CN110107299B - Open pit coal mine step mining and stripping and transportation road arrangement system and method and mining method - Google Patents

Open pit coal mine step mining and stripping and transportation road arrangement system and method and mining method Download PDF

Info

Publication number
CN110107299B
CN110107299B CN201910523880.3A CN201910523880A CN110107299B CN 110107299 B CN110107299 B CN 110107299B CN 201910523880 A CN201910523880 A CN 201910523880A CN 110107299 B CN110107299 B CN 110107299B
Authority
CN
China
Prior art keywords
stripping
mining
trunk
slope
coal mine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910523880.3A
Other languages
Chinese (zh)
Other versions
CN110107299A (en
Inventor
王建鑫
Original Assignee
王建鑫
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 王建鑫 filed Critical 王建鑫
Priority to CN201910523880.3A priority Critical patent/CN110107299B/en
Publication of CN110107299A publication Critical patent/CN110107299A/en
Application granted granted Critical
Publication of CN110107299B publication Critical patent/CN110107299B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C47/00Machines for obtaining or the removal of materials in open-pit mines
    • E21C47/02Machines for obtaining or the removal of materials in open-pit mines for coal, brown coal, or the like

Abstract

The application relates to the field of opencast coal mines, in particular to a step stripping and transportation road arrangement system and method for an opencast coal mine and a mining method. A plurality of mutually parallel soil discharging steps are arranged in the soil discharging field, and each soil discharging step extends along the first direction. A plurality of mutually parallel mining and stripping steps and at least one main slope ramp are arranged in the stope; the extending direction of at least part of each stripping step is crossed with the first direction; the main slope way extends along a second direction, and the second direction is vertical to the first direction; each mining and stripping step is connected with the main slope way. And intersecting at least part of the extending direction of each stripping step with the first direction, so that the comprehensive transportation distance of each stripping step stripper to the dump through the trunk slope way is shortest.

Description

Open pit coal mine step mining and stripping and transportation road arrangement system and method and mining method
Technical Field
The application relates to the field of opencast coal mines, in particular to a step stripping and transportation road arrangement system and method for an opencast coal mine and a mining method.
Background
The open pit coal mine is used for mining coal resources by stripping earth and stone.
However, in the conventional arrangement form of the mining and stripping steps of the common opencast coal mine, when the stripped earth and rock at the mining point is transported to a dumping yard, other mining and stripping step ramps need to be continuously wound, and all the mining and stripping steps are generally arranged in parallel, so that the transportation distance is increased by the winding way, and the transportation cost is increased.
Disclosure of Invention
The embodiment of the application aims to provide a step stripping and transportation road arrangement system and method for an opencast coal mine and a mining method, and aims to solve the problem that the existing opencast coal mine is large in earth and stone stripping transportation distance during mining.
In a first aspect, the present application provides a technical solution:
a step stripping and transportation road arrangement system for an open pit coal mine comprises a refuse dump and a stope;
a plurality of mutually parallel soil discharging steps are arranged in the soil discharging field; each soil discharging step extends along a first direction;
a plurality of mutually parallel mining and stripping steps and at least one main slope ramp are arranged in the stope; the extending direction of at least part of each stripping step is crossed with the first direction; the main slope way extends along a second direction, and the second direction is vertical to the first direction; each mining and stripping step is connected with the main slope way.
Through setting up the trunk ramp, make each adopt and shell the step and all connect in the trunk ramp for each adopts the side of peeling off the earth and stone of peeling off of point, can follow the adoption at this point of digging and shell the step and directly transport to the trunk ramp after, then transport to the dump from the trunk ramp, need not walk around other adoption completely and shell the step, thereby has greatly shortened the transport distance, has reduced the cost of transportation. In addition, the extending direction of at least part of each mining and stripping step is intersected with the first direction, so that each mining and stripping step and each soil discharging step are not parallel to each other, and the mining and stripping step length of each mining and stripping step is increased relative to the soil discharging step. The length of the stripping steps is in positive correlation with the production capacity, so that the production capacity is increased. In the process of coal mining, the reserve production capacity of each mining stripping step to be mined subsequently is larger than that of the mining stripping step parallel to the dumping step, so that the annual production capacity adjustability is higher during open-pit coal mining.
In other embodiments of the present application, each of the stripping steps comprises a plurality of sections;
two sides of each trunk slope ramp are respectively connected with a section of mining and stripping step.
Through setting up the trunk ramp to connect one section respectively in its both sides and adopt and shell the step, convenient transportation shortens the transportation distance.
In other embodiments of the present application, the two stripping steps located on both sides of each trunk ramp are symmetrically arranged with respect to the trunk ramp.
The two sections of the mining and stripping steps positioned on the two sides of each trunk slope way are symmetrically arranged relative to the trunk slope way, so that the included angles between the two sections of the mining and stripping steps positioned on the two sides of each trunk slope way and the trunk slope way are equal, the stripping speeds on the two sides can be synchronously carried out, and balanced production is ensured.
In other embodiments of the present application, each of the main slope ramps extends in a direction away from the dump, and an included angle between each of the main slope ramps and the two stripping steps on two sides of the main slope ramp is an acute angle along the extending direction of the main slope ramp.
The included angle between each main slope ramp and the two sections of the picking and stripping steps on the two sides of each main slope ramp is set to be an acute angle, so that the length of the whole working line can be increased, and the production capacity is improved.
In other embodiments of the present application, at least one transport bridge is disposed in a mined-out area of a stope, one end of each transport bridge is connected to a dumping step, and the other end is connected to each main ramp in a one-to-one correspondence manner.
Through correspondingly connecting each transport bridge in each trunk ramp, can transport the cubic metre of earth and stone that peels off in the stope to the transport bridge along trunk ramp to transport to the refuse dump, convenient transportation shortens the transportation distance.
In other embodiments of the present application, the centerline of each transport bridge coincides with the centerline of each trunk ramp.
The center line of each transport bridge is coincided with the center line of each main slope way, so that the distance from the main slope way of the stope to the transport bridge for transporting the stripped earthwork transported in the stope is shortened, and the transportation cost is reduced.
In other embodiments of the present application, the opencast coal mine is a long and narrow opencast coal mine, and the trunk slope is one, and is connected to an end slope of each mining and stripping step; and the goaf area of the stope is provided with an operation area of mining and transporting equipment.
For some narrow open-air coal mines, a main slope ramp can be arranged only at the end slope of the mining and stripping step, so that the transportation route is shortened, and the transportation cost is reduced.
In a second aspect, the present application provides a technical solution:
a method for arranging steps for stripping and transporting roads in an open pit coal mine is characterized in that a plurality of parallel dumping steps are arranged in a dumping yard; each soil discharging step extends along a first direction, and the arrangement method comprises the following steps:
arranging a plurality of mining and stripping steps in a mining field in parallel, and enabling the extending direction of at least part of each mining and stripping step to be intersected with a first direction;
at least one main slope ramp is arranged in the stope, so that the main slope ramp extends along a second direction, and the second direction is vertical to the first direction.
The method can improve the adjustability of the annual production capacity during open pit coal mining.
In other embodiments of the present application, a mining and stripping step is respectively arranged on both sides of each trunk ramp; the included angle between each trunk slope ramp and the two sections of the picking and stripping steps on the two sides of each trunk slope ramp is an acute angle.
A section of mining and stripping step is respectively arranged on two sides of each trunk slope ramp; the included angle between each trunk slope way and the two sections of the picking and stripping steps on the two sides of the trunk slope way is an acute angle, the length of the whole working line can be increased, the production capacity is improved, the transportation distance is reduced, and the transportation cost is reduced.
In a third aspect, the present application provides a technical solution:
and advancing the mining and stripping speed of the end slope of each mining and stripping step at a first speed, and advancing the mining and stripping speed of the midpoint of each mining and stripping step at a second speed, so that the first speed is higher than the second speed, and the extending direction of the mining and stripping step formed in the mining process of each mining and stripping step is intersected with the extending direction of the soil discharging step.
By reducing the stripping speed of the middle point of each stripping step, the stripping step connected with the main slope way at an acute angle can be formed, so that the working line is increased, and the production capacity is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic structural diagram of a conventional open pit coal mining and stripping step and haulage road arrangement system;
fig. 2 is a schematic structural diagram of a opencut coal mine stripping step and haulage road arrangement system according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a bench stripping and transporting road arrangement system for an open pit coal mine according to an embodiment of the present invention;
FIG. 4 is a schematic view of another perspective of the structure of an opencast coal mine step stripping and haul road deployment system provided in an embodiment of the present application;
fig. 5 is a schematic structural view of any stripping point a of the open pit coal mining stripping step and transportation road arrangement system provided in the embodiment of the present application;
FIG. 6 is an enlarged view of point A in FIG. 5;
FIG. 7 is a schematic illustration of a stripping step of an open pit coal mine stripping step and haul road arrangement system according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram of a mining and stripping step and haulage road arrangement system of a long and narrow open pit coal mine according to an embodiment of the present disclosure;
fig. 9 is a schematic view of a bench stripping and haulage road arrangement system for an opencast coal mine according to an embodiment of the present disclosure.
Icon: 100-an open pit coal mining and stripping step and transportation road arrangement system; 110-a refuse dump; 120-stope; 130-a mined out area; 111-a dumping step; 112-transport bridges; 121-stripping steps; 122-trunk ramp.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as conventionally placed in use of the product of the application, or as conventionally understood by those skilled in the art, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Some of the terms appearing in the present application are explained below:
1. end upper: the edge sides positioned at the two ends of the moving direction of the ore body are called end sides.
2. A transport bridge: a transportation road is built between a stope and a refuse dump of an open pit coal mine.
3. A working line: the section of ore rock is ready to be formed.
4. Stope: the site for open-pit mining is formed by steps and open-pit tunnels.
5. Step picking and stripping: in surface mining, horizontal layers with a certain thickness are generally divided according to the requirements of stripping, mining or dumping operation, and mining is performed layer by layer from top to bottom, all working levels form a ladder shape in space in the mining process, and each ladder is a step or a stage. The mining and stripping step is a unit body for carrying out independent mining, stripping and dumping operation.
6. Stripping earth and stone: topsoil, rock formations and undeniable bodies in open stopes.
7. A refuse dump: and (5) stacking places for stripping earth and stone.
The open pit coal mine is used for mining coal resources by stripping earthwork, but the transportation cost generally accounts for 40-60% of the production cost in the process of stripping the earthwork at the upper part, and technicians build transportation roads (transportation bridges) at the working side of the stope and the gravity center of the refuse dump so as to save the transportation distance and further reduce the production cost. However, the inventor finds that in the current common stope, the earth-removing steps and the mining-stripping steps are arranged in parallel or approximately in parallel, so that the stripped earth and stone always need to bypass the slope roads of other mining-stripping steps which are parallel to each other, and then the stripped earth and stone can be transported to the earth-removing stope. Fig. 1 shows the transportation mode of the stripped earthwork which is common at present (the height difference exists between different stripping steps, and the exemplary elevations of the different stripping steps are shown in fig. 1). Wherein a1 and a2 are any two cut points. The S1 transportation route is a transportation route for transporting the A1 digging point to the dumping ground, and the S2 transportation route is a transportation route for transporting the A2 digging point to the dumping ground, so that the S1 transportation route and the S2 transportation route both need to detour a plurality of other stripping steps except the stripping steps where the A1 and A2 digging points are located to reach the dumping ground, the transportation distance is long, the transportation cost is high, and traffic accidents are easy to happen when the other steps are detoured.
Referring to fig. 2-8, the present embodiment provides a bench stripping and haul road deployment system 100 for an open pit coal mine. The system includes a refuse dump 110 and a stope 120. A certain goaf area 130 is provided between the refuse dump 110 and the stope 120. The goaf area 130 is provided with at least one transport bridge 112, and the stope 120 is connected to the refuse dump 110 by means of the transport bridge 112. The stripped earthwork in the stope 120 may be transported into the refuse dump 110 through the transport bridge 112.
Further, a plurality of soil discharging steps 111 which are parallel to each other are arranged in the soil discharging yard 110; each of the discharging steps 111 extends in the first direction (X direction in fig. 2). A plurality of mutually parallel stripping steps 121 and at least one trunk ramp 122 are provided in the stope 120. The extending direction of each stripping step 121 intersects the first direction. The stem ramp 122 extends in a second direction, which is perpendicular to the first direction (Y direction in fig. 2). Each stripping step 121 is connected to a trunk ramp 122. Through setting up trunk ramp 122, make each adopt and shell the step 121 and all connect in trunk ramp 122, make each adopt and shell the side of earth and stone of peeling off of point, can directly transport to trunk ramp 122 after the step 121 is shelled to the adoption that should dig the point place, then transport to refuse dump 110 from trunk ramp 122, need not bypass other adoption completely and shell the step 121, thereby greatly shortened the transport distance, the cost of transportation is reduced, also can reduce the probability that the traffic accident that the detour brought to a certain extent takes place simultaneously.
It should be noted that, in the actual operation of the coal mining field, it is difficult to ensure the absolute parallelism between the mining and stripping steps and the refuse dump. The term "parallel" is used herein in a broad sense to include "substantially parallel or approximately parallel".
Further, each stripping step 121 is connected with the trunk slope way 122 after being arranged along the extending direction intersecting with the first direction, so that the length of the working line of each stripping step 121 is increased relative to the currently common stripping step 121 parallel to the soil discharging step 111. Since the length of the working line is positively correlated with the production capacity, this arrangement allows the stope 120 to reserve a portion of the production capacity while increasing the length of the working line of the stripping step 121. For example, current months delay through year production due to force-inefficacy factors, and such diagonal arrangements of stripping steps can cause production capacity to be exceeded for each subsequent month in parallel arrangements of stripping steps.
It should be noted that, the plurality of stripping steps 121 are raised step by step, and the raising amount may be set according to actual situations. Illustratively, fig. 3 shows 5 stripping steps 121 (1-5 in fig. 2), when the height of the stripping step 2 is gradually increased, the height of the stripping step 2 is 10m higher than that of the stripping step 1, the height of the stripping step 3 is 10m higher than that of the stripping step 2, and the height of the stripping step 4 is 10m higher than that of the stripping step 3, if the height of the stripping step 1 is +1200, the height of the stripping step 2 is 1210, and so on, the height of the stripping step 5 is + 1240. Since each stripping step 121 is connected to a trunk ramp, the trunk ramp 122 has a starting end elevation of 1200 and an ending end elevation of 1240.
Likewise, 5 of the spoil steps 111 (7-11 in FIG. 4) are shown in FIG. 4 as being progressively increasing in a direction away from the stope, for example. The elevation amount of the discharging step 111 may be set according to actual circumstances.
Further, in certain embodiments of the present application, each stripping step 121 comprises multiple segments. Two sides of each trunk slope way 122 are respectively connected with a section of stripping step 121.
Through setting up trunk ramp 122 for each is adopted and is shelled the step 121 and divide into the multistage, and will every section adopt and shell the step 121 and all connect in trunk ramp 122, at the in-process of transportation, transportation equipment can adopt from each section and shell step 121 and transport to trunk ramp 122, and then will adopt to shell the side of earth and stone on the step 121 and transport to the refuse dump 110, has made things convenient for the transportation, has shortened the transportation distance, and cost of transportation reduces. Furthermore, each section of mining and stripping step 121 is connected to the main slope way 122, so that the entrance of the transportation equipment reaching the main slope way 122 from different mining and stripping steps 121 is increased, the probability of cross operation of the transportation equipment on different mining and stripping steps 121 is reduced, and the risk of transportation accidents is reduced.
Further, in the embodiment shown in fig. 2, two sides of one trunk ramp 122 are respectively connected with one stripping step 121, and the two stripping steps 121 located at two sides of one trunk ramp 122 are symmetrically arranged with respect to the trunk ramp 122.
Two sections of stripping steps 121 positioned on two sides of one trunk slope 122 are symmetrically arranged relative to the trunk slope 122, so that included angles between the two sections of stripping steps 121 positioned on two sides of one trunk slope 122 and the trunk slope 122 are equal, stripping speeds on two sides can be synchronously performed, and balanced production is ensured.
In the illustrated embodiment, referring to fig. 3, the opencast coal mine debarking step and haul road deployment system 100 includes a trunk ramp 122. The trunk ramp 122 runs through the stope 120 and the stripping steps 121 each comprise two sections. Two sections of each stripping step 121 are respectively arranged at two sides of the trunk ramp 122, and the included angle between the two sections of each stripping step 121 and the trunk ramp 122 is equal, and the two sections of each stripping step 121 are respectively symmetrically arranged at two sides of the trunk ramp 122. Further, illustratively, in the stope 120, 5 stripping steps 121 (1-5 in fig. 3) are included. The plurality of stripping steps 121 gradually increase in a direction away from the waste dump 110. Therefore, when two sections of each stripping step 121 are respectively connected to the trunk ramp 122, the trunk ramp 122 is inclined with respect to the horizontal plane and has a certain slope. The trunk ramp 122 extends to the 5 th stripping step 121 at one end and is connected to the transport bridge 112 at the other end, thereby connecting the stope 120 and the refuse dump 110 together. So that the stripped earthwork at any position of the stope 120 is transported to the transport bridge 112 through the trunk slope 122 and further to the dump 110.
It should be noted that in other alternative embodiments, the number of the trunk ramps 122 is selected according to the size of the whole opencast coal mine. Alternatively, 2, 3 or more may be provided.
Further, in some embodiments of the present disclosure, each trunk slope 122 extends away from the dump 110, and an included angle between each trunk slope 122 and the two stripping steps 121 on two sides of the trunk slope 122 is an acute angle along the extending direction of the trunk slope 122.
The included angle between each main slope ramp 122 and the two sections of the picking and stripping steps 121 on the two sides of the main slope ramp is set to be an acute angle, so that the length of the whole working line can be increased, and the production capacity is improved.
In the illustrated embodiment, a trunk ramp 122 is included in the stope 120. The main ramp 122 runs through the stope 120, each mining and stripping step 121 comprises two sections, and the mining and stripping steps 121 at the two ends form a broken line approximately. Two sections of each stripping step 121 are respectively arranged at two sides of the main slope way 122, and the included angle between the two sections of each stripping step 121 and the main slope way 122 is an acute angle. I.e. the angle beta in fig. 7 is acute. The included angle between two sections of each mining and stripping step 121 and the trunk slope 122 is an acute angle, so that the total length of each mining and stripping step 121 is greater than that of the currently common mining and stripping step arranged in parallel. When the upper stripped earthwork of any one of the stripping points in the stope 120 is carried out from the stope 120, the distance to the waste dump 110 is shorter. Specifically, with reference to fig. 5 and 6, the transportation route of the currently common stripping step 121 parallel to the dumping step 111 is b or c, and in the stripping step and transportation road arrangement system 100 for an open pit coal mine provided in the embodiment of the present application, the transportation route of the upper stripping earthwork at any point a in the stope 120 is a, the sum of two sides is greater than the third side according to the triangle theorem, and the transportation distance a is the shortest distance, that is, the shortest distance can be achieved according to the stripping step 121 and any excavation point in the middle area of the transportation road arrangement stope 120.
It should be noted that for the parallel arranged stripping steps, due to the uncertainty of the arrangement of the step ramp, the transportation equipment, such as a truck, may walk along b to an uncertain ramp, and then reach the next stripping step to continue to the step ramp, and the transportation distance may be c transportation route, (route c in fig. 6) the transportation distance of the c transportation route is between a and b. Therefore, the embodiment of the application can realize the shortest transportation distance and reduce the transportation cost.
Further, in some embodiments of the present disclosure, the mined-out area 130 of the stope 120 is provided with at least one transport bridge 112, and one end of each transport bridge 112 is connected to the dumping step 111 and the other end is connected to each of the trunk ramps 122 in a one-to-one correspondence.
By connecting one end of each transport bridge 112 to each trunk ramp 122, the upper stripped earthwork in the stope 120 can be transported to the transport bridge 112 along the trunk ramp 122 to be transported to the dump 110.
Further, the centerline of each transport bridge 112 coincides with the centerline of each trunk ramp 122.
The centerline of each transport bridge 112 is coincident with the centerline of each trunk ramp 122, so that the distance that the upper stripped earthwork transported from within the stope 120 is transported from the trunk ramp 122 of the stope 120 to the transport bridge 112 is shortened, thereby reducing transportation costs.
In the illustrated embodiment, the opencast coal mine debarking step and haul road deployment system 100 includes a haul bridge 112. The transport bridge 112 is connected at one end to the dumping step 111 and at the other end to the trunk ramp 122. The trunk ramp 122 is disposed along the extension of the centerline of the transport bridge 112. Two sides of the main slope ramp 122 are respectively provided with a section of stripping step 121. Thus, the distance that the upper stripped earthwork transported from the stope 120 is transported from the trunk ramp 122 of the stope 120 to the transport bridge 112 is shortest, thereby reducing the transportation cost.
Further, in some embodiments of the present application, depending on the actual situation of the opencast coal mine, for example, the long and narrow opencast coal mine, the goaf between the stope and the dump has insufficient equipment working space, in order to ensure the normal and smooth production, one trunk ramp 122 may be selected, and the trunk ramp 122 is connected to the end slope of each stripping step 121. Specifically, for some relatively narrow open-pit coal mines, a trunk ramp 122 may be provided only at the end slope of the stripping bench 121. At this time, each stripping step 121 includes only one segment. I.e., connected to the stem ramp 122 in an angled fashion. Referring to fig. 8, the removed earthwork can be transported along the route a or the route c in the figure, the mining area is provided with areas for mining, transporting and transferring of the transporting vehicle, the mining area does not need to be provided with a transportation bridge, and the coal mining operation can be continuously and stably operated.
In other alternative embodiments of the present application, where the opencast coal mine is large in size and wide, the transport bridge 112 and the trunk ramp 122 are optionally provided in plurality. A plurality of transport bridges 112 are parallel to each other, and each transport bridge 112 is connected to each stripping step 121. Each of the trunk ramps 122 is parallel to each other, and the pick-and-peel step 121 section on one side of each of the trunk ramps 122 is connected to the pick-and-peel step 121 on the opposite side of the next trunk ramp 122 to form a continuous pick-and-peel step. Referring to fig. 9, the stripping steps 121 throughout the open-pit coal mine form a series of stripping steps, e1-e5 in fig. 9, respectively.
In other alternative embodiments of the present application, an end slope transportation road can be optionally arranged on each end slope of the stripping step 121, so as to further facilitate transportation.
In other alternative embodiments of the present application, the included angle between each trunk ramp 122 and the two stripping steps 121 on two sides of the trunk ramp 122 may also be an obtuse angle. The length of the working line of the stripping step 121 can be increased, thereby improving the productivity.
The application embodiment provides a method for arranging steps and a transportation road in an open pit coal mine, which comprises the following steps:
a plurality of mutually parallel soil discharging steps are arranged in the soil discharging field; each soil discharging step extends along a first direction, and the arrangement method comprises the following steps:
arranging a plurality of mining and stripping steps in a mining field in parallel, and enabling the extending direction of at least part of each mining and stripping step to be intersected with a first direction;
at least one main slope ramp is arranged in the stope, so that the main slope ramp extends along a second direction, and the second direction is vertical to the first direction.
According to the method, the length of each mining and stripping step is increased, so that the working line is increased, the production capacity is increased, and the annual production capacity adjustability during open pit coal mining can be improved.
In some embodiments of the present application, a stripping step is respectively disposed on two sides of each trunk ramp; the included angle between each trunk slope ramp and the two sections of the picking and stripping steps on the two sides of each trunk slope ramp is an acute angle.
A section of mining and stripping step is respectively arranged on two sides of each trunk slope ramp; the included angle between each trunk slope way and the two sections of the picking and stripping steps on the two sides of the trunk slope way is an acute angle, the length of the whole working line can be increased, the production capacity is improved, the transportation distance is reduced, and the transportation cost is reduced.
The mining method for the stripping steps of the open pit coal mine comprises the steps of advancing the stripping speed of the end slope of each stripping step at a first speed, advancing the stripping speed of the middle point of each stripping step at a second speed, and enabling the first speed to be larger than the second speed, so that the extending direction of the stripping step formed in the mining process of each stripping step is intersected with the extending direction of the soil discharging step.
By reducing the stripping speed of the middle point of each stripping step, the stripping step connected with the main slope way at an acute angle can be formed, so that the working line is increased, and the production capacity is improved.
Further, in other alternative embodiments of the present application, other alternative methods may be used to implement the stripping step in which the main ramp is connected at an acute angle.
It should be noted that, after the main slope ramp and the mining stripping step form a certain acute angle relationship, the mining operation is continued by adopting a mode that the first speed is equal to the second speed, so that the overall propulsion is realized, and the production capacity is ensured. In addition, the angle of the acute angle formed by the main slope way and the mining and stripping step is adjusted according to the coal mine production capacity.
Referring to fig. 2-8, the capacity of an opencast coal mine step and haul road deployment system provided by some embodiments of the present application is calculated as follows:
monthly coal mining productivity Q is monthly propulsion strength multiplied by working line length multiplied by average thickness of coal bed multiplied by volume weight of coal
Q=m×f×n×r (1)
Q-monthly coal mining productivity m3
m-monthly propulsion intensity m
f-length of working line m
n-average thickness of coal bed m
r-volume weight of coal t/m3
m=(q×X1)/(t×X2×n×r) (2)
m-monthly propulsion intensity m
q-excavator Equipment Capacity m3
X1-number of devices
t-width of working area of single excavator
X2Number of working areas
n-average thickness of coal bed m
r-volume weight of coal t/m3
For a coal mining working line, when the angle of a mining stripping step is not adjusted, the monthly coal mining production capacity is Q;
when the two wing mining and stripping steps of the central line of the stope are adjusted by a certain angle on the basis of the original working line f, a working line e is formed, the adjustment angle is beta, namely the length e of the working line:
e=f/cosβ (3)
e-adjusted working line length m
Beta-angle of adjustment, 0 ° < beta <90 °
E > f due to 0 < beta <90 DEG
The increment of the working line is e-f, if the number of excavator equipment is not increased, the monthly coal mining production capacity is constant, if the monthly coal mining production capacity is adjusted, the (f/cos beta-f)/t working areas can be increased to the maximum extent, the (f/cos beta-f)/t excavators are correspondingly increased, and the increment of the number of the excavators, namely delta x1, and the increment of the number of the mining areas, namely delta x2 are respectively as follows:
Δx1=(f/cosc-f)/t (4)
Δx2=(f/cosc-f)/t (5)
the monthly propulsion intensity is increased by
Δm=(q×Δx1)/(t×Δx2×n×r) (6)
The increment of the monthly coal mining production capacity is
ΔQ=Δm×(e-f)×n×r (7)
The above calculation of the production capacity of coal mining and the monthly capability of stripping earthwork are the same as the above calculation mode, and the stripping capacity can be adjusted in time according to production planning, thereby ensuring balanced production.
The open pit coal mine step stripping and transportation road arrangement system can effectively improve the production capacity, can increase the production capacity in time according to production planning, and ensures balanced production.
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 (9)

1. A step stripping and transportation road arrangement system for an open pit coal mine is characterized by comprising a refuse dump and a stope;
a plurality of mutually parallel soil discharging steps are arranged in the soil discharging field; each soil discharging step extends along a first direction;
a plurality of mutually parallel mining and stripping steps and at least one main slope ramp are arranged in the stope; the extending direction of at least part of each stripping step is intersected with the first direction; the main slope way extends along a second direction, and the second direction is vertical to the first direction; each mining and stripping step is connected with the main slope ramp;
each mining and stripping step comprises a plurality of sections;
two sides of each trunk slope way are respectively connected with a section of mining and stripping step.
2. The opencast coal mine debarking step and haul road deployment system of claim 1,
the two sections of the mining and stripping steps positioned on the two sides of each main slope way are symmetrically arranged relative to the main slope ways.
3. The opencast coal mine debarking step and haul road deployment system of claim 1,
each trunk slope way extends towards the direction far away from the refuse dump, and the included angle between each trunk slope way and the two sections of the mining and stripping steps on the two sides of the trunk slope way is an acute angle along the extending direction of the trunk slope way.
4. The opencast coal mine debarking step and haul road deployment system of claim 1,
and the mined-out area of the stope is provided with at least one transport bridge, one end of each transport bridge is connected with the soil discharging step, and the other end of each transport bridge is connected with each main slope ramp in a one-to-one correspondence manner.
5. The opencast coal mine debarking step and haul road placement system of claim 4,
the central line of each transport bridge is coincident with the central line of each trunk ramp.
6. The opencast coal mine debarking step and haul road deployment system of claim 1,
the open pit coal mine is a narrow and long open pit coal mine, the number of the trunk slope ramps is one, and the trunk slope ramps are connected to the end slope of each mining stripping step; and the mined-out area of the stope is provided with an operation area of mining and transporting equipment.
7. A method for arranging steps and a transportation road in an opencast coal mine comprises the steps that a plurality of mutually parallel dumping steps are arranged in a dumping yard of the opencast coal mine; each of the soil discharging steps extends in a first direction, and the arranging method includes:
arranging a plurality of mining and stripping steps in a mining field in parallel, and enabling the extending direction of at least part of each mining and stripping step to be intersected with the first direction;
arranging at least one trunk slope ramp in a stope, and enabling the trunk slope ramp to extend along a second direction, wherein the second direction is vertical to the first direction;
each mining and stripping step is connected with the main slope ramp;
each mining and stripping step comprises a plurality of sections;
two sides of each trunk slope way are respectively connected with a section of mining and stripping step.
8. The method for stripping steps and transporting a roadway in an opencast coal mine according to claim 7,
and the included angle between each trunk slope way and the two sections of the mining and stripping steps on the two sides of the trunk slope way is an acute angle.
9. A method of mining a opencast coal mine, comprising:
each mining and stripping step is connected with a main slope ramp;
each mining and stripping step comprises a plurality of sections;
two sides of each trunk slope way are respectively connected with a section of mining and stripping step;
and advancing the mining and stripping speed of the end slope of each mining and stripping step at a first speed, advancing the mining and stripping speed of the midpoint of each mining and stripping step at a second speed, and enabling the first speed to be higher than the second speed, so that the extending direction of the mining and stripping step formed in the mining process of each mining and stripping step is intersected with the extending direction of the soil discharging step.
CN201910523880.3A 2019-06-17 2019-06-17 Open pit coal mine step mining and stripping and transportation road arrangement system and method and mining method Active CN110107299B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910523880.3A CN110107299B (en) 2019-06-17 2019-06-17 Open pit coal mine step mining and stripping and transportation road arrangement system and method and mining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910523880.3A CN110107299B (en) 2019-06-17 2019-06-17 Open pit coal mine step mining and stripping and transportation road arrangement system and method and mining method

Publications (2)

Publication Number Publication Date
CN110107299A CN110107299A (en) 2019-08-09
CN110107299B true CN110107299B (en) 2020-12-25

Family

ID=67495317

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910523880.3A Active CN110107299B (en) 2019-06-17 2019-06-17 Open pit coal mine step mining and stripping and transportation road arrangement system and method and mining method

Country Status (1)

Country Link
CN (1) CN110107299B (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103256051A (en) * 2013-05-14 2013-08-21 中国煤炭科工集团太原研究院 Double-wing continuous coal mining technique for open-pit coal mine
CN103670419A (en) * 2013-11-20 2014-03-26 中国矿业大学 Run-through inner dumping method between mining areas for opencast coal mine during period of diversion
CN104143284A (en) * 2014-07-06 2014-11-12 陈亚军 Deep-concave strip mine production model system
CN104806247A (en) * 2015-04-28 2015-07-29 中国矿业大学 Transport method of building longitudinal composite bridge in middle of strip mine stope
CN104847359A (en) * 2015-03-10 2015-08-19 云南磷化集团有限公司 Open air combined transportation process for stripped waste stones of phosphate ore by car and large-scale slope skip bucket
CN105626068A (en) * 2015-12-30 2016-06-01 中国神华能源股份有限公司 Dismantling method of open-pit coal mine end slope bridge
CN106593448A (en) * 2016-12-20 2017-04-26 中国神华能源股份有限公司 Mining method for surface coal mine
CN106761759A (en) * 2016-12-28 2017-05-31 中国神华能源股份有限公司 A kind of coal-mining method of open coal mine
CN108716402A (en) * 2018-05-21 2018-10-30 中国矿业大学 A kind of Semicontinuous Technology in Surface Coal Mines intermediate axle arrangement

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103256051A (en) * 2013-05-14 2013-08-21 中国煤炭科工集团太原研究院 Double-wing continuous coal mining technique for open-pit coal mine
CN103670419A (en) * 2013-11-20 2014-03-26 中国矿业大学 Run-through inner dumping method between mining areas for opencast coal mine during period of diversion
CN104143284A (en) * 2014-07-06 2014-11-12 陈亚军 Deep-concave strip mine production model system
CN104847359A (en) * 2015-03-10 2015-08-19 云南磷化集团有限公司 Open air combined transportation process for stripped waste stones of phosphate ore by car and large-scale slope skip bucket
CN104806247A (en) * 2015-04-28 2015-07-29 中国矿业大学 Transport method of building longitudinal composite bridge in middle of strip mine stope
CN105626068A (en) * 2015-12-30 2016-06-01 中国神华能源股份有限公司 Dismantling method of open-pit coal mine end slope bridge
CN106593448A (en) * 2016-12-20 2017-04-26 中国神华能源股份有限公司 Mining method for surface coal mine
CN106761759A (en) * 2016-12-28 2017-05-31 中国神华能源股份有限公司 A kind of coal-mining method of open coal mine
CN108716402A (en) * 2018-05-21 2018-10-30 中国矿业大学 A kind of Semicontinuous Technology in Surface Coal Mines intermediate axle arrangement

Also Published As

Publication number Publication date
CN110107299A (en) 2019-08-09

Similar Documents

Publication Publication Date Title
CN103216238A (en) Open pit coal mine mining process
CN104790956A (en) Remote control heading machine tunnel type or fully-mechanized top coal exploitation end slope coal technology
CN102889084B (en) Continuous mining technique for thin coal layer of opencast coal mine
CN103388478B (en) Forming method for transportation road of bucket shovel applied to open pit coal mine
CN104806247A (en) Transport method of building longitudinal composite bridge in middle of strip mine stope
CN102278115A (en) High-efficiency safe environment-friendly mining method for rare shallow-buried ore layer in irregular strip-shaped distribution
CN106968672A (en) The cutting kerve method on precut shield top is carried out to ore body
CN104358574A (en) Horizontal room-and-pillar mining method of slightly inclined orebody
US4466669A (en) Method of open cut mining
CN109458181A (en) A kind of filling mining method of metallic ore across pitch full-seam mining
US10082025B2 (en) System for the reduction in applied energy, improved efficiencies and reduced costs in open pit mining
AU2015100065A4 (en) A System for the Reduction in Applied Energy, Improved Efficiencies and Reduced Costs in Open Pit Mining
US5427439A (en) Surface mining conveyor system
CN110107299B (en) Open pit coal mine step mining and stripping and transportation road arrangement system and method and mining method
CN103244121B (en) Track and trackless coupled bottom ore removal system
AU2014100343B4 (en) A System for the Reduction in Applied Energy, Improved Efficiencies and Reduced Costs in Open Pit Mining
RU2425220C1 (en) Method for formation of steeply inclined transport access track
RU2231642C1 (en) Method of barring and development of elongated in width and gradient coal fields with flat dipping and inclined beds of big thickness
RU2118456C1 (en) Quarry development method
Egerton Presidential address: The mechanisation of UG2 mining in the Bushveld Complex
RU2652038C1 (en) Method for storing overburden in burrow cut
CN110984991B (en) Method for moving intermediate bridge of open stope
RU2294433C1 (en) Method for closely located ore bodies cutting with separate pits
CN111894584B (en) Cemented filling mining method for fully-pseudo-arranged reserved roadway of slowly-inclined thin ore body
CN210664171U (en) Blasting big gun hole structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant