Method of study the stability of the dumps

 

The invention relates to mining and can be used to study the stability of embankments rocks. The method consists in the fact that prior to stockpiling at its base mounted anchor system of the four pillars and beams stiffness, installed perpendicular to the racks with the possibility of vertical movement thereon. To the first pair of beams with both ends mounted vertical stops with the struts and the load device, and set the truck with the load devices. To the second pair of beams with both ends mounted load device under different values of the angle to beams or angle of inclination to the horizontal plane. In the place of installation of vertical lugs smooth out horizontal platform, framing prism of rock dump. On the prism top wear metal sleeve, set the stamps and the load device from the top and sides to create compressive and shear forces. By means of loading devices transmit the load on the breed of the blade and make the necessary measurements of the parameters of the displacements of rocks and related efforts, created a load device, after which the obtained experimental data will determine the strength of palov. 5 Il.

The invention relates to mining and can be used to study the stability of embankments rock - external and internal piles.

There is a method to study the stability of the slopes of the dumps and loaded dump ledges, consisting of layer-by-layer stacking of the equivalent material in the stand, strengthening across the width of the model strung with steel strings, the rotation of the entire model around its transverse axis, the measurement of the coordinates of individual points obtained sliding surface slope (Panyukov b.p., Rzhevsky centuries, Istomin C. C., Halpern, A. M. Geomechanics dumping in open pits. - M.: Nedra, 1972, 182 S., S. 125). The limitation of this method is to simulate overburden equivalent materials and the complexity of modeling real-world load from mining and transport equipment, which distorts the real picture of the deformation of the blade and reduces the reliability of the information received.

Closest to the proposed method is a method of study the stability of the piles, which consists in filling in the manufacturing conditions experienced dumps with exposure to the load devices and the determination of the parameters of stable, is the way the prototype to solve the following tasks:

- determination of the critical parameters, which can occur deformation of the blade - the edge of the slope, the height of the blade, the width of the berms, the number of tiers;

- identification of the actual contours of undisturbed slopes dumps at various mining equipment;

- determination of strength characteristics of rock dump.

To solve the first and second tasks required at the top and dump the ledges to create the load, the magnitude and nature of the transmission which would be consistent with applicable mining and transport equipment. With this method of study the stability of the dumps it is impossible to create a load of critical magnitude with the use of actual mining and transport equipment, as it is associated with the safety production work, namely the collapse of the slopes of the dumps. For this reason, it is impossible to identify one experienced dump the effectiveness of measures to enhance the resilience of the blade, for example the introduction of reinforcing elements. Thus, in the method according to the prototype, the problem of determining the optimal parameters of the blade, corresponding to a wide range of loads from mining and transport are equipped with the ACI prototype - determine reliable strength characteristics dump rock it is necessary to conduct field tests of rocks. Used for this installation shift and collapse of rock undisturbed addition suggest the presence of fixed stops in both the horizontal and vertical planes.

The limitations of the method according to the prototype is that when you test dump rock on shift, especially vegeatrian, there are problems with the transmission on these rocks compressive and shear loads, as well as with reliable registration of deformation due to the significant deformability of rocks in periodonal zone. This is due to the difficulty and sometimes impossibility of organizing the fixed stops to dump loose rocks, especially in the middle and upper part of the blade. This method on the prototype of the very complexity of the preparation for trials and considerable cost.

The proposed method can effectively determine reliable parameters the stability of dumps and to extend the functionality by identifying a larger number of parameters the stability of dumps.

The essence of the invention consists in that pic is CNAME devices and the determination of the stability parameters of the blade, before stockpiling at its base mounted anchor system of the four pillars and beams stiffness, installed perpendicular to the racks with the possibility of vertical movement thereon, while for layer-by-layer testing of rocks or separately selected points of the blade to the first pair of beams stiffness at both ends mounted vertical stops with the struts and the load device, and set the truck with the load device to the second pair of beams stiffness, with both ends mounted load device under different values of the angle to beams stiffness or angle of inclination to the horizontal plane, in the places of installation of vertical lugs smooth out horizontal platform, framing prism of dump rock on the prism top wear metal sleeve, set the stamps and the load device from the top and sides to create compressive and shear effort, by means of loading devices transmit the load on the breed of the blade and make the necessary measurements of the parameters of the displacements of rocks and related efforts, created a load device, after which the obtained experimental data will determine the strength parameters of the rock dump.

Savannareth determine the strength properties of the rock dump and reliable parameters the stability of dumps, use the anchor installation system of the four pillars and beams stiffness, installed perpendicular to the racks with the possibility of vertical movement thereon, and to beams rigidity of the assembled device, transmitting to breed loads of different types.

In Fig.1 shows the experimental blade 1, rack 2, beam stiffness 3, the load device 4, the possible surface caving 5, pump station 6.

In Fig.2 - a view a-a on Fig.1.

In Fig.3 shows the load device 4, the fastening elements 7, the beam stiffness 3, possible surface collapse 5.

In Fig.4 - view of B in Fig.1.

In Fig.5 shows the prism 8 of dump rock, metal ferrule 9, the stamp 10, the load device 4, the beam stiffness 3, the carriage 11, the vertical stop 12, the brace 13, the surface of the prototype blade 14.

The implementation of how the study of the stability of dumps is performed in the following sequence: I. Determination of strength properties of rock dump at the implementation of two methods for determining strength characteristics of rocks: 1. shift prisms pile of rocks enclosed in a cage; 2. shift blocks rock dump using the three slits.

Preparatory work:

depending on the goals and objectives of testing prepare the Foundation and (for example, pouring a concrete mixture) and connect to the two pairs of beams stiffness 3 at the height that meets the specific objective of the study the dump and dump rock;

- loading device 4 is connected with a pump station 6;

form pilot blade 1 (see Fig.1) with the layer-by-layer seal rocks dump or without it.

1. The shifting prisms of rock enclosed in the clip:

to the first pair of beams stiffness 3 (see Fig.5) at both ends mounted vertical supports 12 by struts 13 and the load device 4, and set the truck 11 with the load device 4, in the places of installation of vertical lugs 12 smooth out horizontal platform, framing prism 8 of dump rock on the prism top wear metal sleeve 9, set the dies 10 and a load device 4 from the top and sides to create compressive and shearing forces;

- shift selected from the blade of the prisms 8 rocks enclosed in the casing 9, carried out using two load device 4 (see Fig.5), and the first of them, rigidly United with a vertical emphasis 12 and strut 13, creates a shear load, and the second, rigidly United with the cart 11 is freely movable along the beam stiffness 3, creates a vertical compressive, uselogo connection;

- make the necessary measurements of the parameters of the displacements of rocks and related efforts generated by the load device 4.

Thus, it is possible to cut the required number of pre-selected prisms of rock dump at different values of vertical compressive pressure generated by the load device 4. The information obtained will be sufficient to plot shear dump rock and accordingly to determine their strength properties.

To improve the reliability and validity of the obtained results similar experiments are performed on opposite ends of the considered beams stiffness 3. Increasing the repetition definitions of strength characteristics of rocks, if the dump consists of homogeneous rocks, and obtaining reliable values of the integral strength characteristics in different points of the blade from heterogeneous mass in the case of disordered aggregates.

2. Shift blocks rock dump using the three slits (Guide for design and installation underground engineering structures. - M.: stroiizdat, 1986, 118 S., S. 21):

the second pair of beams stiffness 3 with both ends mount a load device 4 for different values of the angle naked on the surfaces collapse 5 is produced by means of loading devices 4 with fixation shift effort when shifting unit. Moreover, the load device 4 is located below the surface of the slope of the blade, forming one of the three slots. The other two slits parallel to each other, are selected on the edges of the load device below the slope.

Spending on two opposite ends of the second pair of beams the stiffness of two independent tests of the rock dump load device 4 and for different values of angles of inclination to the horizontal plane or to beams stiffness, as well as for different values of the angles of the falling plane shift(see Fig.1) can determine the calculated values of the strength characteristics of rocks by appropriate formulas above guide. On a similar scheme can determine the strength parameters of dump rock from a horizontal surface of the upper platform of the dump method bulging prisms (See. Methods for determining the strength of clayey rocks. Ed. by G. K. of Bondarik. - M.: Nedra, 1974, 216 S., S. 91).

All the experiments are accompanied by measurements of geometrical parameters of the blade and its individual points before and after the application loads.

3. Investigation of the stability of the blade in the transfer of load from mining and transport equipment:

- prepare the base of the pile;

- mount áfor tests: final ledges, berms, upper Playground;

- to beams stiffness 3 mount the load device 4 (see Fig.3) for transmission to the simulation load from mining and transport equipment to the elements of the blade. For example, the load applied prosobranch in two strips the width dump scarp or berm (see Fig.3);

- connect the load device 4 pumping station 6 (see Fig.1);

- using load device 4 on the blade elements transmit the load steps up to the critical, appropriate deformations of the rock dump, such as the collapse of the plot of the slope of the dump;

- fixed critical load, measure the deformed sections of the dump;

- performs analysis of the received information.

Moreover, the load device 4 can be installed in any place of the dump slope and the top of the site: directly at the upper edge of the slope and at a distance from it, on the berm, and atalina the ledge. In the course of the experience set the character and the kinematic scheme of deformation experienced blade under the influence of various size and nature of the loads.

In the proposed method to solve the following tasks:

- direct obtaining reliable strength properties of the rock dump;

reliable is xperimenta on the same blade;

- reliable and efficient study of the impact load from mining and transport equipment on the stability of the dumps;

- study the possibility of increasing the stability of dumps by increasing their height and angle of repose;

- low cost of implementation of the method due to the reduction in the number of experienced dumps while increasing the quality and quantity of information received.

Claims

Method of study the stability of the dumps, including stockpiling, impacts on the surface of the blade load devices and the determination of the stability parameters of the blade, characterized in that prior to stockpiling at its base mounted anchor system of the four pillars and beams stiffness, installed perpendicular to the racks with the possibility of vertical movement thereon, while for layer-by-layer testing of rocks or separately selected points of the blade, to the first pair of beams stiffness at both ends mounted vertical stops with the struts and the load device, and set the truck with the load device to the second pair of beams stiffness, both ends are mounted load device under different values of the angle to beams stiffness or ulnae site, framing prism of dump rock on the prism top wear metal sleeve, set the stamps and the load device from the top and sides to create compressive and shear effort, by means of loading devices transmit the load on the breed of the blade and make the necessary measurements of the parameters of the displacements of rocks and related efforts, created a load device, after which the obtained experimental data will determine the strength parameters of the rock dump.

 

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