Ventilation valve of underground working
SUBSTANCE: valve contains a support frame (framing) mounted in the walls of tunnel, a leaf (web) hingedly fixed to the frame, closing-opening mechanism of the web mechanically connected to the web and framing and gap sealing unit between the web and the frame with a closed web, made of the elastic material placed between the approaching surfaces of the web and the frame when the valve is closed. In this case, the gap sealing unit is made in the form of a rigid collar placed along the perimeter of frame in the zone of abutment to the border of web, while on both sides of collar a flameproof elastic sealing profile made of material that increases considerably in the volume with heating is fixed, and collar height is smaller than the height of elastic sealing profile. The collar serves as a stopper for the initial deformation of elastic sealant when the web is closed and serves as a reinforcing element with an increase in the volume of sealant when it is heated.
EFFECT: ensuring reliable operation of vent valve.
SUBSTANCE: invention relates to the construction of jumpers in the mining industry, and more particularly to a device of jumpers in the supply workings of waste scouring faces and in the workings at fire sites in gassy mines. The jumper in the working is set without kerving, mobile and with opening window, closed at the back side with the shield sheet, with reinforced frame on the shield and the openings in the frame to access the radial rods connecting the frame itself, and a tube part with openings on the tube, which enters the middle of the shield sheet and through which a metal rod passes, engaged with the transverse rope, fixed by the anchors in the side walls of the working. At that at the explosion the shock wave moves the no-cut jumper and the shield shutter in the window, that directs a part of the wave on the boards and roof of the working, and the main shock wave is received by the rear fence consisting of bags of flame retardant inert dust, a second barrier shield on the metal rod, separating the bulk materials, and a set of the thrust racks at the output.
EFFECT: increasing the stability of the jumper.
SUBSTANCE: method comprises a kerving along the mine perimeter, mounting of bulkhead, its fixation on stands, fastening of water-tight material on the pressure bulkhead surface. After installation of bulkhead board on the walls and sill from the side of possible flow a smooth surface is created by application of a plaster layer, after that a water-tight material is sealed tightly.
EFFECT: improvement of reliability of the bulkhead sealing due to insulation of its joints with walls and sill.
4 cl, 2 dwg
SUBSTANCE: invention relates to the field of mining and can be used in underground mining of potash salts deposits for waterproofing of flooded areas and water-flooded mining openings. The surface of the cut under a concrete bridge is evenly coated with waterproofing expanding material, after which the concrete bridge is erected in the boundaries of the treated walls of the working and the working from the side of water influx on the perimeter is evenly coated with waterproofing material. In the concrete body the jumpers comprise either tubing diaphragm, or tube-hole, as well as control means of tightness of the jumper, and the wall coating of the working with waterproofing material is performed in case of emergency.
EFFECT: increasing the tightness of the contact of the jumper and comprising rock due to waterproofing of this contact.
3 cl, 1 dwg
SUBSTANCE: method for construction of stowing barricade in mine working involves installation of cast slag blocks on each other throughout the section of the stowed mine working. As cast slag blocks there used are rectangular prisms of similar sizes with bases in the form of sharp-cornered isosceles triangles. Stowing barricade is constructed in horizontal layers, in each layer of which there installed are two rows of cast rectangular prisms; besides, prisms of the first row are laid with their smaller side faces to the stowing mass. Equal side faces of prisms of the first and the second rows are laid tightly to each other, and to smaller side faces of prisms of the second row there installed are anchor posts excluding movement of slag blocks under action of stowing mass.
EFFECT: improving stability of stowing barricade; reducing the time spent on construction of stowing barricade.
SUBSTANCE: erection method of a non-cutting connection strap in a drift way made in mountain slope involves drilling of bore pits along the mine working outline, construction of an annular passage, laying into body of connection strap of two pipe lengths for delivery to the annular passage of cement grouting, installation into bore pits of steel rods, supply under pressure to the annular passage and bore pits of cement grouting. Connection strap is erected at some distance from the bore pit mouth, which exceeds distance from sliding surface formed in mounting slope to the bore pit mouth. Bore pits are drilled to the depth that is higher than propagation depth in the area of mine working, area of increased intensity of cracks occurring in massif at driving of mine working. Grouting mortar resistant to corrosive well water is delivered to bore pits, and distance between bore pits is determined on the basis of the following expression: S≤2α, where α - spread depth of grouting mortar to massif in the bore pit area.
EFFECT: improving erection reliability of a connection strap in a drift way made in mountain slope.
SUBSTANCE: ventilation valve includes a bed with mechanism of its opening and closing, which is hinged on a support frame, and a gap sealing device between the bed and the support frame. The valve bed consists of sections. Each section of the bed consists of two external layers, two intermediate layers and an internal layer. Each of the external layers is made in the form of a steel plate. Each of the intermediate layers is made in the form of a flexible plate from refractory material. Internal layer is made from heat insulating material. Gap sealing device between the bed and the support frame includes an annular seal from elastic material and an annular foaming gasket.
EFFECT: improving reliability of the ventilation valve owing to improving the rigidity of its bed and simultaneous prevention of the possibility of its buckling in three-dimensional space.
3 cl, 2 dwg
SUBSTANCE: method includes drilling of wells between earth surface and roof of an underground mine, erection of an insulating barrier link by supply of a hardening material into an underground mine whenever an emergency occurs related to self-ignition of coal. The section of the underground mine in the place of erection of the isolating barrier link is worked with increased height, which is gradually increased from borders of this section to its middle. The well is drilled between earth surface and a point with maximum height of the underground mine, and supply of the hardening material into a mine is carried out to complete filling of the section with increased height with hardening material. On the borders of the section with increased height of the mine prior to start of hardening material supply into an underground mine, barriers are installed, width of which is accepted as equal to or less than the width of the mine in the place of barriers installation, and the height of the barriers is determined using a special expression.
EFFECT: increased reliability of isolation of an emergency section in case of underground fires and reduced material and labour inputs.
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.
SUBSTANCE: method includes well drilling between the surface and roof of isolated underground working, construction of isolating barrier in the isolated underground working in case of emergency situation via pumping of hardening material into the working. Note that the cavity is created in the roof of isolated underground working before the emergency situation. Well drilling is done in geometrical centre of the cavity and supply of hardening material is done till complete cavity filling. Cavity size in direction perpendicular to the working longitudinal axis is taken equal to the width of isolated underground working, and height - equal to the product of half of isolated underground working width by tangent of hardening material spreading angle. Cavity size by the length of isolated underground working is defined by the proportion: lc≤2hc ctgφ, where lc - cavity size by the length of isolated underground working, m; hc - cavity height in the roof of isolated underground working, m; φ - angle of hardening material spreading, degree.
EFFECT: increase of reliability of emergency area isolation at underground fires.
SUBSTANCE: method includes well drilling between the surface and roof of isolated underground working and construction of isolating barrier on the way of fire movement in the isolated underground working and pumping the isolating filling agent into the working. Note that the cavity is created along the whole width of working roof, for example, by blasting the explosive substance charges in the lower part of the well, the height of which is defined by proportion. Grinded rock is supplied from the surface to the rock crushed by explosion and rocky embankment is created on the ground of isolated underground working. Quick-hardening cement is supplied to the rocky embankment, note that the supply of quick-hardening cement is done at time intervals equal to the period of quick-hardening cement setting. The supply of quick-hardening cement is stopped at the height of isolating barrier satisfying the proportion.
EFFECT: increase of reliability of emergency area isolation at underground fires and reduction of material and labour costs.
SUBSTANCE: invention relates to heating systems of various objects and is mainly intended to heat the air supplied to mine The heating unit for air supplied to the mine contains combustion chamber вair heater, fan, smoke exhauster and pipelines The unit has hot air distribution device and chamber for cold and hot air mixing, they are located in air supply duct upstream the mine fan, at that the smoke exhauster is located at gases output and has fan to create vacuum in gas flow and pressure in air flow, at that the hot air distribution device is made as ring out of pipe, having slot directed across the cold air flow, and connected to hot air pipeline.
EFFECT: the unit reduces expenses for air heating and excludes furnace gases ingress in air supplied to the mine.
SUBSTANCE: method involves ambient air supply to the station through a ventilation chamber and removal of waste air via tunnels, cross passages and another ventilation chamber. At movement of trains along the line the ambient air is supplied to the station through the ventilation chamber installed on one end face of the station simultaneously via the channels with which the same ventilation chamber is connected to the station and to the tunnel, via which the train departs from the station, and waste air is removed from the station through the ventilation chamber installed on the other end face of the station simultaneously via the channels with which the same ventilation chamber is connected to the station and to the tunnel via which the train arrives at the station. At absence of train movement along the line, the ambient air is supplied to the station through any of the above said ventilation chambers by having switched off the other one, and waste air is removed through ventilation chambers of adjacent stations connected for removal. In case of the train fire at the station the channels with which both ventilation chambers of the station are connected to the tunnels are shut off, and the ventilation chamber through which ambient air is supplied to the station is switched over to an extraction mode, thus removing smoke-filled air from the station simultaneously via the channels with which both ventilation chambers are connected to the station, and ambient air is supplied to the station through pedestrian routes. In case of train fire in the tunnel between adjacent stations, at the station to which passengers being evacuated are moving the ventilation chamber that is the closest to an emergency train is switched over to an inflow mode, and ambient air is supplied through it and through the channel with which the same ventilation chamber is connected to the tunnel to the emergency train, and at the other of the above said adjacent stations the ventilation chamber that is the closest to the emergency train is switched over to the extraction mode, and smoke-filled air is removed from the tunnel with the emergency train through the channel with which the same ventilation chamber is connected to the tunnel to the emergency train; with that, valves are closed in cross passages of the section of the line with the emergency train, and dampers are closed, which are installed at portals with which the tunnel with the emergency train is connected to the adjacent stations.
EFFECT: uniform removal of excess heat from tunnels under stationary operating conditions of ventilation and provision of specified air velocities on passenger escape routes in case of train fire at the station and in the tunnel.
FIELD: physics, control.
SUBSTANCE: making a high-performance method of operating control of main fan unit (MFU), operated in underground mining enterprises, using the results of statistical estimates of significance of influence of air parameters in a fan and diffuser MFU channels on the process of shaft ventilation. The method of operating control of the main fan unit for shaft ventilation includes the retrival of data from pressure and air flow rate sensors to the microcontroller unit (MCU), their processing and delivery of pilot signals to MFU driver unit. The novice is in that the sensors are located locate in fan and diffuser MFU channels and using the data retrieved by MCU from sensors, they are processed by measuring MFU productivity (QB) and static pressure (hct), achieved by MFU, checkout of significance of the data retrieved from the named sensors, and determination of absence or presence of shaft natural traction (he), and also the degree of its influence on the process of shaft ventilation using the method of statistical assessment of the level of significance of influence of the named parameters on MFU operating mode. Then by results of these estimates a pilot signal is formed to MFU driver unit or the data are kept storing without change of MFU operational mode.
EFFECT: method of statistical assessment allows to increase essentially the efficiency of MFU operating control and to exclude excessive energy costs.
FIELD: process engineering.
SUBSTANCE: invention relates to mining and can be used for venting of open pits and cleaning of air forced from working zone. Cleaner 1 comprises housing 14, dusty air feed assy 1 and cyclone chamber 9 with taper bottom. Said feed ass is arranged at rotary platform 15 and comprises air ducts 2 arranged in circle. Said ducts are equipped with blowers 3 and connected with circular channels 7. The latter are communicated with cyclone chamber 9 and provided with nozzles 1 to force air in circle into top section of cyclone 9. Vent pipe 10 is arranged coaxially above cyclone chamber 9. Running gear 16 is mounted under housing 14. Note here that this plant is equipped with rods 13 and guides 12 articulated with tops of rods 13 and suction part of air duct 12 that can turn vertically and horizontally relative to rods 13. Running gear 16 is composed of self-propelled chassis. Cyclone chamber 9 is equipped with dust collector 11. One or several ejectors 19 including confusers 17 and fans 18 are arranged inside vent pipe 10 at preset distance from its base.
EFFECT: higher efficiency of cleaning.
4 cl, 2 dwg
SUBSTANCE: method comprises sinking of gate road on two seams, holed by slopes, airing dead ends using ventilation systems of local ventilation and broken ore supply from sinking of gate road on the upper seam through the pre-passing wells to the conveyor line mounted on the lower seam. The gate and the belt roads along the lower seam pass in direct order to the border of the working area and their airing is carried out by general shaft depression on turning point scheme using the most remote inter-gate holing. Then sinking of spiral slope to the upper seam is carried out, and then in reverse order the gate road is passed on the upper seam with its airing through the wells, with the fans mounted on them. After holing of the gate road with air gates of the upper seam, airing is carried out on turning point scheme with the movement of air in the direct order on the workings on the lower seam, and with a backward motion of air in the workings of the upper seam.
EFFECT: invention enables to increase the efficiency of development by reducing the scope of development workings and time for preparation of the working area.
3 cl, 5 dwg
SUBSTANCE: method is carried out by means of preventing air leakage through the timely mounting and dismounting the ventilation jumper behind the working chambers, depending on the values of the thermal depressions. The method comprises implementation of the preliminary calculation of the minimum and maximum thermal depressions he min and he max, respectively, arising between the gate road and ventilation connections, and also between the gate road and embedded conveyor air gates as functions of the minimum he min=f(ΔHmin) and the maximum he min=f(ΔHmin) of values of the differences of the elevation points between the place of mining of working chambers and the place of air outlet from the gate road in the slope ΔHmin and ΔHmax. And the values ΔH are calculated based on the length of the extraction district, the number of pairs of exhaust chambers, the length of the exhaust area behind the ventilation connections, the width of the exhaust chambers, the width of the stope and the angle of dip. At that in the process of increasing the number of exhaust chambers and when achievement of the value of thermal depression equal to he min the jumper is dismantled, and when achievement of the value of thermal depression equal to he max, the jumper is mounted again.
EFFECT: improvement of efficiency of ventilation.
SUBSTANCE: complex protection of an open double-track aperture is created by creation of two curtains of gate type (1 - cold and 2 - warm degrees of protection) and a single curtain that forms a spreading jet of warm air (3 degree of protection), and also heating of a part of penetrated cold air by mixing with warm air due to overflow of air via holes in a wall that separates the double-track tunnel into "warm tunnel" and "cold tunnel". The system is designed to implement the method, represents slot elements of channels-air ducts for formation of flat air jets. A radial fan in the body, built into a curtain structure and collecting air for formation of the forced jet of the first degree of protection directly in front of it from the tunnel. A ventilation chamber and a prechamber placed above the tunnel, connected along separate channels-air ducts with slot elements of the second and third degrees of protection. Ventilation channels for formation of forced flows of warm air, special through holes in a partition between the "warm" and "cold" tunnels.
EFFECT: joint operation of all degrees of protection provides for protection against longitudinal, transverse and cyclone unauthorised penetration of external cold air into a tunnel, including protection against freezing of structures.
4 cl, 4 dwg
SUBSTANCE: invention relates to pit and mine ventilation and may be used to increase validity of determination of ventilation parameters in developing entries of coal mines and pits, in particular, aerodynamic and mechanical parameters of a flexible deformable air duct. In the mine they install an air duct with air leaks that do not exceed 5%. Blowdown with a fan is carried out, and they measure air flow and pressure. Diameters and length of the air duct are measured, Produced data is added depending on specific aerodynamic resistance and elasticity modulus of an air duct material.
EFFECT: increased validity for determination of impact of deformability of flexible ventilation air ducts at its aerodynamics, its forecasting in process of arrangement of a developing entry.
SUBSTANCE: unit includes an operating fan and a standby fan, each of which has an electric motor, a manifold and an adapter, a combined inlet box with a turning plug shutting off the inlet to operating and standby fans, and a turning flap shutting off outlets of operating or standby fans to an air supply pass. Above the fan unit with fans installed on draw-out trolleys there arranged in a noise-absorbing heat-insulated container is an air treatment unit, in the three unified air intakes of which there installed are noise absorption systems with turning shaft doors, which has an air conditioning system made in the form of a freon air cooler and an electric air heater, which allow air cooling or heating depending on ambient temperature. The air supply pass of the fan unit is equipped with a fire float at the well inlet.
EFFECT: enlarging functional capabilities of a unit; improving its reliability and possibility of quick installation and relocation to a new operation place.
SUBSTANCE: fan includes two basic modules of the first and the second stages adjacent to each other by a connection box-type insert so that each module includes a housing, an electric motor, an impeller installed immediately on the electric motor shaft. Impellers of the first and the second stages are made as per a counter-rotation scheme as all-welded impellers with non-rotational double plate blades of S-shape with a variable along the impeller radius by a geometry calculated by means of a single vortex method as jointly operating without any directing vanes based on minimum acoustic power (noise) of the fan, maximum efficiency, pressure and capacity.
EFFECT: creation of a fan for local ventilation of wells, which has improved aerodynamic characteristics and provides a possibility of a reversing operating mode at change of rotation direction of impellers and reduction of mass-and-dimensional characteristic of the fan.
SUBSTANCE: invention relates to automotive industry. This seal is fitted between vehicle bore edge and connected door. Said door is articulated with vehicle body along first preset section of bore edge. Said seal comprises locking section connected with tubular sealing section and sealing section wall. Sealing section wall comprises one lengthwise groove to make an integral film lengthwise hinge. Sealing section comprises one outer groove along seal section for connection with first preset bore edge section. Outer groove can decreased resistance of seal section to compression in direction of engagement at closure between bore and door.
EFFECT: decreased resistance of seal section to compression.
9 cl, 5 dwg