SU1335701A1 - Method of underground mining of ore deposits - Google Patents

Abstract

The invention relates to the mining industry, preserves the ecology of the undermined massif and reduces labor costs for the formation of artificial supports by repeated use of rocks. Preparatory workings are carried out by conducting paired floors one below the other by field 1 and ore 2 drifts. Development of the floors are cameras. The chipping of the chambers is carried out by trenches with bottoms formed at an angle to the horizon, providing the by-pass of the ore and rocks by gravity and beads, beveled at the top. The chambers cut through the exhaust trenches through one along the strike of the field. The boards are mown only along the top along the contact with the recumbent side. In the developed space of the chambers and trenches under them form artificial supports with a step equal to the maximum span of the exposure of the roof rocks along the strike of the deposit. The pillars are formed by filling the rock from the sweeping of the chambers and additional filling the goaf with rock from the previously formed pillars of the overlying floors. (L. Fig. 1 9

Description

1335701 Supports on non-cut sections of ore breaking and its release into trenches.

measures are created by mixing rocks with live materials. Then produced

,

The invention relates to the mining industry and can be used in mines that develop horizontal, hollow and inclined deposits in resistant and moderately stable rocks and ores of medium and above average stability.

The purpose of the invention is to preserve the ecology of the array being worked up and to reduce labor costs for the formation of artificial supports by repeated use of rocks.

FIG. 1 shows the plan of the work area with the horizontal front of the development of works (with the vertical front of the development of the cleaning works, the work is carried out by strips in a drop width equal to the width of the work area), in FIG. 2 shows section A-A in FIG. 1 (by the fall of the ore body); on .fig. 3 shows a section BB in FIG. 1 (along the strike of the section of the floor that has been torn under trenches) in FIG. 4 shows a section B-B in FIG. 1 (along the strike - a section of the floor with broken off chamber ore reserves); Fig. 5 shows a section of G-.G in Fig. 2 (along the strike of the ore body (chamber-trench on the lower floor, filled with rock); Fig. 6, the scheme of repeated use of rock with (block I) vertical development of cleaning works.

The area of work with a horizontal front of development includes field 1, ore 2 drifts, rising 3, ort-run 4 to the lower part of the trench, artificial support 5 (chamber-trench filled with rock), temporary inter-chamber pillars 6, temporary interfloor pillar 7, an outlet trench 8, inclined transport connections 9, delivery blast wells 10, temporary interblock (inter-chamber) pillars 11 left through the fall step of the fall, ort-lock 12 to the top of the trench.

., -

The release of unbound rock is carried out after the mixture has hardened. 6 Il.

15

s

; 20 - -

 i

25

The method is carried out as follows.

The ore body is divided into areas, the size of which is determined by the strike from the effective length of the transport equipment, which is deposited in the worked-out rock into the developed space. The preparation of the site can be floor or panel, depending on the angle of the ore mining and is carried out by conducting paired floor ) one below the other field 1 and ore 2. shtreks, while the vertical distance between them is chosen so that the effect of refining works does not affect the workings of the transport horizon. Drives 1 and 2 are knocked over by the rebels through 50-60m. In each section of this section, the field drift is knocked down with the ore drift of the lower floor with a slope (Fig. 1). Development of floors is carried out by cameras, leaving interfloor temporary pillars 7. Cutting chambers is carried out by passing from a field drift along the longitudinal axis of the chamber, anta-check 4, from which the trench-forming rising ones pass at an angle to the horizon providing the flow of ore and rock automatically which are knocked down with the ore drift of the overlying horizon, the other - with the ore drift of the orta horizon. The rock sector enclosed between them is drilled by wells, after the explosion of which the rock under its own weight falls on the transport horizon (in the face of the orta-race), from where the loading and hauling machines are taken to the developed space. Thus, an exhaust trench 8 is formed. The ore is beaten off by deep wells to an empty exhaust trench and, under the action of forces - an explosion and gravity, is moved onto the ground of a transport ort - train. Broken ore

transported to the nearest mine.

The development of works is carried out as follows.

Under the floor being worked out, on the boundaries of the collapse step along the strike of the overburden, form a developed space, fig (fig. 4), after which they proceed to the breaking down of chamber ore reserves not trimmed with trenches, with this using an explosive delivery of ore horizontally to empty trenches of neighboring chambers, the sides of which along the top along the contact with the recumbent side of the chamber reserves of ore are mown under

This is from the final 8-trench and camel delivery of broken ore by gravity

Pans 5 above it (with broken ore), are filled with rocks from chipping chambers in trenches on the upper horizon (within the strike step along the strike), the number of which depends 15 on the size of the break step, and covering rocks. In this case, a smooth landing of the roof is foreseen, therefore the supports 20 form at the boundaries of the collapse step along the strike of the ore body (or at the borders of the maximum allowable spans of the roof rock outcrops).

25

Cameras cut the discharge trenches through one.

The sides of the trench are vertical and the distance between them along the strike of the ore body is reduced to the minimum value — a threefold maximum p & of the standard piece. The cuttings are cut only along the top along the contact with the recumbent side of the chamber ore reserves by blasting wells, drilled parallel to the sides at the distance of the line of least resistance (LNS) in contact with the supine side of the ore body. This makes it possible to maximize the use of the volume of the exhaust trench for the purpose of transporting the ore along the entire length of the cleaning chamber without people entering the chamber with the formation of the minimum amount of rock for laying the mined-out space, which reduces the cost of trenching the ore body and the lack of rock fill with rocks from similar supports of the upper horizons by releasing it to the transport horizon through trenches and further bypassing the working horizons in o newly formed artificial supports. Chamber reserves of ore are taken in sets of vertical: fans of wells, drilled from ore: drifts, on trenching trenches

35

40

45

50

55

or close to it. This is done before blasting the ore by blasting wells (Fig. 3), drilled parallel to the vertical sides of the trench by contact with the recumbent side of the chamber reserves of ore from the ore drifts 2, which are partially buried in the stationary reservoir (Fig. 2). The sloping length of the chambers in the fall (it is also the sloping height of the floor) is based on the effective length of drilling from the upper and lower ore drifts 2. The load of artificial supports is produced by blasting the empty trenches of temporary barrier pillars 11 on the upper horizon, whose role No repulsed chamber stock of ore is carried out for graves of the caving step. The removal of these chambers is carried out after working off. the lower levels, the entrance to the zone is the step of self-destruction of the roof by falling.

After relaxation of the overlying rock strata on the overlying floors, the JOt sub-horizontally from top to bottom alternately from one flank to the opposite release the rock through the trenches onto the transport horizon from artificial pillars, which are used to lay the worked-out spaces under, the artificial pillars of new working horizons. At the same time, the roof smoothly sits on a rock sandwiched between the soil and the roof. In those cases when it is necessary to support the roof (not to allow it to land) around the perimeter of the chamber (artificial support) over the uncut sections of the trench when it is filled, it is mixed into the rock in adhesives. The release of unbound rock is made through the trench after curing with butobeton. In this case, the roof is held in a ring-shaped (around the perimeter of the chamber) with a concrete support.

FIG. Figure 1 shows a variant with a horizontal development of the cleaning front, which is production-. leads along the floor in blocks with

(Fig. 4), after-issuing of which, they proceed to the breaking down of chamber ore reserves not truncated with trenches, with this, explosive delivery of ore horizontally to empty trenches of adjacent chambers is used, the boards of which along the bedside side of the ore reserves are mown

 delivery of broken ore by gravity

50

five

about

five

0

five

0

five

or close to it. This is done before blasting the ore by blasting wells (Fig. 3), drilled parallel to the vertical sides of the trench by contact with the recumbent side of the chamber reserves of ore from the ore drifts 2, which are partially buried in the stationary reservoir (Fig. 2). The sloping length of the chambers in the fall (it is also the sloping height of the floor) is based on the effective length of drilling from the upper and lower ore drifts 2. The load of artificial supports is produced by blasting the empty trenches of temporary barrier pillars 11 on the upper horizon, whose role No repulsed chamber stock of ore is carried out for graves of the caving step. The removal of these chambers is carried out after working off. the lower levels, the entrance to the zone is the step of self-destruction of the roof by falling.

After relaxation of the overlying rock strata on the overlying floors, the JOt sub-horizontally from top to bottom alternately from one flank to the opposite release the rock through the trenches onto the transport horizon from artificial pillars, which are used to lay the worked-out spaces under, the artificial pillars of new working horizons. At the same time, the roof smoothly sits on a rock sandwiched between the soil and the roof. In those cases when it is necessary to support the roof (not to allow it to land) around the perimeter of the chamber (artificial support) over the uncut sections of the trench when it is filled, it is mixed into the rock in adhesives. The release of unbound rock is made through the trench after curing with butobeton. In this case, the roof is held in a ring-shaped (around the perimeter of the chamber) with a concrete support.

FIG. Figure 1 shows a variant with a horizontal development of the cleaning front, which is production-. leads along the floor in blocks with

length along strike S equal to the pitch of the overburden of the overlying strata of rocks. So, in the first bl (ke I (Fig. 1), counting from the massif of pounds, on the lower floor g form the worked out space (pass the trench and beat it

the ore in the second block II is filled with a similar developed space with rocks from the sweep of the upper section

in the third block III, the chamber reserves of ore are beaten off by empty trenches, in block IV they give ore from the chambers that are not trimmed with trenches, and in block V they give out ore of 15 temporary intermediate floors. RLZ; s with a high concentration of mining operations, which allows you to more fully use self-propelled technology or continuous transport. The release of rock starts from the flank trench and develops to the opposite flank of the site. At the same time, the release of the rock is made on the thickness of the layer, not exceeding the permissible value of the deflection of the overlying strata of rocks, so as not to overlap the integrity of the roof rocks. This allows for a smooth landing of the roof, which preserves the ecology of the 30th overlying layer. The ore, which has been suspended in parts not cut by trenches, is dumped into empty trenches by blasting holes 10, drilled through contact with the lateral side of the ore body, while g significantly increases the completeness of the mineral excavation.

Claims (1)

Formula of gain The method of underground mining of ore deposits, including the carrying out of preparatory workings, the development of floors by chambers, cutting chambers trenches with bottoms formed at an angle to the horizon, providing samtekom ore and rocks bypasses in the upper part, the formation of artificial pillars in the developed chamber space and trenches under them, due to the formation of rock — from sweeping up of the adjacent cells, breaking the ore and releasing it into trenches, characterized in that, in order to preserve the ecology of the masses being worked up willow and reduction of labor costs for the formation of artificial supports by repeated use of rocks, cutting trenches of chambers through one field along the strike, artificial supports form in increments equal to the maximum span of the exposure of the roof rocks along the deposit, while the formation of supports is carried out to full filling the mined-out space with a rock from previously formed supports of the overlying floors, and the artificial ones on the uncut sections of the chambers are created by mixing the rocks with With the burning materials, while the release of unbound rocks is carried out after the mixture is solidified,. AK of 2 Fig .:} (W / X / XX // XX / f FIG. Yr f, T Horus f.Jp. GPR n -p 8t -a -Creditor G. Gerber Compiled by, Cherkashenin Tehred L. Serdyukova Proofreader H, King Order 4029/29 Circulation 454Subscription VNIIPI USSR State Committee .on matters of inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and Printing Enterprise, Uzhgorod, st. Project, 4 /y.5