Ventilation structure of access stope

Abstract

The utility model relates to a ventilation structure of an access stope, and relates to the technical field of mine ventilation. According to the ventilation structure of the access stope, by arranging the hanging wall air return linkage channel and the footwall air return linkage channel, fresh air can be introduced through the footwall air return linkage channel, dirty air is discharged through the hanging wall air return linkage channel, and a one-way circulation path for exhausting air through the air return courtyard is formed; and the invalid connection gateway engineering amount can be effectively reduced, the excavation amount is reduced, and the construction efficiency is improved. Meanwhile, the panel air return connecting way is arranged to communicate with the air return courtyard to form penetrating air flow, the air return path can be shortened, and the ventilation efficiency of the stope is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine ventilation, in particular to a ventilation structure of an entry type stope. BACKGROUND

[0002] In the field of underground mining of metal mines, when the mechanized panel entry filling mining method is adopted, the local ventilation of the single-end stope is a key technical problem.

[0003] At present, local fans are generally used in combination with flexible air ducts for ventilation, but there is a problem of poor reliability of ventilation facilities: the flexible air ducts are easily damaged during frequent movement and filling operations in the stope, resulting in increased wind pressure loss and limited effective ventilation distance, and the filling operation needs to repeatedly disassemble and assemble the air duct, causing interruption of ventilation, making it difficult to form stable through air flow, and serious accumulation of dust and harmful gases.

[0004] In the prior art, although attempts have been made to alleviate the problem by optimizing the material of the air duct, the dynamic coordination problem between the ventilation system and the mining process has not been fundamentally solved, especially during the filling stage, continuous ventilation cannot be guaranteed, which seriously affects the mining efficiency and operation safety. CONTENT OF THE UTILITY MODEL

[0005] To solve or partially solve the problems in the related art, the present application provides a ventilation structure of an entry type stope, which can effectively reduce the engineering quantity of invalid connecting channels, improve construction efficiency and ensure construction safety, can form through air flow in the stope, and effectively improve the ventilation efficiency of the stope.

[0006] The present application provides a ventilation structure of an entry type stope, comprising:

[0007] an upper panel return air channel, which is arranged in the direction of the middle section roadway towards the upper panel of the ore body, and is connected with an external return air system;

[0008] a lower panel return air channel, which is arranged in the direction of the middle section roadway towards the lower panel of the ore body, and is connected with an external fresh air system;

[0009] a return air shaft, which is arranged on the upper panel side of the ore body, and has the same inclination and angle as the ore body, and the two ends of the return air shaft are connected with the upper panel return air channel and the lower panel return air channel respectively;

[0010] a panel return air connecting channel, which is connected with the return air shaft;

[0011] A partition wall is arranged between the panel return air connecting channel and each main entry of the sublevel stoping, a ventilation opening is reserved at the bottom of the partition wall, and a prefabricated air duct with airtight ends is pre-buried, wherein the partition wall is constructed and arranged during the filling of the ore room of the sublevel stoping.

[0012] Optionally, in some embodiments of the present application:

[0013] The two ends of the air return shaft are provided with variable-diameter air ducts;

[0014] The variable-diameter air ducts are narrow in the middle and wide at both ends, so as to accelerate airflow passing through.

[0015] Optionally, in some embodiments of the present application:

[0016] The communication part of the upper disc air return link with the air return shaft is provided with a first air fan;

[0017] The communication part of the lower disc air return link with the air return shaft is provided with a second air fan.

[0018] Optionally, in some embodiments of the present application:

[0019] The shaft diameter of the air return shaft is 1-2 m, and the air return shaft is 5-10 m away from the ore body boundary in the plane.

[0020] Optionally, in some embodiments of the present application:

[0021] The prefabricated air duct is a hard air duct, and the material of the hard air duct is any one of PVC, galvanized steel pipe, iron sheet, etc. The hard air duct is pre-buried in the filling empty area floor and the partition wall bottom, and is sealingly connected with the partition wall reserved ventilation opening.

[0022] The technical scheme provided by the present application can include the following beneficial effects:

[0023] By setting the upper disc air return link and the lower disc air return link, the present application can introduce fresh air through the lower disc air return link, and discharge dirty air through the upper disc air return link, forming a one-way circulation path of air exhaust through the air return shaft. At the same time, by controlling the air return shaft to be consistent with the shape of the ore body, the engineering quantity of the invalid connection channel can be effectively reduced, the excavation quantity can be reduced, and the construction efficiency can be improved. At the same time, by setting the disc area air return connection channel to communicate with the air return shaft to form a through air flow, the air return path can be shortened, and the ventilation efficiency of the stope can be improved.

[0024] By setting the variable-diameter air ducts at both ends of the air return shaft, the narrow middle section of the variable-diameter air duct can form a high-speed low-pressure area, which can increase the airflow speed to effectively improve the ventilation efficiency of the air return shaft. By setting the first air fan and the second air fan, the second air fan is controlled to supply air to the air return shaft, and the first air fan is controlled to exhaust air from the air return shaft, which can further form a negative pressure exhaust effect in the air return shaft, and improve the ventilation efficiency in the stoping tunnel.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and in which:

[0027] Fig. 1 is a sectional structure diagram of the ventilation structure of the approach type stope in the embodiment of the present application;

[0028] Fig. 2 is a plan structure diagram of the ventilation structure of the approach type stope in the embodiment of the present application;

[0029] Fig. 3 is a structure diagram of the variable-diameter air duct in the embodiment of the present application.

[0030] Reference Signs:

[0031] 1 - upper disc return air link; 2 - lower disc return air link; 3 - return air raise; 4 - middle section level way; 5 - mine outlet communication way; 6 - partition wall; 7 - main approach; 8 - disc area return air link; 9 - ventilation port; 10 - prefabricated air duct; 11 - fresh air flow; 12 - dirty air; 13 - variable-diameter air duct; 1301 - connecting disc; 14 - first fan; 15 - second fan. DETAILED DESCRIPTION

[0032] Embodiments of the present application will be described in more detail by referring to the drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0033] It should be understood that although the terms "first", "second", "third", etc. can be employed in this application to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one piece of information from another piece of information of the same type. For example, the first information can also be called the second information without departing from the scope of the present application, and similarly, the second information can also be called the first information. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0034] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0035] Unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] At present, local fan is generally used with flexible air duct for ventilation, but there is a problem of poor reliability of ventilation facilities: the flexible air duct is easy to be damaged in the frequent movement of the stope and the filling operation, resulting in increased wind pressure loss and limited effective ventilation distance, and the filling operation needs to repeatedly disassemble and assemble the air duct, causing interruption of ventilation, making it difficult to form stable through air flow, and serious accumulation of dust and harmful gas.

[0037] In the prior art, although attempts have been made to alleviate the problem by optimizing the material of the air duct, the dynamic cooperation problem between the ventilation system and the mining process has not been fundamentally solved, especially in the filling stage, which cannot guarantee continuous ventilation, seriously affecting the mining efficiency and operation safety.

[0038] In view of the above problems, the ventilation structure of the access type stope provided in the embodiments of the present application can effectively reduce the engineering quantity of invalid connecting passages, improve the construction efficiency and ensure the construction safety, can form through air flow in the stope, and effectively improve the ventilation efficiency of the stope.

[0039] The technical solutions of the embodiments of the present application are described in detail below with reference to the drawings.

[0040] Fig. 1 is a sectional structure schematic diagram of the ventilation structure of the access type stope in the embodiments of the present application;

[0041] Fig. 2 is a planar structure schematic diagram of the ventilation structure of the access type stope in the embodiments of the present application;

[0042] Fig. 3 is a structure schematic diagram of the variable diameter air duct in the embodiments of the present application.

[0043] Referring toFigs. 1-3 A ventilation structure of an in-road stope, comprising:

[0044] An upper disc return air link 1 arranged in the direction of the upper disc of the middle section roadway 4, the upper disc return air link 1 being connected to the external return air system;

[0045] A lower disc return air link 2 arranged in the direction of the lower disc of the middle section roadway 4, the lower disc return air link 2 being connected to the external fresh air system;

[0046] A return air shaft 3 arranged on the upper disc side of the ore body, the return air shaft 3 having the same inclination and angle as the ore body, and the two ends of the return air shaft 3 being connected to the upper disc return air link 1 and the lower disc return air link 2 respectively.

[0047] In the embodiment, by arranging the upper disc return air link 1 and the lower disc return air link 2, fresh air can be introduced through the lower disc return air link 2, and dirty air 12 can be discharged through the upper disc return air link 1, forming a one-way circulation path for discharging air through the return air shaft 3. At the same time, by controlling the return air shaft 3 to be consistent with the shape of the ore body, the amount of invalid connecting channel engineering can be effectively reduced, the excavation amount can be reduced, and the construction efficiency can be improved.

[0048] Specifically, the shaft diameter of the return air shaft 3 is 1-2m, and the return air shaft 3 is 5-10m away from the ore body boundary in the plane.

[0049] In the embodiment, with a 60m middle section as the section height, the return air shaft 3 is constructed in the direction of the upper disc of the ore body from the upper and lower middle section planes along the vein, is constructed by a reverse drilling machine on the upper disc side of the ore body, has a shaft diameter of 1-2m, has the same inclination and angle as the ore body, is controlled to be 5-10m away from the ore body boundary in the plane, and penetrates the upper and lower middle section connecting channels. By controlling the shaft diameter of the return air shaft 3 and the distance from the ore body boundary, the disturbance to the surrounding rock caused by excavation can be reduced under the premise of meeting the air volume demand, and the construction safety can be ensured.

[0050] Specifically, the two ends of the return air shaft 3 are provided with a variable-diameter air duct 13; the variable-diameter air duct 13 has a structure of narrow in the middle and wide at both ends to speed up airflow. The variable-diameter air duct 13 is provided with a connecting disc 1301 at both ends to facilitate installation of the variable-diameter air duct 13 in the return air shaft 3.

[0051] In the embodiment, by arranging the variable-diameter air duct 13 at both ends of the return air shaft 3, the narrow middle section of the variable-diameter air duct 13 can form a high-speed low-pressure area, which can increase the airflow speed to effectively improve the ventilation efficiency of the return air shaft 3.

[0052] A disc area return air connecting channel, which is connected to the return air shaft 3;

[0053] The partition wall 6 is provided between the district return air connection and each sublevel mining main access 7, a ventilation opening 9 is reserved at the bottom of the partition wall 6, and a prefabricated air duct 10 with sealed two ends is pre-embedded.

[0054] In the embodiment, the main access 7 and the district return air connection are constructed first during sublevel mining, through-ventilation is formed by connecting the return air raise 3 through the district return air connection, the return air path is shortened, and the ventilation efficiency of the stope is improved, wherein the fresh air flow 11 enters the stope along the vein roadway in the lower district, the dirty air 12 is discharged into the upper district return air connection 1 through the mine outlet roadway main access 7 and the return air raise 3, and finally discharged for treatment through the upper district return air connection 1. When filling the first stope, a partition wall 6 is built between the district return air connection and the main access 7, a φ1m ventilation opening 9 is reserved at the bottom of the partition wall 6, and a prefabricated air duct 10 is pre-embedded in the empty area floor and the bottom of the partition wall 6. Similarly, before filling the subsequent stope empty area, the prefabricated air duct 10 is extended to connect the adjacent partition wall 6, forming a continuous ventilation channel. After sublevel mining is completed, the ventilation opening 9 reserved in the early stage is sealed before the finishing empty area is filled, to prevent the filling material from entering the return air raise 3, and at the same time, the finishing partition wall 6 does not reserve the ventilation opening 9 and the connecting prefabricated air duct 10, to prevent air leakage.

[0055] Specifically, the prefabricated air duct 10 is a hard air duct, the material of the hard air duct is PVC, galvanized steel pipe, iron sheet or any other material, and the hard air duct is pre-embedded in the filling empty area floor and the bottom of the partition wall 6, and is sealed and connected with the ventilation opening 9 reserved in the partition wall 6.

[0056] In the embodiment, the material of the hard air duct is hard PVC material, the ventilation cross section is stabilized by pre-embedding the hard air duct, and the influence of the filling body on the ventilation effect is avoided.

[0057] Specifically, the upper district return air connection 1 is provided with a first fan 14 at the connection with the return air raise 3, and the lower district return air connection 2 is provided with a second fan 15 at the connection with the return air raise 3.

[0058] In the embodiment, by setting the first fan 14 and the second fan 15, the second fan 15 is controlled to supply air to the return air raise 3, and the first fan 14 is controlled to exhaust air from the return air raise 3, so that a negative pressure exhaust effect can be further formed in the return air raise 3, and the ventilation efficiency in the mining roadway is improved.

[0059] The technical scheme of the embodiment of the application has the following beneficial effects:

[0060] The application can introduce fresh air through the lower disc return air connecting channel 2 and discharge dirty air 12 through the upper disc return air connecting channel 1, form a one-way circulation path of exhaust air through the return air shaft 3, and effectively reduce the engineering quantity of invalid connecting channels, reduce the excavation amount, and improve the construction efficiency by controlling the return air shaft 3 to be consistent with the ore body shape. Meanwhile, by setting the disc area return air connecting channel to communicate with the return air shaft 3 to form a through air flow, the return air path can be shortened, and the ventilation efficiency of the stope can be improved.

[0061] The application can improve the ventilation efficiency of the return air shaft 3 by setting the variable-diameter air duct 13 at both ends of the return air shaft 3, and the narrow middle section of the variable-diameter air duct 13 can form a high-speed low-pressure area to improve the airflow speed. By setting the first fan 14 and the second fan 15, the second fan 15 is controlled to supply air to the return air shaft 3, and the first fan 14 is controlled to exhaust air to the return air shaft 3, which can further form a negative pressure exhaust effect in the return air shaft 3 and improve the ventilation efficiency of the recovery tunnel.

[0062] Finally, it should be noted that in this document, relationships such as first and second, and the like, are merely used to distinguish one entity or action from another, and do not necessarily require or imply any actual relationship or order between or among such entities or actions. Moreover, the terms including, including, or any other variant thereof are intended to cover non-exclusive inclusion, such that processes, methods, articles, or apparatuses including a series of elements include not only those elements, but also other elements not explicitly listed, or inherent to such processes, methods, articles, or apparatuses.

[0063] The above has described the embodiments of the application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles, practical application, or improvement of technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. An airway system for a drift mine, characterized in that The application relates to a ventilation structure of a route type stope, which comprises the following parts: an upper disc air return channel (1) arranged on the upper disc of a middle section drift (4) and connected with an external air return system; a lower disc air return channel (2) arranged on the lower disc of the middle section drift (4) and connected with an external fresh air system; an air return shaft (3) arranged on the upper disc of a mine body, the inclination and the angle of the air return shaft (3) being consistent with those of the mine body, and the two ends of the air return shaft (3) being connected with the upper disc air return channel (1) and the lower disc air return channel (2) respectively; a disc air return communication channel connected with the air return shaft (3); a partition wall (6) arranged between the disc air return communication channel and each main route (7) of a sublevel stoping, a ventilation opening (9) reserved at the bottom of the partition wall (6) and a prefabricated air duct (10) with both ends sealed being embedded, wherein the partition wall (6) is arranged during the filling of a mine chamber of the sublevel stoping.

2. The ventilation structure of the route type stope according to claim 1, wherein: the two ends of the air return shaft (3) are provided with variable-diameter air ducts (13); the variable-diameter air ducts (13) are of a structure with a narrow middle and wide ends, so as to accelerate the airflow.

3. The ventilation structure of the route type stope according to claim 2, wherein: a first air fan (14) is arranged at the connection between the upper disc air return channel (1) and the air return shaft (3); a second air fan (15) is arranged at the connection between the lower disc air return channel (2) and the air return shaft (3).

4. The ventilation structure of the route type stope according to claim 3, wherein: the shaft diameter of the air return shaft (3) is 1-2 m, and the air return shaft (3) is 5-10 m away from the boundary of the mine body in the plane.

5. The ventilation structure of the route type stope according to claim 4, wherein: the prefabricated air duct (10) is a hard air duct, the material of the hard air duct being any one of PVC, galvanized steel pipe and iron sheet, and the hard air duct being embedded in the filling empty area bottom plate and the partition wall (6) bottom plate and being in sealed connection with the ventilation opening (9) reserved in the partition wall (6).

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