Recirculation ventilation installation
SUBSTANCE: proposed installation comprises blower with nozzle arranged in underground recirculation channel, bulkhead and shell with self-sealing valve. Aforesaid shell is arranged in crosswise wedge-like bulkhead along underground recirculation channel that communicates air feed and vent channels. Gaps between shell and aforesaid bulkhead are sealed. Aforesaid blower is arranged on one side of the shell, while on other side a self-sealing valve is fitted. In partial air reuse, said valve is open, while in changing into airing conditions with recirculation, said valves shuts off the shell. Support bulkhead is mounted at intersection of air recirculation and ventilation channels. Ventilation or recirculation channel accommodates sensors that serve to control quantitative and qualitative parametres of recirculated air and installation overall control unit.
EFFECT: higher safety, reliability and efficiency.
7 cl, 2 dwg
The invention relates to the mining industry and can be used in the ventilation systems in mines underground structures (tunnels, subways, mines, etc.) in the schemes of ventilation with partial reuse of the air.
Famous fan, which consists of primary and secondary fans, equipped with nozzles, and the nozzles are installed coaxially with the shell. Between the walls of the excavation and the sides with a jumper (the Russian Federation No. 2138648; MCI E21F /08; publ. 27.09.1999,, bull. No. 27).
A disadvantage of the known fan installation is a possibility of leakage of air through the cowling when the fan stops.
The closest in technical essence and the achieved result of the present invention is a fan recirculation system, consisting of fan, located in the mine workings and oriented in the direction vozduhopodajushchej production, ejecting channel in the form of a shell located between the two bridges, the gap between the cowling and the jumper sealed, sealing gaps between the shell and the jumper can be made of elastic material, one side of the shell has a working fan and the other end of the shell covered OTS is flowing valve, which can work in both automatic and mechanical modes, work fan and cowling installed on the frames and lintels in connection with the sides have metal tubes (U.S. Pat. Of the Russian Federation No. 2350753; IPC E21F 1/08; bull. No. 9, publ. 27.03.2009).
The disadvantages of the known fan recirculation system are:
the inability to shut off the valve in an automatic and often in the mechanical modes in case of accidents (e.g. fire or explosion), when there is a power outage in the mine and to the location of the fan recirculation setting no access and approaches to control room or to the flap gassy. When this occurs uncontrolled air leakage, which can exacerbate the consequences of the accident;
- impossibility when working recirculation fan installation to maintain the frame shell and the junction of the confuser and of the cone and the cylindrical part of the shell, as the valve opens (at work) in the direction of the passage and completely overlaps it;
- excessive investment - two tight jumpers;
- the complexity of installation of jumpers that need to be erected around the lateral perimeter framing on both sides of the shell and having high strength and reliable sealing;
- working fan mustache is anouki works protionamide with other sources of thrust, located in the ventilation network, as a result of its technical and economic performance is low;
- no ejection effect in the ring when the above is equivalent to the ventilation network, which operates the fan recirculation setting, less than 2 m2. In the shell arise jet air flow and overall performance of the fan recirculation setting is smaller than the supply of operating the fan.
The technical result of the invention is to improve the safety, reliability and efficiency ventilation of underground structures.
This technical result is achieved by the fact that the fan recirculation apparatus consists of a source of traction, shell, jumpers, with sealing gaps between them, with one side of the shell is the source of power, but on the other hand set valve all equipment is located in the recirculation channel in the direction from the ventilation duct to the intake channel and mounted on poles, sides made of one or several parts, and jumper, which has a shell made wedge-shaped and overlaps the cross-section of the recirculation channel, and valve made of self-compacting, when this fan recircu alonna installation is further provided with a retaining jumper, which is installed in the pair recirculation and ventilation ducts throughout its height.
Fan recirculation installation mounted either at the stake, or on the Islands of self-propelled equipment or on the tables. The source of thrust has one or more fans mounted cascade and configured in series and / or parallel operation. Shell consisting of several parts, includes: a mixing chamber and inlet nozzles, or the mixing chamber and outlet nozzles, or the mixing chamber with inlet and outlet nozzle, and the output of the nozzles is made in the form of a cone, and the length of the self-sealing valve exceeds the diameter or height of the cross section of the shell or cone, and the diameter of the outlet nozzle is equal to or less than the diameter of the mixing chamber and the diameter of the inlet nozzle, and into the ventilation or recirculation channel sensors are quantitative and qualitative control of the recirculation air and the control equipment the source of draught fan recirculation installation.
The invention is illustrated by drawings, where figure 1 shows the design of the fan recirculation setting for any ventilation network, and figure 2 - design fan recirculation setting, to work in ventilati is the R networks with equivalent aperture equal to or more than 2 m2which is additionally used for ejection effect and thereby more effectively using the energy source of thrust.
The drawings indicated:
1 - source of thrust; 2 - shell; 2A - mixing chamber; 2B - input nozzles; 2B - output nozzles; 3 is a transverse wedge-shaped jumper; 4 - self-sealing valve; 5 - intake channel; 6 - fresh Vozduh; 7 - recirculation channel; 8 - recirculation air; 9 - a mixture of fresh and recirculated air; 10 - vent; 11 - the mixture of exhaust and recirculation air; 12 - exhaust air; 13 - retaining retainer; 14 - sensors and apparatus for automated monitoring and control; 15 - support for equipment; 16 - nozzle.
Fan recirculation apparatus consists of a source of thrust 1, which can be either one fan (1, 2)or as multiple fans installed cascade and configured in parallel and / or sequential operation of the shell 2, is installed in a transverse wedge-shaped crosspiece 3, overlying the cross-section of the recirculation channel 7. The gaps between the shell 2 and the transverse wedge-shaped jumper 3 sealed with sealing material such as a sealant or foam. The jumper is made wedge-shaped, as when the ejector will is replaced with the confuser, he additionally held apart, and, thus, improves sealing.
On one side of the shell 3 is the source of thrust 1, and on the other hand has a self-sealing valve 4, which may be either in the form of shell 2, or in the form of a cone (dotted line in the drawing), and its length exceeds the diameter or height of the cross section of the shell or diffuser. Self-sealing valve is made of airtight and relatively light material, for example of the material of the ventilation sleeves or parachute cloth, or thick nylon, etc. In the event of a power fan such fabric falls down and blocks the cross section of the shell or diffuser.
The pairing of the recirculation channel 7 and the ventilation duct 10 is located a retaining retainer 13, which is mounted on the entire height of the channel and is made of airtight material, such as wooden crate, embroidered ventilating hose or conveyor belt, or metal, or concrete, etc.
The parameters of the location of the jumpers a, b, c, indicated on the drawings, are "know-how" of the present invention and are determined from the ratio that takes into account the performance of the source of thrust, sizes, framing, composition and flow rate and mine depression.
All equipment fan recirculation in the system can be mounted stationary on the supports 15, for example on concrete tables, coasters, frames, and can be installed with the possibility of rapid movement (if necessary) in another part of the ventilation network, for example in the Islands self-propelled equipment (for example, on the frames of trucks).
If necessary prompt transfer recirculation fan installed on a new (another) part of the ventilation network jumpers 3 and 8 in the old section shall be redeemed, and a new site built. Also is the remounting of the control equipment 14 due to the movement of the shell 2 and source pull 1 on the carcasses of the self-propelled equipment 15 in the new section of the ventilation network, thus achieving efficiency and less downtime.
Sensors and equipment of the automatic control 14 are arranged either in the duct or in the recirculation channel in a convenient place.
Fan recirculation system works as follows:
When working recirculation fan installation in ventilation mode with partial reuse of air (figure 1) channel thrust 1 takes part recirculating air 8, clip retaining strap 13 of the ventilation duct 10, which moves the mixture of exhaust and recirculation air 11, and pumps egov shell 2 through the nozzle 16. Further, through the self-sealing valve 4, which opens under the action of the velocity head of the recirculation air 8, the mixture of air flows through the recirculation channel 7 to the air supply channel 5 and then the air supply channel 5, which is a mixture of recirculated air 8 with fresh air 6 with the formation of a mixture of fresh and recirculated air 9, which is sent to the places of its consumption.
Sensors and equipment of the automatic control 14 control qualitative and quantitative composition of the recirculating air 8, namely the presence and concentration of any flammable, toxic, inert and other gases. In case of exceeding the measured values in the recirculating air over 8 valid values control equipment the source of thrust 1 fan recirculation setting disables the power supply and the source of thrust 1 stops. The pressure of the recirculation air 8 is weakened and the self-sealing valve 4 under its own weight overlaps the hole of the shell 2, thereby stopping the recirculation air 8. Afflux of fresh air 6 of the air supply channel 5 creates an additional seal self-sealing channel 4.
When working recirculation fan installation in ventilation networks with given equivale Tim hole, equal to or more than 2 m2you can also use the ejection effect.
The output from the source pull 1 set the nozzle 16 and the shell 2 may consist of several parts: either the mixing chamber 2A is input nozzles 2B, or the mixing chamber 2A - output nozzles 2B, or the mixing chamber 2A and the input nozzles 2B, and the output of the nozzles 2B (figure 2). The cross-sectional shape of the mixing chamber 2A may be performed either cylindrical or rectangular, or square, or elliptical. A similar cross-sectional shape can be the input 2 and output 2V nasdaw. It should be noted that the cross-sectional shape of the input 26 and the output 2V nasdaw determines the shape of the mixing chamber 2A.
The diameter of the outlet nozzle 16 must be less than the diameter of the mixing chamber 2A and the diameter of the inlet nozzle 2B. Through the annular section between the nozzle 16 and the shell 2 is sucking extra volume of recirculated air 8 from the ventilation duct 10.
Retaining crosspiece 13 separates the mixture of exhaust and recirculation air in the duct 10 into two streams: the exhaust air 12, which then moves along the ventilation channel 10, and the recirculating air 8, which is a source of thrust 1 and retaining jumper 13 is sent to recirculatio the s channel 7. Due to the kinetic energy of the mixture of exhaust and recirculation air 11 and retaining jumper 13 decreases protivopar that is generated by other sources of draught ventilation network and the current source pull 1 fan recirculation installation.
The use of the proposed solution allows to increase the safety, reliability and efficiency of ventilation of underground structures by increasing the supply part of the exhaust air to fresh air and next to the place of its consumption; the use of self-sealing valve precluding leakage of air when you stop source of traction, including in case of accidents; to create a velocity backwater due to the energy of the mixture of exhaust and recirculation air and thereby reduce protivopar other sources of thrust, which accounts for the source of draught fan recirculation setting; reduce air leaks by using a transverse wedge-shaped jumper; use ejection effect in ventilation networks with the equivalent aperture equal to or more than 2 m; the possibility of maintenance, including when the recirculation fan installation; reduce the consumption of materials and ease of installation of the fan recirculation setting and in underground confined conditions; automated control of qualitative and quantitative indicators of the recirculation air and control the operation of the source of draught fan recirculation installation.
1. Fan recirculation apparatus consists of a source of traction, shell, jumpers, with sealing gaps between them, with one side of the shell is the source of power, but on the other hand set valve all equipment is located in the recirculation channel in the direction from the ventilation duct to the intake channel and mounted on the supports, wherein the shell is made of one or several parts, and jumper, which has a shell made wedge-shaped and overlaps the cross-section of the recirculation channel, and valve made of self-compacting, with recirculation fan installation is further provided with a retaining strap, which is installed in the pair recirculation and ventilation ducts throughout its height.
2. Fan recirculation apparatus according to claim 1, characterized in that it is mounted either at the stake, or on the Islands of self-propelled equipment or tables.
3. Fan recirculation apparatus according to claim 1, characterized in that the source of thrust has one or more fans installed to skade and configured in series and / or parallel operation.
4. Fan recirculation apparatus according to claim 1, characterized in that the shell consisting of several parts, includes: a mixing chamber and inlet nozzles, or the mixing chamber and outlet nozzles, or the mixing chamber with inlet and outlet nozzle, and the output of the nozzles is made in the form of a cone.
5. Fan recirculation installation according to claim 4, characterized in that the length of the self-sealing valve exceeds the diameter or height of the cross section of the shell or diffuser.
6. Fan recirculation installation according to claim 4, characterized in that the diameter of the outlet nozzle is equal to or less than the diameter of the mixing chamber and the diameter of the inlet nozzle.
7. Fan recirculation apparatus according to claim 1, characterized in that the ventilation or recirculation channel sensors are quantitative and qualitative control of the recirculation air and the control equipment the source of draught fan recirculation installation.
FIELD: process engineering.
SUBSTANCE: proposed method comprises controlled air inflow. Note here that said controlled air inflow occurs between first and second stages of the fan.
EFFECT: lower power consumption.
FIELD: machine building.
SUBSTANCE: device is equipped with autonomous sub-system of control over separate ventilating installation. The sub-system consists of a mode setting block, of an electric engine smooth start-up block, of a control block, outputs of which are connected to inputs of actuators of working wheel blades turn and turn of the gate of the ventilator, of sensors of working wheel blades position and gate position and of a metre of current voltage or electric engine exciting current. The device is additionally equipped with autonomous sub-systems of control over separate ventilator installations. Each sub-system contains an actuator for control over brake, the input of which is coupled with the output of the control block, pressure and brake gauges and a micro-processor controller including a "driving-driven" mode switch block, an input-output module and a micro-processor module. The outputs of the sensors of working wheel blades position, gate position, feed voltage or electric engine exciting current, gauges of pressure and brake are connected with corresponding inputs of the input-output module. The block for electric engine smooth start-up of each autonomous sub-system is made in form of a combined block of a smooth start-up-adjustment of excitation (SSB/EAB). The latter is used as a block of smooth start-up with phase control at application of an a-synchronous electric engine and as a block for adjustment of excitation current at application of synchronous electric engine of the ventilator. The microprocessor controller is coupled with the electric engine of the ventilator via the module of input-output and SSB/EAB.
EFFECT: increased reliability of control over installations containing several ventilator aggregates with a-synchronous or synchronous electric engines.
2 cl, 1 dwg
SUBSTANCE: method includes air supply from main mines along panel transport mines to block transport mines to areas of mining works and removal of spent air from bottom hole through split chambers in block ventilation mines to panel ventilation mines further to main ventilation mines, at the same time part of spent air from panel ventilation mines through blocks, where treatment works are not carried out, recirculates to block ventilation and split mines, and also through block transport mines, to panel transport mines with the help of additional recirculating ventilation plants located on panel and block mines, where mining works are not carried out.
EFFECT: lower risk of contaminated air accumulation in mined-out space, provision of stable microclimate in areas of mining works and reduced costs for ventilation.
SUBSTANCE: long blind drift ventilation method involves drilling of the main and additional wells in a pillar between adjacent and blind drifts; development of the cavity connecting the main and additional wells; air supply via the main well from fan or other draft source from adjacent drift to blind one; air ejection via additional wells from adjacent drift to blind drift. For more qualitative mixture of active (inducing) and passive (induced) jets the created cavity has bigger length and is made in the form of cone - diffuser.
EFFECT: increasing the jet head, flow continuity and its hydrodynamic stability, increasing system ejection coefficient.
SUBSTANCE: method for ventilation of development entries by way of slanting horizontal wells bored from the surface involves delivery of fresh air into the well due to general shaft depression and discharge of the outgoing air stream along main entries and the well. The shaft of the slanting horizontal well bored from the surface is positioned within a protective pillar between coupled development entries being arranged; discharge of the outgoing air stream from the development faces is performed through the breakthrough closest to the faces that intercepts the well shaft and with the help of a vacuum pump installed on the surface at the well mouth.
EFFECT: provision for independent ventilation of coupled development entries and extraction faces and reduced scope of full-faced entries being arranged.
SUBSTANCE: fresh air is supplied into mining face due to general shaft depression along two courses that delineate extraction pillar. It is discharged along course maintained behind mining face. In zones of active gas release of approximate beds, air impermeable throughput brattices are erected to form gas draining chamber. Part of stripped area adjacent to the latter is zone of methane trapping. Flow of air-methane mixture is formed. One part of flow is drained along gas-draining course into outward line of extraction site. The other one is discharged from stripped area outside the limits of extraction site. Between mining face and zone of maximum gas release of developed bed an additional throughput brattice is installed. The other part of air-methane mix flow is pushed aside in the area of impact of throughput brattices of gas draining chamber in direction of developed bed unloading zone arrangement. Flow of air-methane mix pushed aside is captured in wells for degassing. They are drilled in advance to form gas-draining chamber from maintained course into zone of developed bed unloading. Mouths are arranged behind project area, where gas draining chamber throughput brattice is erected. Bottoms are arranged in zone of maximum gas release of developed bed. Additional throughput brattice is initially installed in course maintained behind mining face in area, where its vertical plane matches vertical plane passing through point, which is projection of bottom in the well nearest to mining face for degassing onto ground of stripped area, and line being perpendicular drawn from specified point to the limit between maintained course and stripped area. As mining face advances, it is displaced in direction of extraction pillar development.
EFFECT: increased efficiency of methane removal, provides for the possibility to create reserve for increased load at bottom.
4 cl, 7 dwg
SUBSTANCE: system includes pit shaft with air-sound channels, ventilation and noise silencer chambers and ventilation stall. Stall is attached to pit shaft by means of the pipeline piece built in the building located above the underground structure. Between ventilation and noise silencer chambers there installed is elastic diaphragm with an opening.
EFFECT: reducing noise level by means of multi-staged silencing.
SUBSTANCE: invention relates to mining, in particular - to a method for removal of dust and gas from the breakage heading in case of room-and-pillar development system. It involves supply of fresh air to the bottomhole zone with a draught source generating a vortical circulation circuit. On the one side of the circuit one performs supply of fresh air while on the other side one performs removal of contaminated air from the bottomhole zone. The draught source is placed in the bottomhole zone. It creates the first circuit of circulation vortical motion and generates a directed air flow, contaminated with dust and gas, along the wall of the excavation opposed to the miners' workplaces. At the spot of the first vortical circulation circuit connection to the following vortical circuit a linkage is driven that connects the excavation wherein cleaning works are performed to the exhausted chamber. An additional draught source installed in the exhausted chamber may be equipped with an air duct.
EFFECT: method enables intensification of ventilation in an excavation wherein cleaning works are performed and miners are present and at the place of connection of vortical circulation circuits where occurs accumulation of dust and gas clouds which improves sanitary and hygienic conditions of mining workers labour.
2 cl, 1 dwg
FIELD: technological processes.
SUBSTANCE: invention may be used in mining industry. Separator intended for separation of coal bed gases is placed in cavity of mine. Hydrocarbons separated in separator are exhausted via gas line, and volume of gases discharged from mine is substituted with atmospheric air. Separator comprises body with nozzle of gas inlet 14, nozzle of light gas discharge 12 and nozzle of heavy has discharge 1, engine 20. In toroidal cavity 5 of separator body there is radial-axial centrifugal compressor installed with hollow blades, in which frontal slots 1 and rear slots 2 are provided. Propeller 10 is fixed on tubular extension of shaft 11. To inner surface of propeller 10 there are blades of radial-axial centripetal compressor 9 fixed.
EFFECT: efficient separation of heavy and light gases, reduction of power inputs for air conditioning in mine.
3 cl, 6 dwg, 2 tbl
SUBSTANCE: previously frame is prepared for heating with the help of flexible heating element, which is arranged along perimetre of outer or inner surface of frame with fixation on it. Afterwards heating element via terminal box arranged inside connecting box is connected to sensor for control of air temperature supplied to area of frame location. Sensor is connected to source of power supply. Area of sensor location together with connecting box is a section of frame, towards which largest part of cold atmospheric air flow is directed in process of reverse. Under conditions of negative temperatures, prior to reversing of ventilation jet at specified time by actuation of air temperature control sensor, heating element is connected to source of power supply, providing for preheating of supply channel folding door frame. As ventilation jet is reversed with supply of cold atmospheric air, channel folding door is transferred to position of reverse mode with the possibility of adjacency to heated frame. At the same time frame heating is continued, and heat is transferred from frame to folding door, preventing its icing. As time of ventilation jet reversing elapses, frame heating is stopped by de-energising of heating element. Then since channel folding door will not freeze to frame, it is freely changed into initial position. Prevents icing of folding door in supply channel during ventilation jet reversing under conditions of negative temperatures.
EFFECT: heating of supply channel folding door as it adjoins heated frame in reverse mode position.
6 cl, 4 dwg
FIELD: mining industry.
SUBSTANCE: pipeline has sections made in form of hermetically interconnected outer and inner covers, mounted with space relatively to each other, and main ventilator. On different ends of pipeline flow meter and additional ventilator are mounted, the latter having adjustable characteristics and being connected to inter-pipe space by branch pipe. In inner cover apertures are made placed along radius and along length of cover. Air comes from apertures to air channel and forms additional air flow near walls of inner cover, which lowers or heightens aerodynamic resistance of ventilation pipeline.
EFFECT: higher efficiency, higher safety, lesser costs.
FIELD: mining industry.
SUBSTANCE: method includes use of screw-drilling machine for driving of several first ventilation shafts in ore body and driving several second shafts, while second and each second shaft crosses, at least, one matching first shaft, forming first support walls, supporting ceiling. First supporting ceilings consist of ore body zones between neighboring second shafts, each first support wall has portion of at least one first shaft, passing horizontally through it. Horizontal channels are formed, each of which is placed transversely to matching second shaft between appropriate portions of first shaft, formed in adjacent support walls, for forming of group of continuous ventilation shafts. Second shafts are filled for forming second supporting walls, supporting well ceiling, and first supporting walls are extracted. First ventilation shafts can be made parallel to each other. Second shafts may be directed perpendicularly relatively to first ventilation shafts. In ore body air-outlet and air-inlet ventilation mines can be formed, placed at distance from each other along horizontal line, while first or each first ventilation shaft passes through portion of ore body between air-inlet and air-outlet ventilation mines. Driving of second or each second shaft can be performed by cutting machine, or by drilling or explosive mining.
EFFECT: higher efficiency.
7 cl, 11 dwg
FIELD: mining industry.
SUBSTANCE: device has working and reserve ventilators, placed in ventilator chamber. By means of connecting channels ventilators are connected to air-conducting and air-draining channels, which com together in triple-output branch pipes, connected via ventilation channels to general mine ventilation network. Ventilation chamber is separated from air-conducting channels by longitudinal vertical wall. Air-conducting channels are made in form of one mine, separated by longitudinal horizontal wall between triple branch-pipes. Means for reversing air flow are mounted in branch pipes. In connection channels on force or suck-in side of ventilators cutting means are mounted. Assembling drift is connected to end of ventilator chamber.
EFFECT: higher safety, lower costs.
FIELD: mining industry.
SUBSTANCE: device has working and reserve ventilators, each of which has diffuser with rotary branch pipe, electric engine, connected to ventilator by transmission shaft via toothed sleeves, and devices, covering input and output of ventilator. Additionally plant is provided with doubled input box, made in form of mated individual boxes of working and reserve ventilators by rotating these to face each other relatively to vertical planes, passing through axes of ventilators rotation. Side inner walls of ventilators form up a common rib, on which axis of special piece is placed, in turns covering branch pipes of input boxes of working and reserve ventilators. When using ventilator plant near residential or administration buildings its output box is provided by muffler and cowl, and output branch pipes of ventilators are provided with controlling blades.
EFFECT: lower costs, higher durability.
2 cl, 4 dwg
FIELD: mining industry.
SUBSTANCE: method includes feeding fresh air along air ducts due to generic depression, and output stream is taken partially through supported mines due to generic depression and partially - through extracted space of extracted or previously extracted column by means of gas-sucking plant. Methane support control in fresh and output streams is maintained. From the surface into air duct a ventilation shaft is drilled and additional fresh air is fed therein in same direction with main stream. Adjustment of methane containment in air streams at extraction portion is performed by changing amount of air, fed additionally.
EFFECT: increased volume of fed fresh air without substantial reconstruction of ventilation system.
1 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: device has air feeding channels, positioned between support and coal massif and ventilator with pipe for sucking air away. Additionally device is provided with curtain of transparent plastic profiles with load, positioned in lower portion of curtain, positioned on carrying ropes, connected to driving drum. The latter is held on ceiling of support section and provided with electric drive with automatic and manual control. Lower portion of curtain enters a space, formed by walling of cable packer and grating. Ventilator, moved with extraction of coal massif, is positioned in ascending air stream in ventilation drift. Width of curtain equals width of support section, and length is in 1.3 times greater than vertical height of support.
EFFECT: higher efficiency.
FIELD: mining industry.
SUBSTANCE: device has air-intake channels and ventilator with air sucking pipe. Each air-intake channel is made in form of flexible plastic pipe with gate, placed on lower side of ceiling of support section or in ceiling body in parallel to its longitudinal axis. One end of air-intake channel is positioned at same level with working end of ceiling, and second one is connected to air sucking pipe, held below support section ceiling behind combine in parallel to axis of scrapping conveyer. Ventilator is mounted on mating support on out-flowing air stream. Flexible plastic pipes are made having U-like shape with crosspiece perforated along length, positioned along working edge of support section ceiling. Also, air-intake channel is provided with subs, each of which is made of two intertwined parts, mounted on rotation axis, separated by air-impenetrable insert. Subs and ceiling are interconnected with possible rotation of subs relatively to ceiling, and axis of subs is displaced relatively to axis of joint of support section ceiling and is parallel to it.
EFFECT: higher personnel safety, higher efficiency.
FIELD: mining industry, particularly ventilation of mines or tunnels during bauxite deposit development.
SUBSTANCE: method involves supplying pure air from field haulage roadway through blind drift of transport horizon into ore rising one due to mine depression; feeding part of air from rising horizon in intermediate blind drift; directing remaining pure air in layered air supply drift and then to entry ways for venting thereof; removing contaminated air through previously developed entry ways in layered venting drifts arranged in exhausted space at deposit ground along the strike; directing contaminated air through venting rises arranged in exhausted space along block boundaries at deposit ground to field venting drift drilled under deposit ground along the strike at venting horizon level and blind drift of venting horizon to field venting drift; supplying pure air from intermediate blind drift to field rise and then to field venting drift through blind drift of venting horizon. Intermediate blind drift and field rise are adapted to evacuate miners in emergency conditions.
EFFECT: increased efficiency and miner's safety due to changing pure and contaminated air mass flow within the boundaries of the block.
FIELD: mining industry, particularly to form venting system, which controls thermal mine conditions during combined mining.
SUBSTANCE: method involves forming overburden haulage inclined out of the pit extending across the strike up to interface between exposed and underground mines; extracting mineral from the haulage; constructing venting means and mounting support in approach mine; erecting heat-exchanging mines during opened mining.
EFFECT: elimination of time intervals during venting system construction and mining performing, simplified people evacuation in emergency and possibility to use heat-exchanging mines for other purposes.
FIELD: mining, particularly to vent ore and rock mines.
SUBSTANCE: method involves mixing fresh and exhaust air by blasting fuel mixture; forming suction jet, which discharges exhaust air outside the mine. Fuel mixture components are supplied by compressed nitrogen. Air mixing is performed with the use of mixture including sodium permanganate and hydrogen peroxide taken in ratio of 1:(3-10). The suction jet is formed by exhaust air ejection. Venting plant is arranged at bottom mine level. Device comprises body with nozzle arranged over fuel mixture and control panel. The device additionally has nitrogen, sodium permanganate and hydrogen peroxide vessels. Venting pipeline is secured to body nozzle. The venting pipeline is provided with jets to supply hydrogen peroxide and sodium permanganate connected with compressed nitrogen cylinder through control panel. The venting pipeline is composed of separate sections put one on another and provided with conical flares. The flares and adjacent sections define annular air suction slots.
EFFECT: provision of independent operation, simplified structure, increased operational safety and reduced power inputs for mine venting.
1 cl, 1 tbl, 2 cl