Method of strengthening the slopes of the scarp

 

The invention relates to the mining industry and can be used for open development of mineral deposits. The technical result is to increase the safety of operations during the shipment of rock and manufacture of military operations and increased stability margin strengthened ledge. The method includes drilling on the upper and lower sites of the ledge, laying the rope on the slope, the anchorage of the ends of the ropes in the wells, the tension of the ropes. In addition produce strengthening podustov, to which the ends of the ropes while strengthening podustov angeraut in wells drilled on the top floor of the ledge and slope of the ledge with the lower areas of podustov. 5 C.p. f-crystals, 1 tab., 4 Il.

The invention relates to the mining industry and can be used to open the development of the mineral Deposit.

There is a method of strengthening the slopes of the scarp, which includes the drilling of wells on the upper and lower sites of the ledge, laying of cables, fixing them to all wells and the tension of the ropes, and wells on the upper and lower sites of the Buryats in a checkerboard pattern, and each hole connecting cables with two adjacent with the conditions of work in the strengthening of the slope, installation of ropes is performed after complete exposure of the slope that leads to its deformation before the end of the fastening work.

The closest in technical essence and the achieved result is a way to strengthen slopes, including the drilling of wells in the upper and lower areas of the ledge, laying ropes anchored ends and the tension [2 - prototype].

The disadvantage of this method is lack of security operations during the exposure of the slope when the shipment of rock and manufacture of fastening work.

The invention allows to achieve a technical result, expressed in improve safety and increase slope stability.

This technical result is achieved by the fact that in the known method of strengthening the slopes of the scarp, which includes the drilling of wells on the upper and lower sites of the ledge, laying the rope on the slope, the anchorage of the ends of the ropes in the wells and the tension, additionally produce strengthening podustov, to which the ends of the ropes while strengthening podustov angeraut in wells drilled on the top floor of the ledge and slope of the ledge with the lower areas of podustov, and the subsequent strengthening of podustov ropes have sub>p,

where Npand Hyheight pedostop and strengthen ledge accordingly, the height of pedostop determine the known methods depending on the physico-mechanical properties of rocks and factor stability, guaranteeing a steady state pedostop, the length of the wells drilled from the lower areas of podustov, and accordingly the length of the ends of the ropes are taking this to the anchor, for example concrete, crossed the potential sliding surface of the ledge; the tension produced in pairs while strengthening each pedostop by known methods, for example, a mechanical gripper.

New features in the proposed method:

- blasted rock mass of the ship podstupeni, with the lower areas where drilling of wells, installed and concreted them in the lower ends of the ropes;

the number of podustov determined by the dependencies;

- fastening produce consistently for each pedostop;

- drilling of pedostop and the reinforcement of their ropes made thus to anchor, for example concrete, crossed the potential surface of sliding ledge;

the height of pedostop determined depending on the physical-mechanical Innego way:

- improving the safety of operations during the shipment of rock and the mount of the slope, because the shipment of rock and work on strengthening the first pedoscope is when the stability margin, preventing deformation of pedostop, and on the following approaches when fortified previous;

- most additional retention efforts in the application of the proposed method gets the upper part of the ledge (prism active pressure) which is most prone to deformation, thus increasing stability margin of the ledge.

In Fig.1 depicts a plan to strengthen the plot of Fig.2 - section a-a in Fig.1; Fig.3 - section b-B in Fig.1; Fig.4 - section b-b of Fig.1.

The method is as follows.

Drilling of wells for charge cutting slits 1 and charges loosening 2, charge wells of EXPLOSIVES and blow up the borehole charges.

Determine the height of podustov by known formulas depending on the physico-mechanical characteristics and values of the stability margin, guarantee their stable condition.

The number of podustov determined by the formula:

N=Hy/Hp,

where Npand Hy- height pedostop and strengthen ledge respectively. On the top floor strengthening of the ledge is the mass of the first pedostop 7 and the lower platform 8 drilling of wells 9 in slope, install them in the lower ends 10 of the ropes 6, concreted them, and well equipped so that the anchor, for example concrete, crossed the potential sliding surface 11 when the deformation of the ledge, produce tension in a known manner, for example mechanical gripper 12. Then ship the rock mass of the second pedostop 13 and the lower platform 14 drilling of wells 15, in which are mounted the lower ends of the ropes 16 and the upper set in well 4 on the top floor of strengthening the ledge, concreted wells 4 and 15 and produce the tension.

If there are more than two podustov for each of them produce similar operations.

Order full disclosure of technical nature and advantages of the present invention shows an example where we have adopted the following similar data: rocks rock intensely fractured, clutch - 15 t/m2the angle of internal friction - 26density of 2.5 t/m3the scarp - 36 m, the angle of the ledge 65.

On the well-known formulas [3] assess the stability of the slopes of different height, the results are shown in the table.

Taken high the charges for loosening, well for concreting of the ends of the ropes. Well cutting the slots and hole for charges loosening charge of EXPLOSIVES and blow up the borehole charges. Concreted the upper ends of the ropes in the wells. Ship rock mass first pedostop and transported it, for example, by the time Congress (not shown) or shoveled on the lower area of the ledge, then shipped together with the mountain mass of the second pedostop. On the lower ground first pedostop drilling of wells in the slope of the ledge, installed and concreted them in the lower ends of the ropes first pedostop, produce tension, for example a mechanical gripper.

Ship mountain mass of the second pedostop and the lower pad drilling of wells in the slope of the ledge, in which are mounted the lower ends of the ropes of the second pedostop, and the upper ends are installed in the well at the top of the ledge, concreted well and produce tension.

Execution of works on the shipment of rock and manufacture of fastening the first pedostop produce when the stability margin of 2.0, which guarantees a steady state pedostop.

Execution of works on the shipment of rock and manufacture of fastening of the second podium steady state bench during his short standing. The strengthening of the second pedostop increases the stability margin of the ledge from 1.6 to 2.0, which guarantees a steady state bench during prolonged standing [3].

Thus, izlojennye information indicate that the claimed method can be used in the mining industry while strengthening the slopes of the scarp. Therefore, the claimed invention meets the condition of "industrial applicability".

When applying the proposed method eliminated the shortcomings of the existing solutions and provide new positive properties: increasing safety during the manufacture of the fastening works on the slopes of the scarp, the increase slope stability of the slopes.

Analysis of the known solutions showed that the essence of the proposed solutions are not disclosed, the proposed method is characterized by a new set of features that allows you to read it meet the criteria of "novelty" and "inventive step".

Sources of information

1. USSR author's certificate No. 626203, IPC E 21 41/02, 1978.

2. USSR author's certificate No. 535390, E 02 D 3/08, 1976.

3. Guidelines for the determination of the angle of inclination of the sides of slopes and stockpiles of building and operating quarries. HP: VNIMI, 1972, S. 14.

Fo is osadca ledge, laying the rope on the slope, the anchorage of the ends of the ropes in the wells, the tension, characterized in that it additionally produce strengthening podustov, to which the ends of the ropes while strengthening podustov angeraut in wells drilled on the top floor of the ledge and slope of the ledge with the lower areas of podustov.

2. The method according to p. 1, characterized in that during the subsequent strengthening of podustov ropes feature between the ropes, reinforcing previous pedoscope.

3. The method according to p. 1, characterized in that the number of podustov determined by the formula

N=Hy/Hp,

where Hpand Hyheight pedostop and strengthen ledge respectively.

4. The method according to p. 1, characterized in that the height of pedostop determined depending on the physical-mechanical characteristics of the rocks in the stability margin, guarantee sustainable state.

5. The method according to p. 1, characterized in that the drilling of podustov, the reinforcement of their ropes, followed by cementation produced so that the anchor, for example, reinforced concrete, crossed the potential surface of sliding ledge.

6. The method according to p. 1, characterized in that the tension produced in pairs while strengthening each pedostop.

 

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FIELD: building, particularly hydraulic structure reinforcement.

SUBSTANCE: method is performed in two-stages. The first stage involves forming vertical elongated flat ground massifs secured by hardening material. Massifs are created in crest embankment area and in upper area of embankment slope so that massifs are spaced minimal available distance from crest and pass through embankment body, including land-sliding upper embankment slope area. Massifs are anchored in mineral bottom by lower edges thereof and are arranged at least in three rows and there are at least three massifs in each row. Method for massifs forming involves driving double-slotted injectors directly in embankment ground or in wells formed in embankment and having plugged wellhead; orienting injector slots perpendicular to hydraulic pressure head vector direction in embankment area to be reinforced; injecting hardening material under increased pressure across horizons from top to bottom or in reverse direction, wherein injection is initially performed under 5-15 atm pressure and at minimal rate in each second injector of one outermost row beginning from extreme ones; feeding hardening material in previously missed injectors in this row; supplying injectors of another extreme row with hardening material in the same way; feeding hardening material to ejectors of medium rows under 10-20 atm pressure; performing the second reinforcement stage as material hardens to obtain 70% strength. The second reinforcement stage involves forming vertical elongated flat massifs of secured ground anchored in mineral bottom by lower edges thereof and arranged at least in three rows, wherein each one includes at least three massifs. Massifs extend at the angle exceeding embankment slope angle to horizontal line. Massifs are formed with the use of double-slotted injectors in remainder embankment area. Injector slots are directed perpendicular to hydraulic pressure head vector direction in embankment area to be reinforced. Hardening material is ejected in above succession, wherein hardening material pressure is equal to design process pressure enough for direction of feeding hardening material through injector slots and lesser than hardening material injection pressure of the first reinforcement stage.

EFFECT: increased reliability of structure reinforcement; prevention of land-slide on structure slopes.

3 cl, 3 dwg

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