CN106593448A - Mining method for surface coal mine - Google Patents

Mining method for surface coal mine Download PDF

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Publication number
CN106593448A
CN106593448A CN201611183026.XA CN201611183026A CN106593448A CN 106593448 A CN106593448 A CN 106593448A CN 201611183026 A CN201611183026 A CN 201611183026A CN 106593448 A CN106593448 A CN 106593448A
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China
Prior art keywords
mining area
coal mine
recovery
distance
mining
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Granted
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CN201611183026.XA
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Chinese (zh)
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CN106593448B (en
Inventor
马力
张宝卫
马占
马占一
周永利
罗怀廷
肖双双
彭洪阁
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China University of Mining and Technology CUMT
China Shenhua Energy Co Ltd
Xian University of Science and Technology
Shenhua Zhungeer Energy Co Ltd
Original Assignee
China University of Mining and Technology CUMT
China Shenhua Energy Co Ltd
Xian University of Science and Technology
Shenhua Zhungeer Energy Co Ltd
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Application filed by China University of Mining and Technology CUMT, China Shenhua Energy Co Ltd, Xian University of Science and Technology, Shenhua Zhungeer Energy Co Ltd filed Critical China University of Mining and Technology CUMT
Priority to CN201611183026.XA priority Critical patent/CN106593448B/en
Publication of CN106593448A publication Critical patent/CN106593448A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C47/00Machines for obtaining or the removal of materials in open-pit mines

Abstract

The invention discloses a mining method for a surface coal mine. The mining method for the surface coal mine comprises the steps that (1) the following distance between an internal soil discharging area and a mining area is increased, so that a reserved space is formed; (2) advancing is conducted in the mining area, so that a first working slope and two parallel first end slopes are formed, the first working slope comprises a step, and when the distance between the first end slopes is larger than the horizontal length of the slope ramp of the step, the first working slope is arranged in the inclination direction of an ore deposit, and the mining area advances in the direction of the ore deposit; and (3) extending towards the lower layer of the mining area is carried out, a second working slope and two parallel second end slopes are formed in the mining area and the reserved space, the second working slope comprises a step, and when the distance between the first end slopes is smaller than the horizontal length of the slope ramp of the step, the second working slope is arranged in the direction of the ore deposit, and the mining area advances in the inclination direction of the ore deposit. According to the mining method for the surface coal mine, rapid soil discharging is achieved in the narrow and long surface coal mine with multiple oblique coal seams, selective mining is easy, and the coal-rock mixing degree is decreased.

Description

The recovery method of open coal mine
Technical field
The present invention relates to Opencut coal mine mining technical field, more particularly, to a kind of recovery method of open coal mine.
Background technology
Under the influence of by factors such as open coal mine storage of mineral deposits feature, production capacity and mine workline lengths, select Suitable active line arrangement is significant to mining production.The active line arrangement of surface mining includes moving towards cloth Put, be inclined to arrangement, moving towards that subregion is vertical to be adopted, be inclined to that subregion is horizontal to be adopted, foundation ditch arrangement and fan-shaped arrange.Wherein, most typically and outdoor Most widely used in colliery is to move towards to arrange and be inclined to arrangement.
Move towards arrangement and refer to that active line moves towards arrangement and to tendency propulsion along mineral deposit, advantage is that workline length is big, is easy to Equipment gives full play to efficiency, reduces coal petrography severity of mixing up and be easy to choosing adopting, but, long active line can increase in Automobile Transportation The distance of casting, reduces the speed of In-pit dumping.Tendency arrangement refers to that tendency of the active line along mineral deposit is arranged and to propulsion is moved towards, is fitted For high-dipping ore block, advantage be facilitate Automobile Transportation and stripping-to-ore ratio change it is little, be also convenient for carrying out In-pit dumping, but, work Help and can produce serious coal petrography mixed questions, cause ore dilution loss.
For the long narrow open coal mine of multiple seam is inclined, in exploitation, arrangement active line can be inclined to, so as to quick real Existing In-pit dumping.But, gradually shorten as active line develops to deep, adopt extremely to opening up arrangement of conveying system and coal seam choosing It is unfavorable.
It is, therefore, desirable to provide a kind of suitable recovery method for inclining the long narrow open coal mine of multiple seam, solves the above problems.
The content of the invention
In view of this, it is an object of the invention to propose a kind of recovery method of open coal mine, solve the work of colliery bottom The problem that line is short and arrangement of conveying system space is little so that inclining the long narrow open coal mine of multiple seam can be quick in recovery process In-pit dumping is realized, to reduce cost of transportation, it is easy to which choosing is adopted, reduce coal petrography severity of mixing up, it is ensured that the safe and efficient production in mine.
A kind of recovery method of the open coal mine provided based on the above-mentioned purpose present invention, including:
(1) the follow-up distance for extending between the In-pit dumping area and the mining area forms headspace;
(2) advance in the mining area and form the opposing parallel first ends side of the first working pit edge and two, described first Working pit edge includes step, when the distance between first end side is more than the horizontal length of the ramp of the step, described the One working pit edge arranges that along the tendency direction in mineral deposit the mining area is advanced to the direction of moving towards in the mineral deposit;
(3) to mining area's deepening described in lower floor, formed in the mining area and the headspace the second working pit edge and Two opposing parallel second ends sides, second working pit edge include the step, when the distance between first end side it is little In the horizontal length of the ramp of the step, second working pit edge is arranged along the direction of moving towards in the mineral deposit, described The tendency direction propulsion of the mining area to the mineral deposit.
Preferably, the method for extending follow-up distance includes:The delayed internal dumping is to the stope with progress.
Preferably, also include in step (2) and/or step (3):The horizontal length of the ramp is that the step is high 8~12.5 times of degree.
Preferably, also include in step (3):The direction of propulsion of first working pit edge is pushed away with second working pit edge Enter direction to be mutually perpendicular to.
Preferably, also included before step (3):To mining area's deepening described in lower floor, repeat step (2), to described the Horizontal length of the distance between one end side less than the ramp of the step, into step (3).
Preferably, the recovery method also includes step (4), to mining area's deepening described in lower floor, repeat step (3), directly To being advanced into boundary.
Furthermore it is preferred that the recovery method also includes:When the distance between first end side is equal to the step The horizontal length of ramp, can enter step (2) or step (3).
From the above it can be seen that the recovery method of the open coal mine of present invention offer, compared with prior art, has Advantages below:In mining area's use tendency arrangement exploitation that upper strata is relatively open, along propulsion is moved towards, so as to realize Quick casting, reduces cost of transportation;In the mining area that lower floor is relatively narrow, active line can be increased by arranging headspace Length, while using arrangement exploitation is moved towards, along tendency propulsion, can solve the problem that colliery bottom active line is short, developing transport The problem of system difficult arrangement, while can also improve choosing adopts ability, reduces coal petrography severity of mixing up, by being inclined to arrangement and moving towards Arrangement combinations are exploited, and can be further ensured that the safe and efficient production in mine.
Description of the drawings
By being described to embodiment below in conjunction with the accompanying drawings, the features described above and technological merit of the present invention will become It is more clear and easy to understand.
Fig. 1 is the recovery process schematic diagram of the recovery method of open coal mine adopted in the specific embodiment of the invention.
Fig. 2 is the schematic flow sheet of the recovery method of open coal mine adopted in the specific embodiment of the invention.
Wherein reference:
11:First working pit edge; 12:Step; 13:First end is helped;
21:Second working pit edge; 22:Second non working slope; 23:Help at the second end.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference Accompanying drawing, the present invention is described in more detail.Wherein identical parts are presented with like reference characters.Need explanation It is that word "front", "rear", "left", "right" used in describing below, "up" and "down" refer to the direction in accompanying drawing.Use Word " interior " and " outward " refer respectively to the direction towards or away from particular elements geometric center.Filled black arrow represents work It is when making line tendency arrangement, horizontal to adopt direction of propulsion, when white filling arrow represents work item and move towards arrangement, indulge and adopt direction of propulsion, arrow Head represents follow-up direction of the internal dumping to stope.Tendency and move towards it is relative with mineral deposit for.
Fig. 1 is the recovery process schematic diagram of the recovery method of open coal mine adopted in the specific embodiment of the invention.Such as Fig. 1 Shown, the recovery method of open coal mine includes:
(1) the follow-up distance for extending between In-pit dumping area and mining area forms headspace.
(2) advance in mining area and form the opposing parallel first ends side 13 of the first working pit edge 11 and two, the first work Side 11 includes step 12, when the distance between first end side 13 is more than the horizontal length of the ramp of step 12, the first working pit edge 11 arrange along the tendency direction in mineral deposit, and mining area is advanced to the direction of moving towards in mineral deposit.
(3) extend to mining area of lower floor, the second working pit edge 21 is formed in mining area and headspace and two relatively flat Capable the second end side 23, the second working pit edge 21 includes step 12, when the distance between first end side 13 is less than the slope of step 12 Along the direction of moving towards in mineral deposit, the horizontal length in road, the second working pit edge 21 arrange that mining area is advanced to the tendency direction in mineral deposit.
Ramp described in step (2) and (3) referred to transport ore-rock, in this step and between stepping to a new level The transport channel with certain slope built.
In the mining area that upper strata is relatively open, along the tendency direction in mineral deposit, the first working pit edge 11 arranges that mining area is to mineral deposit Move towards direction propulsion, so as to realize quick casting, reduce cost of transportation;In the mining area that lower floor is relatively narrow, pass through Arranging headspace can increase the length of the second working pit edge 21, and the second working pit edge 21 is arranged along the direction of moving towards in mineral deposit, exploitation Area is advanced to the tendency direction in mineral deposit, adopts ability to improve choosing, is reduced coal petrography and is mixed, by being inclined to arrangement and moving towards arrangement group Run jointly and adopt, the safe and efficient production in mine can be further ensured that.
In the present embodiment, exploited from earth's surface+0 to underground -6h, the absolute altitude of the mining area of each of which layer is h.+ 0 To in the mining area of-h, the first working pit edge 11 is arranged along the tendency direction in mineral deposit, and mining area is advanced to the direction of moving towards in mineral deposit, such as Shown in filled black arrow on+0 to-h the first working pit edge 11;- h to the mining area of -2h, -2h to -3h mining area with And in the mining area of -3h to -4h, along the tendency direction in mineral deposit, the first working pit edge 11 arranges that mining area is to the trend in mineral deposit Direction advances, as shown in the filled black arrow on-h to -2h, -2h to -3h, first working pit edge 11 of -3h to -4h;With opening Exploiting field is shifted downwards, and the exploitation space of colliery bottom is less and less, such as the mining area of -4h to -5h and the exploitation from -5h to -6h The horizontal length of the distance between area, first end side 13 less than the ramp of step 12, the length of the first working pit edge 11 cannot be expired Foot developing and the requirement transported.Because extending the follow-up distance of internal dumping, the such as arrow below stope illustrates internal dumping Follow-up direction, headspace can the relative length for extending the second working pit edge 21, so, thus it is possible to vary the exploitation side in coal seam To meet exploitation requirement.Mining area in the mining area of -4h to -5h and from -5h to -6h, the second working pit edge 21 is along mineral deposit Move towards direction arrangement, tendency direction from mining area to mineral deposit advance, as on the second working pit edge 21 white filling arrow shown in.
The follow-up distance extended between the internal dumping and the stope of mining area in In-pit dumping area, increases headspace, When colliery bottom is exploited, can be in headspace with respect to the length for extending the second working pit edge 21, to change the exploitation in coal seam Direction, is changed into by tendency arrangement active line and moves towards to arrange active line, in order to the arrangement of transportation system, reduces exploitation difficulty, Improve production efficiency.
Preferably, the method for extending follow-up distance includes:Delayed internal dumping to stope with progress, by delayed follow-up Degree, can extend the distance between internal dumping and stope, increase headspace.
The horizontal length of ramp is longer, and the area which takes is bigger, and the gradient of step 12 is less, and the safety of transport is got over It is high.The length of ramp should be selected according to factors such as area occupied and safeties.Preferably, in step (2) and/or step (3) also include in:The horizontal length of ramp is 8~12.5 times of 12 height of step.
Preferably, also include in step (3):The propulsion side of the direction of propulsion of the first working pit edge 11 and the second working pit edge 21 To being mutually perpendicular to.Tendency arrangement active line of first working pit edge 11 (also referred to as horizontal to adopt active line), the second working pit edge 21 move towards to arrange work Make line (also referred to as indulge adopt active line), the active line of the direction of propulsion of the active line of the first working pit edge 11 perpendicular to the second working pit edge 21 Direction of propulsion, i.e., the horizontal direction of propulsion for adopting active line with it is vertical adopt active line move towards that direction is consistent, indulge the propulsion for adopting active line Direction with it is horizontal adopt active line to move towards direction consistent.To plan exploitation space, active line is quickly arranged, divide end side, non-work Help and working pit edge.
Preferably, also included before step (3):When upper strata, exploitation paneling is finished, and to mining area of lower floor deepening, is repeated Step (2), to first end side the distance between 13 less than the ramp of step 12 horizontal length, into step (3).Work as colliery During shape colliery long narrow for inclination multiple seam, the mode being adapted to should be selected to exploit according to the concrete condition in coal seam, select the work being adapted to Make line arrangement.When horizontal length of the distance between the first end side 13 more than the ramp of step 12, mining area is represented Space it is relatively large, be adapted to, using tendency arrangement active line, be exploited according to step (2), so as to quick In-pit dumping.
Preferably, recovery method also includes step (4), and when upper strata, exploitation paneling is finished, to mining area of lower floor deepening, weight Multiple step (3), until being advanced into boundary, stops exploitation.When the distance between first end side 13 is less than the ramp of step 12 During horizontal length, represent that the space of mining area is relatively small, be no longer appropriate for tendency arrangement active line, be more suitable for relative prolongation trend Exploitation is moved towards after active line, is exploited according to step (3), coal petrography can be reduced and mixed, improved choosing and adopt ability.
Recovery method also includes:When the distance between first end side 13 is equal to the horizontal length of the ramp of step 12, can Into step (2) or step (3), now, the mining type of step (2) and step (3) is suitable for mining area, arbitrarily can select Select, or selected according to other mining factors.
The exploitation flow process of the recovery method of open coal mine is described further below.Fig. 2 be the specific embodiment of the invention in adopt The schematic flow sheet of the recovery method of open coal mine.As shown in Fig. 2
The first step is that the follow-up distance extended between In-pit dumping area and mining area forms headspace, so as in colliery bottom Being capable of the relative laying length for extending working pit edge during exploitation.
Second step is the size for comparing the distance between first end side and the horizontal length of ramp between, to determine to adopt Working pit edge is laid with which kind of mode (horizontal adopt or vertical adopt).
3rd step is, when horizontal length of the distance between the first end side more than ramp, to be inclined to arrangement in mining area First working pit edge, and along coal seam move towards propulsion (such as step (2)).4th step is when the distance between first end side is less than oblique During the horizontal length in ramp, move towards to arrange the second working pit edge in mining area and headspace, and the tendency along coal seam is advanced (such as step (3)).
When colliery has the coal seam of multiple mining area's areas relatively large (being judged by second step), then need to repeat the 3rd Step.
When colliery has the coal seam of multiple mining area's areas relatively small (being judged by second step), then need to repeat the 4th Step.
In addition, in second step, when the distance between first end side is equal with the horizontal length of ramp, can basis The actual conditions in colliery, selects the 3rd step or the 4th step.
Understand with practice from the description above, the recovery method of the open coal mine that the present invention is provided, compared with prior art, With advantages below:In the mining area use tendency arrangement exploitation that upper strata is relatively open, along move towards to advance, so as to Quick casting is realized, cost of transportation is reduced;In the mining area that lower floor is relatively narrow, work can be increased by arranging headspace The length of line, while using arrangement exploitation is moved towards, along tendency propulsion, can solve the problem that colliery bottom active line is short, opening up The difficult problem of arrangement of conveying system, while can also improve choosing adopts ability, reduces coal petrography severity of mixing up, by be inclined to arrangement and Arrangement combinations exploitation is moved towards, the safe and efficient production in mine can be further ensured that.
Those of ordinary skill in the art should be understood:The specific embodiment of the present invention is the foregoing is only, and The restriction present invention is not used in, all within the purport of the present invention, any modification, equivalent substitution and improvements done etc. all should be included Within protection scope of the present invention.

Claims (7)

1. a kind of recovery method of open coal mine, it is characterised in that include:
(1) the follow-up distance for extending between the In-pit dumping area and the mining area forms headspace;
(2) advance in the mining area and form the opposing parallel first ends side of the first working pit edge and two, first work Side includes step, when the distance between first end side is more than the horizontal length of the ramp of the step, first work Help to arrange along the tendency direction in mineral deposit, the mining area is advanced to the direction of moving towards in the mineral deposit;
(3) to mining area's deepening described in lower floor, the second working pit edge and two are formed in the mining area and the headspace Opposing parallel the second end side, second working pit edge include the step, when the distance between first end side is less than institute The horizontal length of the ramp of step is stated, second working pit edge moves towards direction arrangement, the exploitation along the described of the mineral deposit The tendency direction propulsion of the area to the mineral deposit.
2. the recovery method of open coal mine according to claim 1, it is characterised in that extend the method bag of follow-up distance Include:
The internal dumping in the delayed In-pit dumping area is to the stope of the mining area with progress.
3. the recovery method of open coal mine according to claim 1, it is characterised in that in step (2) and/or step (3) In also include:
The horizontal length of the ramp is 8~12.5 times of the shoulder height.
4. the recovery method of open coal mine according to claim 1, it is characterised in that also include in step (3):
The direction of propulsion of first working pit edge is mutually perpendicular to the direction of propulsion of second working pit edge.
5. the recovery method of the open coal mine according to any one of Claims 1-4, it is characterised in that before step (3) Also include:
To mining area's deepening described in lower floor, extremely repeat step (2), institute of the distance between the first end side less than the step The horizontal length of ramp is stated, into step (3).
6. the recovery method of the open coal mine according to any one of Claims 1-4, it is characterised in that the recovery method Also include step (4):
To mining area's deepening described in lower floor, repeat step (3), until being advanced into boundary.
7. the recovery method of the open coal mine according to any one of Claims 1-4, it is characterised in that the recovery method Also include:
When the distance between first end side is equal to the horizontal length of the ramp of the step, step (2) or step can be entered Suddenly (3).
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Cited By (8)

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CN107542464A (en) * 2017-09-28 2018-01-05 西安科技大学 A kind of pinpoint blasting method under the conditions of open coal mine shovel and truck technology
CN107989617A (en) * 2017-12-05 2018-05-04 昆明冶金高等专科学校 A kind of strip mining transformation method of gently inclined orebody
CN108825242A (en) * 2018-05-16 2018-11-16 西安科技大学 A kind of development method suitable for tilting multiple seam opencut
CN109118926A (en) * 2018-09-26 2019-01-01 西安科技大学 A kind of opencast mining program demonstration physical model and its application method
CN110029994A (en) * 2019-04-15 2019-07-19 中国矿业大学 A kind of contiguous seams are to adopting to pick mining induced stress control method
CN110107299A (en) * 2019-06-17 2019-08-09 王建鑫 Open coal mine adopts stripping step and transport routes arrangement system and method and recovery method
CN110318759A (en) * 2019-08-09 2019-10-11 辽宁工程技术大学 A kind of deep is horizontal to adopt the vertical inclined seam surface mining method adopted of superficial part
CN112983525A (en) * 2021-03-12 2021-06-18 中国矿业大学 Inner soil discharge yard ditch remaining discharge method beneficial to ventilation of near-horizontal opencast coal mine stope

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Publication number Priority date Publication date Assignee Title
CN107542464A (en) * 2017-09-28 2018-01-05 西安科技大学 A kind of pinpoint blasting method under the conditions of open coal mine shovel and truck technology
CN107989617A (en) * 2017-12-05 2018-05-04 昆明冶金高等专科学校 A kind of strip mining transformation method of gently inclined orebody
CN108825242A (en) * 2018-05-16 2018-11-16 西安科技大学 A kind of development method suitable for tilting multiple seam opencut
CN108825242B (en) * 2018-05-16 2020-04-03 西安科技大学 Exploitation method suitable for inclined multi-coal-seam strip mine
CN109118926A (en) * 2018-09-26 2019-01-01 西安科技大学 A kind of opencast mining program demonstration physical model and its application method
CN110029994A (en) * 2019-04-15 2019-07-19 中国矿业大学 A kind of contiguous seams are to adopting to pick mining induced stress control method
CN110029994B (en) * 2019-04-15 2020-02-21 中国矿业大学 Opposite-mining opposite-excavation mining stress control method for close-distance coal seam
CN110107299A (en) * 2019-06-17 2019-08-09 王建鑫 Open coal mine adopts stripping step and transport routes arrangement system and method and recovery method
CN110107299B (en) * 2019-06-17 2020-12-25 王建鑫 Open pit coal mine step mining and stripping and transportation road arrangement system and method and mining method
CN110318759A (en) * 2019-08-09 2019-10-11 辽宁工程技术大学 A kind of deep is horizontal to adopt the vertical inclined seam surface mining method adopted of superficial part
CN112983525A (en) * 2021-03-12 2021-06-18 中国矿业大学 Inner soil discharge yard ditch remaining discharge method beneficial to ventilation of near-horizontal opencast coal mine stope

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