CN106121643B - Reserved two step nesting of retaining wall mine combines the method for mining by the way of filling - Google Patents

Reserved two step nesting of retaining wall mine combines the method for mining by the way of filling Download PDF

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Publication number
CN106121643B
CN106121643B CN201610793168.1A CN201610793168A CN106121643B CN 106121643 B CN106121643 B CN 106121643B CN 201610793168 A CN201610793168 A CN 201610793168A CN 106121643 B CN106121643 B CN 106121643B
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China
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mine
production
retaining
stope
ore
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CN106121643A (en
Inventor
帅金山
李向东
刘成平
盛佳
朱志彬
周益龙
孙德胜
佘昌亚
万兵
院雷
李强
胡勇
李永辉
李龙
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Hubei - Ltd By Share Ltd
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Hubei - Ltd By Share Ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/005Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material

Abstract

The present invention is a kind of two step nesting of reserved retaining wall mine combination method of mining by the way of filling, it is related to the technical field of underground mine exploitation, be to solve sublevel drilling stage open stope afterwards filling method when exploiting weak-walled ore body, the loss of the ore technical problem larger with dilution and design.The step of this method, is as follows:It is a step stope and two step stopes by ore body division, and carries out adopting standard, cutting for ore body;A step stope described in back production, and reserved retaining wall mine builds the back production environment of the two steps stope, the step stope barnyard back production afterwards consolidated fill;Two step stopes and the retaining wall mine described in back production simultaneously fill respectively.Two step stope environment are built by reserved shield mine wall, pass through the back production connection roadway back production retaining wall mine of two step stope of reasonable Arrangement again, to reduce the exposure duration of unstable rock, it not only ensure that rational stoping strength but also fully recycled nearly country rock ore, and reduced the loss and dilution of ore.

Description

Reserved two step nesting of retaining wall mine combines the method for mining by the way of filling
Technical field
The present invention relates to the technical fields of underground mine exploitation, more particularly, to a kind of two step nested groups of reserved retaining wall mine Close the method for mining by the way of filling.
Background technology
Poor for high value, country rock stability condition in " under three " and scenic spot, middle thick~thick big and moderately stable Sublevel drilling stage open stope afterwards filling method is a kind of proper adopts for efficient, the extensive enhanced recovery in the above mineral deposit Mine method.
Sublevel drilling stage open stope afterwards filling method is on the basis of being the stage by ore body division, then by divided stages Segmentation, along orebody trend direction, is divided into a mineral building and ore pillar, room of first digging up mine, column of digging up mine afterwards, and handles goaf simultaneously.
Strong compared with Stage open stoping to the inclination angle adaptability of ore and country rock stability and ore body, use scope is wide, flexibly Property is big;But when exploiting weak-walled ore body, the loss and dilution of ore are larger.
Invention content
The purpose of the present invention is to provide a kind of two step nesting of reserved retaining wall mine combination method of mining by the way of filling is existing to solve Sublevel drilling stage open stope afterwards filling method present in technology when exploiting weak-walled ore body, the loss of ore with it is poor Change larger technical problem.
The present invention is a kind of two step nesting of reserved retaining wall mine combination method of mining by the way of filling, is included the following steps:
(1) it is a step stope and two step stopes by ore body division, and carry out ore body adopts quasi- cutting;
(2) a step stope described in back production, and reserved retaining wall mine builds the back production environment of the two steps stope, it is described One step stope barnyard back production afterwards consolidated fill;
(3) it two step stopes and the retaining wall mine described in back production and fills respectively.
Further, a step stope described in back production is dug up mine using sublevel drilling stage open stope afterwards filling in step (2) Method.
Further, two step stopes described in back production use filling-up method in step (3).
Further, accurate the step of cutting engineering of adopting of ore body, includes in the step (1):
Lane, and stage casing ore removal lane and stope along the pulse in stage casing ore removal lane and arteries and veins is tunneled successively since the level haulage lane Ore pass perforation;
Connection roadway and lower wall people's row equipment raise outside the horizontally disposed arteries and veins of bottom structure ore removal, the outer connection roadway of the arteries and veins with it is described Lower wall people's row equipment raise unicom tunnels the step stope by connection roadway outside the arteries and veins and the lower wall people row equipment raise Sublevel drilling gallery;
In each sublevel drilling gallery close to one end of upper disk driving cutting crosscut and slot raise, in the cutting Drilling upper centripetal deep hole in crosscut forms cutting groove by scope of freedom explosion of the slot raise;
People's row ventilation shaft in direct route ore pass and arteries and veins is tunneled in the two steps stope, people's row ventilation shaft joins in the arteries and veins Logical upper stage casing and lower stage casing, the direct route ore pass and stage casing ore removal lane unicom, are tunneled out from bottom structure ore removal level The lanes Kuang Chuanmai and ore removal connection roadway.
Further, a step stope is by mine lane as the scope of freedom to be undercuted, and forms first and undercuts layer;One step stope is reserved Retaining wall mine include that the first L-type retaining wall mine, the second L-type retaining wall mine, the first strip-type entirety retaining wall mine and Article 2 banding pattern are whole Retaining wall mine;The layer that undercuts of described the first of upper disk reserves the first L-type retaining wall mine, the described first each layering point to undercut more than layer It Yu Liu not the first strip-type entirety retaining wall mine;The layer that undercuts of described the first of lower wall reserves the second L-type retaining wall mine, described The Article 2 banding pattern entirety retaining wall mine is reserved in the first each layering to undercut more than layer respectively.
Further, in the exploitation process of the step stope, personnel and equipment by lower wall people's row equipment raise into Enter each sublevel drilling gallery;It is dug to fan shaped medium length hole explosion, Luo Kuang in each sublevel drilling gallery with rock drill.
Further, when the two steps stope upward horizontal slice back production, second is horizontally formed in bottom structure ore removal Undercut layer, and reinforced concrete artificial bottom layer is constructed in described second layer that undercuts, or described second undercut layer using filling aggregate and Cementitious material constructs consolidated fill layer.
Further, the layer that undercuts of described second of two step stopes described in back production includes the following steps:
(A) structure reserved the first L-type retaining wall mine in pan bottom in back production, uses tailings high intensity glue after back production Knot filling forms " V " type nesting combination filling structure;
(B) in the level of undercuting using ore removal connection roadway in stope as the scope of freedom, using the lanes the ore removal Chuan Mai as back production boundary, shape Parallelogram is built using quadrilateral structure back production region described in shallow bore hole method back production at parallelogram sturcutre back production region Subregion fills structure;
(C) back production lower wall bottom structure reserved the second L-type retaining wall mine uses tailings high intensity glue after back production Knot filling forms " K " type nesting combination filling structure.
Further, described second of two step stopes described in back production undercut layering more than layer when include the following steps:
(I) the first strip-type entirety retaining wall mine described in shallow bore hole method back production is used, tailings high intensity glue is used after back production Knot filling;
(II) two step stopes described in shallow bore hole method back production are used;
(III) Article 2 banding pattern entirety retaining wall mine described in shallow bore hole method back production is used, tailings high intensity glue is used after back production Knot filling.
Further, there are foundation, the foundation to carry out back production after upper stage casing and lower stage casing back production in stage casing.
Compared with prior art, beneficial effects of the present invention are:
Two step stope environment are built by the reserved shield mine wall of a step stope, then pass through two step stope of reasonable Arrangement Back production connection roadway back production retaining wall mine, to reduce the exposure duration of unstable rock.Meanwhile by the two organic knots of step stope It closes, not only ensure that rational stoping strength but also fully recycled nearly country rock ore, ore caused by reducing unstable rock damages Mistake and dilution.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of section for embodiment that two step nesting of reserved retaining wall mine provided by the invention combines the method for mining by the way of filling Front view (the A-A sectional views of Fig. 3);
Fig. 2 is the vertical view (the B-B sectional views of Fig. 1) of bottom structure level in embodiment shown in FIG. 1;
Fig. 3 is the vertical view (the C-C sectional views of Fig. 1) of stage casing level in embodiment shown in FIG. 1;
Fig. 4 is the side view (the D-D sectional views of Fig. 1) of a step stope mining in embodiment shown in FIG. 1;
Fig. 5 is the side view (the E-E sectional views of Fig. 1) of two step stope minings in Fig. 1.
Reference numeral:
The bis- step stope 3- vacations bottoms mono- step stope 2- of 1- and peach type ore pillar
The lanes 4- ore removal Chuan Mai Xiang5-Shou Kuang 6- ore removal connection roadways
The outer connection roadway of people row ventilation shaft 9- arteries and veins in 7- ore pass 8- arteries and veins
Along the pulse lane 12- direct routes ore pass in the 11- arteries and veins of 10- level haulages lane
The direct route people stage casings row ventilation shaft 14- 13- ore removal lane 15- back production lane
16-lower wall people's row equipment raise 17- fan shaped medium length hole 18- sublevel drilling gallerys
19- broken ore 20- high intensity cemented fills
21- low-intensity cemented fill 22- the first L-type retaining wall mines
23- the second L-type retaining wall mine 24- " V " type nesting combination filling structure
25- " K " type nesting combination filling structure 26- the first strip-type entirety retaining wall mines
27- Article 2 banding pattern entirety retaining wall mine 28- scrapers
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill The every other embodiment that personnel are obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation, With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ", " third " is used for description purposes only, and is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected;It can Can also be electrical connection to be mechanical connection;It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.
Fig. 1 is a kind of section for embodiment that two step nesting of reserved retaining wall mine provided by the invention combines the method for mining by the way of filling Front view (the A-A sectional views of Fig. 3);Fig. 2 is that (B-B of Fig. 1 is cutd open for the vertical view of bottom structure level in embodiment shown in FIG. 1 Face figure);Fig. 3 is the vertical view (the C-C sectional views of Fig. 1) of stage casing level in embodiment shown in FIG. 1;Fig. 4 is reality shown in FIG. 1 Apply the side view (the D-D sectional views of Fig. 1) of a step stope mining in example;Fig. 5 is the side view of two step stope minings in Fig. 1 (the E-E sectional views of Fig. 1).
As shown in Figure 1, two step nesting of reserved retaining wall mine provided in this embodiment combines the method for mining by the way of filling, including walk as follows Suddenly:(1) it is a step stope 1 and two step stopes 2 by ore body division, and carry out ore body adopts quasi- cutting;(2) one step of back production Rapid stope 1, and reserved retaining wall mine builds the back production environment of two step stopes 2,1 barnyard back production of a step stope is afterwards cementing to fill It fills out;(3) it two step stope 2 of back production and retaining wall mine and fills respectively.
It should be noted that the mine contacted with country rock that the retaining wall mine mentioned in the present embodiment, which refers to exploitation process, to be left Body.
Mineral deposit 40~60m of level interval, 50 °~90 ° of the slanting angle of ore body, as ore body horizontal breadth < 30m, stope is along ore body Arrangement is moved towards, a length of 40~50m, width is orebody thickness, depending on orebody thickness back production step by step.As ore body horizontal breadth >=30m When, stope vertical orebody trend arrangement is divided into two step stopes, 1 wide 12~15m of a step stope, and height of lift 10~ 15m;Two step stopes, 2 wide 10~13m.
One step stope, 1 barnyard back production afterwards consolidated fill, is conducive to the abundant back production of two step stopes 2.
The mining environment of two step stopes 2 is built by the reserved shield mine wall of a step stope 1, then passes through two step of reasonable Arrangement The back production connection roadway back production retaining wall mine of rapid stope 2, to reduce the exposure duration of unstable rock.By the two organic knots of step stope It closes, not only ensure that rational stoping strength but also fully recycled nearly country rock ore, ore caused by reducing unstable rock damages Mistake and dilution.
The present embodiment be suitble in " under three " and scenic spot high value, country rock stability condition it is poor, it is middle it is thick~thick greatly and Efficient, the extensive enhanced recovery in the above mineral deposit of moderately stable, can effectively control ground settlement and rock moves, and greatly promote back production peace Whole degree significantly reduces the poor damage index of back production, realizes efficient, micro- poor damage, the safe working of ore body.It should be noted that this reality The middle thick mineral deposit in the roads Shi Lizhongti refers to mineral deposit of the thickness between 15~30 meters, and thick large ore deposit refers to the mine that thickness is more than 50 meters Bed, so, middle thick~thick big mineral deposit, that is, thickness is more than 15 meters of mineral deposit.
On the basis of the above embodiments, specifically, one step stope 1 of back production uses the sublevel drilling stage in step (2) Open stope afterwards filling mining method.
Afterwards consolidated fill, the preceding each ore removal of closing of filling get in touch with road junction and other goafs for one step stope, 1 barnyard back production Outlet sets up filter pipe, and importing filling pipe from upper stage casing is filled, and the sand-lime specific strength of filler is 1~1.5MPa.One Step goaf filling finishes, and body to be filled reaches some strength, after meeting the requirement of two step process for stoping, can start two steps 2 back production of stope.
As shown in figure 5, stage casing refers to the part ore body between back production lane 15 and stage casing ore removal lane 14, stage casing is relative to back production The part ore body of the top of lane 15 is lower stage casing, correspondingly, on the part ore body of 15 top of back production lane relative to lower stage casing is Stage casing.
One step stope 1 reserves retaining wall mine, using sublevel drilling stage open stope afterwards filling mining method back production, both remains The big advantage of sublevel drilling stage open stope afterwards filling method production capacity, while it is compensated for again to unstable rock and ore body shape The disadvantage of state bad adaptability.
On the basis of the above embodiments, specifically, two step stope 2 of back production uses upward horizontal slice in step (3) The method of mining by the way of filling.
When filling-up method back production, working face horizontal slice back production from bottom to top, each layering to dig up mine, Ore removal, filling process cycle operation, obturation safeguard upper lower burrs country rock, and as the workbench adopted on continuing.Construction technology Simply, it is low to adopt accurate and cutting work difficulty, and is not easily formed over-extraction or owes digging, can realize the loss of production ore it is small, The rate of dilution is low.
As shown in Figure 3 and Figure 4, on the basis of the above embodiments, specifically, ore body adopts quasi- cutter in step (1) The step of journey includes:Lane 11, and stage casing ore removal along the pulse in stage casing ore removal lane 14 and arteries and veins are tunneled since the level haulage lane 10 successively Lane 14 and the ore pass 7 of stope penetrate through;Connection roadway 9 and lower wall people's row equipment raise 16 outside the horizontally disposed arteries and veins of bottom structure ore removal, The outer connection roadway 9 of arteries and veins and 16 unicom of lower wall people's row equipment raise, a step is tunneled by connection roadway outside arteries and veins 9 and lower wall people's row equipment raise 16 The sublevel drilling gallery 18 of stope 1;It is horizontal close to the driving cutting of one end of upper disk in each sublevel drilling gallery 18 before substoping Lane and slot raise, the Drilling upper centripetal deep hole in cutting crosscut form cutting groove by scope of freedom explosion of slot raise;Two People's row ventilation shaft 8 in driving direct route ore pass 12 and arteries and veins in step stope 2, in arteries and veins in 8 unicom of people's row ventilation shaft stage casing and it is lower in Section, direct route ore pass 12 and 14 unicom of stage casing ore removal lane, from the lanes bottom structure ore removal level driving ore removal Chuan Mai 4 and ore removal contact Lane 6.
It should be noted that stope bottom structure ore removal level Concrete false bottom pouring before complete long and medium hole drilling and End kerve work.
As shown in figure 4, a segment blast from top to bottom of step stope 1 falls mine, specifically, blasting process is:Using powder charge Device loads bulk granular nitrolite, and blasthole overall length lays primacord, is carried out in blasthole mouth installation msdelayed light emission Nonel detonator Compound explosion is that identical detonation section is other, and takes multiple rows of same segmented mode per tier hole, empty as the scope of freedom and compensation using cutting groove Between carry out explosion, often segmentation point 2~3 separate explosions fall mine and finish.Integral backstopping sequence is that upper disk is lower point advanced to lower wall, upper segmentation Section drawing back.
As shown in Fig. 2, broken ore 19 fills mine using scraper from moat ditch bottom structure, pass through ore removal connection roadway and ore removal Ore is poured into ore pass 7 in arteries and veins by the lanes Chuan Mai 4.As shown in figure 3, ore is transferred from ore pass 7 to electric locomotive, gone out by stage casing Mine lane 14 and level haulage lane 10, are transported to main chute and are promoted to earth's surface.
Quasi- engineering is adopted in the ore body that development work is completed, tunnels necessary well lane engineering, is a step by ore body division 1 and two step stope 2 of rapid stope, and people's row of one step stope 1 of solution and two step stopes 2, ventilation, transport, filling etc. are asked Topic.Engineering is cut in completing mining preparation work ore body, driving slot raise and cutting tunnel, and form necessary excavation. In conclusion adopt accurate, cutting has carried out every preparation for the exploitation of ore body jointly.
As shown in Fig. 2, on the basis of the above embodiments, specifically, a step stope 1 by mine lane 5 for the scope of freedom to be drawn Bottom forms first and undercuts layer;The reserved retaining wall mine of one step stope 1 include the first L-type retaining wall mine 22, the second L-type retaining wall mine 23, First strip-type entirety retaining wall mine 26 and Article 2 banding pattern entirety retaining wall mine 27;The first of upper disk undercut layer reserve the first L-type shield The first strip-type entirety retaining wall mine 26 is reserved in wall mine 22, the first each layering to undercut above layer respectively;The first of lower wall undercuts layer Reserved second L-type retaining wall mine 23, the first each layering to undercut more than layer reserved Article 2 banding pattern entirety retaining wall mine 27 respectively.
It undercuts for the scope of freedom using by mine lane 5, rock drilling gallery is doubled as by mine lane 5, it is deep in progress after completing long and medium hole drilling Hole explosion forms bilateral or unilateral moat ditch bottom structure.The ore of explosion falls into moat ditch bottom structure, leave after the ore of part with This bottom structure filled and led up is the scope of freedom, is undercuted to back production boundary using shallow bore hole, 2.5~3m of the height that undercuts.Then in the layer that undercuts False bottom as shown in Figure 1 and peach type ore pillar 3 are constructed, above-mentioned moat ditch bottom structure is supported.
As shown in Fig. 2, the first of the upper disk layer that undercuts reserves the first L-type retaining wall mine 22 after 1 back production of a step stope, lower wall First undercut layer reserve the second L-type retaining wall mine 23, the thickness range of the first L-type retaining wall mine 22 and the second L-type retaining wall mine 23 Think 2~5m.In addition the first L-type retaining wall mine 22 and the second L-type retaining wall mine 23 are also contacted in two step stopes 2 with country rock respectively Ore body constitute big L-type retaining wall mine, as shown in Figure 2.Each layering more than layer that undercuts of the first of upper disk reserves first respectively Banding pattern entirety retaining wall mine 26;Article 2 banding pattern entirety retaining wall mine 27 is reserved in each layering more than layer that undercuts of the first of lower wall respectively, The thickness of the reserved strip-type entirety retaining wall mine of upper lower burrs can be 2~3m.
By a step stope 1 in the first reserved L-type retaining wall mine 22 of upper disk and lower wall, the second L-type retaining wall mine 23, first Strip-type entirety retaining wall mine 26 and Article 2 banding pattern entirety retaining wall mine 27 make a step stope 1 with two step stopes 2 using nested The mode of combination arranges, can reduce first and undercut the exposed area of layer, stringent control stope mining boundary, additionally it is possible in reduction Lower wall country rock is caving and increases dilution or occur the case where causing ore losses because of the non-avalanche of upper lower burrs ore.
It without tunneling supporting lane, adopts that quasi- quantities is few, the feature of condition difference is consolidated for upper lower burrs country rock, takes reserved rank Section barnyard stope entirety retaining wall mine maintains the stabilization of stope, without in segmentation upper disk driving supporting lane, also need not to upper disk into Row long anchor cable pre support greatly reduces and adopts quasi- engineering and support engineering amount.
On the basis of the above embodiments, specifically, in the exploitation process of a step stope 1, personnel and equipment pass through Lower wall people's row equipment raise 16 enters each sublevel drilling gallery 18;It is dug to sector in each sublevel drilling gallery 18 with rock drill 17 explosion of medium-length hole, Luo Kuang.
Personnel and equipment enter each sublevel drilling gallery 18 by lower wall people's row equipment raise 16.Specifically, may be used YGZ-90 rock drills (matching sledge type rack) are dug to fan shaped medium length hole 17,60~65mm of blasthole aperture, 1.2~1.4m of array pitch, 1.9~2.5m of bottom hole pitch.
Fall mine to 17 explosion of fan shaped medium length hole on, the back production of ore is more efficient, and worker need not continuously into Enter barnyard and carry out driling explosion operation, reduces the working strength of worker.Meanwhile also helping reduction ore loss ratio.
On the basis of the above embodiments, specifically, when two step stopes, 2 upward horizontal slice back production, in bottom structure Ore removal is horizontally formed second and undercuts layer, and reinforced concrete artificial bottom layer is constructed in second layer that undercuts, or undercuts layer using filling second It fills out aggregate and cementitious material constructs consolidated fill layer.
When two step stopes, 2 upward horizontal slice back production, it is horizontally formed second in bottom structure ore removal and undercuts layer, specifically , second undercuts 3.5~4m of layer height, and undercuting second, to pour the steel concrete vacation bottom of 0.5m thickness or cement-sand ratio be 1 to layer:4、 Thickness is the consolidated fill layer of 2~2.5m.
Second layer that undercuts constructs reinforced concrete artificial bottom layer, or uses filling aggregate and cementitious material structure in second layer that undercuts Consolidated fill layer is built, the case where filler is mixed into ore can be reduced and occurred, to reduce the rate of dilution of production ore.
On the basis of the above embodiments, specifically, the second of two step stope 2 of the back production layer that undercuts includes the following steps: (A) the first reserved L-type retaining wall mine 22 of pan bottom structure in back production, uses tailings high intensity consolidated fill, shape after back production Filling structure 24 is combined at " V " type nesting, as shown in Figure 2;(B) undercut level with ore removal connection roadway 6 in stope for the scope of freedom, With the lanes ore removal Chuan Mai 4 for back production boundary, parallelogram sturcutre back production region is formed, is returned using shallow bore hole method back production quadrilateral structure Exploiting field domain, structure parallelogram subregion fill structure, as shown in Figure 2;(C) the second reserved L-type of back production lower wall bottom structure Retaining wall mine 23 uses tailings high intensity consolidated fill after back production, " K " type nesting combination filling structure 25 is formed, such as Fig. 2 institutes Show.
It should be noted that the sand-lime specific strength that the high intensity consolidated fill mentioned in the present embodiment refers to filling is more than 2 ~3MPa, corresponding low-intensity refer to that the sand-lime specific strength of filling is less than 1MPa.As shown in Figure 1, a step stope 1 is high intensity Cemented fill 20 fills, and two step stopes 2 fill for low-intensity cemented fill 21.
The reserved retaining wall mine with two step stopes, 2 mutual structure environment stope of one step stope 1, by two step stopes 2 Give back production to horizontal slice stope reasonable Arrangement back production connection roadway.
The independent nested composite structure of upper lower burrs is that two step bottom structure back production construct good operating environment, is ensured Stoping operation is safe and reliable, and advantageously reduces the exposure duration of unstable rock, both ensure that rational stoping strength Nearly country rock ore has fully been recycled again, has reduced ore dissipation and dilution caused by unstable rock, it is more economical reasonable.
On the basis of the above embodiments, include when more than layer layering specifically, two step stope 2 second of back production undercuts Following steps:(I) shallow bore hole method back production the first strip-type entirety retaining wall mine 26 is used, is filled after back production using high intensity is cementing It fills out;(II) two step stope 2 (III) of shallow bore hole method back production is used to use shallow bore hole method back production Article 2 banding pattern entirety retaining wall mine 27, back production After use tailings high intensity consolidated fill.
Second undercut more than layer slicing when, reserved upper disk the first strip-type entirety retaining wall mine of a step stope 1 26 and lower wall Article 2 banding pattern entirety retaining wall mine 27, it is returned by the connection roadway of two step upward horizontal slice of reasonable Arrangement It adopts.
Shallow eye is dug with air-feed leg drill fall mine, blasthole aperture Ф 40mm in two step stopes, 2 exploitation process.When using on to When shallow eye falls mine, hole depth 2m, slicing height 2m, maximum sky heights of roofs 4m, empty heights of roofs 2m after filling;When using horizontal eye It is shallow when falling mine, hole depth 3m, slicing height 3m, maximum sky heights of roofs 4m, empty heights of roofs 1m after filling.No. 2 rock explosive medicines Explosion is rolled up, the detonation of msdelayed light emission Nonel detonator falls 28 ore removal of ore scraper or artificial ore removal.
Slicing is complete and ore removal it is complete after with classified tailings carry out not consolidated fill, increase 12 He of direct route ore pass before filling Direct route people's row ventilation shaft 13 is opened after filling by 2~3 days drainage times from the decentralization filling pipe filling of stope top courtyard Begin the back production of next layering.
Upper disk the first strip-type entirety retaining wall mine 26 and the integraty retaining wall mine of lower wall Article 2 banding pattern entirety retaining wall mine 27 Completely cut off the unstable surrounding rock at each segmentation of a step stope 1, advantageously reduces the exposure duration of unstable rock, maintains stope Stabilization, without in segmentation upper disk driving supporting lane, not only ensure that rational stoping strength but also fully recycled nearly country rock ore, Ore dissipation and dilution caused by reducing unstable rock, it is more economical reasonable.
On the basis of the above embodiments, specifically, stage casing is there are foundation, foundation finishes in upper stage casing and the back production of lower stage casing After carry out back production.
Specifically, the foundation that stage casing retains can be 8~10m, and the stage casing foundation of reservation will be finished in upper and lower stage casing back production After carry out unified back production.
Stage casing retains foundation and is conducive to protect the haulage drift in this stage casing, ensure other discharging tunnels being located in foundation and The safety of connection roadway.
Finally it should be noted that:The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that:Its according to So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into Row equivalent replacement;And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (8)

1. a kind of two step nesting of reserved retaining wall mine combines the method for mining by the way of filling, which is characterized in that include the following steps:
(1) it is a step stope (1) and two step stopes (2) by ore body division, and carry out ore body adopts quasi- cutting;
(2) a step stope (1) described in back production, and reserved retaining wall mine builds the back production environment of the two steps stope (2), institute State step stope (1) barnyard back production afterwards consolidated fill;
(3) it two step stopes (2) and the retaining wall mine described in back production and fills respectively;
Wherein,
Two step stopes (2) described in back production use filling-up method in step (3);
One step stope (1) forms first and undercuts layer to be undercuted for the scope of freedom by mine lane (5);The reserved shield of one step stope (1) Wall mine includes the first L-type retaining wall mine (22), the second L-type retaining wall mine (23), the first strip-type entirety retaining wall mine (26) and Article 2 Banding pattern entirety retaining wall mine (27);The layer that undercuts of described the first of upper disk reserves the first L-type retaining wall mine (22), and described first undercuts Layer or more each layering reserve the first strip-type entirety retaining wall mine (26) respectively;The layer that undercuts of described the first of lower wall is reserved described The Article 2 banding pattern entirety retaining wall mine is reserved in second L-type retaining wall mine (23), the described first each layering to undercut more than layer respectively (27)。
2. two step nesting of reserved retaining wall mine according to claim 1 combines the method for mining by the way of filling, which is characterized in that step (2) a step stope (1) described in back production uses sublevel drilling stage open stope afterwards filling mining method in.
3. two step nesting of reserved retaining wall mine according to claim 1 combines the method for mining by the way of filling, which is characterized in that the step Suddenly accurate the step of cutting engineering of adopting of ore body, includes in (one):
Lane (11), and the stage casing ore removal along the pulse in stage casing ore removal lane (14) and arteries and veins are tunneled since level haulage lane (10) successively Lane (14) and the ore pass (7) of stope penetrate through;
Connection roadway (9) and lower wall people's row equipment raise (16) outside the horizontally disposed arteries and veins of bottom structure ore removal, the outer connection roadway (9) of the arteries and veins With lower wall people row equipment raise (16) unicom, dug by connection roadway (9) outside the arteries and veins and the lower wall people row equipment raise (16) Into the sublevel drilling gallery (18) of the step stope (1);
In each sublevel drilling gallery (18) close to one end of upper disk driving cutting crosscut and slot raise, in the cutting Drilling upper centripetal deep hole in crosscut forms cutting groove by scope of freedom explosion of the slot raise;
People's row ventilation shaft (8) in direct route ore pass (12) and arteries and veins is tunneled in the two steps stope (2), people's row is logical in the arteries and veins Stage casing and lower stage casing in ventilating shaft (8) unicom, the direct route ore pass (12) and stage casing ore removal lane (14) unicom, are tied from bottom Structure ore removal level tunnels the lanes ore removal Chuan Mai (4) and ore removal connection roadway (6).
4. two step nesting of reserved retaining wall mine according to claim 3 combines the method for mining by the way of filling, which is characterized in that described In the exploitation process of one step stope (1), personnel and equipment enter each segmentation by lower wall people's row equipment raise (16) and dig Rock gallery;It is dug to fan shaped medium length hole (17) explosion, Luo Kuang in each sublevel drilling gallery with rock drill.
5. two step nesting of reserved retaining wall mine according to claim 3 combines the method for mining by the way of filling, which is characterized in that described two When step stope (2) upward horizontal slice back production, it is horizontally formed second in bottom structure ore removal and undercuts layer, undercut described second Layer constructs reinforced concrete artificial bottom layer, or constructs consolidated fill using filling aggregate and cementitious material in described second layer that undercuts Layer.
6. two step nesting of reserved retaining wall mine according to claim 5 combines the method for mining by the way of filling, which is characterized in that back production institute Described the second of two step stopes (2) layers that undercut are stated to include the following steps:
(A) structure reserved the first L-type retaining wall mine (22) in pan bottom in back production, uses tailings high intensity glue after back production Knot filling, forms " V " type nesting combination filling structure (24);
(B) undercut it is horizontal with ore removal connection roadway (6) in stope for the scope of freedom, with the lanes the ore removal Chuan Mai (4) for back production boundary, Parallelogram sturcutre back production region is formed, using quadrilateral structure back production region described in shallow bore hole method back production, builds parallel four side Shape subregion fills structure;
(C) back production lower wall bottom structure reserved the second L-type retaining wall mine is filled after back production using tailings high intensity is cementing It fills out, forms " K " type nesting combination filling structure (25).
7. two step nesting of reserved retaining wall mine according to claim 5 combines the method for mining by the way of filling, which is characterized in that back production institute It states described the second of two step stopes (2) and undercuts layer to include the following steps when higher slice:
(I) the first strip-type entirety retaining wall mine (26) described in shallow bore hole method back production is used, tailings high intensity glue is used after back production Knot filling;
(II) two step stopes (2) described in shallow bore hole method back production are used;
(III) Article 2 banding pattern entirety retaining wall mine (27) described in shallow bore hole method back production is used, tailings high intensity glue is used after back production Knot filling.
8. two step nesting of reserved retaining wall mine according to claim 1 combines the method for mining by the way of filling, which is characterized in that stay in stage casing There are foundation, the foundation to carry out back production after upper stage casing and lower stage casing back production.
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