CN112943252A - Steering continuous mining method for mining area of strip mine - Google Patents
Steering continuous mining method for mining area of strip mine Download PDFInfo
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- CN112943252A CN112943252A CN202110438311.6A CN202110438311A CN112943252A CN 112943252 A CN112943252 A CN 112943252A CN 202110438311 A CN202110438311 A CN 202110438311A CN 112943252 A CN112943252 A CN 112943252A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C47/00—Machines for obtaining or the removal of materials in open-pit mines
- E21C47/02—Machines for obtaining or the removal of materials in open-pit mines for coal, brown coal, or the like
Abstract
The application belongs to the technical field of strip mine mining, and particularly relates to a turning and continuous mining method for a mining area of a strip mine, which provides a method for turning a working slope of a nearly horizontal strip mine from a first mining area to a second mining area, wherein the method adopts a single bucket excavator-automobile mining process to finish the turning from the first mining area to the second mining area, and comprises the steps of forming the first mining area, reversely propelling the working slope, propelling the turning and continuous steering of the second mining area, finishing the turning of the mining area and the like; and mine exploitation disturbance is reduced, and the minimization of exploitation disturbance damage to land expropriation during the diversion is realized.
Description
Technical Field
The application belongs to the technical field of strip mine mining, and particularly relates to a method for turning and continuing mining in a mining area of a strip mine.
Background
Under the condition that a single-bucket excavator-automobile mining process is adopted in a horizontal or nearly horizontal open pit coal mine and the adjacent mining area is steered, the traditional mining area continuing mode comprises modes of re-trench-drawing, sector steering and the like. Although the district switching and continuing mode can complete the task of district switching, the external discharge amount is large, the transport distance and the lifting height are large during the corresponding district switching period, so that the mining cost is increased.
Therefore, the horizontal and nearly horizontal surface mines are mined in a subarea mode, and the surface mines adopting the single-bucket truck mining process need a new method for turning the mining areas urgently to stabilize the internal and external discharge capacity during the turning period, so that the problems of large external discharge capacity, high transportation cost, large external discharge land acquisition amount and mining disturbance caused by the turning period are solved.
Disclosure of Invention
The present application is directed to a method of continuous mining in a panel mine to solve or alleviate the above-mentioned problems of the prior art.
In order to achieve the above purpose, the present application provides the following technical solutions:
the application provides a method for turning and continuing mining of a mining area of a strip mine, and provides a method for turning a working slope of a nearly horizontal strip mine from a first mining area to a second mining area, wherein a single-bucket excavator-automobile mining process is adopted to finish the continuation during the turning from the first mining area to the second mining area, and the method comprises the following steps:
step S1, first mining area division: in the process of advancing the working slope of the strip mine, the first mining area is divided into an acceleration advancing area and a cooperative advancing area, the working slope of the acceleration advancing area is a first working slope, the working slope of the cooperative advancing area is a second working slope, the length of a working line of the first working slope is smaller than that of the second working slope, and the first working slope is earlier than the second working slope to the boundary.
Step S2, forming a reverse advancing working upper: after the earth surface of the first working slope is mined to the boundary, a third working slope is formed at the connecting side of the accelerated propulsion area and the second mining area, a fourth working slope is formed at the connecting side of the accelerated propulsion area and the cooperative propulsion area, and two reverse propulsion working slopes are formed by the third working slope and the fourth working slope.
Step S3, the second mining area turns to the continuous propulsion: when the mining steps of the first working slope gradually lean to the boundary, the first working slope disappears, the third working slope is accelerated to be the main production stripping and coal mining capacity after turning, and the fourth working slope and the third working slope are reversely propelled at the moment to form a reverse propulsion working line and an initial inner dumping field.
Step S4, end of panel diversion: and the fourth working slope and the third working slope disappear after being reversely pushed to the boundary, the fourth working slope and the third working slope are converted into boundary non-working slopes, the mining area is turned to be finished, and the inner soil discharge field is built.
Preferably, in step S1, an initial position of the first mining area is determined, and during the advancing process of the first mining area according to the set mining mode, when the stripping ratio of the first mining area is lowered, the mining area enters the steering influence area, and at this time, the first mining area is divided into an acceleration advancing area and a coordinated advancing area.
Preferably, the specific calculation of the stripping ratio is: stripping ratio is the amount of rock stripped per amount of coal mined.
Preferably, in step S1, the working line length of the acceleration advance area is calculated, and the lowest step working line length L of the acceleration advance area is calculated0And after the determination, calculating the length of the working line of the acceleration propulsion area according to the width b of the working flat plate of the strip mine, the height h of the mining step and the slope angle alpha.
Preferably in step S1, L0The shortest requirement of the length of a service working line for deploying one excavating device is met.
Preferably in step S1, after the work line length of the accelerated advancement zone is determined, the mining bench is formed at the first highwall and advanced until the boundary.
Preferably, in step S2, after the reverse push counter is formed, the ground stripping divert work for the third counter is started.
Preferably, in step S3, the first working upper becomes a non-working upper after the boundary, and the later stage is covered by the inner soil discharge field compaction.
Preferably, in step S3, the mining bench of the third working slope is accelerated and advanced according to the designed bench height and flat pan width, so as to form the main production stripping and coal mining capability of the diverted second mining area.
Preferably, in the step S3 and the step S4, the fourth working slope and the third working slope advance reversely, simultaneously, the second working slope keeps advancing cooperatively, the production stripping and coal mining capabilities of the strip mine are cooperatively supplemented, the stripping materials in the mining process are all discharged to an inner dump, and the second working slope, the third working slope and the fourth working slope disappear after reaching the boundary.
Preferably, in steps S3 and S4, the work line of the second worktop advances perpendicular to the work line of the fourth worktop.
Has the advantages that:
the invention provides a turning continuous mining method for mining areas of a strip mine, and provides a turning method between adjacent mining areas, the method can realize local accelerated propulsion to the boundary, the first mining area and the second mining area are reversely and simultaneously propelled after turning, the inner discharge space is quickly released, the engineering position is prepared for the inner discharge of the strip mine in advance, the utilization rate of the released inner discharge space is reasonably and optimally utilized, and the outer discharge stripping amount during turning is reduced, so that the transportation cost during turning is reduced; and mine exploitation disturbance is reduced, and the minimization of exploitation disturbance damage to land expropriation during the diversion is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. Wherein:
fig. 1 is a schematic illustration of a surface mine mining area diversion follow-on method step S1 according to some embodiments of the present application;
fig. 2 is a schematic illustration of a surface mine mining area diversion follow-on method step S2 according to some embodiments of the present application;
fig. 3 is a first schematic illustration of a first method step S3 of diverting a surface mining zone to follow-up mining according to some embodiments of the present application;
fig. 4 is a second schematic illustration of a method of diverting a surface mining zone to continuous mining step S3 according to some embodiments of the present application;
fig. 5 is a sectional view a-a of the acceleration advancing zone in fig. 1.
Description of reference numerals:
1-acceleration propulsion zone; 2-a cooperative propulsion zone; 3-a first worktop; 4-first mining area; 5-second mining area; 6-second working upper; 7-third working upper; 8-a fourth working upper; 9-zone of influence of the diversion.
Detailed Description
The present application will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the application and are not limiting of the application. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present application cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
In the description of the present application, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present application but do not require that the present application must be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. The terms "connected," "connected," and "disposed" as used herein are intended to be broadly construed, and may include, for example, fixed and removable connections; can be directly connected or indirectly connected through intermediate components; the connection may be a wired electrical connection, a wireless electrical connection, or a wireless communication signal connection, and a person skilled in the art can understand the specific meaning of the above terms according to specific situations.
As shown in fig. 1 to 5, the invention discloses a method for turning and continuing mining of a mining area of a strip mine, which provides a method for turning a working slope of a nearly horizontal strip mine from a first mining area 4 to a second mining area 5, wherein a single-bucket excavator-automobile mining process is adopted to complete the continuation during the turning from the first mining area 4 to the second mining area 5, and the method comprises the following steps:
step S1, first sector 4 division.
As shown in fig. 1, in the process of advancing the working slope of the strip mine, a first mining area 4 is divided into an accelerating advancing area 1 and a cooperative advancing area 2, so as to realize the quick arrival of the local working slope in the strip mine and provide favorable engineering space for the inward discharge during the steering period.
The working upper of the accelerating and propelling area 1 is a first working upper 3, and the working upper of the cooperative propelling area 2 is a second working upper 6. The length of the working line of the first working upper 3 is smaller than that of the second working upper 6, so that the first working upper 3 reaches the boundary earlier than the second working upper 6.
In order to balance the stripping ratio to meet the annual output, the cooperative propulsion area 2 and the acceleration propulsion area 1 are jointly propelled, and the propulsion speeds of the cooperative propulsion area 2 and the acceleration propulsion area are determined according to the equipment production capacity and the coal rock reserve distribution condition of each mine.
Further, in step S1, a specific method for determining the initial position of the headwork area 4 for zoning is as follows: in the advancing process of the first mining area 4 according to the established mining mode, when the stripping ratio of the first mining area 4 is reduced, the steering work is started, the mining enters a steering influence area 9, the project position at the moment is the initial position of the partition advancing, and the first mining area 4 is partitioned into an accelerating advancing area 1 and a cooperative advancing area 2.
The stripping ratio is specifically calculated as: stripping ratio (m)3T) amount of rock stripped (m)3) Coal production (t).
Further, as shown in fig. 5, in step S1, the operating line length of the acceleration/propulsion region 1 is calculated, and the lowest step operating line length L of the acceleration/propulsion region 1 is calculated0After the determination, the length L of the working line of the nth step is obtained by back calculation according to the width b of the working flat plate of the strip mine, the height h of the mining step and the slope angle alpha of the stepnThe specific calculation process is as follows:
working line length L of nth stepnAs the working line length of the acceleration propulsion zone 1. When the length of the working line of the accelerated propulsion zone 1 is determined, a mining step is formed, and the accelerated propulsion zone 1 of the first mining zone 4 is formed.
Further, in step S1, in order to quickly reach the boundary of the first working upper 3 in the actual production process of the strip mine, the length L of the lowest step working line is set0Set to the minimum value, the length L of the lowest step working line0The shorter the first worktop 3 is, the faster it reaches the boundary, and therefore, the length L of the lowermost step working line0According to the actual engineering progress requirement, specifically, L0The shortest requirement of the length of a service working line for deploying one excavating device is met.
Further, the length L of the working line of the lowest step0And can be properly shortened according to the actual project schedule requirement.
Step S2, forming the counter is advanced.
As shown in fig. 2, after the first working slope 3 accelerates to advance, and the second working slope 6 advances in coordination, when the earth surface of the first working slope 3 is mined to the boundary, two reverse advancing working slopes are formed on the left and right sides of the accelerated advancing area 1, which specifically include:
the connecting side of the acceleration propulsion area 1 and the second mining area 5 forms a third working slope 7, the connecting side of the acceleration propulsion area 1 and the collaborative propulsion area 2 forms a fourth working slope 8, and the third working slope 7 and the fourth working slope 8 form two reverse propulsion working slopes.
At this time, the work of turning the third worktop 7 for surface peeling starts to advance.
Preferably, the length of the third working slope 7 needs to be confirmed according to the actual production requirements and the equipment capacity of each mine.
Step S3, the second panel 5 is turned to continued propulsion.
As shown in fig. 3 and 4, after the mining bench of the first working slope 3 gradually leans against the slope to the boundary, the first working slope 3 disappears, the third working slope 7 accelerates to become the main production stripping and coal mining capability after turning, at this time, the fourth working slope 8 and the third working slope 7 reversely advance to form two reverse advancing working lines, and an initial inner soil discharge field is formed between the fourth working slope 8 and the third working slope 7.
Further, in step S3, the first working upper 3 becomes a non-working upper after reaching the boundary, and is covered by the inner soil discharge field compaction at the later stage. And the mining step of the third working slope 7 is accelerated and propelled according to the designed step height and the flat plate width so as to meet the main production stripping and coal mining capabilities of the second mining area 5 after turning.
Further, in step S3, in order to further satisfy the requirements of stripping and mining after turning to the second mining area 5, the second working slope 6 is cooperatively advanced to cooperatively supplement the stripping and mining capabilities. The second working upper 6 disappears after reaching the boundary and changes to a boundary non-working upper.
And step S4, finishing the mining area turning.
And the fourth working slope and the third working slope disappear after being reversely pushed to the boundary, the fourth working slope and the third working slope are converted into boundary non-working slopes, the mining area is converted to be finished, an inner soil discharging field is built, and the inner soil discharging space is filled.
Further, in the reverse propelling process of the fourth working slope and the third working slope, the third working slope 7 is a main production area of the strip mine in the mining area of the second mining area 5 and serves as an accelerated advancing area of the second mining area 5, and at this time, the strippings of the accelerated advancing area of the second mining area 5 and the cooperative advancing area 2 of the first mining area 4 are basically not exposed out of the mine pit and are all discharged to an inner dump.
In conclusion, the invention provides a method for turning and continuing mining of mining areas of a strip mine, and provides a method for turning between adjacent mining areas, which can realize local accelerated advancing to the boundary; the inner discharge space is quickly released, an engineering position is prepared for the inner discharge of the strip mine in advance, the utilization rate of the released inner discharge space is reasonably optimized and utilized, and the outward discharge stripping amount during the turning period is reduced, so that the transportation cost during the turning period is reduced; and mine exploitation disturbance is reduced, and the minimization of exploitation disturbance damage to land expropriation during the diversion is realized.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method for turning and continuing mining of a mining area of a strip mine is characterized in that a method for turning a working slope of a nearly horizontal strip mine from a first mining area to a second mining area is provided, and continuation during turning from the first mining area to the second mining area is completed by adopting a single-bucket excavator-automobile mining process, and the method comprises the following steps of:
step S1, first mining area division: in the process of advancing the working slope of the strip mine, dividing a first mining area into an acceleration advancing area and a cooperative advancing area, wherein the working slope of the acceleration advancing area is a first working slope, the working slope of the cooperative advancing area is a second working slope, the length of a working line of the first working slope is smaller than that of the second working slope, and the first working slope is earlier than the second working slope to the boundary;
step S2, forming a reverse advancing working upper: after the earth surface of the first working slope is mined to the boundary, the accelerated propulsion area and the connecting side of the second mining area form a third working slope, the accelerated propulsion area and the connecting side of the collaborative propulsion area form a fourth working slope, and the third working slope and the fourth working slope form two reverse propulsion working slopes;
step S3, the second mining area turns to the continuous propulsion: when the mining steps of the first working slope gradually lean to the boundary, the first working slope disappears, the third working slope is accelerated to be pushed to become the main production stripping and coal mining capacity after turning, and at the moment, the fourth working slope and the third working slope are pushed reversely to form a reverse pushing working line and an initial inner soil discharge field;
step S4, end of panel diversion: and the fourth working slope and the third working slope disappear after being reversely pushed to the boundary, and are converted into a boundary non-working slope, at the moment, the turning of the mining area is finished, and the inner soil discharge field is established.
2. The method of claim 1, wherein in step S1, determining an initial location of the lead zone into zones, wherein during advancement of the lead zone in a predetermined mining manner, when a stripping ratio of the lead zone decreases, indicating that mining has entered a diversion-affected zone, the lead zone is partitioned into an acceleration-advance zone and a cooperative-advance zone;
preferably, the specific calculation of the stripping ratio is: stripping ratio is the amount of rock stripped per amount of coal mined.
3. The strip mine mining area diversion and continuous mining method according to claim 2, wherein in step S1, the working line length of the accelerated progress area is calculated, and the lowest bench working line length L of the accelerated progress area is calculated0And after the determination, calculating the length of the working line of the acceleration propulsion area according to the width b of the working flat plate of the strip mine, the height h of the mining step and the slope angle alpha.
4. According to claim 3The method for turning to continuous mining of the mining area of the strip mine is characterized in that in step S1, L0The shortest requirement of the length of a service working line for deploying one excavating device is met.
5. The surface mining method of claim 4, wherein in step S1, after the work line length of the accelerated advancement zone is determined, a mining bench is formed at the first work highwall and advanced to the threshold.
6. The strip mining face diversion continuing mining method of claim 1, wherein after a reverse push highwall is formed, a surface strip diversion work of the third highwall begins to advance at step S2.
7. The surface mining method of claim 6, wherein the first highwall becomes a non-highwall after the threshold and is later covered by inner dump compaction at step S3.
8. The strip mining method of claim 7, wherein in step S3, the mining bench of the third working face is accelerated according to the designed bench height and pan width to form the main production stripping and coal mining capability of the second mining area after turning.
9. The strip mining method according to claim 8, wherein in steps S3 and S4, the fourth working slope and the third working slope advance in opposite directions, the second working slope advances in coordination, the stripping and mining capabilities of the strip mine are supplemented in coordination, the stripping materials during mining are all discarded to an inner dump, and the second working slope, the third working slope and the fourth working slope disappear after reaching the boundary.
10. The surface mining method of claim 9, wherein the workstring of the second worksite is advanced in tandem perpendicular to the workstring of the fourth workstring at steps S3 and S4.
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Cited By (1)
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