Development method of freezing overburden rock
SUBSTANCE: after performance of drilling and blasting operations in an overburden bench during layer-by-layer excavation of the blasted rock to an extended bench and a final blade circuit on the formation roof of the mineral deposit within excavation heading throughout the length of the slab there left is a layer of the rock with negative temperature. This allows developing a zone of stable freezing, warming it up and strengthening it by action of solar insolation during development of the upper part of the breakdown. The rest rock layer is excavated to a final blade circuit after disposal of the upper part of breakdown throughout the length of the excavation slab.
EFFECT: reduction of influence of repeated freezing on productivity of a drag line and provision of its stable operation during excavation of blasted rocks of an overburden slab.
3 tbl, 2 dwg
The invention relates to the mining industry and can be used in open development bedded deposits of the permafrost zone on the basis of bestransportnye system development overburden.
A known method of mining overburden, in which by means of a special organization of work and by limiting the length of the excavator unit depending on the determining factors can significantly reduce or even completely eliminate the influence of the secondary freezing breed on the operation of the equipment .
This technology includes: drilling and blasting of the upper pedostop, excavation blasted rock from the roof of the lower pedostop in predator, drilling and blasting the bottom of pedostop and excavation shattered rocks in the final contour of the blade.
The method is as follows.
First, two work benches blown up to clear the rocks of the upper pedostop. When performing the first Zachodni dragline prepares the ground standing, removing the upper part of the collapse, located on the roof of the lower pedostop. Moving along the front of the work, he excavatum portion of the volume of the upper pedostop in the direction of the goaf, creating predator. After completing work on the first section of the dragline moves to a pre-planned predator. Working here, he moves before the thwala and rocks of the upper pedostop, not included in the final contour of the blade in the scope of this outline.
Then organizes the work on the lower pedoscope. After blasting onto the surface of a slope of the blade dragline, performing a third section, preparing a site standing and at the same time excavatum volumes of the second pedostop in the final contour of the blade.
Excavating in the block must be executed before the completion of the freezing process, the length of the excavator unit should be no more than:
where Qe- operational performance of the excavator;
Tpthe temperature of the breed;
dcpthe average size of the piece;
andthermal diffusivity of rocks;
In - the width of the excavation Zachodni;
h - the height of pedostop;
Kp, Kwith, Kprespectively the coefficients of loosening, reset and preexcavation.
This principle limits the length of exploding block is successfully applied when developing one Stripping ledge.
The disadvantage of this method is that it does not account for the formation of the temperature field in the collapse blown permafrost overburden ledge defining the zone of freezing.
The formation temperature in the collapse of the blown permafrost is complex and determined by many is their factors such as: thermo-physical properties of rocks, phase transitions moisture, temperature changes, atmospheric air, temperature, humidity and density of the rocks, the capacity of overburden, the angles formed by the slopes, as well as the quality of explosive training. However, even the definition of true thermal diffusivity separate piece of rock located in different areas of the collapse is a very time consuming task.
From the point of view of the practice of mining the most efficient would be the definition of the zones of stable freezing breed in the collapse, and the choice of preventive technology development unit, providing excavation of rock without significant reduction in performance of dragline.
To determine areas of sustainable freezing of blasted rock, with high probability, it is possible, knowing the dynamics of temperature fields in the array permafrost in different periods of the year and the distribution of rocks in the collapse after the explosion.
Typical temperature fluctuations array permafrost in the annual cycle for conditions Kangalassky lignite deposits are presented in . The coupling temperature of the rock with the depth and period of the year is typical of other fields in the zone of permafrost rocks.
When is ravenii Stripping ledge, the distribution of the pieces in the collapse takes place in accordance with known strain pattern of the array when blasting , from which also it is obvious that the layer is destroyed breed with a strong negative temperature is in the lower part of the collapse.
Thus, to ensure stable operation of the dragline without significant reduction in performance during the entire period of testing of the unit must first be excaberate rocks from the upper part of the collapse to a certain depth, along the entire length of the block, laying them in predator and the final contour of the blade. At the top of reservoir minerals within excavation Zachodni leave a layer of rock with a negative temperature. This allows you to open the area of sustainable freezing and to ensure the thawing of blasted rock in the block with a corresponding reduction in its strength. Left a layer of rock excaberate in the final contour of the blade after cleaning the upper part of the collapse of the entire length of the excavation block.
Enhance the effect of the thawing zone sustainable freezing, you can:
1) by loosening the surface of the bulldozer-Ripper, creating additional surface reinforcing effect of solar insolation;
2) processing of surface-active substances which lower the temperature and strength marzani the rocks.
The proposed method of mining overburden, including the drilling unit and blasting of overburden ledge excavation blasted rock from the roof of the formation of minerals in predator and the final contour of the blade, and subsequent excavation of pretotal and the remaining volumes in the final contour of the blade, characterized in that the excavation shattered rocks Stripping ledge within the excavation Zachodni carry out a dragline layers and along the length of the block, leaving a layer of rock with a negative temperature at the top of reservoir minerals, due to the thawing and loss of strength of this layer under the influence of solar insolation in the process of working out the unit and ensure the stable operation of the dragline without significant reduction in performance during the entire period of mining block.
Leave a layer of rock with a negative temperature at the top of reservoir minerals is calculated by the following formula :
where taboutthe time of thawing, h; Tcf- average over a given period of time taboutsurface temperature, °C; hO. N.- the depth of thawing at the initial moment, m; Qabout- the cost of heat for defrosting 1 m3frozen rocks, kcal/m3; λ is thermal conductivity of rocks, kcal/is·h·°C.
All of this suggests that the present invention has novelty and inventive level.
The proposed technology has the following advantages compared with prototype:
under the influence of solar insolation in the process of working out the block is achieved by thawing and the softening zone of freezing and ensures stable operation of the dragline without significant reduction in performance during the entire period of mining block;
- increases the actual length of exploding block due to the stable operation of the dragline and increase its performance;
- reduces explosive blocks, the reduced downtime on the tracks of the excavator.
In Fig.1 and 2 shows how the development Merseyside overburden. In Fig.1 - cut on the front, along the excavation unit, and Fig.2 is a cross-section of the excavation zagadki.
The method is as follows. After blasting Stripping on the ledge of the excavator begins excavation collapse of blasted rock from the roof of the formation of minerals in predator and the final contour of the blade.
This excavation shattered rocks Stripping ledge within the excavation zagadki and along the length of the unit carry out a dragline in layers, leaving a layer of rock with a neg is a negative temperature at the top of reservoir minerals, due to the softening of the layer under the influence of solar insolation in the process of working out the unit and ensure the stable operation of the dragline without significant reduction in performance during the entire period of mining block.
Leave a layer of rock with a negative temperature at the top of reservoir minerals is calculated by the formula (2).
For example, let's do the calculation of accumulation of melt layer under the following conditions:
|The accumulation of melt layer hom, λm=1,7 W/(m·deg) (sand), Qbeats=59,74 MJ/m3(ice content of 150 kg/m3), the initial temperature of the rock tn0=-5°C.|
|T, h||Air temperature, °C|
|The accumulation of melt layer hom, λm=1,2 W/(m·deg) (loam), Qbeats=59,74 MJ/m3(ice content of 150 kg/m3), the initial temperature of the rock tn0=-5°C.|
|T, h||Air temperature, °C|
|The accumulation of melt layer hom, λm=0.9 W/(m·deg) (sandy loam peated), Qbeats=59,74 MJ/m3(ice content of 150 kg/m3), the initial temperature of the rock tn0=-5°C.|
|T, h||Air temperature, °C|
Then, for example, (table 1) with a width of excavation Zachodni 60 m, the block length 100m, ambient temperature of 20°C the amount of thawing per day will be 50X100X0,165=990 m3. This amount will correspond to the stable operation of the dragline performance 990 m3/change.
Sources of information
1. Copyright certificate №1624152, CL E21C 41/00. The method of mining overburden / I. I. Zawalski, A. S. Marchenko, S. N. Petrov and others (USSR); Appl. 17.10.1998; Publ. 01.10.1990. // Discovery, invention. - 1991. No. 4. - S. 89.
2. Panichev, C. C. the Effect of temperature on effective the industry development overburden drainage / S. C. Panichev, S. A. Ermakov // Physical-technical problems of development of mineral resources. - 2013. No. 2. - S. 132-138.
3. The Latrines A. C., Hunter C. N., Blinov A. N. The transformation of the structure of mountain ranges when blasting in open pits. - Ekaterinburg: Institute of mining, Ural branch of the Russian Academy of Sciences, 1999. - 140 C.
4 Potemkin S. C. Softening frozen and cemented rocks alluvial deposits. - M.: Moscow state geological prospecting Academy, 1995. - 120 S.
Method development Merseyside overburden, including the drilling unit and blasting of overburden ledge excavation blasted rock from the roof of the formation of minerals in predator and the final contour of the blade, and subsequent excavation of pretotal and the remaining volumes in the final contour of the blade, characterized in that in the process of layer-by-layer excavation of blasted rock overburden ledge within the excavation Zachodni along the length of the block leave some layer of rock with a negative temperature at the top of reservoir minerals, which under the influence of solar insolation roleplays and is softened during the testing of the upper part of the collapse in the process of working out the block and which Excalibur in the final contour of the blade after cleaning the upper part of the collapse of the entire length of the excavation block, the height of this layer of rock with a negative temperature R is Skitalets by the formula
where taboutthe time of thawing, h;
Tcf- average over a given period of time taboutsurface temperature, °C;
hO. N.- the depth of thawing at the initial moment, m;
Qabout- the cost of heat for defrosting 1 m3frozen rocks, kcal/m3;
λ is thermal conductivity of rocks, kcal/m·h·°C.
SUBSTANCE: method involves positioning of an automated complex for deep development relative to the working face considering the direction of ore bodies settings. Control of mine rock parameters is performed by means of control sensors of physical and mechanical characteristics of mine rocks for adjustment of a mine rock cutting force considering rotation speed of a working element and movement speed of the working element in a vertical plane throughout the cutting depth and cutting direction by means of hydromechanisms of telescopic retraction and a turning mechanism of the head section. Width of capture of the ore body plane in a horizontal direction is provided by means of the positioning mechanism of the complex relative to guides; with that, information on circuits of destructed mine rock is sent from control sensors of mine rock circuits to a system control unit.
EFFECT: increasing productivity, improving reliability and enlarging technological efficiency of destruction of rocks of different strength and coherence degree by controlling a cutting force in a zone of processing and formation in a surface layer of the processed massif of destruction zones considering strength characteristics of rock.
2 cl, 3 dwg
SUBSTANCE: method involves driving of permanent and working trenches, installation of downhole and main transport pipelines, extraction of a mineral deposit with wedge-shaped producing blocks. Driving of a working trench is performed by means of a parallel cut throughout the length of an open-pit field, and direction of a mine work front line is offset in a circumferential direction, the centre of which is a stationary rotary station of transport pipelines with radius R equal to maximum width of excavation cut to observe parallelism of the axis of transport pipelines to the mine work front line. The formed angle αi between radius R and the line of the main transport pipelines is determined from a mathematical expression.
EFFECT: improving efficiency of a fan development system.
SUBSTANCE: method involves general-purpose robot-aided mobile complexes for production, extraction, preparation and processing of mineral raw material and concentrates, a unit of automated control of operation of a mining mill, a technical system for advancing, current and prompt reception of mining and geological information. Fully automated reception of mining and geological information is performed based on build-up of a digital model using a software, cyclic-flow destruction of hard rocks and half-rocks by means of a safe shallow blast-hole drill-and-fire system and flow-through soft rocks - by means of a mechanical method, adaptive and deep differentiated separate mechanised extraction and loading of mineral and rock mass of different categories, types and grades, through-type separate ore preparation in all technological operations, selective primary benefication of mineral raw material using an adaptive gravitational technology and a physical and chemical combined technology, separate processing of concentrates at the final stage using metallurgical methods.
EFFECT: improving development efficiency of small ore and non-metallic deposits of gold, lead, stannum and other mineral deposits.
SUBSTANCE: method involves construction of annular transport ramps of opposite direction with single-lane traffic of dump trucks docking in turning platforms, reloading points, construction of open pit sides with triple projections at an inclination angle of 60÷75°, which are separated with safety berms of required width, formation in some part of the open pit field of one of ore bodies of transport ramp (TR) with width providing for two-lane traffic of dump trucks and adjacent to turning platforms, production of ore for both ore bodies by means of a drill-and-fire method so that pillars are left in the open pit sides; delivery of ore to a factory; stripping - to external dumps, construction of underground mine workings and a water drain system; the modification stage involves reconstruction of the eastern side of the open pit (VRT) with partial processing of its pillars and transshipment of dead rocks into an internal dump, change of some part of single-lane transport ramp along the eastern side for a steeply inclined one, transportation of ore from lower horizons of the open pit with articulated dump trucks (ADT) to the transhipment area, transhipment into large dump trucks for delivery to the factory, and creation of a rock cushion at the open pit bottom. Besides, first, from the lower turning platform in the worked-out area of the western side of the open pit (ZRT) there dumped is the main ramp, thus providing transport communication throughout the depth of the open pit; at the open pit side reconstruction stage, a two-lane ramp is in-series formed with projections with a vertical slope and berms of minimum width and rebuilt into a ramp with an increased inclination in opposite direction; a new dump ramp is formed from the turning platform in the south-western part of the open pit; water drainage is relocated to an inter-pipe zone; TR of opposite direction with single-lane traffic along the western side is put out; TR with an increased slope is constructed from the upper turning platform in the north-western part of the open pit; ZRT pillars are mined out; the new dump ramp is enlarged, and loading and transportation of some part of ore is performed from it at mining-out of ZRT pillars by equipment with remote control (RC) to a transhipment point; another part of the ore is transported to VRT bottom, thus creating an ore cushion, and after ZRT pillars are additionally mined out to technologically practical depth, VRT pillars are broken out onto the ore cushion, thus putting out the transport ramp.
EFFECT: improving efficiency and completeness of development of a mineral deposit by an open-pit mining method.
9 cl, 4 dwg
SUBSTANCE: invention refers to the mining industry and may be used during extraction and processing of molybdenum-containing ores. A method for extraction and processing of molybdenum-containing ores involves open-pit field zoning, outlining of solid ore sections different by processing characteristics, selective extraction on the outlined sections with ores allocation to separate the flow from the zones with increased molybdenite oxidation and its direction to luminescent separation. A powellite enriched product of separation after its size degradation is directed to bulk floatation obtaining a rough molybdenic concentrate. Then after molybdenite oxidation in the rough concentrate, powellite is leached in an environment of a molten mixture of chloride and sodium silicate. The tail product of separation after its size degradation is directed to bulk floatation obtaining the molybdenic concentrate.
EFFECT: increasing a level and quality of molybdenum extraction to the end product from balance molybdenum ores with higher degree of molybdenite oxidation.
SUBSTANCE: in order to enlarge the range of simultaneous processing and versions of control of a cutting force in the processing zone, formation of destruction zones is performed considering strength characteristics of rock as to width of the processed surface at variation of functional and technological parameters and their rational combination under conditions of selective development of deposits with complex structures. Strength characteristics of rock are fixed by mine rock strength recording sensors connected through a system block to a control system of operation of hydraulic cylinders, and drum balance is provided by distributed offset of hydraulic cylinders. Pressure of working liquid in piston cavities of the hydraulic cylinders is designed for a force required for rotation of turning levers.
EFFECT: increasing productivity, improving reliability and enlarging technological efficiency of destruction of rocks of different strength and coherence degree by controlling a cutting force in a zone of processing and formation in a surface layer of the processed massif of destruction zones considering strength characteristics of rock at selective development of deposits with complex structures by means of open-pit surface miners.
2 cl, 6 dwg
SUBSTANCE: method describes the selection of sections in the zone of wind currents, drilling of ledges by wells, charging them with explosive charges, blasting and excavation of the blasted mined rock. Meanwhile only upper ledges are drilled without subdrilling to the design outline of the edge profile, and charging and blasting of wells is performed stage by stage by blocks to the profile height. The correlation of the angle of incidence and profile of the open pit edge and the dominating wind speed under the mathematical formula is determined.
EFFECT: improvement of performance of ventilation of open pits and coal strip mines by ensuring of continuous streamlining of edges of open pits and coal strip mines by a natural air flow.
1 tbl, 3 dwg
SUBSTANCE: proposed method comprises removal of covering access rock at blast loosening by charges with air cushion in the charge lower end, mechanical loosening and push loading of rock, its piling and loading by excavator into carriers. Blast holes for access rock are drilled in mineral formation to the depth of air cushion at the charge bottom end. Single blasting is performed in well-by-well manner by the system of nonelectric initiation. Every second or third blast well is drilled in mineral formation of decreased hardness.
EFFECT: higher efficiency of destruction, power saving at mineral loosening.
2 cl, 2 dwg
SUBSTANCE: engineering-geological and hydrogeological survey is carried out to detect available landslide bodies. Then biolocation survey is performed, using the results of which they detect underground watercourses and discover their characteristics for detection of quantity and location of through filters. Afterwards on the surface of a ledge or a slope or a hillside outside the landslide body a header is arranged for collection of surface waters and some shallow watercourses. Afterwards from the foot of the ledge or the slope or the hillside they arrange a drainage mine deep into the ledge or the slope or the hillside outside the landslide body, from the surface of the ledge or the slope or the hillside they drill vertical wells until coupling with the drainage mine for through filers, couplings are arranged with connection chambers, through filters are lowered into vertical wells from the surface, and through filters are made in the form of pipes with perforated sections of holes and filtering elements made at the coupling level with underground watercourses. The header and the drainage mine are arranged with an inclination of i=0.005 towards the drain for self-flow of captured water.
EFFECT: provision of reliable prevention of landslide formation due to complete drainage of surface and underground waters from a landslide body.
2 cl, 3 dwg
SUBSTANCE: invention relates to mining industry and can be used at formation and stabilisation of ore quality at a stage of mining operations. The method involves determination of coordinates of a bucket of a mining unit, content of a useful component in the mined rock in the bucket of the mining unit as a conditional mathematical expectation of content of the useful component at an excavation point, which is determined as per results of preliminary testing of a network of wells in vicinity of the excavation point with determined coordinates, loading of the transport vehicle and its addressing to unloading sites considering content of the useful component in the transported mined rock. Depending on position of the mining unit in relation to location zones of technological sorts of the mined rock in a working face, a possibility is established and a task is created for predominant excavation of a certain technological sort at loading of the transport vehicle, in compliance with which positioning of the bucket of the extraction unit is performed in the working face at excavation; besides, mining-out of the rocks of the working face is started from an outline between technological types of the mined rock, the position of which and location zone of technological types is specified by geophysical methods during excavation as per the analysis data of the mined rock in the bucket of the mining unit.
EFFECT: improving parameters of quality and excavation of technological sorts of ores and mined rock for ore sorting.
SUBSTANCE: ripper differs from the known in that the fixed gas cylinder is provided with a movable gas cylinder, which piston is connected to the piston of the fixed gas cylinder with the rod. The axis passes through the rod, coupled with a sleeve covering the cylindrical housing and interacting through the joint with the ripper tip. The movable gas cylinder is connected to the rod of the hydraulic cylinder, arranged in the cylindrical housing on the opposite side of the ripper tip. The cavities of the movable and fixed gas cylinders are communicated through the air ducts and the air line with a reversing pneumatic compressor and pilot-operated check valves of bilateral action, and the cavities of the hydraulic cylinder are connected through the channels located in the housing of the hydraulic cylinder, and the hydraulic drive with the reversible hydraulic pump and the pilot-operated check valves of bilateral action.
EFFECT: invention enables to improve the efficiency of loosening soil by reduction of traction force and dynamic loads acting on the base machine, and transfer them to the zone of ground destruction in a wide range of variation of frequency of forced oscillations of the working body, and also to carry out the adjustment of operation of the mechanical system in case of frequency mismatch.
SUBSTANCE: invention relates to construction and can be used for loosening layer by layer of firm soils, as well as for removing ice and packed snow on the roads and sidewalks. A facility comprises a frame on which a shaft with teeth fixed on it is mounted in rotation supports, a shaft rotation drive, a bracket rigidly attached to the shaft with axles, on which in the rotation supports gear wheels with eccentric weights are mounted, engaging with a gear wheel mounted on the drive shaft in the rotation supports, and a gear wheel drive. The shaft rotation drive includes a gear pair, the drive wheel of which is connected to the drive shaft through the safety clutch, and the driven gear wheel is connected to the shaft with teeth fixed to it by means of an overrunning friction clutch. Engagement of the overrunning friction clutch is carried out by transmitting torsion torque from the shaft rotation drive.
EFFECT: invention provides increased efficiency of the device operation, reduction of energy intensity of the loosening process of the developed medium and improvement of reliability and life time of the drive components.
SUBSTANCE: invention relates to rig-down operations, for example, destruction of concrete, reinforced concrete, stone structures, beds and reinforced concrete floors, etc, knock-out of metallurgical plant lining and cement works rotary kilns in radioactive, chemical and biological environments. Proposed machine comprises caterpillar chassis, rotary platform to turn about vertical axis, boom with working tool, hydraulic cylinders with thermal protection, heat-resistant hoses to feed oil to hydraulic cylinders and working tool, force air cooling system including compressed gas cylinder fitted in heat-resistant jacket, air valve, gas feed hose, heat-resistant jacket enveloping heat-resistant hoses, heat sensor arranged at heat-resistant hose and control device. Air valve is equipped with electric drive. Note here that control device input is connected to heat sensor while its output is connected to electric drive. Hose is used to feed compressed gas to heat-resistant jacket.
EFFECT: long-term operation under higher temperatures.
2 cl, 2 dwg
SUBSTANCE: helical working organ includes a cylindrical stem with a tip and a helical blade with a diameter that increases bottom up and placed on the rod and the tip, and the helical blade and the tip are made with a toroidal profile. The radius of the toroidal surface of the tip and the diameter of the rod are selected from the ratio R/D=5, and the ratio of the length of the toroidal tip and the diameter of the stem makes h/D=1.85.
EFFECT: higher bearing capacity, reduced energy intensity of a process of insertion of a helical working organ, higher strength of soil due to even distribution and compaction of soil into walls of the well and along the helical working organ.
SUBSTANCE: device comprises a lower board 1, which by means of tension compression springs 2 (or another shock absorber) is connected to an upper board 3. On the lower surface of the lower board 1 by means of holders 4 there are air-hammer tools 5 fixed, such as serially produced perforators. They are fixed on the lower board 1 so that their sharpened tips may be arranged at different levels relative to the lower surface of this board. The device is suspended to a rope 6 of a lifting transportation device 7. The rope 6 is equipped with sensors that make it possible to measure rope tension, and the device itself is equipped with a control system designed to change rope tension, and thus to change static action force.
EFFECT: invention makes it possible to simplify design, to perform damage of various object and various materials, to increase efficiency of crushing.
3 cl, 1 dwg
SUBSTANCE: proposed module comprises driven plow with turn augers arranged wedge wise. Said turn augers are equipped with front active cutter heads that feature rpm exceeding that of turn augers and screw-type propulsors with adjustable floatation. Plow may be lifted by separate drive.
EFFECT: simplified design, expanded operating performances.
2 cl, 3 dwg
FIELD: construction, road engineering.
SUBSTANCE: invention relates to the field of earth works production in stripping works, digging pits and trenches under permafrost soil condition. The method to prepare permafrost soil for development is realised by water distribution along the surface of the unfrozen section. At the same time after natural thawing of soil to the depth of 0.15-0.20 m the thawed soil is removed, to form a "trough", and running water is sent into it along the surface of the frozen section with a flow rate of 5-10 l/m2 of the surface per hour. At the same time preparation of permafrost soil is carried out in summer period at the air temperature of more than 0°C and water temperature of at least +1°C.
EFFECT: higher efficiency of permafrost soils unfreezing.
FIELD: machine building.
SUBSTANCE: universal automatic controlled hydro-pneumatic hammer - HPH - consists of case with working tool encased in it, of striker, of rod, of working cylinder with working piston, and of cover of compression chamber for metering system of lubrication with oil channels. Also, the HPH contains a control unit - CU including a rotary-pinion sensor of oil volumetric rate of flow -OVRFS wherein there are built in induction sensors of electric signals of control of working mode electric valves - WMEV, striker notch SNEV and an automatic device for inaccuracy reset of the OVRFS.
EFFECT: simplicity of fabrication and assembly, high repair ability, and reliability in operation.
SUBSTANCE: device for tillage of natural ground includes frame, on which shaft is installed on rotary supports with cogs attached to it. Brackets are rigidly fixed to shaft, and on one of them in rotary support there are gear wheels mounted with eccentric weights, engaged with gear wheel installed on shaft in rotary supports. Ratchet wheels are fixed on brackets and are engaged with cams installed on frame. Device also includes drive of the main shaft and gear wheel.
EFFECT: reduction of dynamic loads at drives of shaft and eccentric weights.
SUBSTANCE: device for thawing of frozen soil or heating of soil section comprises a reservoir for storage of heating medium, intended for circulation in sleeve unfolded for soil heating, boiler with burner for heating of heating medium, besides boiler is connected to reservoir for storage of heating medium, fuel tank, containing fuel for burner in boiler, connected to burner in boiler, pump for provision of heating medium circulation, sleeve, through which heating medium circulates, arranged on soil to be heated. Pump is installed between sleeve and reservoir for storage of heating medium and provides for circulation of heating medium in sleeve. In the first version of device reservoir for storage of heating medium, boiler with burner, fuel tank and pump are fixed on common frame structure. Sleeve consists of two or more sections of sleeve, which in idle condition are wound onto according number of coil sections, besides each section of sleeve may be selectively connected to pump through ramified pipeline connected between pump and each section of sleeve. According to the second version - reservoir for storage of heating medium, boiler with burner, fuel tank and pump are fixed on common frame structure, at the same time volume of heating medium in wound sleeve exceeds volume of heating medium in reservoir for storage of heating medium.
EFFECT: improvement of devices for thawing of frozen soil.
22 cl, 4 dwg
FIELD: building, particularly for layer-by-layer loosening firm grounds and for removing ice and snow from motor roads and pavements.
SUBSTANCE: device comprises frame and shaft secured in rotary supports and installed on the frame. Device has shaft rotation drive, drum with teeth rotary installed on the shaft. Drum hub carries toothed wheels with unbalancing means engaging toothed wheel installed on shaft in rotary supports. Toothed wheels are connected to the drum by rotary supports. Device has toothed wheel drive and resilient members made as flat spring. One spring end is connected to the shaft, another one is secured to drum sidewall.
EFFECT: increased reliability.
2 cl, 3 dwg