A mining tunnel with underground transformer and distribution room and its construction method

Abstract

The present invention belongs to the technical field of tunnel engineering, and provides a mining tunnel including an underground transformer and distribution room and a construction method thereof. The mining tunnel includes two main line tunnels, a transverse passage, an underground transformer and distribution room, and a cable introduction shaft. The two main line tunnels are arranged in parallel, the transverse passage is arranged perpendicular to the main line tunnels, and the two ends of the transverse passage are respectively connected to the two main line tunnels. The underground transformer and distribution room is located in the middle of the transverse passage, and its length extension direction is perpendicular to the length direction of the transverse passage, and is built together with the transverse passage. The bottom end of the cable introduction shaft is connected to the underground transformer and distribution room, and its top end is close to the ground line. In the mining tunnel of the present invention, the underground transformer and distribution room structure is arranged in the transverse passage and is built together with the transverse passage, which saves land. The cable is directly connected to the underground transformer and distribution room from the ground through the cable introduction shaft, which is convenient for construction and saves investment, and is worthy of large-scale promotion.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a mining tunnel including an underground transformer and distribution room and a construction method thereof. Background Art

[0002] There are many devices in the tunnel that need power supply. At present, for tunnels with a length of no more than 1.3 kilometers, a substation can be set up at the entrance or exit to supply power to the tunnel; for tunnels with a length of 1.3 to 3 kilometers, a substation is generally set up at the entrance and exit to supply power to the tunnel; and for tunnels with a length of more than 3 kilometers, an underground substation must be set up in the tunnel. There is no clear practice in the industry for the setting of underground substations in tunnels. Summary of the invention

[0003] The object of the present invention is to provide a mining tunnel containing an underground transformer and distribution room and a construction method thereof which saves land, is convenient to construct and requires less investment.

[0004] The present invention is implemented as follows: a mining tunnel containing an underground transformer and distribution room comprises two main line tunnels, a transverse passage, an underground transformer and distribution room and a cable introduction shaft; the two main line tunnels are arranged in parallel, the transverse passage is arranged perpendicular to the main line tunnels, the two ends of the transverse passage are respectively connected to the two main line tunnels, the underground transformer and distribution room is located in the middle of the transverse passage, and the length extension direction of the underground transformer and distribution room is perpendicular to the length direction of the transverse passage, and the underground transformer and distribution room are built together with the transverse passage; the bottom end of the cable introduction shaft is connected to the underground transformer and distribution room, and the top end of the cable introduction shaft is close to the ground line.

[0005] Furthermore, the underground transformer and distribution room is formed by expanding the horizontal passage toward one side.

[0006] Furthermore, the bottom of the underground power substation is horizontal, and maintenance roads are provided on both sides of the transverse passage, and the bottom elevation of the underground power substation is not lower than the maintenance roads.

[0007] Furthermore, a wall is arranged on the outer side of the underground power distribution room, and a fireproof partition wall is arranged on the side of the underground power distribution room close to the transverse passage to separate the underground power distribution room from the transverse passage, and the fire resistance limit of the fireproof partition wall is not less than 2.0h.

[0008] Furthermore, the construction area of ​​the underground transformer and distribution room is not more than 200 square meters, and a door opening is set at the fireproof partition wall as an ingress and egress passage, and a fire door is provided at the door opening, and the grade of the fire door is not lower than Class B.

[0009] Furthermore, the waterproof grade of the underground substation is level one, and a lining is provided on the outer side of the wall away from the wall of the underground substation, a drainage ditch is provided between the wall away from the wall and the lining, and a pavement drainage system is provided in the transverse passage, and the drainage ditch is connected to the pavement drainage system of the transverse passage.

[0010] Furthermore, the cable introduction well is located in the rock and soil outside the underground power transformation and distribution room, and the cable introduction well includes a vertical introduction well and a horizontal connecting channel, one end of the horizontal connecting channel is connected to the vertical introduction well, and the other end is connected to the underground power transformation and distribution room; the top of the vertical introduction well is closed, and a waterproof casing is provided for cable access.

[0011] Furthermore, the cross-sections of the vertical cable introduction shaft and the horizontal connecting channel of the cable introduction shaft are both circular, with an outer diameter of not less than 1.2m.

[0012] Furthermore, when the depth of the vertical cable introduction well is not more than 25m, it is constructed by manual digging.

[0013] In order to solve the above technical problems, the present invention also provides a construction method of the above mining method tunnel, which comprises the following steps:

[0014] S1. Construction of the two main line tunnels;

[0015] S2, constructing the transverse passage from the main line tunnel towards each other and connecting it;

[0016] S3, digging laterally in the middle of the horizontal passage to complete the lining construction of the underground transformer and distribution room;

[0017] S4, constructing a vertical cable introduction well from the ground downwards;

[0018] S5, constructing a horizontal connecting passage of the cable introduction shaft from the underground transformer and distribution room, and connecting it with the vertical introduction shaft;

[0019] S6. Construct the above-mentioned free-standing wall and fireproof partition wall;

[0020] S7. Install equipment and cables to complete the construction.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The mining tunnel of the present invention includes an underground transformer and distribution room, wherein the underground transformer and distribution room structure is arranged in a transverse passage and is built together with the transverse passage, thereby saving land. The cable is directly connected to the underground transformer and distribution room from the ground through a cable introduction well, which facilitates construction, saves investment, and is worthy of large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the plan structure of a mining method tunnel including an underground power distribution room provided by an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 The cross-sectional schematic diagram of the underground transformer and distribution room in the mining tunnel is shown;

[0025] Figure 3 yes Figure 1 The longitudinal section diagram of the underground transformer and distribution room in the mining tunnel is shown. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figures 1 to 3 , showing a preferred embodiment provided by the present invention, a mining method tunnel including an underground transformer and distribution room, comprising two main line tunnels 1, a cross passage 2, an underground transformer and distribution room 3 and a cable introduction shaft 4.

[0029] The two main line tunnels 1 are arranged in parallel, and the transverse passage 2 is arranged perpendicular to the main line tunnel 1. Both ends of the transverse passage 2 are respectively connected to the two main line tunnels 1. The underground transformer room 3 is located in the middle of the transverse passage 2, and the length extension direction of the underground transformer room 3 is perpendicular to the length direction of the transverse passage 2. The underground transformer room 3 is built together with the transverse passage 2. Specifically, the underground transformer room 3 is formed by expanding the transverse passage 2 to one side.

[0030] The bottom end of the cable introduction shaft 4 is connected to the underground transformer and distribution room 3, and the top of the cable introduction shaft 4 is close to the ground line. In this embodiment, the cable introduction shaft 4 is located in the rock and soil outside the underground transformer and distribution room 3, and the cable introduction shaft 4 includes a vertical introduction shaft 41 and a horizontal connecting channel 42, which together form an L-shape. One end of the horizontal connecting channel 42 is connected to the vertical introduction shaft 41, and the other end is connected to the underground transformer and distribution room 3; the top of the vertical introduction shaft 41 is closed, and a waterproof casing is provided for cable access. Preferably, the cross-sections of the vertical introduction shaft 41 and the horizontal connecting channel 42 are both circular, with an outer diameter of not less than 1.2m. When the depth of the vertical introduction shaft 41 is not more than 25m, manual digging construction can be adopted.

[0031] The bottom of the underground power distribution room 3 is horizontal, and maintenance roads are set on both sides of the horizontal passage 2. The bottom elevation of the underground power distribution room 3 is not lower than the maintenance road.

[0032] A wall 31 is arranged outside the underground transformer and distribution room 3, and a fireproof partition wall 32 is arranged on one side of the underground transformer and distribution room 3 close to the horizontal passage 2 to separate it from the horizontal passage 2. The fire resistance limit of the fireproof partition wall 32 is not less than 2.0h.

[0033] The construction area of ​​the underground transformer and distribution room 3 is not more than 200 square meters, and a door opening is set at the fireproof partition wall 32 as an ingress and egress passage. A fire door is installed at the door opening, and the grade of the fire door is not lower than Class B.

[0034] The waterproof grade of the underground transformer room 3 is level 1, and a lining 33 is also provided on the outer side of the wall 31 of the underground transformer room 3. A drainage ditch 34 is provided between the wall 31 and the lining 33, and a road drainage system is provided in the transverse passage 2, and the drainage ditch 34 is connected to the road drainage system of the transverse passage 2.

[0035] This embodiment also provides the above-mentioned mining method tunnel construction method, which includes the following steps:

[0036] S1, construction of two main line tunnels 1;

[0037] S2, construct the cross passage 2 from the main line tunnel 1 and connect it;

[0038] S3, dig laterally in the middle of the horizontal passage 2 to complete the lining 33 construction of the underground transformer room 3;

[0039] S4, constructing a vertical cable introduction well 41 from the ground downwards;

[0040] S5, construct the horizontal connecting channel 42 of the cable introduction shaft 4 from the underground transformer and distribution room 3, and connect it with the vertical introduction shaft 41;

[0041] S6, construct the wall 31 and the fireproof partition wall 32;

[0042] S7. Install equipment, cables, etc. to complete the construction.

[0043] The present embodiment is a mining method tunnel containing an underground transformer and distribution room, in which the underground transformer and distribution room 3 is structured in a transverse passage and built together with the transverse passage 2, saving land. The cable is directly connected to the underground transformer and distribution room 3 from the ground through a cable introduction shaft 4, which is convenient for construction, saves investment, and is worthy of large-scale promotion.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mining tunnel with underground transformer and distribution room, including two main line tunnels, characterized in that: The mining tunnel also includes a cross passage, an underground power distribution room and a cable introduction shaft; The two main line tunnels are arranged in parallel, the transverse passage is arranged perpendicular to the main line tunnels, the two ends of the transverse passage are respectively connected to the two main line tunnels, the underground power distribution room is located in the middle of the transverse passage, and the length extension direction of the underground power distribution room is perpendicular to the length direction of the transverse passage, and the underground power distribution room is built together with the transverse passage; The bottom end of the cable introduction well is connected to the underground power transformer and distribution room, and the top of the cable introduction well is close to the ground line; the underground power transformer and distribution room is formed by expanding the horizontal passage to one side; the cable introduction well is located in the rock and soil body outside the underground power transformer and distribution room, and the cable introduction well includes a vertical introduction well and a horizontal connecting passage, one end of the horizontal connecting passage is connected to the vertical introduction well, and the other end is connected to the underground power transformer and distribution room; the top of the vertical introduction well is closed, and a waterproof casing is provided for cable access.

2. The mining tunnel according to claim 1, characterized in that: The bottom of the underground power distribution room is horizontal, and maintenance roads are arranged on both sides of the transverse passage. The bottom elevation of the underground power distribution room is not lower than the maintenance roads.

3. The mining tunnel according to claim 1, characterized in that: A wall is arranged outside the underground power distribution room, and a fireproof partition wall is arranged on the side of the underground power distribution room close to the horizontal passage to separate the underground power distribution room from the horizontal passage. The fire resistance limit of the fireproof partition wall is not less than 2.0h.

4. The mining tunnel according to claim 3, characterized in that: The construction area of ​​the underground transformer and distribution room is not more than 200 square meters, and a door opening is set at the fireproof partition wall as an ingress and egress passage. A fire door is set at the door opening, and the grade of the fire door is not lower than Class B.

5. The mining tunnel according to claim 4, characterized in that: The waterproof grade of the underground substation is level one. A lining is provided on the outer side of the wall away from the wall of the underground substation. A drainage ditch is provided between the wall away from the wall and the lining. A pavement drainage system is provided in the transverse passage. The drainage ditch is connected to the pavement drainage system of the transverse passage.

6. The mining tunnel according to claim 1, characterized in that: The cross-sections of the vertical cable introduction shaft and the horizontal connecting channel of the cable introduction shaft are both circular, with an outer diameter of not less than 1.2m.

7. The mining tunnel according to claim 1, characterized in that: When the depth of the vertical cable introduction well is not more than 25m, it is constructed by manual digging.

8. A method for constructing a tunnel using a mining method as claimed in claim 1, characterized in that: The following steps are involved: S1. Construction of the two main line tunnels; S2, constructing the transverse passage from the main line tunnel towards each other and connecting it; S3, digging laterally in the middle of the horizontal passage to complete the lining construction of the underground transformer and distribution room; S4, constructing a vertical cable introduction well from the ground downwards; S5, constructing a horizontal connecting passage of the cable introduction shaft from the underground transformer and distribution room, and connecting it with the vertical introduction shaft; S6. Construction of free-standing walls and fireproof partition walls; S7. Install equipment and cables to complete the construction.

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