CN110348645B - Opencut coal mine dumping line arrangement method based on internal dumping space utilization maximization - Google Patents
Opencut coal mine dumping line arrangement method based on internal dumping space utilization maximization Download PDFInfo
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Abstract
The invention discloses an opencast coal mine earth discharge line arrangement method based on internal discharge space utilization maximization, and belongs to the technical field of opencast mining. The method comprises the following steps of firstly, dividing the inclination angle of a substrate into 0 degree and not 0 degree according to the attitude of the substrate of an inner soil discharge field, and arranging an inner soil discharge field working line and a stope working line in parallel when the inclination angle of the substrate is 0 degree; if the inclination angle of the base is not 0 degree, dividing the mining area into 2 calculation areas, wherein one calculation area is simply and quickly solved through the function of expanding steps in 3Dmine, the other area respectively establishes calculation model space geometric forms M1 and M2 according to whether the stope working line is perpendicular to the end slope or not, and deduces according to the drawn space geometric forms M1 and M2 to obtain the included angle theta between the inner dumping working line and the end slopepAccording to the included angle theta between the inner soil discharge working line and the end slopepAnd drawing an inner soil discharging working line so as to maximize the utilization of the inner soil discharging space.
Description
Technical Field
The invention relates to the technical field of open pit mining, in particular to a method for arranging an open pit coal mine earth discharge line based on internal discharge space utilization maximization.
Background
The inner earth-discharging field is a necessary product of surface mining of a nearly horizontal and slowly inclined coal bed, and is also an optimal measure for treating spontaneous combustion of coal, dust raising and controlling slope stability, and the maximization of space utilization is realized from a technically feasible capacity level to an economically reasonable cost benefit level. With the wide application of the horizontal mining and internal drainage mining technology of the opencast coal mine in China, the inclination of the stratigraphic attitude per se and the arrangement of the working line of the internal drainage field are difficult to solve, and if the planning is unreasonable, the drainage space is seriously lagged, as shown in figure 3, the production cost of the opencast coal mine is greatly increased. Therefore, determining a method of arranging the dump line of the open pit coal mine that maximizes the utilization of the inner drainage space becomes a key to solve the problem.
In recent years, experts and scholars at home and abroad carry out a great deal of research on the planning of an internal drainage site and the optimization of an internal drainage scheme, but the research on the method for arranging the drainage lines of the open-pit coal mine with maximized utilization of the internal drainage space is less, the method is widely used for trial drawing based on drawing software such as CAD (computer-aided design) and 3Dmine, and when the base of the internal drainage site is horizontal or nearly horizontal, the arrangement direction of the internal drainage site is quickly and accurately obtained; when the inner soil discharge field base is slowly inclined or inclined, the trial drawing workload is large, and an accurate solution is difficult to solve. Therefore, a new calculation method is urgently needed to be provided for solving the problem of arrangement of the dumping line of the open-pit coal mine with maximized utilization of the internal drainage space and providing a theoretical basis for application of the transverse mining internal drainage tracking mining technology in engineering practice.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for arranging the waste disposal lines of the open pit coal mine based on the maximization of the utilization of the inner disposal space.
The technical scheme adopted by the invention is as follows:
a method for arranging a waste disposal line of an open pit coal mine based on internal drainage space utilization maximization is disclosed, the process of which is shown in figure 1, and the method comprises the following steps:
step 1: judging whether the inclination angle of the base of the earth discharge field in the strip mine is 0 degree or not;
step 2: if the inclination angle of the inner soil discharge field base of the strip mine is 0 degrees, the inner soil discharge field working line and the stope working line are arranged in parallel, the tracking distance between the slope bottom line of the lowest soil discharge step of the inner soil discharge field and the slope bottom line of the lowest coal mining step is 50m, and as shown in figure 2, the maximization of the inner discharge space can be realized;
and step 3: if the inclination angle of the inner soil discharge field base is not 0 degrees, dividing the opencast coal mine into 2 calculation areas, and recording the calculation areas as an area I and an area II;
and 4, step 4: the arrangement of the working lines of the inner soil discharge field in the area I can be simply and quickly solved by expanding the step function in the 3 Dmine;
and 5: judging whether a stope working line and an end slope in a zone II are vertical, wherein the plan view of the calculation area division and calculation model of the open pit coal mine is shown in figure 4 when the stope working line and the end slope are vertical, and the plan view of the calculation area division and calculation model of the open pit coal mine is shown in figure 6 when the stope working line and the end slope are not vertical;
step 6: if vertical, the computational model space geometry M1 is plotted, as shown in FIG. 5;
assuming that the working side slope angle of open pit coal mine stope is betac(ii) a The side slope angle of the inner soil discharge field is betap(ii) a The inclination angle of the substrate is alpha; the arrangement direction of the stope working lines is that the included angle between the stope working lines and the end walls is thetac(ii) a The arrangement direction of the working lines of the inner soil discharge field is the included angle theta between the soil discharge working line and the end slopep(ii) a Step 6-1: the first dumping step is O 'at the top dead center at the base of the inner dumping field, the intersection point of the inner dumping field and the lowest step of the end slope is O, the intersection point is connected with the O' O, and the length is L0；
Step 6-2: using O' and O points as vertical lines of stope working wall and end wall respectively, the plane intersection point is B, and the OB length is L3；
Step 6-3, taking the point B as a downward vertical line to form a point B 'of intersection with the substrate, the length of BB' being H, and the length of O 'B' being L1；
Step 6-4: is connected with OB ', the length of OB' is L, and angle BO 'B' is working upper slope angle beta of stopecB, the angle BOB' is the inclination angle of the base of the internal soil discharge field, and the angle value is equal to alpha;
step 6-5: taking the point O as a parallel line of the working line of the inner soil discharge field, taking the point O' as a perpendicular line of the working line of the inner soil discharge field, and taking the intersection point of the planes as C;
step 6-6: is connected with OC and O' C, and has a length of L4、L2''；
Step 6-7: the point C 'is the intersection of the point C and the substrate, the same elevation as the point O' is the point C ', and the length of CC' is H1C 'C' is of length H2；
And 6-8: connected with OC' of length L5Is connected to O 'C', O 'C' is L in length2Length L of O' C2', "CO' C" is the side slope angle beta of the internal earth-discharging fieldpB < CO 'C' is betasB < C ' O ' C ' is betaj；
Step 6-9: a, A ' is defined as the intersection point of the perpendicular line drawn by the point C, C ' and the OB and OB ' respectively;
step 6-10: the crossing point O 'is taken as a vertical surface vertical to the end wall, the intersecting line with the substrate is O' D ', the intersecting point with the CA is a point D, the projection of the O' D 'on the horizontal plane is OD', and the length is LdAnd < D 'O' D '' is the base inclination angle alpha.
And 7: if not, the computational model space geometry M2 is plotted, as shown in FIG. 7;
assuming that the working side slope angle of open pit coal mine stope is betaec(ii) a The side slope angle of the inner soil discharge field is betaep(ii) a Inclination angle of the substrate of alphae(ii) a The arrangement direction of the stope working lines is that the included angle between the stope working lines and the end walls is thetaec(ii) a The arrangement direction of the working lines of the inner soil discharge field is the included angle theta between the soil discharge working line and the end slopeep；
Step 7-1: the vanishing points of the first stope step and the dumping step at the tip of the inner dumping ground base are all points Oe' the intersection points of the stope, the inner soil discharge field and the lowest step of the end wall are all points DeMoving the model stope end to the inner side of the refuse dump to form a common edge Oe'DeLength of Le0；
Step 7-2: passing point Oe' making vertical line of stope working line, passing point DeParallel lines as stope working lines, intersecting at point AeDA of length Le5；
And 7-3: passing point Oe' perpendicular line and passing point D for working line of inner soil discharge fieldeMaking parallel lines of the working lines of the inner soil discharge field, and crossing at the point BeDB of length Le6；
And 7-4: at point AePoint BeMaking a vertical line, and the intersection points of the vertical line and the substrate are respectively Ae'、Be'，AeAe' Length is He3，BeBe' Length is He1The intersection point of the working line and the vertical line of the working line of the stope and the inner soil discharge field is Ae''、Be''，Ae'Ae'' length is He4， Be'Be'' length is He2；Be Be' has a length of He；
And 7-5: connection AeOe', length Le1''；Ae'Oe', length Le1；Ae''Oe' Length is Le1'；∠AeOe'Ae'' is the working side slope angle beta of stopeec，∠Ae'Oe'Ae'' is betaeg；
And 7-6: connection BeOe', length Le2''; connection Be'Oe', length Le2；Be''Oe' Length is Le2'，∠BeOe'Be'' is an inner soil discharge field side slope angle betaep，∠Be'Oe'Be'' is betaej；
And 7-7: passing point DeMaking parallel lines of end slope and crossing point AeMaking vertical line of end wall cross over point OeAnd passing point BeMaking vertical line of end wall cross over point Oe''；
And 7-8: connection Ae'OeAnd Be'Oe''，∠AeOeAe'、∠BeOe''BeAll are base inclination angle alphae，AeOeLength Le3， BeOe'' length Le4；
And 7-9: per Oe'DeAs a plane perpendicular to the substrate, and through line Ae'Ae' the surface is vertical, and the intersection line of the two surfaces is De1''De2''；
And 7-10: per Oe'DeAs a plane perpendicular to the substrate, and through line Be'Be' the surface is vertical, and the intersection line of the two surfaces is De'De''。
And 8: deducing according to the drawn space geometric forms M1 and M2 to obtain an included angle between the working line of the inner soil discharge field and the end slope;
the calculation formula of the included angle between the inner soil discharge field working line and the end slope is derived from M1 as follows:
wherein, thetapThe included angle between the working line of the inner soil discharge field and the end wall is formed under the condition that the working line of the stope is perpendicular to the end wall.
The calculation formula of the included angle between the inner soil discharge field working line and the end slope is derived from M2 as follows:
wherein, thetaepThe included angle between the working line of the inner soil discharge field and the end wall is formed under the condition that the working line of the stope is not perpendicular to the end wall.
And step 9: and drawing the inner soil discharge field working line according to the included angle between the inner soil discharge field working line and the end slope.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the opencast coal mine earth discharge line arrangement method based on the maximization of the utilization of the inner discharge space provided by the invention gives consideration to relevant factors such as a base inclination angle, a stope working side slope angle, an inner earth discharge side slope angle and a stope working line arrangement direction angle, provides an opencast coal mine earth discharge line arrangement angle solving formula with the maximization of the utilization of the inner discharge space, can be combined with 3Dmine software, overcomes the defect of large workload of the conventional method for designing earth discharge line arrangement trial drawing, and provides a theoretical basis for the application of a transverse mining inner discharge tracing mining technology in engineering practice.
Drawings
FIG. 1 is a flow chart of a method of arranging a waste dump line in an open pit coal mine according to the present invention based on maximizing the utilization of internal dump space;
FIG. 2 is a layout view of a discharging line for maximizing the utilization of the inner discharging space when the inclination angle of the base of the inner discharging field is 0 degree according to the present invention;
FIG. 3 is a lag diagram of a large number of inner soil discharge spaces caused by the parallel arrangement of the working lines of the inner soil discharge site and the working lines of the stope when the inclination angle of the base of the inner soil discharge site is not 0 degrees;
FIG. 4 is a top view of a model for dividing the calculation area and calculating open pit coal mines when the inclination angle of the inner soil discharge yard base is not 0 degrees and the stope working line is perpendicular to the end slope according to the present invention;
FIG. 5 is a geometric shape M1 of a calculation model space drawn when the inclination angle of the base of the inner soil discharge field is not 0 degree and the stope working line is perpendicular to the end slope;
FIG. 6 is a top view of a calculation area division and calculation model for an open pit coal mine when the inclination angle of the inner soil discharge yard base is not 0 degrees and the stope working line is not perpendicular to the end slope according to the present invention;
FIG. 7 is a geometric form M2 of a calculation model space drawn when the inclination angle of the base of the inner soil discharge yard is not 0 degrees and the stope working line is not perpendicular to the end wall;
fig. 8 is an optimized layout diagram of a working line of a dumping ground in a horizontal mining area of an opencast coal mine in 2023 in the embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The mining process of a certain opencast coal mine comprises the following steps: the loose soil layer is stripped by adopting a wheel bucket-adhesive tape continuous process, and the upper rock stripping and coal mining are both carried out by adopting a single bucket-truck intermittent process.
Taking the opencast coal mine transverse mining area as an engineering example, according to the schedule of the stripping engineering in 2023 of 2019 plus, the south slope, the east slope and the north slope of the transverse mining area in 2023 reach the boundary, stripped materials are all discharged to the east inner soil discharge site due to the reasons of large land acquisition and discharge cost and the like, the stope working line is vertically arranged with the south end slope, and the included angle theta between the inner soil discharge site working line and the end slope is calculated by using a formula derived from the space geometric form M1p。
Measuring stope working side slope angle betacApproximately 16.1 degrees, and an inner soil discharge field side slope angle betapAbout 15.5 ° and the inclination of the inner soil displacement bed to the base α of about 13.5 °, these three angles are substituted into the formula derived from geometry M1, as follows:
calculating to obtain the included angle theta between the inner dumping field and the end slopepThe value of (A) is 46.3 degrees, and a stripping engineering plan of a horizontal mining area of an opencast coal mine is simply and accurately drawn by applying 3Dmine software, and the schematic diagram is shown in FIG. 8.
The arrangement direction of the in-east soil discharge lines of the open pit coal mine is optimized according to the steps, the inner discharge space is fully utilized, and the method has important significance for realizing safe, economical and efficient production of the mine.
Claims (3)
1. A method for arranging an open pit coal mine dumping line based on internal dumping space utilization maximization is characterized by comprising the following steps:
step 1: judging whether the inclination angle of the base of the earth discharge field in the strip mine is 0 degree or not;
step 2: if the inclination angle of the base of the inner soil discharge site of the strip mine is 0 degrees, the soil discharge working line and the stope working line are arranged in parallel, and the tracking distance between the slope bottom line of the lowest soil discharge step of the inner soil discharge site and the slope bottom line of the lowest coal mining step is 50m, the maximization of the inner soil discharge space can be realized;
and step 3: if the inclination angle of the base of the earth discharge field in the open pit mine is not 0 degrees, dividing the open pit mine into 2 calculation areas, and recording the calculation areas as an area I and an area II;
and 4, step 4: the arrangement of the working lines of the inner soil discharge field in the area I can be simply and quickly solved by expanding the step function in the 3 Dmine;
and 5: judging whether the stope working line in the area II is vertical to the end wall;
step 6: if vertical, the computational model space geometry M1 is plotted as follows:
assuming that the working side slope angle of open pit coal mine stope is betac(ii) a The side slope angle of the inner soil discharge field is betap(ii) a The inclination angle of the substrate is alpha; the arrangement direction of the stope working lines is that the included angle between the stope working lines and the end walls is thetac(ii) a The arrangement direction of the working lines of the inner soil discharge field is the included angle theta between the soil discharge working line and the end slopep；
Step 6-1: the first dumping step is O 'at the top dead center at the base of the inner dumping field, the intersection point of the inner dumping field and the lowest step of the end slope is O, the intersection point is connected with the O' O, and the length is L0；
Step 6-2: using O' and O points as vertical lines of stope working wall and end wall respectively, the plane intersection point is B, and the OB length is L3；
Step 6-3, taking the point B as a downward vertical line to form a point B 'of intersection with the substrate, the length of BB' being H, and the length of O 'B' being L1；
Step 6-4: is connected with OB ', the length of OB' is L, and angle BO 'B' is working upper slope angle beta of stopecB, the angle BOB' is the inclination angle of the base of the internal soil discharge field, and the angle value is equal to alpha;
step 6-5: taking the point O as a parallel line of the working line of the inner soil discharge field, taking the point O' as a perpendicular line of the working line of the inner soil discharge field, and taking the intersection point of the planes as C;
step 6-6: is connected with OC and O' C, and has a length of L4、L2''；
Step 6-7: the point C 'is the intersection of the point C and the substrate, the same elevation as the point O' is the point C ', and the length of CC' is H1C 'C' is of length H2；
And 6-8: connected with OC' of length L5Is connected to O 'C', O 'C' is L in length2Length L of O' C2', "CO' C" is the side slope angle beta of the internal earth-discharging fieldpB < CO 'C' is betasB < C ' O ' C ' is betaj；
Step 6-9: a, A ' is defined as the intersection point of the perpendicular line drawn by the point C, C ' and the OB and OB ' respectively;
step 6-10: the crossing point O 'is taken as a vertical surface vertical to the end wall, the intersecting line with the substrate is O' D ', the intersecting point with the CA is a point D, the projection of the O' D 'on the horizontal plane is OD', and the length is LdLet < D 'O' D '' be the inclination angle of the basement alpha;
and 7: if not, the computational model space geometry M2 is plotted, as follows:
assuming that the working side slope angle of open pit coal mine stope is betaec(ii) a The side slope angle of the inner soil discharge field is betaep(ii) a Inclination angle of the substrate of alphae(ii) a The arrangement direction of the stope working lines is that the included angle between the stope working lines and the end walls is thetaec(ii) a The arrangement direction of the working lines of the inner soil discharge field is the included angle theta between the soil discharge working line and the end slopeep；
Step 7-1: the vanishing points of the first stope step and the dumping step at the tip of the inner dumping ground base are all points Oe' the intersection points of the stope, the inner soil discharge field and the lowest step of the end wall are all points DeMoving the model stope end to the inner side of the refuse dump to form a common edge Oe'DeLength of Le0；
Step 7-2: passing point Oe' making vertical line of stope working line, passing point DeParallel lines as stope working lines, intersecting at point Ae，DeAeLength Le5；
And 7-3: passing point Oe' perpendicular line and passing point D for working line of inner soil discharge fieldeMaking parallel lines of the working lines of the inner soil discharge field, and crossing at the point Be，DeBeLength Le6；
And 7-4: at point AePoint BeMaking a vertical line, and the intersection points of the vertical line and the substrate are respectively Ae'、Be'，AeAe' Length is He3，BeBe' Length is He1The intersection point of the working line and the vertical line of the working line of the stope and the inner soil discharge field is Ae'' 、Be'' ，Ae'AeLength ofIs He4，Be'Be'' length is He2；
And 7-5: connection AeOe', length Le1'' ；Ae'Oe', length Le1；Ae'' Oe' Length is Le1'；∠AeOe'Ae'' is the working side slope angle beta of stopeec，∠Ae'Oe'Ae'' is betaeg；
And 7-6: connection BeOe', length Le2''; connection Be'Oe', length Le2；Be'' Oe' Length is Le2'，∠BeOe'Be'' is an inner soil discharge field side slope angle betaep，∠Be'Oe'Be'' is betaej；
And 7-7: passing point DeMaking parallel lines of end slope and crossing point AeMaking vertical line of end wall cross over point OeAnd passing point BeMaking vertical line of end wall cross over point Oe''；
And 7-8: connection Ae'OeAnd Be'Oe''，∠AeOeAe'、∠BeOe''BeAll are base inclination angle alphae，AeOeLength Le3，BeOe'' length Le4；
And 7-9: per Oe'DeAs a plane perpendicular to the substrate, and through line Ae'Ae' the surface is vertical, and the intersection line of the two surfaces is De1''De2''；
And 7-10: per Oe'DeAs a plane perpendicular to the substrate, and through line Be'Be' the surface is vertical, and the intersection line of the two surfaces is De'De''；
And 8: deducing according to the drawn space geometric forms M1 and M2 to obtain an included angle between the working line of the inner soil discharge field and the end slope;
and step 9: and drawing the inner soil discharge field working line according to the included angle between the inner soil discharge field working line and the end slope.
2. The method for arranging the discharging line of the open pit coal mine based on the maximization of the inner drainage space utilization according to claim 1, wherein the derivation is carried out according to the drawn space geometry M1 in the step 8, and the formula of the included angle between the working line of the inner drainage yard and the end slope is obtained as follows:
wherein, thetapThe included angle between the working line of the inner soil discharge field and the end wall is formed under the condition that the working line of the stope is perpendicular to the end wall.
3. The method for arranging the discharging line of the open pit coal mine based on the maximization of the inner drainage space utilization according to claim 1, wherein the derivation is carried out according to the drawn space geometry M2 in the step 8, and the formula of the included angle between the working line of the inner drainage yard and the end slope is obtained as follows:
wherein, thetaepThe included angle between the working line of the inner soil discharge field and the end wall is formed under the condition that the working line of the stope is not perpendicular to the end wall.
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