CN102678121A - Layered top-controlling filling mining method for residual ores in deep hole in diskless area - Google Patents

Layered top-controlling filling mining method for residual ores in deep hole in diskless area Download PDF

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CN102678121A
CN102678121A CN201210157329XA CN201210157329A CN102678121A CN 102678121 A CN102678121 A CN 102678121A CN 201210157329X A CN201210157329X A CN 201210157329XA CN 201210157329 A CN201210157329 A CN 201210157329A CN 102678121 A CN102678121 A CN 102678121A
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ore
top
segmentation
filling
stope
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CN201210157329XA
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CN102678121B (en
Inventor
修国林
李夕兵
杨竹周
赵国彦
李威
王善飞
周韬
彭康
刘志祥
王剑波
何顺斌
杜飞
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山东黄金矿业(莱州)有限公司三山岛金矿
中南大学
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Abstract

The invention discloses a layered top-controlling filling mining method for residual ores in a deep hole in a diskless area. An ore body is divided into ore room ore columns which are arranged at intervals along the travelling direction, and production is preformed by taking 6 to 8 ore room ore columns as a unit; a mountain outer oblique slope, a mountain outer sectional stulm, a sectional contact way and a mountain outer middle-section orepass form a mountain outer rail-free mining preparation system; after bursting and ore falling in medium and deep holes are performed in the ore room ore columns, a part of ores is shoveled out, and the other ores are temporarily left in a stope to form an ore pile of which the top is provided with a hollow top space with the diameter of 1.5 to 2m; a layer of mine body with the thickness of 2.0 to 2.5m is exploited from the ore pile, a 1/4 three-center arc top plate is formed by a control burst method, the out ores are pressed and exploited on the ore pile, and surrounding rocks are crushed on an anchoring rod or an anchoring net supporting and protecting top plate and a long anchoring rope supporting and protecting upper disc; the ores are taken out in a concentrating way after the top is protected, and cement and tailings are glued and filled to a 3.5-4m position; and the steps are repeated until ore blocks are completely stoped and the top is connected and filled. The method has the characteristics of safety, high efficiency, low barren loss, low cost and the like.

Description

Medium-length hole shrink layering control top, no panel afterwards filling mining method

 

Technical field

The invention belongs to the mining technique field, relate to medium-length hole shrink layering control top, a kind of no panel afterwards filling mining method.This method is applicable to that mainly ore body is extremely thick big, and the ore deposit rock is more firm, and requires the metal orebody mining that production capacity is big, efficient is high.

Technical background

Continuous progress and development along with filling technique and trackless equipment; High because of having ore recuperation efficient in the mechanization to the horizontal method of mining by the way of filling and access back-filling method; The top board exposed area is little, is particularly suitable for complicated built on the sand orebody mining and becomes the first-selected mining methods of thick large breaking ore body.The difficulty of ventilating when but above-mentioned two kinds of methods all exist many work planes to work simultaneously, single working surface production efficient is low, labour intensity big, adopt cut that engineering quantity is big, the circulation of mining operation is loaded down with trivial details, the sublayer number causes the stope support engineering quantity big more in the stage casing, waters shortcomings such as many cement of surface layer consumption is big and deficiency.

Summary of the invention

Technical problem to be solved by this invention is; To the defective in panel mechanization upward ut and fill stoping and the access back-filling method, medium-length hole shrink layering control top, a kind of no panel afterwards filling mining method is provided, it is high to have back production efficient; Mining cost is low; Depletion loss rate is little, and labour intensity is low, the characteristics that safety is good.

Technical scheme of the present invention is following:

Medium-length hole shrink layering control top, a kind of no panel afterwards filling mining method is characterized in that:

The ore body across pitch is divided into spaced apart mineral building ore pillar, is unit organization production with 6 ~ 8 groups of mineral building ore pillars;

The high 50m in back production stage casing; Adopting the outer trackless of lower wall arteries and veins to adopt accurate mode exploits from bottom to top: slice drift is arranged on parallel ore body lower wall border; Each slice drift communicates with arteries and veins outslope road through the ramp connecting taxiway; Stope segmentation connection roadway connects stope and each slice drift, and outer ore removal crosscut of arteries and veins and stage casing ore removal drop shaft link, and constitutes the outer trackless of lower wall arteries and veins and adopts Barebone; Tunnel the filling return air raise as return air and filling passage in stope central authorities along the ore body tendency, and a tailgate that communicates with said filling return air raise is set; Adopt the ore removal system of stope segmentation connection roadway+slice drift+stage casing ore pass, ore is promoted to the face of land through vertical shaft or main ramp;

During first substoping, earlier draw web circle on drilling drift to the ore body at mineral building bottom vertical orebody trend, near on web circle 4m place elongate the cable bolting tunnel extremely whole mineral building be wide; In long anchor cable supporting tunnel, utilize long anchor cable on dish protect the top; After protecting the top, utilize shallow intraocular pressure to adopt triangular ore; The medium-length hole ore deposit 9m that falls is adopted in first segmentation in drilling drift, shovel out the part ore after each explosion, and all the other ores persist and in stope, form the top and have the ore deposit heap between the empty head space of 1.5 ~ 2m; Surperficial from last slice drift driving stope segmentation connecting taxiway then to the shrink heap; Go up pressure in the shrink heap and adopt the thick ore body of 2.0 ~ 2.5m; Controlled blasting makes top board form 1/4 basket handle arch, and ore removal is also used bolt support on the shrink heap, simultaneously with coiling top board in the long anchor cable supporting; After protecting the top, concentrate ore removal with scraper, adopt the tailing cemented filling body filling of cement-sand ratio 1:6 ~ 1:8 then, and reserve between the empty head space of 3.5m ~ 4m as the compensation space of segmentation operation and explosion down in first segmentation bottom; Must water surface layer during the filling of per minute section, the cement-sand ratio of watering surface layer is 1:4 ~ 1:6, thickness 0.3 ~ 0.5m.

Subsequent segment back production mode is identical with first segmentation, and directly waters at last sublevel fill stoping and stamp on the surface layer to the vertical centering control deep hole ore deposit that falls; So repeatedly, finishing also until whole mineral building back production, consolidated fill connects the top.

Construct the false end 18 of steel concrete at mineral building and ore pillar first segmentation bottom, bar diameter Φ 12mm, net degree 0.25m * 0.25m, concrete strength are C15, thickness 0.5m,

Good effect of the present invention is:

(1), back production is safe.During medium-length hole shrink layering control top, no panel afterwards filling mining method back production, rock drilling and go out mine order and all under prop, carry out, back production is safe.

(2), the back production cost is low.During back production of the present invention, in the mineral building ore pillar back production segmentation few, few in the bolt support engineering quantity, the filling top dressing is few, the cement consumption is little, the medium-length hole ore deposit explosive specific charge that falls is low, the back production cost is low.

(3), back production efficient is high.The present invention adopts substoping, the medium-length hole ore deposit that falls, and ore removal is concentrated in back, layering control top, and afterwards filling significantly reduces circulating process and the concentration of production, has improved time and usage ratio of equipment greatly, and back production efficient is high.

(4), ore loss ratio is low.Not establishing the panel structure, is unit organization production with adjacent 6 ~ 8 mineral building ore pillars in the nugget, has reduced panel barrier, has reduced the loss late of ore.

Description of drawings

Fig. 1 is the principle schematic of mining methods of the present invention.

Fig. 2 is II-II sectional drawing of Fig. 1.

Fig. 3 is III-III sectional drawing of Fig. 1.

Fig. 4 is IV-IV sectional drawing of Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is further specified.

The technical scheme of mining methods of the present invention is following:

1, along orebody trend nugget is divided into spaced apart mineral building, ore pillar, mineral building, the wide 10m that is of ore pillar; With 6 ~ 8 groups of mineral building ore pillars is the production of exploitation unit organization, does not establish the panel in the nugget, and across pitch is dug up mine continuously, like Fig. 1.

2, the high 50m in back production stage casing, exploitation from bottom to top.Adopt the outer trackless of lower wall arteries and veins to adopt accurate mode; Its technical essential is: slice drift 3 is arranged on parallel ore body lower wall border; Each slice drift 3 communicates with arteries and veins outslope road through the ramp connecting taxiway; Stope segmentation connection roadway 4 connects stope and each slice drift 3, and the outer ore removal crosscut 2 of arteries and veins links with stage casing ore removal drop shaft 1, constitutes the outer trackless of lower wall arteries and veins and adopts Barebone; Tunnel filling return air raise 8 as return air and filling passage in stope central authorities along the ore body tendency, and a tailgate 11 that communicates with said filling return air raise 8 is set.Adopt the ore removal system of stope segmentation connection roadway 4+ slice drift 3+ stage casing ore pass 1, ore 5 is promoted to the face of land through vertical shaft or main ramp, like Fig. 2,3, shown in 4.

3, earlier with 3 ~ 4 synchronous working to the rises of mineral building; During first substoping, earlier draw web circle on drilling drift 14 to the ore body at mineral building bottom vertical orebody trend, near on elongation cable bolting tunnel 10, web circle 4m place wide to whole mineral building; Utilize in long anchor cable supporting tunnel 10 that dish protects the top on 15 pairs of the long anchor cables; After protecting the top, utilize shallow intraocular pressure to adopt triangular ore; The medium-length hole 13 ore deposit 9m that falls is adopted in first segmentation in drilling drift 14, shovel out the part ore after each explosion, and all the other ores persist and in stope, form the top and have the ore deposit heap between the empty head space of 1.5 ~ 2m; Surperficial from last slice drift driving stope segmentation connecting taxiway 3 then to the shrink heap; Go up pressure in the shrink heap and adopt the thick ore body of 2.0 ~ 2.5m; Controlled blasting makes top board form 1/4 basket handle arch, and on shrink heap ore removal and with anchor pole 16 supportings, simultaneously with coiling top board in long anchor cable 15 supportings; After protecting the top, concentrate ore removal with scraper, adopt tailing cemented filling body 6 fillings of cement-sand ratio 1:6 ~ 1:8 then, and reserve between the empty head space of 3.5m ~ 4m as the compensation space of segmentation operation and explosion down in first segmentation bottom; For guaranteeing trackless equipment walking safety and reduce the poor damage of ore that must water surface layer 17 during the filling of per minute section, the cement-sand ratio of watering surface layer 17 is 1:4 ~ 1:6, thickness 0.3 ~ 0.5m.

Subsequent segment back production mode is identical with first segmentation, and directly waters at last sublevel fill stoping and stamp on the surface layer 17 to the vertical centering control deep hole ore deposit that falls; So repeatedly, until whole mineral building back production finish and consolidated fill connect the top, like Fig. 2,3, shown in 4.

4, carry out the back production of adjacent 3 ~ 4 ore pillars after the mineral building back production filling.The pillar recovery method is identical with the mineral building back production, and it is tailing cemented filling body 6 fillings of 1:6 ~ 1:8 that cement-sand ratio is adopted in ore pillar first segmentation, and tailing-filled body 7 fillings are adopted in all the other segmentations.

5, for guaranteeing next stage casing back production safety, improve resource recovery, construct the steel concrete vacation end 18 and reserve the thick fore-set of 3m 9 in first segmentation bottom during back production, the false ends 18 intensity C15 of steel concrete, thickness is 0.5m.

Below will combine the concrete operations instance that the present invention is explained further details:

San-Shan-Dao Gold Mine is the bigger underground gold mine of China's production scale directly under the mining area, production capacity 3500t/d.62 ° of orebody trends, the tendency east southeast,, there is steepening trend gradually at 33 ~ 67 ° at inclination angle by inclination angle, north orientation south by average 46 °.The average thick 30m of ore body, local 60m, the nearly 100m of maximum horizontal thickness.The grade of ore 1.52 ~ 12.53g/t, average 3.26g/t, the at present main back production-following ore body in 400m stage casing.

The practical implementation step is:

1, in the Sanshan Island directly under mining area-555m ~-the 510m stage casing; 35 ° ~ 45 ° at the slanting angle of ore body, ore body average thickness 29m adopts medium-length hole shrink layering control top, no panel afterwards filling mining method; It is mineral building and ore pillar that the ore body across pitch is divided into separation; Mineral building, the wide 10m that is of ore pillar serve as the production of exploitation unit organization with 6 ~ 8 mineral building ore pillars, the high 50m in stage casing.

2, the developing mode of vertical shaft+ramp is adopted in the mine.For cooperating the trackless mechanized mining, arrange that at the ore body lower wall trackless of arteries and veins outslope road+slice drift+concentrated ore removal of segmentation connecting taxiway+stage casing drop shaft is adopted Barebone, every separated 10m is provided with the outer slice drift of an arteries and veins, slice drift and ramp UNICOM; Communicate with stope through the segmentation connecting taxiway, communicate with drop shaft through the ore removal crosscut.Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4.Concrete construction does; At first tunnel transportation lane 12, stage casing; Tunnel ramp then; Press 10m left and right sides Chui Gao driving slice drift 3 at ramp connecting taxiway place along orebody trend, tunnel lower wall stage casing ore removal drop shaft 1 afterwards, vertical orebody trend driving stope segmentation connection roadway 4 is up to ore body lower wall border in slice drift.Ore body divides 5 segmentations in the stage casing, the high 10m of segmentation.

3, nugget adopts mode back production from bottom to top.4 synchronous working to the rises of mineral building in the substoping height 11.5 ~ 12m, nugget.During the mineral building back production, earlier draw web circle on drilling drift 14 to the ore body of 4m * 3.5m (wide * height) at the mineral building first segmentation bottom vertical orebody trend, near on web circle 4m place draw the long anchor cable supporting tunnel 10 of 4m * 3.5m wide to whole mineral building; In long anchor cable supporting tunnel 10 on dish carry out long anchor cable 15 and protect the top; After protecting the top, be the scope of freedom and compensation space, utilize shallow intraocular pressure to adopt triangular ore with drilling drift and long anchor cable supporting tunnel 10; On in drilling drift, adopting to the fan shaped medium length hole ore deposit 9m that falls; Divide 3 separate explosions, preceding twice each explosion 5 ~ 7 round, the onepull of residue ore body; Shovel out the part ore after each explosion, all the other ores persist the shrink that the formation top has between the empty head space of 1.5 ~ 2m in stope and pile; Surperficial from last slice drift driving stope segmentation connecting taxiway 3 then to the shrink heap; Go up pressure in the shrink heap and adopt the thick ore body of 2.0 ~ 2.5m; Controlled blasting makes top board form 1/4 basket handle arch, and on shrink heap ore removal and protect the top with anchor pole or anchor net, with coiling top board in long anchor cable 15 supportings; After protecting the top, concentrate ore removal with scraper, adopt the cement tailing cemented filling of cement-sand ratio 1:6 ~ 1:8 then and reserve between the empty head space of 3.5m ~ 4m as the compensation space of segmentation operation and explosion down in first segmentation bottom; For guaranteeing trackless equipment walking safety and reduce the poor damage of ore that must water surface layer during the filling of per minute section, its cement-sand ratio is 1:4 ~ 1:6, thickness 0.3 ~ 0.5m; Subsequent segment back production mode is identical with first segmentation, and directly on last sublevel fill stoping top dressing, stamps to the vertical centering control deep hole ore deposit that falls; So repeatedly, straight

Finishing also to whole mineral building back production, consolidated fill connects the top.

When 4, mineral building, ore pillar were with the afterwards filling mining method back production of the empty top of no panel shrink layering, its stoping method is: mining preparation work was drawn drilling drift 14 earlier after accomplishing.4 mineral buildings or ore pillar carry out synchronously, establish with the rock drilling of DL330-5 medium-length hole equipment to hit deep hole; The non-electricity millisecond of 2# ammonium nitrate-fuel oil mixture difference blasting cap initiation; ToRo3.5m3 scraper ore removal; Robolt H518 rock bolting jumbo carries out anchor pole and protects the top.The pillar recovery method is all identical with mineral building with mode, the ore pillar first segmentation consolidated fill, and all the other segmentations are tailing-filled.

5,,, improve resource recovery for guaranteeing stope safety for first segmentation; Can construct the false end 18 of steel concrete at mineral building and ore pillar first segmentation bottom; Bar diameter Φ 12mm, net degree 0.25m * 0.25m, concrete strength are C15; Thickness 0.5m is for next stage casing fore-set 9 back production provides security context.

6, substoping is intact, need reserve the empty heights of roofs of 3.5 ~ 4m during each sublevel fill stoping, operation and compensating space in blasting when making next substoping.During the segmentation stope filling; Except that ore pillar second segmentation and above segmentation stope adopt tailing-filled, each segmentation stope of all the other mineral buildings and ore pillar all adopts the ordinary Portland cement tailing cemented filling, the filling proportioning is 1:6 ~ 1:8; For guarantee that trackless equipment is walked safely and minimizing ore poor loss rate on obturation; Require to water surface layer, its thickness 0.3 ~ 0.5m, cement-sand ratio 1:4 ~ 1:6 during the filling of per minute section.

7, carrying out filling before the filling prepares.Construct the filling divider wall earlier, set up filling pipe then, after filling preparation is accomplished, carry out filling again.

Claims (3)

1. medium-length hole shrink layering control top, no panel afterwards filling mining method is characterized in that:
The ore body across pitch is divided into spaced apart mineral building ore pillar, is unit organization production with 6 ~ 8 groups of mineral building ore pillars;
The high 50m in back production stage casing; Adopting the outer trackless of lower wall arteries and veins to adopt accurate mode exploits from bottom to top: slice drift is arranged on parallel ore body lower wall border; Each slice drift communicates with arteries and veins outslope road through the ramp connecting taxiway; Stope segmentation connection roadway connects stope and each slice drift, and outer ore removal crosscut of arteries and veins and stage casing ore removal drop shaft link, and constitutes the outer trackless of lower wall arteries and veins and adopts Barebone; Tunnel the filling return air raise as return air and filling passage in stope central authorities along the ore body tendency, and a tailgate that communicates with said filling return air raise is set; Adopt the ore removal system of stope segmentation connection roadway+slice drift+stage casing ore pass, ore is promoted to the face of land through vertical shaft or main ramp;
During first substoping, earlier draw web circle on drilling drift to the ore body at mineral building bottom vertical orebody trend, near on web circle 4m place elongate the cable bolting tunnel extremely whole mineral building be wide; In long anchor cable supporting tunnel, utilize long anchor cable on dish protect the top; After protecting the top, utilize shallow intraocular pressure to adopt triangular ore; The medium-length hole ore deposit 9m that falls is adopted in first segmentation in drilling drift, shovel out the part ore after each explosion, and all the other ores persist and in stope, form the top and have the ore deposit heap between the empty head space of 1.5 ~ 2m; Surperficial from last slice drift driving stope segmentation connecting taxiway then to the shrink heap; Go up pressure in the shrink heap and adopt the thick ore body of 2.0 ~ 2.5m; Controlled blasting makes top board form 1/4 basket handle arch, and ore removal is also used bolt support on the shrink heap, simultaneously with coiling top board in the long anchor cable supporting; After protecting the top, concentrate ore removal with scraper, adopt the tailing cemented filling body filling of cement-sand ratio 1:6 ~ 1:8 then, and reserve between the empty head space of 3.5m ~ 4m as the compensation space of segmentation operation and explosion down in first segmentation bottom; Must water surface layer during the filling of per minute section, the cement-sand ratio of watering surface layer is 1:4 ~ 1:6, thickness 0.3 ~ 0.5m.
2. subsequent segment back production mode is identical with first segmentation, and directly waters at last sublevel fill stoping and stamp on the surface layer to the vertical centering control deep hole ore deposit that falls; So repeatedly, finishing also until whole mineral building back production, consolidated fill connects the top.
3. medium-length hole shrink layering control top, no panel as claimed in claim 1 afterwards filling mining method; It is characterized in that: construct the false end 18 of steel concrete, bar diameter Φ 12mm, net degree 0.25m * 0.25m at mineral building and ore pillar first segmentation bottom; Concrete strength is C15, thickness 0.5m.
CN201210157329.XA 2012-05-21 2012-05-21 Layered top-controlling filling mining method for residual ores in deep hole in diskless area CN102678121B (en)

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