RU2091585C1 - Device for formation of shotcrete support - Google Patents

Abstract

FIELD: mining; applicable in support of mine underground workings. SUBSTANCE: the offered device has manipulator in form of two telescopic posts 4 hinged to platform 2. Manipulator is provided with cylinder 5 having nozzles 6. Cylinder 5 has two parallel channels 7 and 8. Each nozzle 6 is connected with parallel channels 7 and 8 by means of holes 9 and 10 intersecting at acute angle. Cylinder 5 is brought with the help of manipulator to treated surface. Concrete mix through concrete-conveying pipeline is supplied to channel 7 of cylinder 5. To accelerate supply of hardening mix, air is supplied by air main line 12 to channel 8. Air is mixed with hardening mix in holes 9 and 10. Accelerated hardening mix through nozzles 6 by means of manipulator is applied to surface of working over its perimeter irrespective of its profile. Width of treated surface may be regulated by length of cylinder 5. EFFECT: higher efficiency of support of mine workings by shotcreting due to possibility of control of nozzle trajectory depending on profile of cross-section of working and increase of area of treated surface over length of working. 5 dwg

Description

 The invention relates to mining and can be used for fastening underground workings.

 Known devices for the construction of spray concrete supports in underground workings, including a machine for applying spray concrete, a concrete hose and nozzle (Voronin V.S. Nabryzb Concrete Support, M. Nedra, 1980, pp. 65-99).

 A disadvantage of the known devices is that it is necessary to use manual labor when applying spray concrete on the rock surface of the mine. This negatively affects labor productivity and the safety of work, and also does not allow to achieve high rates of construction workings and the quality of spray concrete support.

 As a prototype, a device for the erection of spray concrete lining (ed. St. N 885563 class E 21 D 11/00) was selected. The device includes a spray concrete machine, a concrete conduit, a manipulator with a nozzle for applying concrete mixture. The manipulator is additionally equipped with nozzles and is made in the form of a bent pipeline, and a monorail is installed on the permanent lining with the possibility of interaction with the manipulator by means of a movable trolley.

 A disadvantage of the known device is that its design provides for a fixed distance from the nozzle to the surface of the mine, regardless of the contour of its cross section.

 The aim of the invention is to increase the efficiency of fixing the workings with spray concrete due to the ability to control the path of the nozzle depending on the profile of the cross section of the workings and increase the area of the surface to be worked out along the length of the workings.

 This goal is achieved by the fact that the device for erecting spray-concrete roof support includes a spray-concrete machine mounted on the platform, a manipulator with a nozzle system, a concrete conduit, an air supply line. The manipulator is made in the form of two telescopic racks pivotally mounted on a platform and interconnected by a cylinder.

 The cylinder has two parallel channels, one of which is connected to the concrete duct, and the other to the air line, and on the outer surface of the cylinder there are a number of nozzles, each of which is connected to parallel channels through holes intersecting at an acute angle.

 In FIG. 1 shows the proposed device; figure 2 diagram of the movement of the manipulator; in FIG. 3 cylinder; figure 4 section aa in figure 3; figure 5 is a section bB in figure 4.

 A device for erecting spray concrete support includes a spray concrete machine 1 mounted on a platform 2. On the platform 2, telescopic arms 4 are mounted on hinges 3, which are connected in the upper part to a cylinder 5 provided with nozzles 6. The cylinder 5 is provided with parallel channels 7.8. Nozzles 6 are connected to parallel channels 7.8, intersecting at an acute angle holes 9.10. The supply of the hardening mixture into the cylinder 5 is carried out through the concrete pipe 11, and air through the highway 12.

 A device for the construction of spray concrete lining works as follows.

 A platform 2 with a spray-concrete machine 1 installed on it is rolled into a mine in which it is necessary to fasten the roof and walls. Using telescopic manipulators 4, having a hinge connection 3 with the platform 2, the transfer mechanism (not shown), the cylinder 5 with nozzles 6 is brought to the work surface. The spray concrete machine along the concrete pipe 11 injects the sealed mixture into the channel 7 of the cylinder 5, from which it enters the nozzle 6. To give the necessary acceleration of the hardening mixture, air is supplied to the cylinder channel 8 through the air line 12, which is mixed with the hardening mixture in the intersecting openings 9, 10, is fed into the nozzle 6. The hardening mixture after exiting the nozzle 6 is applied to the surface to be treated. As a layer of the required thickness is deposited on the processing surface, the cylinder 5 with nozzles 6 is transferred around the circumference, processing the roof and the opposite wall of the mine.

 If the cross section of the mine has an irregular shape, telescopic manipulators provide the ability to maintain a constant distance from the nozzle to the workpiece. The strip width of the surface to be machined is determined by the length of the cylinder fixed between the telescopic manipulators. The supply of the hardening mixture and air into parallel channels, which are connected to each other through intersecting holes, allows for parallel operation of the nozzles.

 After the cycle of securing the excavation has ended, the spray-concrete installation is moved a step equal to the width of the strip of application of the hardening mixture, after which the cycle of securing the wall of the excavation is repeated.

 Analysis of the operation of the device for the erection of spray concrete support shows that the installation of telescopic manipulators on hinges attached to the platform allows you to quickly adjust the gap between the nozzles and the surface of the fixed workout.

 Moving the cylinder using actuators almost completely eliminates the time-consuming manual work when attaching mine workings. The installation of cylinders on two telescopic manipulators allows you to orient the nozzle at almost any angle with respect to the horizontal plane.

 The technical and economic analysis of the operation of the claimed device shows that, in comparison with the prototype, the effectiveness of securing the workings is improved by controlling the path of the nozzle and its angle of inclination depending on the cross-sectional profile of the working.

Claims (1)

 A device for erecting spray concrete support, comprising a spray concrete machine mounted on a platform, a manipulator with a nozzle system, a concrete conduit, an air supply line, characterized in that, in order to increase the efficiency of fixing the production of spray concrete due to the possibility of controlling the nozzle path depending on the transverse profile cross sections for working out and increasing the area of the surface to be worked out along the working length, the manipulator is made in the form of two telescopic racks pivotally attached the platform and interconnected by means of a cylinder, while the latter has two parallel channels, one of which is connected to the concrete path, and the other to the air line, and on the outer surface of the cylinder there are a number of nozzles, each of which is connected to parallel channels through openings intersecting between themselves at an acute angle.

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