Therefore, according to local conditions, the hanging height should be as high as possible in principle, preferably not lower than 1 .8m. Of course, the conditions are limited, even if the lifting height is1m, it is possible. Master a principle that cables should not be hit by water and cars, so as to reduce the possibility of these hidden dangers.
Relevant clauses of "Coal Mine Safety Regulations":
Article 469 A cable shall not be hung on an air duct or water pipe, and shall not be wet by water. It is forbidden to hang anything on the cable. When the cable is laid on the same side of the roadway as the wind pressure pipe and water supply pipe, it must be laid above the pipeline and keep a distance of more than 0.3m In the roadway with gas drainage pipeline, cables (including communication and signal cables) must be hung on both sides of the roadway with gas drainage pipeline respectively. Coils or 8-shaped cables shall not be energized, but cables supplying power to mining and excavation units are not subject to this restriction.
The communication and signal cables in the shaft and roadway should be suspended separately from the power cables on both sides of the shaft and roadway. If the conditions are limited, it should be laid in the well at a distance of 0.3m from the power cable. In the roadway, it should be laid 0. 1m above the power cable.
When the high and low voltage power cables are laid on the same side of the roadway, the distance between the high and low voltage cables should be greater than 0.1m. The distance between high voltage cable and low voltage cable shall not be less than 50 mm.
For cables in underground tunnels, signs of number, purpose, voltage and section shall be set at regular intervals at bends or branch points along the line, at both ends of junction boxes connecting cables with different diameters, and at both sides of walls of wall-penetrating cables.
Twenty-second transport lanes on both sides (including pipelines, wires and cables) and the distance between the most prominent part of transport equipment, should meet the following requirements:
(1) A sidewalk with a width greater than 0.8m (1m for the comprehensive mechanized coal mining mine) must be left at one side of the newly-dug transportation lane in the newly-built mine and production mine, and the pipe suspension height shall not be less than1.6m; The width of the other side of the roadway shall not be less than 0.3m (0.5m for the comprehensive mechanized coal mining mine). When installing the conveyor in the roadway, the distance between the conveyor and the roadway support shall not be less than 0.5m；; The distance between the conveyor head and tail and the roadway support should meet the needs of equipment inspection and maintenance, and should not be less than 0.7m. The most prominent part of fully mechanized mining equipment in the mobile substation or flat car in the roadway should be at least 0.3m away from the roadway support.
(2) When the width of the existing roadway sidewalk in a production mine is less than the requirements in Item (1) of the first paragraph of this article, an escape adit must be set on one side of the roadway, and the distance between two escape adits shall not exceed 40m. The width, depth and height of the escape adit shall not be less than1.7m. It is forbidden to accumulate materials in the escape adit.
(3) On the upper and lower sides of the driveway where people and cars park, within the height range of 1.6m from the roadway ballast surface, sidewalks with a width greater than 1m must be left, and the height of hanging pipes shall not be less than1.8m. ..
Article 468 the laying of cables (except cables connecting handheld or mobile devices) shall comply with the following provisions:
(a) The cable must be suspended:
1. In a horizontal roadway or a shaft with an inclination below 30, the cable should be hung by a hook;
2. In a vertical shaft or a shaft with an inclination of 30 or more, cable clamps, clamps or other clamping devices should be used for cable laying. The clamping device should be able to bear the weight of the cable without damaging the cable.
(two) the cable hanging in the horizontal roadway or inclined roadway should have appropriate sag, and can fall freely when it is accidentally stressed. Its hanging height should ensure that the cable will not be hit when the car falls off the road, and the cable will not fall on the track or conveyor when it falls.
(3) The spacing of cable suspension points shall not exceed 3m in horizontal roadway or inclined shaft and 6m in vertical shaft.
(4) The cable laid along the borehole must be tied to the wire rope, and the borehole must be equipped with pipes.
Transcribe an underground cable suspension standard for your reference.
1, general standard
(1) power cables and communication signal cables shall be hung by classification, and the communication signal cables shall be hung above the power cables with a spacing greater than100 mm; ; The distance between the signal cable and the power cable should not be less than 50 mm,
The cable hook spacing is 1.5m, and the hanging height is not less than1.5m from the bottom plate;
(2) The cable at the intersection of the roadway should be laid vertically along the roadway, bent into an arc at the shoulder socket of the roadway, and then hung to the designated position of the roadway.
(3) A single communication signal cable should be tied with a plastic head at the top, and a buckle should be tied every 0.5m. ..
(4) When multiple cables pass from one side of the roadway to the other, the cables should be laid along the roof of the roadway, and the cable direction should be perpendicular to the direction of the roadway. Special cable clamps (see attached figure) should be used for cable fixation, and the spacing should not be more than 0.6m. ..
(5) The cable bends downward after leaving the switch and junction box, which is more than 50mm below the bell mouth, and the bending radians of the cables on both sides are naturally consistent.
(6) The outgoing lines of four small appliances on the small winch console must ensure the outgoing radian.
(7) The socket of the four small appliances must ensure that the center line of the four small appliances is more than 50mm higher than the cables on both sides.
(8) The cable allowance at both ends of the high-voltage junction box must be greater than 500mm, and the junction box should be in the same direction as the roadway, fixed on the panel with a cable hook or a fixed frame, with a distance of 1.5m from the roadway floor, and grounded according to the standard.
(9) The cable allowance at both ends of the low-voltage junction box must be greater than 300mm, the four-way must be covered outwards, and the small bell mouth is fixed on the roadway side with expansion bolts.
(10) The bending parts of cables at both ends of the junction box are fixed with the free direction of cables, and the height from the roadway floor is not less than1.5m. Forced bending is strictly prohibited. When encountering feng shui pipes, they must be separated by more than 300 mm.
(12) Hanging cable signboard: The cable signboard must have uniform specifications, and the contents on the signboard include the management unit, specification, model, length and purpose of the cable; Hanging position: Cable signs should be hung at the cable diameter changing position, the outlet end of the junction box, the cable bend and the bifurcation. In the mining roadway, in principle, a cable signboard should be hung every 100 meters along the cable direction. When it is less than 100 meters, at least one cable signboard shall be hung. In alleys and other tunnels where cables pass, hang a cable sign every 200 meters.
(13) It is forbidden to coil cables when hanging, and it is forbidden to coil cables (including cables coiled in "∽") to run live, except cables on coal cutters.
(14) The cable and cable suspension spacing at the head, fork and corner can be appropriately reduced and smooth, so as to be neat and beautiful.
(15) Underground cables should be kept clean, and relevant responsible units should scrub them regularly.
2, alleys, shek mun and main transportation inclined lane permanent cable hanging standard
(1) The cables laid in alleys, intersections and main transportation inclined lanes shall be suspended by permanent cable hooks.
(2) The cable direction of alleys and stone gates is parallel to the waist line, the cable hook is perpendicular to the waist line, and the plane formed by the cable hook is parallel to the side of alleys. The spacing of cable hooks shall not exceed 1.5m, the spacing of hooks shall be uniform, and the cable suspension height shall not be less than1.5m. ..
(3) The cable direction of the main transportation inclined lane is parallel to the waist line, and the cable suspension height is not less than 1.5m from the ground. The plane formed by the cable hook is parallel to the side of the road. The distance between cable hooks shall not exceed 1.5m, and the hook spacing shall be uniform.
(3) The production of cable hooks in alleys shall be made by the mechanical and electrical department according to the number of communication signal cables of power cables, and a certain spare cable trench shall be reserved for drawing, which shall be processed by the machine factory after the approval of the vice president of mechanical and electrical, and the mechanical and electrical department shall be responsible for the installation and hanging.
(4) Cable hooks in inclined lanes shall be made by the transportation department according to the number of communication signal cables of power cables, and a certain spare cable trench shall be reserved for traction. After the approval of the vice president of mechanical and electrical engineering, the machine factory is responsible for the installation and hanging of cable hooks.
3, coal roadway two cable hanging standard
(1) Two cables in coal roadway are hung with polyethylene cable hooks.
(2) The cable hook shall be hung with 2 "steel wire rope or 8# steel wire, and the steel wire rope (steel wire) shall not be less than 60 Milla at a time, and shall be tightened with flower pole screws.
(3) Use polyethylene cable hooks to hang communication signal cables with specifications of 20; Hanging 4mm2 cable, size 28; Hang 6- 10mm2 cable, size 38; Suspension 16mm2, 25mm2 and 35mm cables, specifications 48 and 50; Suspend 50mm2 and 70mm2 cables with specifications of 68; Cable No.80, with suspension capacity exceeding 95mm2. The spacing between cable hooks is 1.5m, and it is fixed on the taut wire rope or 8# steel wire with 14# iron wire. Twist the fixed wire twice, and cut the thread short and twist it to help.
(4) Head-on and some places hang single strings with iron wire, and then tie them with plastic instead of iron.
4, rock lane cable hanging standard
(1) The power cable, communication cable and signal cable in the roadway shall be welded cable hooks; The surface of the cable hook should be painted apricot yellow. The cable hook shall be fixed on the lane side with a distance of 1.5m, and the cable shall be suspended parallel to the bottom edge to form a straight line after suspension.
(2) When multiple small cables are led out from the head-on junction box, they should be tied horizontally and vertically with plastic heads.