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    (1) Ore body occurrence conditions and terrain conditions are complex;
    (2) There are many varieties of ore, which need to be divided into mining and transportation;
    (3) The ore transport distance is less than 3000m.
    2 of the following circumstances, can be used to develop standard gauge railway transport solutions:
    (1) The direction of the long axis of the open pit is greater than 1000m, the slope is more regular, and the total annual stripping is greater than 20,000kt;
    (2) The dumping distance of the dumping site is more than 5000m, the specific height or the depth of mining is less than 200m, and the railway wiring is suitable between the stope to the dumping site and the plant;
    (3) The total exit and exit of the stope is open and wide, and the railway marshalling station can be arranged.
    3 The hillside open pit mine with high height difference, complicated terrain and good rock stratum engineering and geological conditions can be developed by highway-leveling.
    4 When using the highway-flat raft to jointly develop the transportation plan, it is better to arrange the sloping well in the mining site; but when there is an empty space in the stope or the ore conditions in the stope are not suitable for arranging the chute, the chute can be placed in the stope. The entrance and exit is near the mouth. When the ore needs to be broken, the crusher should be located at the slip hole. When a semi-mobile crushing station is installed at the slipway in the stope, the service life of the crusher should be more than 5a, and two sets of chute facilities should be interchanged.
    5 When the annual rock mass is more than 3000 kt and the vehicle transportation distance is more than 3000 m, it is advisable to use mobile crushing station-belt conveyor to develop transportation plan or road-semi-mobile or fixed crushing station-belt conveyor joint development transportation plan. .
    6 The road-crusher-belt conveyor will be used to jointly develop the transportation plan. The conveying capacity of the belt conveyor should be compatible with the capacity of the feeding equipment such as the crushing station and the feeder. The fixed belt conveyor in the stope should be placed on the non-worker. If the conditions are not allowed, it can be placed in the inclined shaft. When the conditions are met, the large angle belt conveyor should be used. The belt conveyor design shall comply with the relevant provisions of Section 15.3 of this code.
    7 The total entrance and exit position of the deep open pit mine shall be determined according to the relative position, elevation and topography of the dumping site and the industrial site. If necessary, technical and economic comparison shall be carried out; for large deep open pit mines, two entrances and exits shall be provided.
    8 The grade of open pit mine roads should meet the requirements of Table 1.
Table 1 Road grade Road grade Single line driving density (vehicle / h) Driving speed (km/h) Applicable conditions one >85 40 Production trunk two 85~25 30 Production trunk line, branch line three <25 20 Production of trunk lines, feeder lines and tie lines Mine road grade one two three No ultra-high minimum circle radius 45 25 15 Mine road grade one two three Minimum circle radius 45 25 15
    Note: The minimum circular curve radius of the articulated car road can be designed as 10m.
Table 10 Maximum longitudinal slope (%) Road grade one two three Maximum longitudinal slope 8 9 10
    Note:
    1 The maximum longitudinal slope of an articulated car road should not exceed 15%.
    2 The maximum longitudinal slope of the bottommost stage of the deep open pit mine can be increased by 1%.
    3 In the downhill section of the heavy truck, the maximum longitudinal slope should be reduced by 1%.
    11 The length of the longitudinal slope of open pit mines shall be in accordance with the provisions of Table 7.4.11-1. When the length of the longitudinal slope exceeds the requirements of Table 11-1, it shall be set at a length not greater than the length specified in Table 7.4.11-1. For slopes with a slope of not more than 3%, the minimum length of the gentle slope shall not be less than that specified in Table 11-2.
Table 11-1 Longitudinal slope limit of open pit mines (m)
    Note: When the terrain conditions are limited or need to be adapted to the mining step elevation, the limit slope length may be a large value. Slope slope (%) Road grade one two three 4~5 700 - - 5~6 500 600 - 6~7 300 400 500 7~8 200 250 or 300 350 or 400 8~9 - 150 or 170 200 or 250 9 to 10 - - 100 or 150
Table 11-2 Ease the length of the slope (m)
    12 The pavement width of open pit mines should meet the requirements of Table 12-1; the shoulder width of open pit mines should meet the requirements of Table 12-2. Road grade one two three Mitigation of the minimum length of the slope 80 60 40
    Table 7.4.12-1 Ground Pavement Width of Open Pit Mine
    Note: When the difference between the actual vehicle width and the calculated vehicle width is greater than 15cm, the design width of the road surface should be adjusted according to the interpolation method with 0.5m as the unit of widening. Truck category one two three four Fives six Seven Eight nine ten Calculate the vehicle width (m) 2.3 2.5 3.0 3.5 4.0 5.0 5.5 6 7 7.5 Two-lane road
Width (m) First level 7.0 9.0 11.0 12.0 14.5 18.0 20 24.0 28.0 30.0 Secondary 6.5 8.5 10.5 11.5 13.5 16.0 18.0 22.0 26.5 28.5 Third level 6.0 8.0 10.0 11.0 12.5 14.0 16.0 20.0 25.0 27.0 Single lane pavement
Width (m) First, second 4.0 5.0 6.5 7.0 8.0 9.0 10.0 12.5 15.0 16.0 Third level 3.5 4.5 6.0 6.5 7.5 8.5 9.5 12.0 14.0 15.0
Table 12-2 Open shoulder mine road shoulder width Car width category One or two three Four or five Six or seven Eight ninety Shoulder width
(m) Excavation section 0.50 0.75 0.75 1.00 1.00 1.50 Filling lot 1.00 1.50 2.00 2.50 3.00 5.00
    13 The width of the transport platform in the stope shall be the sum of the road surface and shoulder width of the open pit mine.
    14 The choice of road pavement materials should meet the following requirements:
    (1) For the production of trunk lines and permanent tie line roads, mud gravel roads should be selected;
    (2) The production branch line of the mining and dumping working face and the temporary tie line road, the pavement material should be taken locally.
    15 For open-pit mine roads, safety warning signs must be set in sharp bends, steep slopes, and dangerous sections; corners of hillside fills, fill sections with large slopes, and outside of high-rise roadbeds and high-slope sections must be provided with safety barriers The height of the safety barrier should not be less than 0.4 times the diameter of the wheel.
    16 In areas with high traffic density, the traffic density should be verified. The vehicle interval shall be calculated according to the braking distance plus a safety interval of 10m to 20m.
Mine development transport design specification
    1 In one of the following situations, it is advisable to use a single road to develop a car transport plan:     10 The maximum longitudinal slope of open-pit mine transport roads should not exceed the requirements of Table 7.4.10.
   9 Open-pit mine roads, when the design speed is greater than 15km/h and the radius of the circular curve used is less than the requirements of Table 2-1, the super-high setting should be set on the circular curve according to the relevant provisions of the current national standard “Code for Design of Mines and Mines†GBJ22. When the radius of the circular curve is equal to or less than 200m, the road surface shall be widened on the inner side of the circular curve according to the relevant provisions of the current national standard "Code for Design of Mines and Mines" GBJ22; the radius of the minimum circular curve of open-pit mine roads shall comply with Table 2-2. Provisions.
Table 2-1 Minimum radius curve (m) without super high
Table 2-2 Minimum circle curve radius ( m)