SU1060794A1 - Method of combination working of adjoining sloping seams - Google Patents

Abstract

1. METHOD OF COMBINED DEVELOPING Approaches steep seams comprising simultaneous vtsemkuplastov open and underground works, quarrying a staggered formation, development p.odzemnugo another storey reservoir collapse to form a chamber and forming interchamber tsoly Cove, pillars collapse and overlying a subsurface formation, formation zones collapse and sinkholes in the excavation site and the placement of the overburden rocks of the open pit in the zone of failure, about h. In order to reduce losses and dilute the mineral and increase the safety of mining operations, the upper floor is developed along a stretch with a step of collapse equal to the width of the chamber and interchamber pillar, and the X1 measures have a long side along the strike, a dip funnel form in the central part of the excavation area, expand the funnel when the pillars collapse towards the outer borders of the excavation section and deepen when developing the lower floors, the chambers of which have lengths second side across the strike and caving zone formed on the working line interface circuits and limit the quarry, the safety berm form N hydrochloric constant magnitude. 2. The method of claim. 1, of m and n. This and the fact that the formation of a safety berm of a constant size is carried out by the extraction of minerals by open and underground methods in the volumes determined by the ratio nS ViiJfa KoT "f where P is the number of floors (ledges) in the work when processing the underlying formation by underground method, APOU - annual production of underground mining 1 works, the same, open mining WITH works, St - the ore is the area of the layers developed respectively by the open and underground methods, ilS2 is the density of the ore of the layers being developed respectively open and sub, terrestrial methods, - respectively koeffits11onty recovery in open pit and underground,

Description

The invention relates to the mining industry and can be used in the development of mineral deposits. There is a method of combined development of mineral deposits, which includes the development of one reservoir to a depth of over 200 m by the open Elm method, the subsequent excavation of the second reservoir, located under the open pit, by underground method systems with forced floor collapse of the ore and host rocks from external contact with the host rocks in career side 1. The disadvantages of this method are the increased safety of work and the relatively high loss of ore. The closest to the proposed technical essence and the achieved result is a method of combined development of closely-spaced steeply dipping layers, including simultaneous excavation of open and underground works, career development of one layer with ledges, underground development of another layer with floor collapse with formation of chambers and formation of inter-chamber pillars, collapse of pillars and overburden, formation of collapse zones and sinkhole funnels at the excavation site and placement of overburden rocks career in the failure zone 2. The disadvantages of this method are the relatively high loss and dilution of the ore and the danger of mining. The purpose of the invention is to reduce losses and dilution of a useful claim and to increase the safety of mining operations. The goal set is achieved according to the method combined. development of contiguous steeply dipping layers, including simultaneous excavation of open and underground works, quarry development of one layer with ledges, underground development of another layer by floor collapse with the formation of chambers and formation of interchamber pillars, destruction of tseiik and overlying stratum, formation of collapse and the depth of the dip in the excavation area and the placement of the overburden rocks of the open pit in the zone of failure, the upper floor is developed along strike with a step of collapse equal to the width of the chamber and between the chambers The rear sight pillars, the chambers have a long side along the strike, form a sink funnel in the central part of the excavation area, expand the funnel when the pillars collapse towards the outer borders of the excavation section and deepen when developing the lower floors, the chambers of which have a long side across and the collapse zone is formed along the interface of the working and limit contours of the open pit, while the safety berm is formed of a constant size. In addition, the formation of a safety berm of a constant size is carried out by mining the open-pit and underground methods in volumes determined by the ratio .1Cu2 otkr 5lK, the number of floors (ledges) that are in operation when the underlying layer is worked up underground , year underground mining performance. works, stcr - the same, open-pit mining, ore area of the seams, developed respectively by the open and under the earth methods, Ug is the density of the ore of the seams, developed, respectively, by the open and underground methods, K, recovery factors, respectively, with the open and underground methods. FIG. 1 shows the proposed method for the combined development of closely spaced layers, the combination of vertical projections of the layers developed by the open method and the underground method, FIG. 2 is a midline section of the strike of the seam, developed by the open method with a view on. collapse zone, in fig. 3 A cut across the center of the field before the formation of the primary sinkhole funnel, at. FIG. 4 shows a cross section of a strike along a formation developed by an underground method with the initial stage of formation of the primary sinkhole funnel; FIG. 5 is a section through a horizontal plane in the middle of the first floor; FIG. b - horizontal incision in the middle of the second floor. The method of combined development of contiguous steep seams includes the development by the open method of the overlying layer 1 and by the underground method of the underlying layer 2 with the trapezoidal shape 3 of the developed space, which is similar to form 4 with the open method. With the open method, mining is carried out with ledges 5 with the formation of a split trench 6 with a dredging pit in the central part and the development of refining operations to the flanks of the field.

In underground mining, a clearing excavation includes testing blocks I, II, III, IV, V, etc. cameo ramie 7 with pillars 8, the formation of the primary funnel of the dip 9, the forced collapse of the overlying strata of rocks 10 with a step of collapse 11, the subsequent development of stocks of the first floor from the middle line 12 of the stretch and the self-collapse of the leaning strata of rocks 13 beyond the primary funnel of the dip lowering the level of cleaning works in the central part of the field and the creation of a trapezoid-shaped developed space with ledges 14, development of ledges by chambers 15c 16 and ceiling 17, forming a zone of collapse 18th century. 19 described by the mating line 20 of the working mouths 5 with a limit of 21 and the boundary 22, which is separated from the mating line 20 at a distance equal to the width of the safety berm 23.

The method is carried out as follows.

At the same time, they carry out a clearing excavation of the seams 1 and 2 by open and undermaking methods. The reservoir 1 is developed from the center of the field of the flanks with an intensive pit deep in the center to a depth determined from

H

 Bd + ltgcj,

rccr

where the distance from the surface to the point of intersection of the line of the marginal contour of the pit with the line of displacement of rocks, m,

L is the horizontal distance from the pit bottom to the point of intersection of the sloping line of working benches with the marginal contour of the quarry, m, Cf is the resulting angle of the line of the contour of working benches, degrees.

When dredging the pit from the surface to the depth H (the reserves of the first floor of reservoir 2 are developed with kosher 7, leaving between the chamber pillars 8. Splitting chambers; they are long side along the length of the LEAU of reservoir 2, in order to create the maximum exposure area.

during the formation of the primary funnel of the dip 9 during the forced collapse of the overburden of rocks and the transfer of mining operations to the lower floor.

After the quarry reaches the depths in the center of the field lead to the forced collapse of the mass of host rocks 10 to chamber 7 with the formation of the primary funnel

0 conduct 9, then lead the forced floor collapse of the pillars and the overlying strata of rocks with a step of collapse 11 equal to the total width of the rear sight 8 and. adjacent chamber 7 in a 5-step order from the open pit to the external contact of reservoir 2, with the formation of the primary sinkhole 9, the length equal to the horizontal thickness of the reservoir 2 and the width equal to the size 0 of the chamber along the strike with the further development of cleaning works from the primary sink funnel 9 to the flanks of the field with self-destruction of the overlying stratum of rocks 13. From the middle line 12 of layer 2 to the quarry i and the recumbent block.

After redemption of the voids and the development of stocks between chamber pillars 8

Q in the zone of the primary funnel of the dip 9. proceed to the excavation of stocks of chambers 15, located long side across the aisle of formation 2 on the lower floors. The cameras 15 are the largest in size.

 across the strike to the entire horizontal thickness of reservoir 2 in order to increase the stability of the inter-chamber pillars during the development of rock pressure from the host psfod

0 lying side. Depletion of reserves of chambers 15, pillars 16 and ceiling 17 is carried out with a permanent decrease in sewage treatment in the center of the field and the formation of ledges 14 and their development to the field flag with a speed of movement of sewage treatment equal to the speed of open cast mining, while the zone of collapse is formed along line mates

The working and boundary sides of the open pit, while the safety berm is formed of a constant value by maintaining the ore production volumes determined by the above ratio.

55

The use of the invention makes it possible to increase the efficiency of the combined development of contiguous steeply dipping layers of minerals.

Claims (2)

1. METHOD FOR COMBINED DEVELOPMENT OF APPROXIMATED SHORT-DEPTH LAYERS, including simultaneous all-inclusive open-pit and underground mining, open pit mining of one stratum with ledges, underground development of another stratum by floor caving with the formation of chambers and the formation of interchamber targets, collapse of the pillars and collapse collapse and funnel failure in the excavation site and the placement of overburden quarry rocks in the failure zone, about l and h a-. : in order to reduce losses and dilute minerals and increase the safety of mining operations, the upper floor is developed along strike with a caving step equal to the width of the chamber and the interchamber pillar, with the chambers having a long side along the strike, a funnel of failure is formed in the central part of the excavation site, the funnel is expanded when the pillars collapse towards the outer borders of the excavation site and deepened when developing the underlying floors, whose chambers have a long st Rhone across the strike and caving zone formed on the working line interface circuits and limit the quarry, the safety berm form a constant value. · 2. The method according to π. 1, about t l and. I want to say that the formation of a security berm of constant magnitude is carried out by extracting minerals by open and underground methods in volumes determined by the relation annual production ⁴ underground mining operations, ^l open ” ^same r open cast mining, S _t - ore area of formations developed by open and underground methods, respectively, ore density of formations developed respectively by open washed and under. . earthly ways - recovery coefficients, respectively, with open and underground methods.