Ventilation structure for downward horizontal layering drift filling mining of deep metal mine

Abstract

The utility model provides a ventilation structure for downward horizontal layered drift filling mining of a deep metal mine, and belongs to the field of deep mining of metal mines. Comprising a plurality of subsection transportation roadways, a lower subsection connection roadway used for communicating an access stope with a mine hanging wall and a mine footwall, and a ventilation inclined shaft used for communicating an upper subsection connection roadway with the lower subsection connection roadway; the ventilation inclined shaft is arranged in a filling body near footwall surrounding rock, the extending direction of the ventilation inclined shaft is parallel to the contact face of the footwall surrounding rock and the filling body, and the ventilation inclined shaft is formed by splicing a plurality of hard pipe fittings. A first air duct extending to the tunnel face of the access stope along the roadway and a first fan connected with the first air duct are arranged in the lower section connection roadway; and a second air duct which extends to the communication part of the second section transportation roadway and the upper section connection roadway along the roadway and a second fan which is connected with the second air duct are arranged in the upper section connection roadway. According to the structure, the air return path is shortened, the construction difficulty is remarkably reduced, and the construction cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of deep mining of metal mines, and particularly relates to a ventilation structure for downward horizontal slice entry filling mining of deep metal mines. BACKGROUND

[0002] With the development of non-ferrous metal mines gradually progressing to the deep, the mining depth of the mining area gradually reaches 1000m or deeper, and some even reaches 1500m or deeper. Among them, the deep mining of inclined or steeply inclined metal mines often adopts downward horizontal slice entry filling mining method, that is, the ore is mined from top to bottom in sections.

[0003] In the process of deep mining, the air existing in the mine is self-compressed, the heat source such as ground temperature and equipment will make the mining environment temperature too high, which will seriously affect the production efficiency. In view of the problem of too high mining temperature, many domestic and foreign mining enterprises have tried many measures, such as increasing the ventilation section, local refrigeration equipment, full-system cold water cooling, increasing local fan and other methods, but the cost is relatively high. The downward horizontal slice entry filling mining method usually adopts the method of arranging the air return shaft in the lower wall surrounding rock to reduce the mining temperature, but this method needs to construct the air return shaft in the surrounding rock alone, which not only has high construction cost, but also has the problem of long air return path, and the cooling effect still needs to be improved.

[0004] Therefore, it is necessary to design a ventilation structure for downward horizontal slice entry filling mining of deep metal mines to solve the above problems. SUMMARY

[0005] In view of the technical problems in the background art, the present application provides a ventilation structure for downward horizontal slice entry filling mining of deep metal mines, which sets the ventilation inclined shaft in the filling body near the lower wall surrounding rock, and the length can be adjusted, without the need for separate construction, and can be constructed with each layer of mining. Compared with the traditional method of constructing the ventilation inclined shaft in the surrounding rock before mining, the structure provided by the present application shortens the air return path, is conducive to reducing the temperature in the mining area, and the layer-by-layer construction not only can significantly reduce the construction difficulty, but also greatly reduces the construction cost.

[0006] The embodiment of the present application provides a ventilation structure of a deep metal mine downward horizontal layered route filling mining, which comprises a plurality of sectional transportation roads, a lower sectional connecting road for connecting a route type stope and an upper disc of a mine field and a lower disc of the mine field, and a ventilation inclined shaft for connecting the upper sectional connecting road and the lower sectional connecting road; the ventilation inclined shaft is arranged in a filling body near the lower disc surrounding rock, and the extension direction is parallel to the contact surface of the lower disc surrounding rock and the filling body; the ventilation inclined shaft is spliced by a plurality of hard pipes; the inside of the lower sectional connecting road is provided with a first air duct extending to the working face of the route type stope along the roadway and a first fan connected with the first air duct; and the inside of the upper sectional connecting road is provided with a second air duct extending to the connection position of the second sectional transportation road and the upper sectional connecting road along the roadway and a second fan connected with the second air duct.

[0007] Further, the lower sectional connecting road is connected with the first sectional transportation road, and the upper sectional connecting road is connected with the second sectional transportation road.

[0008] Further, the distance between the ventilation inclined shaft and the lower disc surrounding rock is less than or equal to the width of a single route type stope.

[0009] Further, the width of the single route type stope is 3-5m.

[0010] Further, the ventilation inclined shaft penetrates through an artificial false roof of the lower sectional connecting road and protrudes into the inside of the lower sectional connecting road.

[0011] Further, the ventilation inclined shaft protrudes 10-20cm into the inside of the lower sectional connecting road.

[0012] Further, the cross-sectional diameter of the ventilation inclined shaft is 0.8-1.2m.

[0013] Further, the first fan is located at the connection position of the lower sectional connecting road and the first sectional transportation road.

[0014] Further, the second fan is located at the connection position of the upper sectional connecting road and the ventilation inclined shaft.

[0015] The beneficial effects of the present application are as follows:

[0016] The present application provides a ventilation structure of a deep metal mine downward horizontal layered route filling mining, which sets the ventilation inclined shaft in the filling body near the lower disc surrounding rock, and the length can be adjusted, without separate construction, and can be constructed layer by layer with the mining. Compared with the traditional method of constructing the ventilation inclined shaft in the surrounding rock before mining, the structure provided by the present application shortens the air return path, is beneficial to reduce the temperature in the stope, and the layer-by-layer construction not only can significantly reduce the construction difficulty, but also greatly reduces the construction cost.

[0017] The application also separates the fresh air flow from the polluted air flow for delivery by reasonably arranging the fan and the air duct, so as to avoid the fresh air flow from being polluted. When the mining heading roadway is excavated, the fresh air flow enters the lower sub-transport roadway through the first sub-transport roadway, the first fan in the lower sub-transport roadway pressurizes the fresh air flow into the first air duct, and the fresh air flow is delivered along the roadway to the working face of the heading mining field. The polluted air in the mining field enters the ventilation shaft near the lower disc surrounding rock along the lower sub-transport roadway, and is sucked into the second air duct by the second fan arranged at the communication between the upper sub-transport roadway and the ventilation shaft, is delivered along the roadway to the second sub-transport roadway, and is finally delivered to the outside of the mining area.

[0018] The above description is only a summary of the technical scheme of the application. In order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the application, the drawings used in the application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0020] Fig. 1 Cross-sectional structure schematic diagram of the ventilation structure of the downward horizontal layered heading roadway filling mining in deep metal mines;

[0021] Fig. 2 Cross-sectional structure schematic diagram of the ventilation structure of the downward horizontal layered heading roadway filling mining in deep metal mines; DETAILED DESCRIPTION

[0022] The embodiments of the technical scheme of the application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the application, and therefore only serve as examples, and cannot limit the protection scope of the application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the application; the terms "include" and "have" in the specification and claims of the application and the above drawing description, and any modification thereof, are intended to cover non-exclusive inclusion.

[0024] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0025] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0027] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0028] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0029] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] In the deep mining process, the air self-compression, ground temperature and equipment heat source existing in the mine will make the stope environment temperature too high, which will seriously affect the production efficiency. The downward horizontal slice drift filling mining method often uses the way of arranging the air return shaft in the lower wall rock to reduce the stope temperature. However, this method needs to construct the air return shaft in the surrounding rock separately, which not only has high construction cost, but also has the problem of long air return path, and the cooling effect still needs to be improved.

[0031] In order to solve the above technical problems, the ventilation structure of the downward horizontal slice drift filling mining in deep metal mine is provided, which sets the ventilation inclined shaft in the filling body near the lower wall rock, and the length can be adjusted, without separate construction, and can be constructed with layer-by-layer stoping. Compared with the traditional method of constructing the ventilation inclined shaft in the surrounding rock before mining, the structure provided by the application shortens the air return path, is beneficial to reduce the temperature in the stope, and the layer-by-layer construction not only can significantly reduce the construction difficulty, but also greatly reduces the construction cost.

[0032] Please refer to Figs. 1-2 The ventilation structure of the downward horizontal slice drift filling mining in deep metal mine provided by the application includes a plurality of sub-transport lanes, a lower sub-communication lane 7 for connecting the slice drift stope 11 and the upper wall of the mine and the lower wall of the mine, and a ventilation inclined shaft 12 for connecting the upper sub-communication lane 8 and the lower sub-communication lane 7.

[0033] In the embodiment of the application, the ventilation inclined shaft 12 is arranged in the filling body 10 near the lower wall rock 13, and the extension direction is parallel to the contact surface of the lower wall rock 13 and the filling body 10. Specifically, one end of the ventilation inclined shaft 12 is connected with the upper sub-communication lane 8, and the other end extends along the contact surface of the lower wall rock 13 and the filling body 10 to the deep part of the ore body 9, until it penetrates through the artificial false roof of the lower sub-communication lane 7 and protrudes into the inside of the lower sub-communication lane 7. More specifically, the ventilation inclined shaft 12 protrudes 10-20 cm into the inside of the lower sub-communication lane 7.

[0034] In the embodiment of the application, the ventilation inclined shaft 12 is spliced by a plurality of hard pipe joints. The material of the hard pipe joint can meet the requirement of keeping the structure of the ventilation inclined shaft 12 stable in the filling body 10. The length of the hard pipe joint can be cut according to actual needs. Preferably, the hard pipe joint can be a hard cylindrical corrugated pipe. In actual mining operation, the ventilation inclined shaft 12 does not need to be constructed in the lower wall rock 13 in advance, and can be constructed with layer-by-layer stoping, which is relatively simple in construction method and low in cost. Specifically, layer-by-layer construction means that after completing the stoping of one slice, one end of the hard pipe joint with a length equal to the height of the slice is connected with the protruding end of the ventilation inclined shaft 12, and the other end penetrates through the artificial false bottom of the slice, so that the extended ventilation inclined shaft 12 protrudes 10-20 cm into the inside of the communication lane of the next slice, the ventilation structure construction of the next slice is completed, and then filling is performed.

[0035] In the embodiment of the present application, the cross-sectional diameter of the ventilation inclined shaft 12 is 0.8-1.2 m to meet the air return section requirement.

[0036] In the embodiment of the present application, the distance between the ventilation inclined shaft 12 and the lower disc surrounding rock 13 is less than or equal to the width of the single-entry type stope 11. The width of the single-entry type stope 11 is 3-5 m. The construction mode of the ventilation inclined shaft 12 is to construct layer by layer with the stoping. If the distance exceeds the width of the single-entry type stope 11, the hard pipe needs to be installed before the backfill operation of the second last stope, which will cause the last stope to be unable to return air.

[0037] In the embodiment of the present application, the lower sublevel connecting roadway 7 is communicated with the first sublevel transportation roadway 1, the inside of the lower sublevel connecting roadway 7 is provided with the first air duct 5 extending along the roadway to the working face of the entry type stope 11 and the first fan 3 connected with the first air duct 5, and the first fan 3 is located at the communication position of the lower sublevel connecting roadway 7 and the first sublevel transportation roadway 1. The working face refers to the working face continuously advancing forward in the process of excavating a tunnel in coal mining, mining or tunnel engineering. In actual operation, the length of the first air duct 5 is adjusted according to the construction progress (the position of the working face) at any time. In this way, the first air duct 5 and the first fan 3 form a forced ventilation, the fresh air flow entering the lower sublevel connecting roadway 7 through the first sublevel transportation roadway 1 is forced into the first air duct 5, and is transported along the roadway to the working face of the entry type stope 11.

[0038] In the embodiment of the present application, the upper sublevel connecting roadway 8 is communicated with the second sublevel transportation roadway 2, the inside of the upper sublevel connecting roadway 8 is provided with the second air duct 6 extending along the roadway to the communication position of the second sublevel transportation roadway 2 and the upper sublevel connecting roadway 8 and the second fan 4 connected with the second air duct 6, and the second fan 4 is located at the communication position of the upper sublevel connecting roadway 8 and the ventilation inclined shaft 12. In this way, the second air duct 6 and the second fan 4 form an exhaust ventilation, the dirty air in the stope is extracted into the second air duct 6 after entering the upper sublevel connecting roadway 8 through the lower sublevel connecting roadway 7 and the ventilation inclined shaft 12, and is transported along the roadway to the second sublevel transportation roadway 2 and finally to the outside of the mining area.

[0039] The working principle of the ventilation structure of the deep metal mine downward horizontal sublevel entry filling mining provided in the present application is as follows: when excavating and mining the entry, the fresh air flow enters the lower sublevel connecting roadway 7 through the first sublevel transportation roadway 1, the first fan 3 in the lower sublevel connecting roadway 7 forces the fresh air flow into the first air duct 5, and the fresh air flow is transported along the roadway to the working face of the entry type stope 11. The dirty air in the stope enters the ventilation inclined shaft 12 near the lower disc surrounding rock 13 along the lower sublevel connecting roadway 7, and is extracted into the second air duct 6 by the second fan 4 located at the communication position of the upper sublevel connecting roadway 8 and the ventilation inclined shaft 12, and is transported along the roadway to the second sublevel transportation roadway 2 and finally to the outside of the mining area.

[0040] When the last entry-type stope 11 of the layer is mined, one end of the hard pipe with the same height as the layer is connected with the protruding end of the ventilation inclined shaft 12, the other end penetrates the artificial false floor of the layer, the extended ventilation inclined shaft 12 protrudes 10-20 cm into the next layer of the connecting roadway, and the entry-type stope 11 is filled. In this way, the connecting roadway of the next layer is connected with the upper segment connecting roadway 8, that is, the ventilation structure construction of the next layer is completed. This way of constructing the ventilation inclined shaft 12 layer by layer is conducive to reducing the construction difficulty and reducing the cost, and the ventilation inclined shaft 12 is arranged near the lower disc surrounding rock 13, which can shorten the air return path and is conducive to reducing the temperature of the working face.

[0041] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and embodiments having the same technical idea and playing the same role and effect within the scope of the technical solutions of the present application are all included in the technical scope of the present application. In addition, within the scope of the main idea of the present application, various modifications that can be thought of by those skilled in the art are applied to the embodiments, and other ways constructed by combining part of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A ventilation structure for downward horizontal stratified entry filling mining of deep metal mines, characterized in that, The system includes several segmented transport roadways, a lower segmented connecting roadway for connecting the access stope and the hanging wall and footwall of the mine, and a ventilation inclined shaft for connecting the upper segmented connecting roadway and the lower segmented connecting roadway. The ventilation inclined shaft is located in the backfill near the footwall surrounding rock and extends parallel to the contact surface between the footwall surrounding rock and the backfill. The ventilation inclined shaft is assembled from several rigid pipes. The lower segmented connecting roadway has a first ventilation duct extending along the roadway to the working face of the access stope and a first fan connected to the first ventilation duct. The upper segmented connecting roadway has a second ventilation duct extending along the roadway to the connection point between the second segmented transport roadway and the upper segmented connecting roadway and a second fan connected to the second ventilation duct.

2. The ventilation structure for downward horizontal stratified entry filling mining of deep metal mines according to claim 1, characterized in that, The lower segment connecting lane is connected to the first segment transport lane, and the upper segment connecting lane is connected to the second segment transport lane.

3. The ventilation structure for downward horizontal stratified entry filling mining of deep metal mines according to claim 1, characterized in that, The distance between the ventilation shaft and the footwall surrounding rock is less than or equal to the width of a single-access stope.

4. The ventilation structure for downward horizontal stratified entry and backfilling mining of deep metal mines according to claim 3, characterized in that, The width of the single-access mining area is 3-5 meters.

5. The ventilation structure for downward horizontal stratified entry filling mining of deep metal mines according to claim 1, characterized in that, The ventilation shaft passes through the artificial false roof of the lower segment connecting tunnel and extends into the interior of the lower segment connecting tunnel.

6. The ventilation structure for downward horizontal stratified entry and backfilling mining of deep metal mines according to claim 5, characterized in that, The ventilation inclined shaft protrudes 10-20cm into the interior of the lower segment connecting tunnel.

7. The ventilation structure for downward horizontal stratified entry filling mining of deep metal mines according to claim 1, characterized in that, The cross-sectional diameter of the ventilation inclined shaft is 0.8-1.2m.

8. The ventilation structure for downward horizontal stratified entry filling mining of deep metal mines according to claim 2, characterized in that, The first fan is located at the junction of the lower segment connecting roadway and the first segment transport roadway.

9. The ventilation structure for downward horizontal stratified entry filling mining of deep metal mines according to claim 2, characterized in that, The second fan is located at the connection between the upper section connecting roadway and the ventilation inclined shaft.

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