RU2001200C1 - Method for reinforcement of rock slopes - Google Patents

Abstract

Use: strengthening the sides of quarries, slopes in the hydraulic and special construction. The goal is to increase the slope angles of quarries in a limiting position and reduce the cost of strengthening the slopes. SUMMARY OF THE INVENTION From the platform of the ledge, starting from the depths, there are approach adits one on two benches, from which excavations extend along the slope perimeter. Mining takes place in the zone of shifting the array ahead of the development of work on the ledge. Wells and additional wells are drilled from the workings. The wells are drilled to two ledges, and an edge layer is injected from them. Additional wells are drilled beyond the displacement boundary and at an angle to the displacement line a. Wells and additional wells, after installation in them with tension of the fastening ropes, are filled with 3 sludge setting mortar.

Description

The invention relates to mining and can be used to strengthen the sides of quarries, as well as slopes in hydraulic engineering and special construction.

A known method of reinforcing slopes 1. The method includes the preliminary conduct of underground mine workings on board the quarry behind the shift plane at each working horizon, drilling into a reinforced array of the indicated workings of wells and placing them in the last fasteners, followed by filling the wells with setting fluid. This method allows for the strengthening of the zone of influence of open pit mining prior to the commencement of development of work on each horizon of the quarry. For sinking, the method involves the construction of special inclined shafts.

Closest to the proposed method is a method of reinforcing the ledges in the quarries 2. The method is selected as a prototype. According to this method, when approaching the front of mining on the fixed ledge from the side of the slope, adits extend beyond the displacement zone. Wells are drilled from the adits to the surface, in the wells, fastening ropes are installed, which are discharged through the adit beyond the shear zone, tensioned and secured in adit locks.

The disadvantage of this method is the impossibility of anticipatory reinforcement of the ledge and the side of the quarry as a whole even before setting the ledges in the final position. Taking into account the significant length of the adits due to the long time of their penetration beyond the shift zone, the work to strengthen the slopes will lag behind mining at this working horizon of the quarry. This reduces the effectiveness of reinforcing slopes. The method requires significant costs for its implementation, since each adit extends beyond the displacement zone and its length is 2-3 times longer than the length of the area strengthened from the adit.

The aim of the invention is to increase the slope angles of the quarries at their ultimate position, as well as to reduce the cost of reinforcing the slopes.

The proposed method for strengthening rock slopes allows increasing the slope angle of the quarry, reducing the total length of underground mine workings to strengthen the slopes by 25-35%, abandoning the construction of shafts, and reducing the amount of overburden work.

This goal is achieved by the fact that in the known method, comprising conducting approach tunnels from the platforms of the ledges

drilling of wells from them, installation of fixing ropes in the wells, fixing of their ends with tension, filling of the wells with setting mortar, starting from depth N NDO, approach adits, one to two steps, from which perimeter excavations pass slope. These workings are carried out in the zone of shifting the array ahead of the development of work on the ledge. The boreholes from the workings drill to two benches, and the benches are strengthened before they are placed in their final position. In order to strengthen the surface of the ledges, before setting the fixing channels 15, the setting mortar is injected into the marginal slope layer. Then, additional wells are drilled towards the array beyond the displacement boundary at an angle to the displacement line of 90 °. Ends

20 fixing ropes in additional wells are fixed in their bottom hole.

In FIG. 1 shows a general scheme for reinforcing a slope; in FIG. 2 is a diagram of an arrangement of approach tunnels and

25 wells relative to the bottom, which draws up the final position of the ledge; in FIG. 3 is an example of rope attachment.

thirty

The method is carried out as follows.

Based on the parameters of the design contour of the steps 1 in the final position and information on the physicomechanical properties of the array, the position is determined

35 lines of movement of 2 rocks around the slope. The determination of the position of the displacement line includes calculating the depth from the surface at which the displacement occurs at an angle of 90 °. This depth in the technique has an index

40.

When mining operations approach the final contour of the excavation at a depth from the surface of the N NDO, after placing part of the ledge into the final position, approach adits 3, one on two ledges, pass from its lower platform. The adits are passed with a minimum cross-section, ensuring the operation of the tunneling equipment, the transport of the rock from the penetration and the supply required

50 amounts of air. Excavations pass from adits 3 along the perimeter of the steps 1 of the slope. Adits 3 extend to the minimum distance, ensuring that the workings 4 are outside the zone of the dangerous stress state of the array arising from the imposition of stress concentration zones near the step contour and the workout contour. Mines 4 are located in the displacement zone 5 of the array. As shown in FIG. 2, slaughter 6 workings 4 advance ahead

thirty

The method is carried out as follows.

Based on the parameters of the design contour of the steps 1 in the final position and information on the physicomechanical properties of the array, the position is determined

5 lines of movement of 2 rocks around the slope. The determination of the position of the line of movement includes calculating the depth from the surface at which the movement occurs at an angle of 90 °. This depth in the technique has an index

0.

When mining operations approach the final contour of the excavation at a depth from the surface of the N NDO, after placing part of the ledge into the final position, approach adits 3, one on two ledges, pass from its lower platform. The adits are passed with a minimum cross-section, ensuring the operation of the tunneling equipment, the transport of the rock from the penetration and the supply required

0 amount of air. Excavations pass from adits 3 along the perimeter of the steps 1 of the slope. Adits 3 extend to the minimum distance, ensuring that the workings 4 are outside the zone of the dangerous stress state of the array arising from the imposition of stress concentration zones at the step contour and the workout contour. Mines 4 are located in the displacement zone 5 of the array. As shown in FIG. 2, slaughter 6 workings 4 advance ahead

relative to the bottom of the mining operations 7, making the ledge into the final polo-kenio. From the workings 4 towards the lateral position of the ledge (Fig. 3), wells 8 are drilled with a gap to the design contour of the ledge 1 5 m, which corresponds to the depth of the rock softening zone after the explosion of the wells forming the ledge to the final position I (in areas of fractured and broken rocks near the ledge contour, before setting the fastening ropes about the wells 8, the setting solution 12 is injected onto the marginal slope layer. The injector is fed into the face Agin 8 with a drilling rig, and the gripping injecting solution is supplied to the injector via severe rods.D D drilled wells 8 install fixing ropes 9 Before installation, the ropes are degreased before taking care of the well, tighten them in the lock 14 and fill the wells with grasping solution Thanks to the lack of wells 8 to

the openings of the openings ensure the safety of the locks 11 after carrying out explosive operations with the aim of setting ledges R the end position of the well 8 is drilled from the workings A to two ledges and due to the lead ahead of the workings 4 in relation to mining operations, making the ledge to the final position, t advance reinforcement of both ledges As shown in FIG. 1 and 3, from the workings 4, additional wells 13 are drilled towards the array beyond the boundary of the shift at an angle to the shift line 2 and 90 °. In additional wells, fixing ropes 9 are installed with their ends secured with special locks 11 of known designs, for example, wedges, and then filled wells setting solution 10

(56) USSR Copyright Certificate No. 812922, class E 21 C 41/00, E 02 D 17/20, 1981

USSR copyright certificate No. 840360, class E 21 C 41/00, 1981

Claims (1)

The claims METHOD OF UKRGPLRNII SKLLN1Y OTTOLOR including conducting access tunnels from the ledge sites, drilling wells from them, installing fastening ropes in the wells, securing their ends with tension, filling the wells with a cooling solution, characterized in that, in order to increase the slope angles of the quarries in the limiting position and reduce the cost of strengthening the slopes, from depth I and 90, approach tunnels pass one on two ledges, from which perimeter excavations pass of the slope, and the workings take place in the zone of the massif shift ahead of the development of work on the ledge, and the wells are drilled to two ledges, the setting mortar is injected into the edge the slope layer and the advanced strengthening of the ledges before placing them in the final position, then additional wells are drilled towards the array beyond the boundary of the shift at an angle to the shift line from 90 and fixed the ends of the fixing ropes in additional wells; jut in their slaughter 2001200 12 Fig.Z