; 2 - bottom slaughter; 3 - plow; 4 - scraper conveyor; 5 - support "Sputnik"; 6 - hydraulic gear; 7 - plate conveyor; 8 - cut out fossil block; 9 - a cutting machine; 10 - channel guides; 11 - cutting bar cutting the back slit; 12 - rotation feed shaft from the cutting part to the bar; 13 - back vertical slit; 14 - a cutting machine for cutting the upper slit; 15 - cutting bar cutting the upper gap; 16 - upper slit; 17 - channel guides of the cutting machine; 18 - cable laying machine; 19 - visor mechanized lining.

Figure 2. Cutting the transverse slots with a hydraulic cutting treatment machine; profile view; 1 - lower subversion; 7 - plate conveyor; 19 - visor mechanized lining; 20 - cut part of the transverse gap; 21 - cut from the bottomhole array of the thickness of the fossil, cut by transverse cracks into separate blocks; 22 - waterjet; 23 - hydroabrasive cutting head; 24 - metal tube for supplying ultra-high pressure water (SVD) to the cutting head; 25 - flexible tube for supplying abrasive to the cutting head; 26 - horizontal displacement of the Executive hydraulic cutting tool; 27 - vertical displacement executive hydraulic cutting tools; 28 - feed hopper for abrasive; 29 - adapter; 30 - a vertical metal tube for supplying water to the cutting head; 31 - horizontal platform for the placement of the water supply line SVD to the hydraulic cutting units; 32 - water supply line SVD.

Figure 3. Cutting of the transverse slots with the executive tool of the "GROM" hydraulic cutting machine, plan view; 23 - hydroabrasive cutting head; 24 - metal tube for supplying ultra-high pressure water to the cutting head; 25 - flexible tube supply of abrasive on the cutting head; 26 - horizontal guiding trolleys with an executive tool; 28 - feed hopper for abrasive; 29 - adapter; 31 - horizontal platform for placing the line for supplying SVD to the cutting units; 32 - water supply line SVD.

Figure 4. Power steering; front view; 33 - hydraulic booster; 34 - receiver; 35 - fine filter; 36 - electric pump for pumping water.

Figure 5. Plate conveyor; cross section; 37 - load-bearing plates; 38 - videos; 39 - pans; 40 - supporting channel; 41 - supporting transverse plate; 42 - roller bearings; 43 - eyes; 44 - blades; 45 - traction chains; 46 - axis; 47 - axis roller support; 48 - transverse plate with a holder of axes of a roller support.

Figure 6. Location of the plate conveyor electric drive; in profile and in plan; 37 - load-bearing plates; 49 - linear sections; 60 - transition sections; 51 - bypass dispensing drum; 52 - electric drive with gear.

Figure 7. A longitudinal section of the linear sections of the conveyor along the line of eyes; 37 - load-bearing plates; 38 - rollers; 41 - base plate; 42 - roller bearings of the axis; 49 - couplers, 50 - bottom of pans; 51 - plates of an empty branch; 52 - holders rolikoopor.

Figure 8. A longitudinal section of the linear sections of the conveyor along the line of the blades; 37 - load-bearing plates; 41 - supporting transverse plate; 42 - roller support blades; 45 - traction chains; 50 - bottom of the pan; 51 - plates of an empty branch; 52 - holders roller support, 53 - traction.

Figure 9. Traction chain conveyor, a linear section; 45 - traction chain; 53 - thrust.

Figure 10. Traction and traction chains in plan; 53 - thrust; 54 - traction blades; 55 - thrust support bends; 56 - guides of the pan.

Figure 11. Design of traction and pan; cross section; 41 - supporting transverse plate of the conveyor; 54 - traction blades; 57 - the upper half of the pan; 58 - the lower half of the pan.

Figure 12. Schematic design of a plate conveyor, front view; 37 - load-bearing plates; 42 - roller bearings; 59 - linear sections of the conveyor; 60 - transition sections; 61 - bypass drums; 62 - cargo branch; 63 - idle branch.

Figure 13. Reloading platform; front view; 37 - load-bearing plates; 41 - base plate; 42 - roller bearings; 45 - traction chains; 61 - a bypass drum; 65 - drive sprocket; 66 - overloaded fossil block; 67 - transport platform; 68 - hydraulic gear; 69 - stoppers; 70 - a body; 71 - metal guides; 72 - the bottom of the body with a mechanized extension.

Figure 14. Loading point of the treatment plant; plan view; 73 - drive head plate conveyor; 74 - reloading platform; 75 - transport platform; 76 - drive station plow installation; 77 - reloader.

The mechanized treatment complex according to the application includes:

- sections of hydraulic mechanized lining for a length of lava 200 m with pumping stations for emulsion supply and emulsion hoses;

- plow installation for carrying out the lower demolition of the developed layer as part of the plow, scraper conveyor and hydraulic gear;

- gidrofitsirovanny landing lining "Sputnik" for mounting the lower demolition;

- a cutting machine for cutting the rear vertical gap with a transport trolley and channel guides;

- a cutting machine with an external cutting bar for cutting the upper gap along the boundary with the formation roof with a transport trolley and channel guides with a cable layer and a track chain;

- a hydraulic cutting machine for cutting transverse slots with pumping stations to power the machine with an emulsion;

- a plate conveyor for dispensing from a face to a recoil drift of a fossil in large blocks;

- a reloading platform for reloading fossil blocks from a plate conveyor to transport platforms on a haulage drift.

Plow installation

The plow installation has (see Fig. 1) a plow 3, a traction chain, a special conveyor 4, upper and lower drive stations, a support bolt, hydraulic motors, electrical equipment with an irrigation system and drift equipment.

Hydroficated Sputnik lining

The Sputnik hydroficated roof support is designed for fastening the roof in the lower demolition and mechanizing the movement of a special conveyor working as part of a plow installation. The Sputnik lining consists of sections (see Figure 1), each of which includes a hydraulic screw landing strut 5, a valve body, a double-acting mobile jack: provides movement of the plow conveyor and the lining itself. Management of a rack and a hydraulic jack is made from the Era distributor with manual switching.

Cutting machine for cutting back vertical gap

The cutting machine for cutting the rear vertical slit is located in the lower demolition between the Sputnik support sections and the plate conveyor. The cutting machine is mounted on a trolley moving along the length of the lava along the channel guides. Together with a cutting machine on a trolley there is a bay of an electric cable supplying electric power to a cutting machine, which ensures the necessary speed of its movement. When moving, the cutting bar of the cutting machine, mounted vertically, cuts the rear vertical slot in the bottomhole array. The movement of the cutting machine at the beginning of the cycle occurs without stops from the transport output to the ventilation. The machine operator also sits on a trolley. The bayonet from cutting a slit along an inclined flap is dumped onto a plate conveyor belt. The reverse movement of the cutting machine after cutting the back slit in the full length of the lava is carried out immediately and also without stops.

Cutting machine for cutting the upper gap

The cutting machine for cutting the upper gap is also mounted on a wheeled trolley moving along the channel guides. The cutting bar of the cutting machine is mounted on a guitar (just like the screws of a combine). The movement of the cutting chain of the bar is provided by the rotation of the sprocket, which in turn receives rotation from the cutting part of the cutting machine along the vertical shaft (Figure 1). The movement of the cutting machine along the lava is carried out according to the same principle as the combine: the power cable is located in the cable layer, and the movement of the cutting machine is transmitted from the drive sprocket and the track chain.

The excavation cycle begins with the movement of both cutting machines from bottom to top along the length of the lava and back without stops.

Water cutting machine

The hydraulic cutting machine is designed for cutting transverse cracks in the face massif. The water-cutting machine consists of a working case (see Figure 4) and a separate executive tool (see Figure 3).

After the cutting machines exit the lower part of the lava and lower the cut-out part of the bottomhole array to the plate conveyor, free space is created between the bottom of the bottomhole space and the cut-out bottomhole massif. In this space, at its entire depth, equal to the width of the plate conveyor, the executive tool of the hydraulic cutting cleaning machine is slid. In the process of entering into the space by hydro-jet streams 22 (see Figure 2), the transverse slots are cut in the upper part, separated from the rest of the array of its bottom-hole part.

Hydroabrasive jets flow out of the waterjet cutting heads 23, to which ultra-high pressure water (SVD) 24 and abrasive sand 25 are supplied through separate tubes. The abrasive sand is sucked into the cutting head 23 from the abrasive feed hopper 28. Moving the Executive hydraulic cutting tool deep into the open bottom hole along horizontal guides 26. Water of ultrahigh pressure (up to 300 MPa) is supplied to the executive tool along line 32 (Figure 3).

At the same time, 6 transverse slots are cut (see FIG. 3), which ensures high performance of transverse hydraulic cutting and, accordingly, high performance of cutting coal blocks. From the working case (ultra-high pressure water source) to the executive tool, ultra-high pressure water (SVD) is supplied through a flexible sleeve up to 15 m long. This ultra-high pressure water stream (200-400 MPa) is used as a working fluid for cutting through the thickness of the fossil.

The hydraulic cutting machine has two options: in the form of a pumping station and in the form of a hydraulic booster. In the first embodiment, water acquires ultra-high pressure (usually no more than 200 MPa) immediately in the pump due to ultra-high compression. According to the second option, ultrahigh pressure is created in two stages: first, an emulsion pressure of up to 20-30 MPa is generated in the pumping station. Then this emulsion is fed into the hydraulic booster, where it is used to move the pistons. In the hydraulic booster, water is subjected to ultra-high compression (up to 300-400 MPa) due to the energy of the emulsion. The spent emulsion is returned to the pumping station, the ultra-high pressure water flow through a flexible hose is fed to the actuating tool.

When using the hydraulic booster, a significantly higher water pressure and therefore greater effect of hydraulic cutting of the fossil array are achieved. Therefore, this embodiment is considered the main one. However, in this case, it is necessary to provide for the operation of the hydraulic booster also the operation of one or more pumping stations to generate an emulsion flow.

The main structural elements of the hydraulic booster are hydraulic multipliers 33 (see Figure 4), in which the water is compressed to a level of 300-400 MPa and pulses are delivered to the receiver 34, where the pressure pulses are smoothed out and a high-power ultra-high pressure smooth water flow is generated into the mains . At the same time, several multipliers work, the number of which is proportional to the required performance of the hydraulic booster. In the most common hydraulic booster designs in Western Europe, a capacity of 20 l / min is ensured by the operation of 4 hydraulic multipliers for one receiver, where the pressure pulses are smoothed until the hydraulic booster receives a pressure that is uniform in value and the productivity of the ultra-high pressure water stream.

To ensure high productivity of transverse hydraulic cutting of the bottomhole array, 40 l / min is required (at the rate of 6.7 ml / min for cutting a single slot). Therefore, based on European experience, it is planned to use 8 hydraulic multipliers working on two receivers in the design of the hydraulic booster hydraulic booster.

The design of the hydraulic booster also provides a fine filter 35, a control panel and instruments: pressure gauges, flow meters, etc., as well as an electric pump 36 for pumping water into the system.

The actuator of the hydraulic cutting machine is stationary in the lower part of the lava and occupies a section along its length 10-15 m from the lava window from the side of the transport mine.

The actuator includes an ultra-high pressure water supply line 32 (see FIG. 2 and FIG. 3) located on a horizontal platform 31 and six cutting units of transverse abrasive hydraulic cutting together with consumables for abrasive 28 (see FIG. 3).

Each of the 6 hydraulic cutting units includes:

- abrasive hydraulic cutting head 23, creating a waterjet jet for cutting one transverse gap;

- a metal tube for supplying an ultrahigh pressure water 24 to the cutting head;

- the supply pipe to the cutting head of the abrasive 25 from the feed hopper 28;

- horizontal guiding trolleys with an executive tool 26;

- vertical guides of the executive tool 27.

Technical characteristics of the hydraulic cutting machine

Power steering 40/300

The generated pressure of the water flow, MPa - 300.

Productivity in water, l / min - 40.

Multiplier, units - 18.4.

Feed water pressure, MPa - 0.6.

The pressure of the feed emulsion, MPa - 16.

The required performance of the feed emulsion, l / min - 730

Dimensions: length - 1.3 m, width - 0.74 m, height - 0.5 m.

Cross cutting tool

The number of hydraulic cutting units - 6.

Slit cutting length, mm - 2400.

The depth of cutting the array in one pass, mm - 1200.

Slit cutting speed, mm / s - 30-50.

Number of waterjet cutting heads, pcs. - 6.

Water consumption in one head, l / min - 6.67.

Abrasive consumption in one head, kg / min - 1.5.

The diameter of the ultra-high pressure water supply tubes, mm outer - 10,

internal - 2.

Permissible size of solid particles, microns - 5.

The total consumption of abrasive, kg / min - 9.

The number of consumables for abrasive - 6.

The capacity of one feed hopper for abrasive, kg - 100.

Conveyor belt

The plate conveyor is designed to move to a stationary hydraulic cutting machine installed in the lower part of the lava, separated from the bottomhole massif of the body of the fossil for its transverse cutting and delivery of cut blocks of fossil from the lava.

FIG. 6 is a plan view of the plate conveyor used in the lava to produce fossil blocks, and FIG. 5 is a cross-sectional view thereof. The plate conveyor includes linear and transition sections, dispensing and tensioning heads. The dispensing head 73 (Fig. 14) has a bypass block 61 and drive sprockets 65 (Figs. 12, 13 and 14) with electric drives 52 (Figs. 6 and 14).

Fossil blocks are transported on load-bearing plates 37, which, when moving, are supported by their eyes 43 on an axis with rollers 38 rolling along the bottoms of pans located on the supporting transverse plate 41. Therefore, the weight of the heavy blocks is transmitted through the load-carrying plates, eyes, axles and rollers to the supporting transverse plate 41 and supporting channel 40.

All plates 37 are connected on both sides by couplers 49 (Fig. 7), which gives them stability in the transverse direction and protects them from turning. The plates are also lapped together.

Traction chains are driven by the rotation of the sprockets with which the bypass drums of the issued and tensioning conveyor heads are equipped.

The cut blocks of the fossil by the operation of the plate conveyor are given to the lava loading point, where they are loaded into the transport platforms with the help of a reloading platform.

The plate conveyor 7 (see Figure 1) at the end of the cycle moves into the space of the lower demolition simultaneously along the entire length of the lava using hydraulic jacks mechanized lining.

Plate conveyor includes:

- a closed circular chain of load-carrying plates 37 (Fig. 12) with rollers 38, eyes 43, blades 44, axles 46 (see Fig. 5, Fig. 6, Fig. 7 and Fig. 8);

- linear 59 and at the ends of the stand transitional sections 60 (see Fig. 12) of the conveyor, consisting of supporting channels 40, supporting transverse plates 41, roller bearings 42, axes roller bearings 47, transverse plates 48 (see Figure 5);

- three slatting racks 39 (see Figure 5), located parallel and flush to each other in such a way that their upper parts with rails are above the base plates, and the lower parts of the pan together with the rails are located respectively under the base plates;

- two (left and right) closed circular traction chains 45 (see Figure 5) together with rods 53 (see Fig. 8), traction vanes 54, support branches of rods 55 (see Figs. 9 and 10) located respectively, in the side left and right trolley racks with the rods 53 moving along the rails of the trolley rails in both the cargo and idle branches (see Fig. 8, Fig. 9, Fig. 10 and Fig. 11);

- a lead 65 (see Fig. 13) and a tension sprocket in the left and right traction chains with gears and electric wires 64 (see Fig. 12), the drive and tension sprockets are located in the transition sections of the conveyor; for the passage of the traction chains of the upper branches to the sprockets in the base plates in the transition sections there are windows (Fig.6 and Fig.13);

- two bypass drum 61 (see Fig.12 and Fig.13).

Plate Conveyor Specifications

Productivity, t / min - 140.

The maximum allowable amount of cargo on the stand, t - 2000.

The speed of the movement of the load-bearing plates, m / s - 0.25.

Sizes, m: length - 200; width - 2.5; height - 0.5.

Sizes of load-carrying plates, m: in width - 2.4; along the length of the stav - 0.43.

The diameter of the drums, m - 0.72.

The length of the linear section, m - 1.5.

Electric drive power, kW - 110.

The diameter of the rollers, cm - 10.

Total weight of moving parts:

on 1 lm, kg - 356,

total, t - 142.4.

The use of plate conveyors for delivering mined minerals along the lava to the mine workings allows to increase the productivity of the delivery means in the lava many times by eliminating the sliding friction of the mineral on the bottom of the pan. The use of rollers with a diameter of 10 cm makes it possible to reduce the coefficient of resistance to displacement from 0.4-0.8 (during sliding friction of loose material on a metal pan) to 0.01 (when rolling friction of a metal roller with a radius of 5 cm on the pan bottom metal). That is, the force of resistance to the movement of cargo decreases on average 60 times! Thus, the replacement of scraper conveyors with plate conveyors during fossil delivery along the lava is an extremely progressive matter!

The proposed design of the plate conveyor is designed to move heavy large-sized fossil blocks weighing up to 12 tons along the lava. Heavy 12-ton fossil blocks during transportation are located on 2.4 m wide load-bearing plates moving on rollers that roll along the bottoms of 3 parallel laid on base plates of pan stands of scraper conveyors. The weight of the blocks of the fossil is transmitted through the rollers and bottoms of the pans to the base plates with channel supports on the sides.

Therefore, the supporting structures of the linear and transition sections are composed of powerful supporting channels 40 and transverse plates 41, which absorb the main load from the moving blocks of the fossil (see Fig. 5).

When fossil blocks are delivered along the lava on the conveyor, the blocks lie motionless on load-bearing plates 37, which transmit all the gravity from above through their eyes on axis 46, on which seven rollers 38 are mounted, moving along the bottoms of the pans. Thus, the weight of the blocks of the fossil is transferred from the plates through the axes to the rollers, and the latter transfer this weight through the bottoms of the pans 39 to the supporting transverse plates 41.

The movement of load-carrying plates with a load of fossil blocks is provided by the movement of the blades of these plates under the influence of the traction blades with which the traction chains are equipped.

The upper half of the pans is mounted on top of the surface of the base plates, and the lower half of the pans is mounted below under the base plates. Due to this, the traction vanes of the traction chains located on top of the plate provide movement of the load-bearing plates in the load branch, and the traction vanes moving under the plate provide movement of the plates in the idle branch.

The movement of the load-bearing plates 37 is acquired as a result of the interaction of the traction vanes 54 (see FIG. 10) with the vanes 44 of the load-carrying plates 37, as shown in FIG. The blades 54 of the rods under the tension of the traction chains force the blades of the plates and themselves to move. The rectilinear movement of the rods 53 is ensured by the fact that the ends of the rods move along the guides of the pans 57 and 58 (see Fig. 11). The stability of the rods from the tipping is provided by the presence of support branches 55 (see Fig. 10).

The movement of the traction vanes located on the axes, the ends of which move along the guides of the pans, is provided by centrally located traction chains driven by drive sprockets.

Traction chains are located only in side racks. The traction chains are driven by the rotation of the sprockets of the drive head 65 (see Fig. 13), which is located in the head transition section and together with its electric drive is located in the space of the transport output (Fig. 14).

Transshipment platform

The reloading platform is designed for transshipment of fossil blocks discharged from the face to a vehicle for transporting the mined blocks along the mine.

The reloading platform is located on the transport mine opposite the lava window.

The reloading platform consists of a body 70 (see Fig. 13) and a retractable bottom 72. The body has the ability to move (when moving the delivery conveyor due to the start of a new cycle) on the rollers along the metal rails 71 after the conveyor moves, providing the body to be installed opposite the bypass drum plate conveyor.

Mechanized extension of the bottom of the reloading platform in the direction opposite to the movement of goods along the transport output, provides a quick reloading of the block on the vehicle transport output.

Fossil blocks are loaded into the body of the transfer platform using load-bearing plates pushing the block into the body. After that, the body is unloaded from the unit by mechanized extension of its bottom.

Then, the transport platform is moved along the excavation by 2.5 m with the help of a hydraulic motor 68 in order to free up space on the platform for the next block. When moving the platform, the fossil block is advanced to the platform using the ski installed next to the platform and the conveyor bypass block.

Mechanized support

To fasten the roof in the working face as part of the treatment mechanized complex, serial powered supports are used, which have a sufficient width of drainless space from the face to be placed right next to the main face of the cutting machine and the executive tool of the hydraulic cutting machine.

Performance mechanized treatment complex

Due to the fact that the dimensions of the extracted blocks of the fossil amount to 2.4 m in the direction of lava movement, each lava cycle moves by 2.4 m, which is four times more than the usual 0.6 m - the width of the combine harvester. Therefore, the production volume per cycle is 4 times greater than with combine lavas. So, in a 200 m long lava during the development of a 3 m layer, production per cycle of movement is

3 m × 1.4 t / m ³ × 2.4 m × 200 m = 2016 t.

The performance of the treatment plant also depends on the number of cycles per day. Production time per day is 18 hours (three shifts of six hours). Therefore, the number of possible cycles per day is determined by the duration of one cycle. The duration of the cycle is determined by the longest of the two durations: the time of movement of the plow face at a distance of 2.4 m and the time of cutting blocks of fossil along the entire length of the lava and their delivery from the face.

Focusing on the use of Russian-made plow installations of the СО or СН types, the possible chip thickness and speed of the plow movement are taken according to their technical characteristics: chip thickness 7 cm, and the speed of 1.89 m / s.

Then the number of chips necessary for moving the face to 2.4 m is

2.4 m: 0.07 m = 34.

Duration of removal of one chip

200 m: 1.89 m / s = 106 s = 1.76 min.

Then the duration of the removal of 34 shavings and the movement of the plow face 2.4 m is

1.76 min × 34 = 59.8 min.

According to the technical specification, the working feed rate of the Ural 33 cutting machine is 2.82 m / min. However, taking into account that the cutting of the cutting machines is carried out on wheeled trolleys along the channel guides, and the cutting of the cracks with the cutting machines is carried out in a well-pressed array, the real working feed speed will be at least 1.5 times higher and amount to 4.2 m / min. With this in mind, the time of cutting through the cracks will be:

200 m: 4.2 m / min = 47.6 min.

The cutting speed of the transverse slit in the fossil array located on the conveyor stand opposite the transverse hydraulic cutting executive tool is estimated at 5 cm / sec. At the same time, cutting is carried out by a hydroabrasive jet with a water consumption of SVD 6.7 l / min and a pressure of 300 MPa. In this case, based on experimental data, the depth of cut of the array will be up to 1.2 m in one pass. Therefore, for complete cutting through the gap, two passes are necessary: direct and reverse. Their execution time is equal (at a cutting speed of 5 cm / sec)

2 × 240 cm: 5 cm / s = 96 s = 1.5 min.

In order to increase the productivity of transverse hydraulic cutting, 6 transverse slots are simultaneously cut through the action of 6 hydraulic cutting units.

After the cutting of the transverse slots is completed and the hydraulic cutting heads are pulled out, the delivery conveyor is switched on and the cut blocks of the fossil are reloaded onto transport platforms, and the next section of the fossil body takes the place on the conveyor opposite the transverse cutting tool to cut off the following blocks from it.

The duration of unloading of each block is determined by the loading time of the block in the body of the loading platform equal to

1.6 m: 0.25 m / s = 6.4 s,

where 1.6 m is the width of the block, m;

0.25 m / s - the speed of movement of load-bearing plates;

and platform unloading time equal to

2.4 m: 0.5 m / s = 4.8 s,

where 2.4 m is the length of the block;

0.5 m / s - the movement speed of the transport platform during the release of the body.

So, the unloading time of one block is 6.4 + 4.8 = 11.2 seconds.

Then the unloading time of 6 blocks is 11.2 × 6 = 67.2 sec = 1.12 min.

Then the total cutting time of 6 blocks and their unloading

1.5 min + 1.12 min = 2.62 min.

Then the total time of cross cutting and unloading of blocks from the conveyor is

The remaining 60 minutes - 53.7 minutes = 6.9 minutes are spent on moving the powered roof support, conveyor and reloading platform to the position before the start of a new cycle.

Thus, the total duration of the production cycle is 1 hour. Therefore, during working hours per day, 18 cycles are performed - one per hour.

The total capacity of the treatment plant is:

2016 t × 18 = 36308 t / day.

This value on average exceeds the existing productivity by 4 times.

References

1. Progressive technological schemes for the development of seams in coal mines. IGD them. A.A. Skochinsky. M. 1977

Claims (4)

1. A mechanized wastewater treatment complex for the extraction of fossil deposits in shallow beds, and its development in large blocks, containing mechanized roof support sections, a hydraulic cutting washer with actuators and hydraulic cutting heads connected through metal pipes to which they are rigidly fixed, with a water supply line, and a hydraulic booster , a plow with two drives and a plate conveyor with load-bearing plates on rollers, characterized by the presence of a scraper conveyor and hydraulic support "Sputnik" structurally interconnected by hydraulic ram jacks, channel guides located on both sides of the plate conveyor, the presence of cutting machines moving on trolleys along the channel guides, the presence of cable layers, while the cutting machine installed on the bottom face of the plate conveyor has the cutting bar direction upward and parallel to the bottom line, and the cutting machine mounted on the obstructed side of the plate conveyor has the direction of the cutting bar in the plane ty seam at its border with the roof. 2. The complex according to claim 1, characterized in that the cable laying machine, located on the bottom side of the plate conveyor, is located on the bottom side of the cutting machine, and the cable laying machine, located on the cutting side of the plate conveyor, is also located on the blockage side of the cutting machine . 3. The complex according to claim 1, characterized in that the hydraulic cutting machine is stationary in the end part of the lava from the side of the transport excavation, and the action of the waterjet jets occurs in a transverse plane perpendicular to the direction of movement of the cut coal body. 4. The complex according to claim 1, characterized in that it contains a reloading platform having a mechanically retractable bottom.

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