Method of tunnel ventilation

FIELD: ventilation.

SUBSTANCE: method involves moving of air with moving trains through the circulation ventilation connection connecting the tunnels near the subway station, and through the station. To create the desired air flow through the subway station from moving trains in the tunnel and its regulation depending on the frequency of train movement, the aerodynamic drag of circulation ventilation connection is changed.

EFFECT: lower economic costs for the ventilation of tunnels and subway stations.

2 dwg

 

The technical solution relates to the ventilation of vehicle tunnels.

The known method of tunnel ventilation in U.S. Pat. Of the Russian Federation No. 2312222, CL E21F 1/00, F24F 7/00, publ. in BI No. 34 in 2007, including fresh and exhaust air through the ventilation paths connecting the tunnel with the atmosphere, thus changing the aerodynamic resistance in the tunnel by overlapping sections between the train and the wall of the tunnel controllable dampers that are installed on the train.

The disadvantage of this technical solution is that a large part initiated by train flow of air remains in the circulation ring within transhumance and is not used for ventilation of the station platform, and this unused portion increases with increasing train frequency, which leads to underutilization of the circulating air flows from the moving train.

The known method of tunnel ventilation on author. St. USSR №1588874, CL 21F 1/00, publ. in BI No. 32 in 1990, including fresh and exhaust air and the overlap of the bore of the tunnel before or after entry of a train into the entrance portal of the tunnel, when subjected to the ventilation shaft, combine it with tunnel and before or after entry of a train into the input portal block the flow area of the tunnel section between the output port of the om and the ventilation shaft. Exhaust air away through the ventilation shaft, and at the approach of a train to her open throttle cross section of the tunnel in this area and overlap it on the plot between the ventilation shaft and the entrance portal. On mine ventilation fresh air, and then again open the throttle cross section of the tunnel on this site.

The disadvantage of this technical solution is the inability to control air flow in the tunnel created by the piston effect of the trains, in the direction of its increase, which reduces the efficiency of air flow from the piston-like motion of the trains. Also in the case of actuator failure, the gate overlying the tunnel, to avoid collision of a train with the gate, you must stop the train in the tunnel that leads to disruption of train schedules.

The closest solution to the technical nature and essential features is the way of tunnel ventilation (see Tsodikov VIA Ventilation and heat underground. Ed. 2nd, Rev. and ext. M., "Nedra", 1975, s), including the movement of air moving trains circulating through the ventilation linkage connecting tunnels near a subway station, and through the station.

The disadvantage of this technical solution is that it does not take into account the change of a specific what about the air flow through the platform hall station from the reciprocating action of trains with a change in frequency of trains. At higher frequencies the motion of the specific consumption of air from one pair of trains is reduced. This leads to reduced efficiency of this method of tunnel ventilation stations, because the decrease of consumption must be compensated by increasing the productivity of the tunnel fans and cost of electricity.

The technical challenge is to improve the efficiency of the method of tunnel ventilation in normal mode due to the possibility of regulating the amount of the air flow and air flow in tunnels and stations by controlling the aerodynamic circulation ventilation breakthrough.

It is achieved by the method of tunnel ventilation, including air moving moving trains circulating through the ventilation linkage connecting tunnels near a subway station, and through the station, according to the technical solution to create the desired air flow through the metro station from moving in the tunnel trains and its regulation depending on the frequency of trains change aerodynamic drag circulation ventilation breakthrough.

Management of aerodynamic circulation ventilation breakthrough allows you to change the amount of air, podawa the constituent in the platform room station, and thereby more fully use of the air flow from the piston-like motion moving in the tunnel trains, reducing the required capacity of the tunnel fans and, as a consequence, their energy consumption.

The essence of the technical solution is illustrated an example implementation of the method and the drawings (figures 1 and 2).

1 shows a diagram of the method at a constant aerodynamic resistance circulation ventilation breakthrough (hereinafter windvoice), figure 2 - the same, while increasing aerodynamic resistance windvoice. Solid arrows in figure 1 and 2 show the direction of movement of the train, the dotted arrows, the direction of air flow.

Platform hall 1 underground stations (figure 1) is a passenger exits 2 to the surface. Windvoice 3 connecting tunnels 4, arranged at the end of the station. Train 5 moves through the tunnel 4 and initiates the flow 6 of air through windvoice 3 bypassing the platform hall 1 station. To change this model has windvoice 3 is item 7.

The method is implemented as follows.

From the piston-like motion of the train 5 when driving through the tunnel 4 is formed an air flow. Part of the flow 6 of the air passes through windvoice 3 bypassing the platform hall 1 station (figure 1). This part of the stream 6 enters the circulation ring air flow, razrushena inside the route between neighboring stations with open ventrone 3, and increases with increasing frequency of trains. When a high-frequency trains of the flow 6 of the air is the main part of the circulation ring air flow from moving trains. To completely or partially to direct part of the flow 6 of air through the platform hall station 1 and increase it to air, change the aerodynamic resistance windvoice 3 using item 7 (figure 2). Thus, the piston action of trains with the regulation of the flow 6 of air through windvoice 3 reduces required for ventilation station performance tunnel fans and, accordingly, the energy consumption for them and thus increase the efficiency of the method of tunnel ventilation.

Method of tunnel ventilation, including air moving moving trains circulating through the ventilation linkage connecting tunnels near a subway station, and through the station, characterized in that to create the desired air flow through the metro station from moving in the tunnel trains and its regulation depending on the frequency of trains change aerodynamic drag circulation ventilation breakthrough.



 

Same patents:

FIELD: construction.

SUBSTANCE: machine comprises a scraper of box type (1), a scraper hoist (2), head (3) and tail (4) traction ropes, diverting blocks (5) for traction ropes, a loading ramp (6). The scraper comprises side walls (7) and a rear wall (8), in its lower part inclined at the angle to the horizon. On the rear inclined wall of the scraper at the angle (10) of fixation of a tail traction rope to the scraper on brackets (11, 12) fixed on the walls a shaft (14) of cylindrical shape is installed with the possibility of rotation on the horizontal axis (13), and its lower edge is arranged with displacement downwards relatively to the lower edge of the rear wall of the scraper and is distanced from it along the horizontal line towards the tail traction rope. Brackets on the rear wall are fixed with the help of a board (15) with the possibility of its displacement in the vertical plane along the wall and fixation on it with the help of fastening elements (16). The shaft axis is installed in horizontally aligned slots (17) of brackets with the possibility of their displacement and fixation.

EFFECT: decreased energy intensity and wear of a device.

3 dwg

FIELD: machine building.

SUBSTANCE: method of connection includes connection of sections of flexible spiral-welded pipes, besides, sections of flexible spiral-welded pipes with right alignment of a spiral-welded seam are joined with sections of flexible spiral-welded pipes of equal length with left alignment of a spiral-welded seam.

EFFECT: invention improves pipe reliability.

4 cl, 1 dwg

FIELD: mining.

SUBSTANCE: flushing pulp is delivered in stages forming several layers between which drain pipes are installed using leakproof hose parallel to longitudinal axis of flushed space. Drain pipes are attached by one end to leakproof hose. Each drain pipe is extended till it reaches opposite dam, then the housing is detached from drain pipe through the opening in filter dam and is removed for further use. When installation of project quantity of drain pipes is completed, process of flushing pulp delivery is resumed.

EFFECT: improving efficiency of flushing works due to reduction of flushing pulp runoff period.

1 dwg

FIELD: mining.

SUBSTANCE: filling mixture compound contains the following, wt %: water 28.57-44.44 and ashes TPP 4.32-14.32, slag TPP 22.55-42.58, quick high-calcium lime of the first grade 18.92-29.29 or water 28.57-44.44 ground together to maximum grain size 0.16 mm and ashes TPP 5.99-16.13, slag TPP 28.30-47.04, quick high-calcium lime of the first grade 12.99-23.67 ground together to maximum grain size 0.08 mm.

EFFECT: reducing labour and material expenses, improving ecological situation in the area of abandon mine by means of creation of water-proof and shrink-proof massif.

1 ex, 2 tbl

FIELD: blasting.

SUBSTANCE: breathing apparatus may be used for work performance safe from fire and explosions, in mines with exhalation of methane, coal dust, technologically filled with carbon dioxide. In such environment, the miners work in breathing apparatus consisting of a mask and a cylinder with compressed air. Thereat the mask has an adapter made with one outlet of air under the mask and the two inlets with a tap. Depending on the duration of the work the tap is switched for the flow of air from the cylinder or from the air duct-tube through a flexible tube in a metal sheath.

EFFECT: reduced mass of the individual cylinder with air.

FIELD: mining.

SUBSTANCE: method includes well drilling between surface and roof of underground mine working, delivery of hardening material to the mine working in case of emergency situation related to coal fire breeding. Section of underground mine working is driven in the place of isolating barrier wall erection; height of mine working is increased towards the middle of the section. Well is drilled between ground surface and point of maximum height of underground mine working. Hardening material is delivered to the mine working till mine working section driven with various height is completely filled. Maximum height of mine working in the middle of this section is determined by expression hmax≥hb+tgφ·b/2h where hmax is maximum height of underground mine working on the section of isolation barrier wall erection, m; hb is height of underground mine working outside the section within which isolation barrier wall is erected, m; φ is angle of hardening material spreading, degrees; b is width of underground mine in the rough, m.

EFFECT: improving reliability of emergency section isolation during underground fire.

2 dwg

FIELD: ventilation.

SUBSTANCE: method involves feeding the outside air, the organisation of directional movement of air through the tunnels, and removal of exhaust air. At that, the outside air is supplied to an amount equal to 20-30% of the estimated amount of air on excessive heat for ventilation sufficient to maintain the normative content of oxygen and carbon dioxide in the air medium of underground. The forced recycling is carried out between the stations of a mixture of outdoor and tunnel air, in that process the mixture is subjected to a thermodynamic processing to achieve the required for the underground temperature-humidity air conditions.

EFFECT: possibility of year-round, regardless of weather conditions on the surface, maintaining of the regulatory temperature-humidity parameters and, oxygen and carbon dioxide content in the air medium of underground, reduction of intensity of blast flows, reduction of costs and timing of construction of underground lines.

3 dwg

Mine fan system // 2462594

FIELD: mining.

SUBSTANCE: system includes operating and stand-by fan units, each of them contains electric motor, rotor, double inlet box with demountable sectors, detachable collector and diffuser. Rotor supports are radial and radial-thrust bearings. Fan of each fan unit of the system is additionally equipped with detachable semi-housing. Rotor radial bearing is located on rotor shaft between electric motor and double inlet box of fan system.

EFFECT: improving reliability, maintainability and reducing cost of repair of main ventilation mine fan systems.

3 dwg

FIELD: mining.

SUBSTANCE: method involves installation of ascending air pipeline channels on board and beyond the limits of the pit and their connection by main air pipeline channels, arrangement of suction holes of air pipeline channels in working zones of the pit, creation of natural draft in channels due to wind head and air temperature difference inside and outside the channels, movement of contaminated air along channels beyond the pit levels and control of its flow. During winter time the movement of contaminated air from ascending channels installed aboard the pit to ascending channels located beyond the pit limits is performed along bypass air pipeline channels flooded in natural water sources. Control of the air flow removed from the pit is provided by changing the ratio of air flow rates in bypass and main channels.

EFFECT: increasing pit ventilation efficiency.

1 dwg

FIELD: mining.

SUBSTANCE: gate includes frame and bed filled with ferrofluid. Bed is designed bilayered and installed with possibility of location in stationary guide posts and in upper part of gate behind the frame. Gate is provided with source of magnetic field for interaction with ferrofluid in bed cavity. Bed covering in expanded state is located in vertical guide posts with possibility of thickening and thrust-locking interaction with inner edges of frame openings and guide posts. Source of magnetic field may be designed as a solenoid located in transverse plane around bed.

EFFECT: enhancing strength of bed, reliability of tightening of gaps between box and bed of protective gate, providing automatic locking of bed in box without use of any special mechanisms.

2 cl, 3 dwg

FIELD: mining.

SUBSTANCE: invention concerns mining and can be used at stratum development of minerals with swelled ground rock for guarding of district development drifts. Guarding method includes implementation of district development drifts 1, fixing of district development drifts, stratum weakening of minerals be making grooves 2,3. Powers of swelling layers of minerals stratum are defined. Stratum weakening is implemented by creating of vertical rooves 2,3 in sole, in the immediate vicinity of wall of working, from side of gradient and pitch of seam, at that groove length from side of gradient 2 is accepted as equal to maximal power of swelling stratum, but not more then 2000 mm, and groove length from the side of seam pitch 3 is equal to minimal power of swelling stratum.

EFFECT: decreasing of swelling of soil rocks, decreasing of costs for supporting district development drafts, increasing of spatial work concentration, providing of easier method of groove implementation.

1 dwg

The invention relates to the construction and reconstruction of underground and underwater structures, such as tunnels, crossing the quicksand and water hazards

The invention relates to the construction of subways, directly to the reconstruction of their individual units if the need arises

The invention relates to railway transport

FIELD: mining.

SUBSTANCE: invention concerns mining and can be used at stratum development of minerals with swelled ground rock for guarding of district development drifts. Guarding method includes implementation of district development drifts 1, fixing of district development drifts, stratum weakening of minerals be making grooves 2,3. Powers of swelling layers of minerals stratum are defined. Stratum weakening is implemented by creating of vertical rooves 2,3 in sole, in the immediate vicinity of wall of working, from side of gradient and pitch of seam, at that groove length from side of gradient 2 is accepted as equal to maximal power of swelling stratum, but not more then 2000 mm, and groove length from the side of seam pitch 3 is equal to minimal power of swelling stratum.

EFFECT: decreasing of swelling of soil rocks, decreasing of costs for supporting district development drafts, increasing of spatial work concentration, providing of easier method of groove implementation.

1 dwg

FIELD: ventilation.

SUBSTANCE: method involves moving of air with moving trains through the circulation ventilation connection connecting the tunnels near the subway station, and through the station. To create the desired air flow through the subway station from moving trains in the tunnel and its regulation depending on the frequency of train movement, the aerodynamic drag of circulation ventilation connection is changed.

EFFECT: lower economic costs for the ventilation of tunnels and subway stations.

2 dwg

FIELD: construction.

SUBSTANCE: hydrotechnical deferent tunnel with reinforced concrete lining is designed as a working 1 in the rock with a cross section in the form of a figure of a constant width and in contact with the bearing reinforced concrete lining 2 with the external and the internal surfaces made in the cross-section in the form of a figure with a constant width. The cross-sections of the working 1, of the external surface in contact therewith, and of the internal surface of the reinforced concrete lining 2 are made in the form of a Reuleaux triangle. One of the coinciding corners 3 of the Reuleaux triangle of the working 1, the external and internal surfaces of the reinforced concrete lining 2 is located in the vault portion 4 of the tunnel with the reinforced concrete lining.

EFFECT: increasing the strength, stability and reliability of the hydrotechnical deferent tunnel in complex engineering geological and seismic conditions.

1 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.

2 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes use of device providing for manufacturability of assemblage of casing and drilling columns and concurrent drilling by two columns, provided with independent drives, and drilling, by casing column, of non-stable rock solids performed with frequency no greater than one calculated from formula

where Vmec - mechanical drilling speed, m/min, Fr - friction forces against rotation, Ften - friction forces against linear displacement, R - casing column radius, m, α - angle between vectors of directions of linear and rotating movements.

EFFECT: higher effectiveness, higher productiveness, higher reliability.

2 cl, 5 dwg, 1 ex

FIELD: mining industry.

SUBSTANCE: method for extraction and underground use of coal includes cleaning extraction and dumping of coal, fixing and controlling ceiling and transporting coal along face to drift. On the drift, in moveable generator, coal is pulverized for intensive burning with use of jets in water boiler firebox, where high temperature of steam is achieved (about 1400 C°), enough for decomposition of water on oxygen and hydrogen. These are separated, then oxygen is fed back to jets, and hydrogen is outputted along pipes and hoses in drifts and shaft. Variants of underground generator for realization of this method are provided. Also provided is method for extraction of disturbed coal beds by short faces. It includes extraction and dumping of coal on face conveyor, fixing of ceiling behind combine, moving conveyor line and support sections in direction of cleaning face displacement, control of ceiling with destruction and partial filling. Extraction of coal is performed in short curvilinear faces by long stripes along bed, in straight drive without forwarding drifts, with preservation and reuse of ventilation and conveyor drifts, equipped with mounting manipulator robots, with fixing behind combine by automatically operating support deflectors without unloading and displacing sections in area of coal extraction. Extraction and transporting of coal is performed by fast one-drum combine and curvilinear reloading conveyor, supplying coal to drift conveyor or immediately to underground gas or energy generator placed immediately on drift. Also proposed is face scraper conveyor for realization of said method, wherein pans are made with step along front face profile, greater, than along back one, while forming common line curved towards face with constant curvature. Also proposed is a method for controlling complex for unmanned coal extraction.

EFFECT: higher efficiency, effectiveness, broader functional capabilities.

8 cl, 5 dwg

FIELD: gas, oil, oil refining and other industries.

SUBSTANCE: invention relates to building and operation of underground reservoir in stable rocks, for instance, soluble salt deposits. Method includes delivery of water and putting out brine along water feed and brine lifting pipes placed one inside the other, charging and storing of gas in underground reservoir. After brine lifting, reservoir is dried and then is filled up with alternating layers of absorbent and inert porous material, volume ratio 2:1, delivered along clearance between water feed and brine lifting pipes. Brine lifting pipe is perforated in lower part in height of reservoir and it is installed in lower part of reservoir. Difference between angles of repose of absorbent and inert material does not exceed 10 degrees. This done, reservoir is filled with gas delivered along perforated brine lifting pipe.

EFFECT: increased productive volume of reservoir owing to sorption of gas on surface of absorbent, reduced cost of gas storing.

1 dwg

Up!