RU2205753C2 - Complex for preparation of concrete mix in underground conditions - Google Patents

Abstract

FIELD: construction engineering, particularly, devices for preparation of concrete mixes. SUBSTANCE: complex includes mixing drum, transformation tracks parallel to each other, hoisting mechanism connecting vehicles and mixing drum. Hoisting mechanism is made in form of overhead-track hoist secured to mine working roof with grab unit. Mixing drum with drive and reducing gear is installed on platform secured to mine working floor. Mixing drum due to internal guides is made for continuous preparation and unloading of concrete mix into vehicles. Section of complex parallel tracks is connected with main mine tracks and made for providing of continuous delivery of loose materials and dispatching of concrete mixes in vehicles. Vehicle with cement has air-driven pump for controlled supply of cement from vehicle to mixing drum. Vehicle with concrete mix has metering device in form of air ejector and screw conveyors. EFFECT: higher efficiency and operate reliability of complex mechanisms for preparation of concrete mix. 3 dwg

Description

 The invention relates to the field of mining and can be used for the preparation of concrete mix during underground mining of mineral deposits.

 The well-known complex "Monolith-2" (see Stumpf G.G., Egorov P.V., Lebedev A.V. Fastening and maintenance of mine workings. Handbook of workers. M., - Nedra - 1993. -p.200), consisting of a cement truck, a batcher-dispenser, material hoses, a stacker-manipulator, electrical equipment and formwork.

 The complex BUK-3U5 is known (see Stumpf G.G., Egorov P.V., Lebedev A.V. Fastening and maintenance of mine workings. Reference book of the worker. -M., -Nedra -1993. -S.203), consisting from a paver, an underground mechanical stand, a pipeline, a damper, a reloading device with a hydraulic drive and with its control panel.

 A known installation for feeding and dosing materials in a concrete-mixing unit (see AS 688336, 28 V 7/04), including a hopper, dispensers, platform, pump and pipeline.

 The disadvantage of these complexes and devices is the low productivity of concrete preparation, the lack of continuous loading of inert materials and unloading of concrete mix, and significant volumes of production facilities.

 Closest to the proposed technical solution is the installation for the preparation of concrete mix (see AS 6888344, B 28 C 5/08), including a mixing compartment with consumable containers, a transporting device in the form of a self-propelled hopper, parallel transport routes, a lifting mechanism, made in the form of a chess elevator.

 The disadvantage of this device is the lack of reliability of the complex of mechanisms, the lack of continuity of loading of inert materials and unloading of concrete mix, sufficiently large volumes of production space for the preparation of concrete mix in underground mine conditions.

 The single technical result of the proposed technical solution is to increase the productivity and reliability of the complex of mechanisms for preparing the concrete mixture, ensuring a continuous process of loading the starting materials and unloading the concrete mixture, reducing the volume of the underground chamber for preparing the concrete mixture in the mine.

 A single technical result is achieved by the fact that in the known complex for preparing concrete mix in underground conditions, including a mixing drum, parallel transport paths, a lifting mechanism connecting transport containers and a mixing drum, the lifting mechanism is made in the form of a crane beam, fixed in the roof of the mine, with a clamshell installation, and a mixing drum with a drive and gear is mounted on a platform fixed to the soil of the mine, while the mixing bar the ban due to internal guides made it possible to continuously prepare and unload concrete mixture into transport tanks, a section of parallel transport routes of the complex is connected to the main shaft paths and is configured to provide in-line delivery of bulk materials and dispatch concrete in transport tanks, and the transport tank with cement it is equipped with a pneumatic pump for the controlled supply of cement from the tank to the mixing drum, and the transport tank with concrete mix bzhena metering device as a pneumatic ejector and screws.

 Improving the performance and reliability of the complex of mechanisms for preparing concrete mixture, ensuring a continuous process of loading and unloading materials is carried out by a lifting mechanism made in the form of a crane beam fixed in the roof of a mine (for example, by anchoring) to ensure delivery of bulk materials to the mixing drum (gravel, dolomite, etc.) from transport tanks (for example, mine carriages VG-40). The crane beam is equipped with a clamshell installation, carrying out the capture of bulk materials and their delivery to the mixing drum.

 The continuous process of unloading the concrete mixture and reducing the volume of the underground chamber for preparing the concrete mixture is ensured by installing a mixing drum, drive and gear on a single metal frame (platform), fixed (for example, by anchoring) to the soil of the mine. The receiving hopper of the mixing drum is made with the possibility of loading the initial components and unloading the concrete mixture, loading of the initial components is carried out when the mixing drum rotates in one direction, and the concrete mixture is unloaded when the mixing drum rotates in the opposite direction. To ensure the loading process, preparation of concrete mixture and unloading, the mixing drum is equipped with internal guides around the perimeter of the drum. A transport tank (for example, a mine car VG-4.0) for the delivery of cement to the concrete preparation complex is equipped with a special pump (working on the principle of air ejection), which provides an adjustable cement intake from the tank and transmission through a cement pipeline (made, for example, from a hose diameter 50 or 100 mm) into the mixing drum. Cement intake is controlled by a metering device mounted on a pneumatic pump. A transport tank (for example, a mine carriage VG-4.0) with concrete mixture is equipped with a pneumatic ejector device and two screws (located inside the tank) to provide a metered discharge of concrete mixture through a concrete pipeline (made, for example, from a hose with a diameter of 150 or 200 mm) place of work.

 To reduce the volume of the underground chamber of the complex for the preparation of concrete mix, the section of transport tracks is made of two mine railroad tracks with a parallel arrangement and arrangement of transport tanks with raw materials on them, a complex for preparing concrete mix and transport tanks with concrete mix. The possibility of providing continuous delivery for the complex of source materials and sending concrete mix is provided by connecting the section of the transport routes of the complex with the main mine tracks.

 The specified technical solution is illustrated by drawings, where in Fig.1 shows a General view of the camera with a complex for preparing concrete mix in lifting conditions, in Fig. 2 shows a top view of a chamber with a complex for preparing concrete mixture; FIG. 3 shows a section of a chamber with a complex for preparing concrete mixture.

 The complex for the preparation of concrete mix in underground conditions is located in chamber 1 (mining) and consists of a mixing drum 2, a drum drive 3 and a gear 4 installed on a platform 5 fixed to the soil of the chamber (mining) 1; transport paths 6 parallel to each other with transport containers 7 for bulk materials located on the tracks, transport tank 8 with cement and transport tank 9 with concrete mixture; a lifting mechanism 10 in the form of a crane beam fixed to the roof of the chamber (mining) 1 with a clamshell installation 11. In the chamber 1 there is a reservoir 12 for supplying water to the mixing drum 2. In the mixing drum 2 there are internal guides. Transport paths 6 of the complex are connected to the main mine paths 13. The transport tank with cement 8 is equipped with a pneumatic pump 1 for supplying cement from the tank 8 to the mixing drum 2 through a cement pipeline 25. The transport tank 9 with a concrete mixture is equipped with a metering device 16 in the form of a pneumatic ejector and two by screws 17.

 The work of the complex for the preparation of concrete mix according to the proposed technical solution is as follows. Water (in a certain volume) is supplied to the mixing drum 2 from the tank 12, cement is supplied from the transport tank 8 located on the paths 6 to the mixing drum 2 by a pneumatic pump 14 through a cement pipeline 15 (in a certain ratio to the volume of water and bulk materials). From the transport containers 7 by the clamshell installation 11, mounted on the lifting mechanism 10, bulk materials are taken (in a certain ratio) and loaded into the mixing drum 2. The mixing drum 2 is rotationally driven by the drum 3 drive and the gearbox 4 installed on the platform 5 and due to the internal guides made in the mixing drum 2, the initial components are mixed and the concrete mixture is prepared. When a concrete mixture is formed in the mixing drum 2, the concrete mixture is unloaded from the drum 2 by changing the rotation of the drum 2 in the opposite direction and due to the inner guides of the drum 2 into the transport tank 9 installed on the tracks 6, followed by unloading the concrete mixture by means of a metering device 16 and screws 17 at the site of concrete work.

 If necessary, prepare the subsequent volume of the concrete mixture, the above cycle is repeated.

 Delivery of the initial components (cement, gravel, dolomite, sand) for the preparation of concrete mix is carried out in transport tanks 7 and 8 along the shaft paths 13 and transport routes 6 of the complex. Water in the tank 12 and air for the pneumatic ejector 16 and the pneumatic pump 14 is supplied from the mine communications.

The preparation of the chamber with a set of mechanisms and equipment for the preparation of concrete mix in underground conditions was carried out at the horizon of +185 m of the mine of the Sheregesh mine. The complex of mechanisms for preparing concrete mixes manufactured, installed and working according to the proposed technical solution made it possible to provide the necessary volumes of concrete mix for fixing mine workings (the shift capacity of the complex for concrete is up to 65 m ³ ), and the reliability of the mechanisms and equipment is quite high (during 6 months from the launch of the complex there were no technological downtime), the continuity of the processes of loading the starting components into the mixing drum and unloading bet onone mixture. The main dimensions of the chamber for the complex for the preparation of concrete mix in the mine of the Sheregesh mine department were: length 3.0 m; width 6.3 m; height 9.6 m. Chamber volumes of similar concrete-mortar complexes are 2.5-3.0 times higher than chamber volumes according to the proposed technical solution.

Claims (1)

 A complex for preparing concrete mix in underground conditions, including a mixing drum, transport paths parallel to each other, a lifting mechanism connecting transport containers, and a mixing drum, characterized in that the lifting mechanism is made in the form of a crane beam fixed to the roof of a mine working, clamshell installation, and a mixing drum with a drive and gearbox mounted on a platform mounted on the soil of a mine, while the mixing drum, due to internal guides, is made with with the possibility of continuous preparation and unloading of concrete mixture in transport tanks, the section of parallel transport routes of the complex is connected to the main shaft paths and is configured to provide in-line delivery of bulk materials and dispatch concrete in transport tanks, and the transport tank with cement is equipped with a pneumatic pump for controlled cement supply from the tank to the mixing drum, and the transport tank with concrete mixture is equipped with a metering device in the form of pneumatic th ejector and augers.

Images