SU1265331A1 - Trasportation slope of open mine - Google Patents

Abstract

TRANSPORT ACCESS CAREER, including a ramp, transport and safety berm, a protective wall, characterized in that. that, in order to increase traffic safety and reduce the autopsy during the formation of the ledge, the protective wall is made of sections with upper, intermediate upper and lower inclined and vertical planes, each section of the protective wall being equal to the length of the exit, which overlaps the safety bar of each of the overlying ledge and fixed by means of anchors in the wells, while the upper plane of the wall is made at an angle of 30-35 to the horizon and is covered with reflective paint, and the intermediate upper and i lower plane formed with hooded A prefecture 70-80 and 50-60, respectively, the height of the vertical plane of the wall on the level of security to the berm, the intermediate lower inclined plane is equal to the maximum thickness seasonal snow.

Description

The invention relates to mining and can be used in the formation of motor berms of ledges of quarries.

The purpose of the invention is to increase traffic safety and reduce the opening when deforming the pit ledges,

The drawing shows the section of the pit wall protective wall, section,

The transport ledge of the pit contains a exit, transport TB and safety berm, protective reinforced concrete sectional wall 1 with a base width of 1.5-2.5 m and a height of 1.7-2.0 m. The width and height of the wall depend on the model used technological vehicles, carrying capacity from 75 to 180 tons.

At a distance equal to the sum of the safety distance from the edge of the ledge to the bottom of the wall and half the width of the wall at the base, a hole is drilled with a diameter of 0.2АЗ m at a depth of 2.53, 0 m with a distance between them of 1.21, 8 m the drilled wells are installed metal anchors 2 with an outer diameter of 0.15-0.2 m with a wall thickness of at least 4-5 mm (with less than 4-5 mm the anchor is cut off when the dump truck runs at maximum speed), concretes the free space between the anchors and the walls of the wells 3, the cavity of the anchor pipe is filled with rubble trifle.

The anchors fastened in this way are fastened in the stressed state by welding or clamps of cables 3 with a diameter of 39 mm through 0.35 m along the height of the anchor. The assembly of the working reinforcement 4 is carried out, after which the rest of the assembly reinforcement 5 is installed, ensuring the design position of the operating reinforcement and a more uniform distribution of forces between the individual rods of the operating reinforcement. A formwork is then installed to preserve the transverse profile of the metal skeleton of the wall section, and concreting is carried out.

The upper cavity-6 of the wall section is made at an angle of 30-35 to the horizon and is painted with a zebra pattern with reflective paint, which increases the signaling functions by increasing the number of rays reflected by the plane and directed to the driver’s acute vision zone.

The lower vertical part 7 of the wall section, from the level of the motor berm to the lower sliding plane in height, is equal to the maximum thickness of the rolled snow cover, depending on the climatic zones necessary to maintain active

wall height in winter.

The promezochnaya lower glide plane 8 is inclined to the horizon at an angle of 50-60, and the intermediate upper glide plane 9 is angled at an angle of 70-80 °.

When the trucks move along transport ledges, wall collisions are possible, and the truck’s preliminary contact occurs with the vertical plane of the protective wall, partly extinguishing the impact energy. Further, the wheel moves along the lower intermediate slip plane with a high coefficient of friction between the dump truck tires and the slip plane roughness. , lifts auto dump and due to this absorbs the main energy of the collision. Then, get on

upper intermediate plane

gliding also with a large friction coefficient, the wheel temporarily moves along the wall at a constant level, extinguishing the rest of the collision energy, respectively.

Going down the lower intermediate plane of the slide and the vertical plane, having changed the trajectory of movement, it continues to move along the carriageway of the ledge,

The fastening of the concrete wall on the anchors creates a robust rigid structure that is not capable of collapsing when the vehicle hits the maximum speed. Deepening

anchors of 2.5–3.0 m provide resistance to momentum overturning. With a burial of less than 2.5 m, the opposing resistance to tipping is less than the moment of picking up in the event of a dump truck hitting the wall. With the deepening of more than 3.0 m, there is an unreasonable overrun of the anchors, i.e. significant appreciation of the wall, and

The distance between the anchors of 1.2-1.8 m provides a counter-resistance to the cut-off of the anchors when the dump trucks hit the wall. With

3

the distance between the anchors smaller than 1.2 m results in excessive consumption of the metal, which leads to an increase in the cost of the wall; with more than 1.8 m, the condition against cutting is not achieved.

The upper wall plane, made at an angle of 30-35 to the horizon in the direction of the carriageway with reflective paint applied to it, reflects most of the rays to the driver’s acute vision zone, signaling that they are approaching a dangerous section of the road. The angle of inclination of the upper plane 30-35 makes it possible to increase the signaling functions by increasing the number of reflected rays directed into the driver’s acute vision zone, which determines the sector of the required visibility. When the angle of inclination of the upper plane is less than 30, the main number of reflected rays is directed above the zone of the driver’s acute vision. When the angle of inclination is greater than 35, the main number of reflected rays is directed below the driver’s acute vision zone. The wall is made in sections of a length equal to the length of the exit, forming gaps for rides on the berms and snow dropping when cleaning the carriageway in winter. The width of the wall at 1.5 m corresponds to the transport step for the operation of open pit trucks with a lifting capacity of 75 tons, and 2.5 tons with a carrying capacity of 180 tons.

In order to increase traffic safety of vehicles, vehicles, and vehicles when passing horizontal platforms located between exits, a protective steak covers a horizontal platform along the edge of each upper ledge for a length of 1.3-1.5 m. With a length of less than 1.3 m, frontal hitting is possible on the end of the wall with a large damage to the dump truck and a minimal driverlessness / with a length of more than 1.5 m

justifiably increases the cost of the transport ledge career.

The lower plane of the wall slant is inclined to the horizon at an angle of 505 60, providing the necessary width of the cross section, and the upper plane of sliding at an angle of 7080, which provides the necessary wall width at the level of application of a shock load when hitting vehicles.

When the lower plane is inclined less than 50, the width of the transition section, formed by the intersection of the lower and

15 upper slip planes,

decreases and when the dump truck is harnessed with a maximum speed on the wall, the latter is cut off in the transition section. When tilting more than 60 °, the wall dimensions across the width of the cross section increase, as well as the consumption of metal and concrete, which leads to a significant increase in costs. When tilting the top plane

5 less than 70, the width of the cross section is reduced at the level of application of a shock load during a collision, which leads to a cross-section of the wall in this section; when tilted more than 80 due to the increase

0, the cross-sectional area of the wall with the consumption of metal and concrete significantly increases the cost of building the wall.

In addition, the upper and

the lower limits of the inclination of the slip planes are given in accordance with the transition section of the wall.

The height of the vertical plane of the wall from the level of the road

 The berms to the glide plane are necessary so that in winter the thickness of the snow cover does not reach the glide plane.

The width of the ledge at 2.0-8.0 m, gives

, an opportunity to increase the width of the carriageway and reduce overburden volumes and costs for overburden.

Claims (1)

A CAREER TRANSPORT ACCESS, including a ramp, a transport and safety berm, a protective wall, characterized in that, in order to improve traffic safety and reduce overburden volume when forming a step, the protective wall is made of sections with upper, intermediate upper and lower inclined and vertical planes, moreover, each section of the protective wall is made equal to the length of the ramp, overlaps the safety berm of each overlying ledge and is fixed by means of anchors in the wells, while the upper plane the wall is made at an angle of 30-35 to the horizon and is covered with reflective paint, and the intermediate upper and lower planes are made with an inclination of 70-80 ° and 50-60, respectively, the height of the vertical plane of the wall from the level of the security berm to the intermediate lower inclined plane is equal to the maximum seasonal thickness of snow cover.