CN102465704A - Sill pillar-less sublevel caving method for inclined medium-thickness ore body - Google Patents

Sill pillar-less sublevel caving method for inclined medium-thickness ore body Download PDF

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CN102465704A
CN102465704A CN2010105319710A CN201010531971A CN102465704A CN 102465704 A CN102465704 A CN 102465704A CN 2010105319710 A CN2010105319710 A CN 2010105319710A CN 201010531971 A CN201010531971 A CN 201010531971A CN 102465704 A CN102465704 A CN 102465704A
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ore
free
stope
column
hole
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CN102465704B (en
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任凤玉
张晋军
丁航行
杨清平
曹建立
周智春
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CHINA NONFERROUS METAL MINING (GROUP) Co Ltd
Northeastern University China
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CHINA NONFERROUS METAL MINING (GROUP) Co Ltd
Northeastern University China
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Abstract

The invention provides a sill pillar-less sublevel caving method for an inclined medium-thickness ore body. The sill pillar-less sublevel caving method for an inclined medium-thickness ore body comprises the fpllowing steps of carrying out sublevel stoping, finishing rock drilling in an access passage arranged in a vein formation direction, carrying out explosion and carrying out ore removal. The sill pillar-less sublevel caving method for an inclined medium-thickness ore body is characterized in that on each one stoping blast-hole surface, two stoping blast holes located at a side of a footwall of a stope section are communicated with a previous stope section so that a diversion mouth is formed; and other stoping blast holes are communicated with the previous stope section and form a triangular jamb on the top of a side of a hanging wall of the stope section. The sill pillar-less sublevel caving method for an inclined medium-thickness ore body has the advantages that through control of depth of the different stoping blast holes, the triangular jamb is formed on the top of the side of the hanging wall of the stope section so that it is avoided that waste rocks produced in the previous stope section untimely enter into the stope section; and a granule gravity flow of the previous stope section is introduced to the side of the stope section in a primary ore drawing stage and thus the diversion mouth is formed so that broken ore moving and removal conditions are improved and the problem of a large ore loss dilution rate is solved.

Description

A kind of bottom-column-free sectional caving stoping method that is used to tilt middle thickness orebody
Technical field
The present invention relates to metalliferous deposit underground mining technical field, more particularly, the present invention relates to a kind of bottom-column-free sectional caving stoping method that is used to tilt middle thickness orebody.
Background technology
Underground mining method mainly comprises adopts standard, cutting and three basic working procedure of back production, can be divided into openstope method, the method for mining by the way of filling and caved stopes three major types usually.Wherein, But the bottom-column-free sectional caving stoping method in the caved stopes has that safety is good, flexibility is strong, production efficiency is high and advantage such as continuous stoping and be acknowledged as one of best mining methods of exploitation big thick ore body, worldwide is used widely.
At present; For the lower inclination middle thickness orebody of steadiness difference and grade; Because its back production difficulty is bigger; Therefore the unstable characteristic that conventional sublevel open stope method and segmentation afterwards filling method all can not adapt to the ore deposit rock well stope usually occurs and collapses and phenomenon such as emit, and causes the loss and dilution of ore big, production efficiency is low.
Therefore; In order to address the above problem, the someone will arrange along the pulse that the bottom-column-free sectional caving stoping method of extracting drift introduces in the exploitation of inclination middle thickness orebody that lower wall contains unstable rock stratum, through parameters optimization; Solved and adopted collapsing of accurate engineering and emit a difficult problem; Realize the ordinary production of stope, reduced mining cost to a certain extent, improved production efficiency.But bottom-column-free sectional caving stoping method does not still solve the big problem of ore losses dilution effectively, and its reason is:
At first, as shown in Figure 1, through finding to movement law research of avalanche ore deposit rock; Being positioned at ore directly over the mine mouth 101, to move down speed than the ore of both sides fast; Promptly As time goes on, the trend that moves down of ore 102 again to 102c, forms the shape of similar funnel from 102a to 102b.Thereby form the residual body 103 of ore that to emit in the ore drawing later stage.
Second; As shown in Figure 2; For inclined orebody 201, web wall 205 has guide functions on it, thus make the covering layer barren rock 202 be positioned at the segmentation stope can arrive out at faster speed under its guiding mine mouth 204 above (i.e. path 203 shown in Figure 2, edge).Like this, the barren rock 202 that moves down is sneaked in the ore going out mine mouth 204, causes the ore losses dilution big; Simultaneously, the barren rock 202 that moves down has also stopped the proper flow of lower wall side 206 broken ores, causes the further increasing of ore losses dilution.
In addition; Because the inclination angle of inclined orebody is not enough (being generally 30 ~ 55 degree); Most of broken ore for once reclaims chance, causes a large amount of lower wall side broken ores to emit, thus form in the stope the bigger residual body of lower wall (as Fig. 2 207 shown in) cause permanent loss.If digging lower wall rock then when can emitting the residual ore of part lower wall, need be emitted a large amount of barren rocks again, thereby not only increased the rate of dilution of emitting ore, also increased mining cost.
Therefore, be necessary existing bottom-column-free sectional caving stoping method is improved,, solve the big problem of ore losses dilution, improve the exploitation effect of bottom-column-free sectional caving stoping method in the inclination middle thickness orebody effectively with when not increasing mining cost.
Summary of the invention
In the summary of the invention part, introduced the notion of a series of reduced forms, this will further explain in specific embodiment part.Summary of the invention part of the present invention does not also mean that key feature and the essential features that will attempt to limit technical scheme required for protection, does not more mean that the protection domain of attempting to confirm technical scheme required for protection.
To the problem that exists in the above-mentioned prior art; The present invention provides a kind of bottom-column-free sectional caving stoping method that is used to tilt middle thickness orebody; Comprise substoping, accomplish rock drilling, explosion and ore removal along the pulse in the route; Wherein: at each back production hole packed plane; Two back production big guns of lower wall side portion hole of this segmentation stope is set to collapse to form flow-guiding mouth with last segmentation stope, and all the other back production big gun holes are set to all not collapse with dish side roof part formation ore pillar on said segmentation stope with the said segmentation stope of going up.
Further, at the bottom of the hole in said all the other back production big gun holes to the said distance that goes up segmentation stope border less than burden.
Further, be slightly less than 0.7755 times burden at the bottom of the hole in said all the other back production big gun holes to the said distance that goes up segmentation stope border.
Further, said ore pillar is the triangular stump that is positioned at dish side on said the segmentation stope top.
Further, the height of said triangular stump is 3 ~ 4 meters.
Further, the base width of said triangular stump is 7 ~ 8 meters.
Further, said triangular stump base is the arc that raises up, and the radius of curvature of said arc is selected from 1 ~ 1.5 times of height of lift.
Further, the distance between at the bottom of the hole in said limit portion two back production big guns hole is more than 1 meter.
Further, ore caving interval is more than 1.5 meters.
Further, the last web angle of spot hole in said back production big gun hole is 50 ~ 55 degree.
Further, the rock drilling center of drift is respectively to the horizontal range L and the height of lift H on the lower wall border of said inclination middle thickness orebody:
,
Wherein, LUnit be rice; The unit of H is a rice; BBe the horizontal breadth of said inclination middle thickness orebody, unit is a rice; αBe the lower wall inclination angle of said inclination middle thickness orebody, unit degree of being; βBe that a prose style free from parallelism is emitted the angle, unit degree of being.
Further, a said prose style free from parallelism is emitted the angle βBe 65 ~ 68 degree.
Further, said lower wall inclination angle αBe 45 ~ 55 degree.
In sum; The bottom-column-free sectional caving stoping method that is used to tilt middle thickness orebody provided by the invention; Through controlling the degree of depth in different back production big guns hole, the dish side forms triangular stump on this segmentation stope, thereby the barren rock that can prevent the segmentation stope is sneaked into this segmentation stope too early; And will go up segmentation stope prose style free from parallelism gravity current is guided stope at the ore drawing initial stage lower wall side; Form flow-guiding mouth in the lower wall side, improve the mobile of broken ore and emit condition, thereby solved the big problem of ore losses dilution effectively.Further, the dish triangular stump of going up of reservation plays guide functions at the ore drawing initial stage, can by this step pitch or next step is apart from recovery behind ore removal later stage natural caving.Simultaneously; Through the computation model that combines experimental data to draw; Can confirm best digging rock height, the rational position and the rational height of lift of extracting drift along the pulse according to the characteristic of different ore bodies; To stay the measure of triangular stump, lower wall water conservancy diversion to organically combine, the big phenomenon of ore losses dilution of exploitation inclination middle thickness orebody is effectively controlled with last dish.
Description of drawings
Attached drawings of the present invention is used to understand the present invention at this as a part of the present invention.Embodiments of the invention and description thereof have been shown in the accompanying drawing, have been used for explaining principle of the present invention.In the accompanying drawings,
Shown in Figure 1 is the sketch map of the movement law of avalanche ore deposit rock;
Shown in Figure 2 is the sketch map of movement law of the avalanche ore deposit rock of inclined orebody;
Shown in Figure 3 for being used to tilt the stope structure sketch map of the bottom-column-free sectional caving stoping method of middle thickness orebody according to the preferred embodiment of the present invention;
Shown in Figure 4 for being used to tilt the flow chart of the bottom-column-free sectional caving stoping method of middle thickness orebody according to the preferred embodiment of the present invention.
The specific embodiment
In the description hereinafter, a large amount of concrete details have been provided so that more thorough understanding of the invention is provided.Yet, it will be apparent to one skilled in the art that the present invention can need not one or more these details and be able to enforcement.In other example,, describe for technical characterictics more well known in the art for fear of obscuring with the present invention.
In order thoroughly to understand the present invention, detailed structure and step will be proposed, in following description so that explanation the present invention is a kind of bottom-column-free sectional caving stoping method that is used to tilt middle thickness orebody.Obviously, execution of the present invention is not limited to the specific details that the technician had the knack of of field of mining.Preferred embodiment of the present invention is described in detail as follows, yet except these were described in detail, the present invention can also have other embodiments.
[preferred implementation]
Specify the bottom-column-free sectional caving stoping method that is used to tilt middle thickness orebody according to the preferred embodiment of the present invention below in conjunction with Fig. 3 and Fig. 4.Shown in Figure 3 is the stope structure sketch map of the bottom-column-free sectional caving stoping method that is used to tilt middle thickness orebody of the preferred embodiment for the present invention; Shown in Figure 4 for being used to tilt the flow chart of the bottom-column-free sectional caving stoping method of middle thickness orebody according to the preferred embodiment of the present invention.
As shown in Figure 3, the last segmentation stope 302 of inclination middle thickness orebody 301 has been exploited and has been finished, and covering layer barren rock 303 is left in the tcrude ore location.
In the recovery process of this segmentation stope 304; When arranging the back production big gun hole of this step pitch; Two back production big gun hole 306a of limit portion and 306b near the lower wall side 305 of this segmentation stope 304 are set to collapse to form flow-guiding mouth with last segmentation stope 302, and all the other back production big gun holes are set to all not collapse with dish side 307 tops on this segmentation stope 304 with last segmentation stope 302 form ore pillar 308.
As an example, in order to collapse this segmentation stope 304 and last segmentation stope 302, when explosion, can arrive the border of segmentation stope 302 at the bottom of the hole of two back production big gun hole 306a of limit portion of needs and 306b.Therefore, contact with last segmentation stope 302 at the bottom of the hole of two back production big gun hole 306a of limit portion of needs and 306b; Certain at interval distance perhaps and between the border of last segmentation stope 302; For example below 1 meter; Be preferably 0.5 meter, more preferably, at the bottom of the hole of said two back production big gun hole 306a of limit portion and 306b and the distance between the border of last segmentation stope 302 less than burden; For example, be slightly less than 0.7755 times burden.
As an example; The size of said flow-guiding mouth (promptly; Distance between at the bottom of the hole of two back production big gun hole 306a of limit portion and 306b) to suit; Moving down of the too big then uncontrollable covering layer barren rock 303 of size, the too little covering layer barren rock 303 that then can't guarantee can flow along lower wall 305, thereby can't reach the purpose of water conservancy diversion.Therefore, the size of said flow-guiding mouth (distance between at the bottom of the hole of two back production big gun hole 306a of limit portion and 306b) is generally more than 1 meter, be preferably more than 2 meters, and for example be 2.3 ~ 2.6 meters.
As an example; For ore pillar 308 is formed on dish side 307 tops on this segmentation stope 304; Need when explosion, all can not arrive at the bottom of the hole of all the other back production big gun hole 306c the border of segmentation stope 302, therefore, need at least all not contact at the bottom of the hole of all the other back production big gun hole 306c with said border of going up segmentation stope 302; And in order after explosion, to leave ore pillar 308; Need to leave certain distance at the bottom of the hole of all the other back production big gun hole 306c and between the border of last segmentation stope 302, for example more than 1 meter, its concrete numerical value can be selected according to the Rational Parameters such as desired size of ore body character, big gun hole size, hole charge, ore pillar 308.
Through above-mentioned measure, can slow down the barren rock of going up the segmentation stope and sneak into this segmentation stope too early, and can strengthen the flowability of lower wall side broken ore.
Need to prove, form ore pillar, just can reach the object of the invention as long as can on this segmentation stope, coil side.But in order to save time and to reduce the exploitation difficulty, preferably the dish side forms triangular stump on this segmentation stope.Certainly, the triangle ore pillar can also for example be other shapes of rhombus or irregular shape etc., and this is understandable to those skilled in the art.Therefore, below only be described in detail to triangular stump, this is not construed as limiting the invention.
Under preferred situation; Remove two back production big gun hole 306a of limit portion and 306b; And extend to outside the upward dish side portion back production big gun hole 306d of dish lateral edges on the ore body, the line at the bottom of the hole of all the other back production big gun hole 306c can be similar to the level of being in to form triangular stump 308.Under preferred situation, the line at the bottom of the hole of said all the other back production big gun hole 306c can be the arc that raises up so that reclaim said triangular stump 308.Under normal conditions, the radius of curvature of the line at the bottom of the hole of said all the other back production big gun hole 306c is by the property the emitted decision of this ore pillar 308, when the easy inbreak of ore pillar 308, then takes bigger radius of curvature; Otherwise, take less radius of curvature.Preferably, said radius of curvature is got the multiple of height of lift usually.For example, for the medium ore body of steadiness, said radius of curvature can be taken 1 ~ 1.5 times of height of lift, for example 1.2 times.It is understandable that the line at the bottom of the hole of all the other back production big gun hole 306c can also be other shapes except that straight line.
As an example, the size of said triangular stump 308 is confirmed according to the actual conditions of ore body.Under normal conditions, the vertical height of triangular stump 308 is mainly confirmed by the ore body steadiness: if the ore body steadiness is better, then the vertical height of triangular stump 308 can be got smaller value; Otherwise need get higher value.The base width of triangular stump 308 (that is, the horizontal range on base) is mainly confirmed by the horizontal breadth of ore body 301 and the size of flow-guiding mouth: if the horizontal breadth of ore body 301 is bigger, then the base width of triangular stump 308 can be got higher value; Otherwise get smaller value.The base width is less than the horizontal breadth of ore body 301.Usually, the size of triangular stump 308 can not be excessive, so that in this step pitch or next step distance, reclaim, reduces unnecessary ore losses; The size of triangular stump 308 can not be too small, otherwise can't play good mitigation.Preferably, when the horizontal breadth of ore body 301 was 10 ~ 13 meters, the vertical height of triangular stump 308 was 3 ~ 4 meters, and the base width is 7 ~ 8 meters or less than 2 ~ 3 meters of ore body horizontal breadths.
Further, the size of back production big gun hole array pitch can be confirmed according to the direction that system power and back production shot hole blasting are pressed from both sides in explosion.For example, when the horizontal breadth of ore body 301 was 6 ~ 15 meters, ore caving interval can be preferably more than 2 meters for more than 1.5 meters, for example 2.0 ~ 2.8 meters; The lateral opening angle of lower wall in back production big gun hole can be 60 ~ 75 degree, and being preferably 65 ~ 70 degree, going up the web angle of spot hole can be 50 ~ 55 degree.
As an example, can adopt the mode Drilling back production big gun hole of gradation rock drilling.But preferably,, can also adopt under the condition that the route steadiness allows along the pulse and concentrate the disposable back production big gun hole of mode of rock drilling all to cut a hole stope for improving rock penetration performance.Need to prove, can also adopt other mode Drilling back production big gun holes.
Further, do not go to pot in order to protect open wiring, the aperture that should rationally confirm back production big gun hole is loaded length not.Preferably, the aperture not loaded length be set to 1.5m or 3m.And, adopt the length mode of not powder charge at interval in aperture between the different back production big guns hole of same row's face.
Further, in order to obtain good effect, the horizontal breadth of ore body 301 is preferably 4 ~ 15 meters, more preferably is 6 ~ 15 meters; The lower wall inclination angle is preferably 30 ~ 55 degree, more preferably is 45 ~ 55 degree; Stope length is preferably 80 ~ 120 meters.In addition, in order to shorten the ore removal distance, can also be employed in the stope two ends and open cutting groove, join the lane to the centre and move back multiple back production mode such as adopt.
In actual recovery process,, from above-mentioned parameter, select rational numerical can realize the object of the invention according to the actual conditions of ore body.
In order to obtain better effect, can also be to the position and the height of lift of route are provided with along the pulse.
As an example, can confirm the rock drilling center of drift horizontal range L and height of lift H through setting up following model to ore body lower wall border:
,
Wherein, LUnit be rice; The unit of H is a rice; BBe the ore body horizontal breadth, unit is a rice; αBe the lower wall inclination angle, unit degree of being; βBe that an ore prose style free from parallelism is emitted the angle, unit degree of being.Under preferred situation, height of lift is 8 ~ 10 meters, and ore body lower wall inclination angle is 45 ~ 55 degree, and an ore prose style free from parallelism is emitted the angle βBe between 65 ~ 68 degree.
With the Chambishi copper mine is example, and the horizontal breadth of the ore body of Chambishi copper mine is 6 ~ 15 meters, and the lower wall inclination angle is 40 ~ 55 degree, and it is 8 ~ 10 meters that mining type adopts height of lift, and route digging rock height (counting from the route base plate) is 6 ~ 8 meters along the pulse.Can draw through experiment, the ore recuperation degree that adopts bottom-column-free sectional caving stoping method of the present invention to exploit can be up to 75% ~ 85%, and ore dilution rate is merely 18 ~ 30%.
Specify the step of the bottom-column-free sectional caving stoping method that is used to tilt middle thickness orebody according to the preferred embodiment of the present invention below with reference to Fig. 4.
At first, in step S401, confirm the size of triangular stump and the size of flow-guiding mouth.
The size of triangular stump and the size of flow-guiding mouth are confirmed according to the actual conditions of ore body.
As an example, the vertical height of triangular stump is mainly confirmed by the ore body steadiness: if the ore body steadiness is better, then the vertical height of triangular stump can be got smaller value; Then need get higher value if steadiness is relatively poor.The base width of triangular stump (that is, the horizontal range on base) mainly determines that by the horizontal breadth of ore body and the size of flow-guiding mouth if the horizontal breadth of ore body is bigger, then the base width of triangular stump can be got higher value; Otherwise get smaller value.The base width is less than the horizontal breadth of ore body 301.Usually, the size of triangular stump can not be excessive, otherwise can't in this step pitch or next step distance, reclaim, and causes damage; The size of triangular stump can not be too small, otherwise can't play good barrier effect.Preferably, when the ore body horizontal breadth was 10 ~ 13 meters, the vertical height of triangular stump was 3 ~ 4 meters, and the base width is 7 ~ 8 meters or less than 2 ~ 3 meters of ore body horizontal breadths.
Under preferred situation, the base of triangular stump can be the arc that raises up so that reclaim said triangular stump.Generally, the radius of curvature of said arc is then taken bigger radius of curvature by the property the emitted decision of this ore pillar when the easy inbreak of ore pillar; Otherwise, take less radius of curvature.Preferably, said radius of curvature is got the multiple of height of lift usually.For example, for the medium ore body of steadiness, said radius of curvature can be taken 1 ~ 1.5 times of height of lift, for example 1.2 times.
As an example; The size of said flow-guiding mouth (that is, the distance between at the bottom of the hole in two limit portion back production big gun holes) will suit, and size is moving down of big then uncontrollable covering layer barren rock too; The too little covering layer barren rock that then can't guarantee can flow along lower wall, thereby can't reach the purpose of water conservancy diversion.Therefore, the size of said flow-guiding mouth (that is, the distance between at the bottom of the hole in two limit portion back production big gun holes) is generally more than 1 meter, is preferably more than 2 meters for example 2.3 ~ 2.6 meters.
Then, in step S402, confirm the position and the degree of depth in back production big gun hole.
In order to obtain flow-guiding mouth and triangular stump; In the recovery process of this segmentation stope; When arranging the back production big gun hole of this step pitch; For collapsing to form flow-guiding mouth with last segmentation stope, all the other back production big gun holes are set to all not collapse with dish side roof part on this segmentation stope with last segmentation stope form ore pillar near two limit portion back production big gun holes of the lower wall side of this segmentation stope.
As an example, in order to collapse this segmentation stope and last segmentation stope, when explosion, can arrive the border of segmentation stope at the bottom of the hole in two limit portion back production big gun holes of needs; Therefore, need to contact with last segmentation stope at the bottom of the hole in two limit portion back production big gun holes the certain distance in interval perhaps and between the border of last segmentation stope; For example below 1 meter; Be preferably 0.5 meter, more preferably, at the bottom of the hole in said two limit portion back production big gun holes and the distance between the border of last segmentation stope be slightly less than burden; For example, be slightly less than 0.7755 times burden.
As an example; For dish side roof part on this segmentation stope forms ore pillar; Need when explosion, all can not arrive at the bottom of the hole in all the other back production big gun holes the border of segmentation stope, therefore, need at least all not contact at the bottom of the hole in all the other back production big gun holes with said border of going up the segmentation stope; And in order after explosion, to leave ore pillar; Need to leave certain distance at the bottom of the hole in all the other back production big gun holes and between the border of last segmentation stope, for example more than 1 meter, its concrete numerical value can be selected according to Rational Parameters such as ore body character, big gun hole size, hole charges.
Further, the size of back production big gun hole array pitch can be confirmed according to the direction that system power and back production shot hole blasting are pressed from both sides in explosion.For example, when the horizontal breadth of ore body was 6 ~ 15 meters, ore caving interval can be preferably more than 2 meters for more than 1.5 meters, for example 2.0 ~ 2.8 meters; The lateral opening angle of lower wall in back production big gun hole can be 60 ~ 75 degree, and being preferably 65 ~ 70 degree, going up the web angle of spot hole can be 50 ~ 55 degree.
Then, in step S403, explosive is also loaded to carry out explosion and exploitated ore in Drilling big gun hole.
As an example, can adopt the mode Drilling back production big gun hole of gradation rock drilling.But preferably,, can also adopt under the condition that the route steadiness allows along the pulse and concentrate the disposable back production big gun hole of mode of rock drilling all to cut a hole stope for improving rock penetration performance.Need to prove, can also adopt other mode Drilling back production big gun holes.
Further, do not go to pot in order to protect open wiring, the aperture that should rationally confirm back production big gun hole is loaded length not.Preferably, filling length in aperture is set to 1.5m or 3m.And, adopt the length mode of not powder charge at interval in aperture between the back production big gun hole of same row's face.
At last, in step S404, reclaim triangular stump.
As an example, in the ore removal later stage, can in the ore removal process of this step pitch or next step distance, reclaim the triangular stump of natural caving.
Under preferred situation; Before carrying out step S401; Can also be to according to the concrete condition of waiting to exploit ore body of exploring in early days; Confirm horizontal range L and the height of lift H of the rock drilling center of drift, to combine to come optimum realization the object of the invention with all the other parameters to ore body lower wall border.Particularly, the rock drilling center of said drift can be confirmed through following formula respectively to the horizontal range L and the height of lift H on ore body lower wall border:
,
Wherein, LUnit be rice; The unit of H is a rice; BBe the ore body horizontal breadth, unit is a rice; αBe the lower wall inclination angle, unit degree of being; βBe that an ore prose style free from parallelism is emitted the angle, unit degree of being.Under preferred situation, height of lift is 8 ~ 10 meters, and ore body lower wall inclination angle is 45 ~ 55 degree, and an ore prose style free from parallelism is emitted the angle βBe 65 ~ 68 degree.
The present invention is illustrated through the foregoing description, but should be understood that, the foregoing description just is used for for example and illustrative purposes, but not is intended to the present invention is limited in the described scope of embodiments.It will be appreciated by persons skilled in the art that in addition the present invention is not limited to the foregoing description, can also make more kinds of variants and modifications according to guidance of the present invention, these variants and modifications all drop in the present invention's scope required for protection.Protection scope of the present invention is defined by appended claims book and equivalent scope thereof.

Claims (13)

1. bottom-column-free sectional caving stoping method that is used to tilt middle thickness orebody; Comprise substoping, accomplish rock drilling, explosion and ore removal along the pulse in the route; It is characterized in that: at each back production hole packed plane; Two back production big guns of lower wall side portion hole of this segmentation stope is set to collapse to form flow-guiding mouth with last segmentation stope, and all the other back production big gun holes are set to all not collapse with dish side roof part formation ore pillar on said segmentation stope with the said segmentation stope of going up.
2. bottom-column-free sectional caving stoping method according to claim 1 is characterized in that, the extremely said distance that goes up segmentation stope border is less than burden at the bottom of the hole in said all the other back production big gun holes.
3. bottom-column-free sectional caving stoping method according to claim 2 is characterized in that, the extremely said distance that goes up segmentation stope border is slightly less than 0.7755 times burden at the bottom of the hole in said all the other back production big gun holes.
4. bottom-column-free sectional caving stoping method according to claim 1 is characterized in that, said ore pillar is the triangular stump that is positioned at dish side on said the segmentation stope top.
5. bottom-column-free sectional caving stoping method according to claim 4 is characterized in that, the vertical height of said triangular stump is 3 ~ 4 meters.
6. bottom-column-free sectional caving stoping method according to claim 4 is characterized in that, the base width of said triangular stump is 7 ~ 8 meters.
7. bottom-column-free sectional caving stoping method according to claim 4 is characterized in that, said triangular stump base is the arc that raises up, and the radius of curvature of said arc is selected from 1 ~ 1.5 times of height of lift.
8. bottom-column-free sectional caving stoping method according to claim 1 is characterized in that, the distance between at the bottom of the hole in said limit portion two back production big guns hole is more than 1 meter.
9. bottom-column-free sectional caving stoping method according to claim 1 is characterized in that, ore caving interval is more than 1.5 meters.
10. bottom-column-free sectional caving stoping method according to claim 1 is characterized in that, the last web angle of spot hole in said back production big gun hole is 50 ~ 55 degree.
11. bottom-column-free sectional caving stoping method according to claim 1 is characterized in that, the rock drilling center of drift is respectively to the horizontal range L and the height of lift H on the lower wall border of said inclination middle thickness orebody:
,
Wherein, LUnit be rice; The unit of H is a rice; BBe the horizontal breadth of said inclination middle thickness orebody, unit is a rice; αBe the lower wall inclination angle of said inclination middle thickness orebody, unit degree of being; βBe that a prose style free from parallelism is emitted the angle, unit degree of being.
12. bottom-column-free sectional caving stoping method according to claim 11 is characterized in that, a said prose style free from parallelism is emitted the angle βBe 65 ~ 68 degree.
13. bottom-column-free sectional caving stoping method according to claim 11 is characterized in that, said lower wall inclination angle αBe 45 ~ 55 degree.
CN201010531971.0A 2010-11-04 2010-11-04 Sill pillar-less sublevel caving method for inclined medium-thickness ore body Expired - Fee Related CN102465704B (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
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CN103670412A (en) * 2013-12-11 2014-03-26 西安建筑科技大学 Mined-out area processing and de-stressed mining method for mining steep deposits
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CN105261291A (en) * 2015-11-20 2016-01-20 西安科技大学 Ore drawing experiment model employing caving mining method
CN106321104A (en) * 2016-08-31 2017-01-11 安徽开发矿业有限公司 Loss-free dilution-free cut slot stoping technology
CN106761745A (en) * 2017-03-06 2017-05-31 长沙矿山研究院有限责任公司 The outer sublevel open stope method of arteries and veins
CN107587889A (en) * 2017-08-30 2018-01-16 玉溪大红山矿业有限公司 A kind of construction method worn arteries and veins cutting groove and cross chamber reinforcing bar open wiring mouth
CN107687339A (en) * 2017-09-14 2018-02-13 南华大学 A kind of efficient mining methods of Media thick and rake ore body
CN108049870A (en) * 2018-01-10 2018-05-18 鞍钢集团矿业有限公司 The induction caving mining methods of high-dipping middle thickness orebody of the upper disk containing unstable rock stratum
CN108398235A (en) * 2018-03-20 2018-08-14 东北大学 A kind of adjustable gently inclined medium thick orebody ore drawing experimental rig
CN109098716A (en) * 2018-08-22 2018-12-28 南华大学 A kind of high-dipping ore block safety and high efficiency technology
CN112377191A (en) * 2020-11-10 2021-02-19 东北大学 Inclined sectioning and subsection caving method, stope structure and application

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CN103527200A (en) * 2013-10-25 2014-01-22 河北省矾山磷矿有限公司 Sill-pillar-free sublevel rhombus room subsequent filling mining method
CN103527200B (en) * 2013-10-25 2015-12-09 河北省矾山磷矿有限公司 Bottom-column-free sectional Rhombic room afterwards filling mining method
CN103696769A (en) * 2013-12-06 2014-04-02 西北矿冶研究院 Overhand shrinkage spaced-loading split-blasting slot cutting method
CN103670412A (en) * 2013-12-11 2014-03-26 西安建筑科技大学 Mined-out area processing and de-stressed mining method for mining steep deposits
CN103670412B (en) * 2013-12-11 2016-01-20 西安建筑科技大学 A kind of Mined-out Area control of high-dipping ore block exploitation and Depressurized mining method
CN104234717A (en) * 2014-07-31 2014-12-24 昆明理工大学 Inclined diagonal sublevel open stoping method
CN104234717B (en) * 2014-07-31 2016-04-20 昆明理工大学 A kind of inclination diagonal angle sublevel open stoping mining methods
CN105261291A (en) * 2015-11-20 2016-01-20 西安科技大学 Ore drawing experiment model employing caving mining method
CN105261291B (en) * 2015-11-20 2017-11-03 西安科技大学 A kind of Ore Drawing for Caving Method experimental model
CN106321104A (en) * 2016-08-31 2017-01-11 安徽开发矿业有限公司 Loss-free dilution-free cut slot stoping technology
CN106761745A (en) * 2017-03-06 2017-05-31 长沙矿山研究院有限责任公司 The outer sublevel open stope method of arteries and veins
CN106761745B (en) * 2017-03-06 2019-04-09 长沙矿山研究院有限责任公司 The outer sublevel open stope method of arteries and veins
CN107587889A (en) * 2017-08-30 2018-01-16 玉溪大红山矿业有限公司 A kind of construction method worn arteries and veins cutting groove and cross chamber reinforcing bar open wiring mouth
CN107587889B (en) * 2017-08-30 2019-03-19 玉溪大红山矿业有限公司 A kind of construction method worn arteries and veins cutting groove and cross chamber reinforcing bar open wiring mouth
CN107687339A (en) * 2017-09-14 2018-02-13 南华大学 A kind of efficient mining methods of Media thick and rake ore body
CN108049870A (en) * 2018-01-10 2018-05-18 鞍钢集团矿业有限公司 The induction caving mining methods of high-dipping middle thickness orebody of the upper disk containing unstable rock stratum
CN108049870B (en) * 2018-01-10 2019-03-29 鞍钢集团矿业有限公司 The induction caving mining methods of high-dipping middle thickness orebody of the upper disk containing unstable rock stratum
CN108398235A (en) * 2018-03-20 2018-08-14 东北大学 A kind of adjustable gently inclined medium thick orebody ore drawing experimental rig
CN109098716A (en) * 2018-08-22 2018-12-28 南华大学 A kind of high-dipping ore block safety and high efficiency technology
CN112377191A (en) * 2020-11-10 2021-02-19 东北大学 Inclined sectioning and subsection caving method, stope structure and application

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