A super-large slope reverse slope slag discharging system and slag discharging method

Abstract

The present invention provides a super-large slope reverse slope slag discharge system, which relates to the technical field of tunnel excavation construction. A feeding belt conveyor is arranged at a horizontal excavation section, with a head end used for receiving materials and a tail end used for discharging materials; a convex arc fixed belt conveyor is arranged at the tail of the horizontal excavation section, with a head end receiving the slag transported by the upper feeding belt conveyor or the main machine belt conveyor arranged on the excavator; an inclined chute is arranged at an inclined shaft excavation section, with a top end used for receiving the slag transported by the convex arc fixed belt conveyor, and a bottom end used for outputting the slag to the lower feeding belt conveyor. The slag is transported obliquely downward through the inclined chute, falls to the lower feeding belt conveyor, and is transported horizontally through the upper feeding belt conveyor, so that continuous transportation can be achieved. The inclined shaft excavation section adopts an inclined chute to transport the slag, which can avoid wear on the conveyor belt, reduce the probability of damage, and can continuously and stably transport the slag. The present invention also provides a slag discharge method, which can achieve the same technical effect.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel excavation construction, and further relates to a super-large slope reverse slope slag discharge system. In addition, the present invention also relates to a slag discharge method. Background Art

[0002] During the construction of rock tunnel boring machines (TBMs), slag removal for tunnels with a slope greater than 30° has always been a difficult problem. There are two main methods of slag removal: one is belt conveyor slag removal, i.e. main machine belt conveyor + rear supporting belt conveyor + continuous belt conveyor; the other is flatbed trolley slag removal, i.e. main machine belt conveyor + rear supporting belt conveyor + flatbed trolley.

[0003] When discharging slag from a traditional belt conveyor at a very steep slope, the slag and conveyor belt will slide relative to each other, increasing the installation and maintenance costs of the belt conveyor. In addition, the belt conveyor's transportation capacity will be limited during the inclined shaft stage, and the belt conveyor's advantages cannot be fully utilized. The belt conveyor cannot fully adapt to the excavation speed of the entire machine, resulting in a longer construction period. As the belt conveyor has many parts and components, daily maintenance is complicated and labor costs are high. In addition, the failure rate is high. Once a failure occurs, the entire machine needs to be shut down for maintenance, which greatly slows down the construction progress. The belt conveyor has the problem of slag falling during operation, which is difficult to avoid and is not conducive to civilized construction.

[0004] The transport capacity of traditional slag transport vehicles is also limited in the super-large slope stage, and it is necessary to install a traction winch, a special walking device and a guide rail, which increases the installation and maintenance costs, increases the complexity of the equipment, and increases the construction cost and danger. When using a flatbed truck to discharge slag, it is necessary to build a corresponding lifting device, which makes the efficiency of flatbed truck slag transportation extremely low. In addition, the slag unloading position of the flatbed truck is fixed, which requires the slag unloading site to meet all the cave slag generated during the entire excavation operation, which will greatly increase the construction cost.

[0005] For technicians in this field, how to achieve continuous and stable slag output during large-slope excavation is a technical problem that needs to be solved at present. Summary of the invention

[0006] The present invention provides a super-large slope reverse slope slag discharge system, which can realize continuous and stable slag discharge during large slope excavation. The specific scheme is as follows:

[0007] A super-large slope reverse slope slag discharge system, comprising:

[0008] The feeding belt conveyor is set in the horizontal excavation section, with the head end used for receiving materials and the tail end for discharging materials;

[0009] The convex arc fixed belt conveyor is arranged at the tail of the horizontal excavation section, and the head end receives the slag conveyed by the upper feeding belt conveyor or the main machine belt conveyor arranged on the excavator; the length of the convex arc fixed belt conveyor can be extended;

[0010] The inclined chute is arranged in the inclined shaft excavation section, and the top end is used to receive the slag transported by the convex arc fixed belt conveyor, and the bottom end is used to output the slag to the lower feeding belt conveyor.

[0011] Optionally, the inclined chute is provided with a middle buffer device and a safety buffer bin at the bottom of the cave;

[0012] The middle buffer device includes a flexible high-strength chain, a spring buffer block, and a rotating baffle to prevent the slag from impacting and damaging the inclined chute;

[0013] The safety buffer bin at the bottom of the tunnel is anchored to the tunnel wall, the bottom is filled with loose gravel, and sound insulation cotton and rubber are arranged on the outside to reduce noise and shock absorption; to prevent the slag from impacting and damaging the belt conveyor below; the safety buffer bin at the bottom of the tunnel adopts side slag discharge, and the slag outlet is equipped with a pneumatic gate.

[0014] Optionally, a quick-release cover is provided on the top of the inclined chute, and each inclined chute is provided with a visual window.

[0015] Optionally, it further comprises a detachable transverse slag transfer belt conveyor, wherein the transverse slag transfer belt conveyor is arranged at the horizontal excavation section of the lowest layer, and the length direction of the transverse slag transfer belt conveyor is perpendicular to the length direction of the feeding belt conveyor of the lowest layer;

[0016] The head end of the transverse slag conveyor receives the slag conveyed by the main conveyor, and the tail end is used to cooperate with the feeding conveyor at the lowest layer to connect and transport materials;

[0017] The transverse slag transfer belt conveyor moves synchronously with the main machine belt conveyor.

[0018] Optionally, it further comprises a detachable rear supporting belt conveyor, which is arranged at the horizontal excavation section of the lowest level, the length direction of the rear supporting belt conveyor is parallel to the length direction of the feeding belt conveyor of the lowest level, and the height of the rear supporting belt conveyor is higher than the height of the feeding belt conveyor;

[0019] The head end of the rear supporting belt conveyor receives the slag conveyed by the main belt conveyor, and the tail end is used to cooperate with the transverse slag transfer belt conveyor to transport materials.

[0020] Optionally, the convex arc fixed belt conveyor, the main machine belt conveyor, the transverse slag transfer belt conveyor, and the rear matching belt conveyor are all corrugated sidewall belt conveyors.

[0021] Optionally, the inclined chute includes a U-shaped channel steel, angle steels are arranged at the edges of the channel steel, and connecting plates are respectively arranged at both ends of the channel steel.

[0022] The present invention also provides a slag discharging method, comprising:

[0023] S1. A feeding belt conveyor and a transverse slag transfer belt conveyor are arranged at the lowest level of the horizontal excavation section. The excavator conveys the soil to the transverse slag transfer belt conveyor through the main machine belt conveyor, and then the soil is transported to the slag transport vehicle through the feeding belt conveyor;

[0024] S2, in the transition stage of digging the inclined shaft excavation section, a rear supporting belt conveyor is arranged in the horizontal excavation section, the head end of the rear supporting belt conveyor receives the slag conveyed by the main belt conveyor, and the tail end conveys the slag to the horizontal slag transfer belt conveyor;

[0025] S3, when digging the inclined shaft excavation section, an inclined chute is set in the inclined shaft excavation section, when the material dropping point of the main machine belt conveyor passes over the material receiving point of the slag transport vehicle, the main machine belt conveyor discharges slag into the inclined chute, and the inclined chute transports slag to the feeding belt conveyor;

[0026] S4. When excavating from the inclined shaft excavation section to the top horizontal excavation section, a convex arc fixed belt conveyor is arranged, and the main belt conveyor discharges debris to the convex arc fixed belt conveyor; a feeding belt conveyor is arranged, and when the drop point of the main belt conveyor passes over the convex arc fixed belt conveyor, the main belt conveyor discharges debris to the feeding belt conveyor.

[0027] The present invention provides a super-large slope reverse slope slag discharge system, in which a feeding belt conveyor is arranged at a horizontal excavation section, the head end is used for receiving materials, and the tail end is used for discharging materials; a convex arc fixed belt conveyor is arranged at the tail of the horizontal excavation section, and the head end receives the slag transported by the upper feeding belt conveyor or the main machine belt conveyor arranged at the excavator; an inclined chute is arranged at the inclined shaft excavation section, the top end is used to receive the slag transported by the convex arc fixed belt conveyor, and the bottom end is used to output the slag to the lower feeding belt conveyor. The slag is transported obliquely downward through the inclined chute, falls to the lower feeding belt conveyor, and is transported horizontally through the upper feeding belt conveyor, so that continuous transportation can be achieved. The inclined shaft excavation section adopts an inclined chute to transport the slag, which can avoid wear on the conveyor belt, reduce the probability of damage, and can continuously and stably transport the slag. The present invention also provides a slag discharge method, which can achieve the same technical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the front view structure of the super-large slope reverse slope slag discharge system provided by the present invention;

[0030] Figure 2 This is a top view schematic diagram of the starting horizontal excavation section of the lower flat tunnel;

[0031] Figure 3 This is a front view schematic diagram of the initial turning stage of the lower flat tunnel;

[0032] Figure 4 It is a front view schematic diagram of the lower inclined shaft excavation section;

[0033] Figure 5 A schematic diagram of the cross section of an inclined chute.

[0034] The figure includes:

[0035] Feeding belt conveyor 1, convex arc fixed belt conveyor 2, inclined chute 3, channel steel 3.1, angle steel 3.2, connecting plate 3.3, bottom safety buffer bin 3.4, main machine belt conveyor 4, horizontal slag transfer belt conveyor 5, and rear supporting belt conveyor 6. DETAILED DESCRIPTION

[0036] The core of the present invention is to provide a super-large slope reverse slope slag discharge system, which can realize continuous and stable slag discharge during large slope excavation.

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the ultra-large slope reverse slope slag discharge system of the present invention will be further introduced and explained in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Combination Figure 1 , the present invention provides a super-large slope reverse slope slag discharge system, which is applied to the excavation process with a large slope; Figure 1 The figure shows a total of five sections: the lower horizontal tunnel excavation section A, the lower inclined shaft excavation section B, the middle horizontal tunnel excavation section C, the upper inclined shaft excavation section D, and the upper horizontal tunnel excavation section E. The five sections are excavated in order from low to high. The excavated tunnel is mainly formed by alternating horizontal excavation sections and inclined shaft excavation sections. Figure 1 Only five sections are used for demonstration. The actual excavation process may include more sections, which can be repeated in sequence. Figure 1 The excavation direction is generally from right to left, and the slag discharge direction is from left to right.

[0039] The super-large slope reverse slope slag discharge system of the present invention comprises a feeding belt conveyor 1, a convex arc fixed belt conveyor 2, an inclined chute 3 and other structures. The feeding belt conveyor 1 is arranged in the horizontal excavation section, and the feeding belt conveyor 1 is arranged in a horizontal direction for conveying slag in a horizontal direction; the head end ( Figure 1 The left end of the middle) is used for receiving materials, and the tail end of the feeding belt conveyor 1 ( Figure 1 The middle right end) is used for discharging.

[0040] The convex arc fixed belt conveyor 2 is arranged at the tail of the horizontal excavation section. The convex arc fixed belt conveyor 2 is arranged in the transition area between the tail of the horizontal excavation section and the top of the inclined shaft excavation section. The head end of the convex arc fixed belt conveyor 2 receives the slag transported by the upper feeding belt conveyor 1 or the main belt conveyor 4 arranged on the excavator. The length of the convex arc fixed belt conveyor 2 can be extended and retracted. The convex arc fixed belt conveyor 2 is arranged in an "L" shape. The tail end of the convex arc fixed belt conveyor 2 has a turning section that tilts downward. The tail end of the convex arc fixed belt conveyor 2 tilts downward to feed the material, so that the slag is accurately delivered to the inclined chute 3. The length of the feeding belt conveyor 1 is shorter than the length of the horizontal excavation section. The feeding belt conveyor 1 cannot deliver the slag to the inclined chute 3. With the help of the convex arc fixed belt conveyor 2 as an intermediate transfer structure, the transfer of slag from the horizontal excavation section to the inclined shaft excavation section is realized.

[0041] The inclined chute 3 is arranged in the inclined shaft excavation section, which extends obliquely, and an inclined shaft excavation section is arranged between the upper and lower horizontal excavation sections as a transition; the top end is used to receive the slag transported by the convex arc fixed belt conveyor 2, and the bottom end is used to output the slag to the lower feeding belt conveyor 1. The inclined chute 3 itself does not have a motion mechanism, and the slag inside the inclined chute 3 slides downward by gravity.

[0042] The super-large slope reverse slope slag discharge system of the present invention relies on the mutual cooperation between the feeding belt conveyor 1, the convex arc fixed belt conveyor 2, and the inclined chute 3. The feeding belt conveyor 1 discharges the slag to the convex arc fixed belt conveyor 2, and the convex arc fixed belt conveyor 2 discharges the slag to the inclined chute 3. The slag discharged from the inclined chute 3 is sent to the feeding belt conveyor 1 of the next layer, and the above process is repeated. The slag is finally output through multiple stages in the above order and discharged from the feeding belt conveyor 1 on the lowest layer to the slag transport vehicle (indicated by X in the figure) to complete the transfer.

[0043] The inclined chute 3 is provided with a middle buffer device and a bottom safety buffer bin 3.4; the middle buffer device includes a flexible high-strength chain, a spring buffer block, and a rotating baffle, and the middle buffer device is formed by a combination of one or more of the flexible high-strength chain, the spring buffer block, and the rotating baffle; to prevent the slag from causing impact damage to the inclined chute 3 itself. The bottom safety buffer bin 3.4 is anchored to the wall of the tunnel, and the bottom is filled with loose gravel. Sound insulation cotton and rubber are set on the outside to reduce noise and shock absorption; to prevent the slag from impacting and damaging the belt conveyor below. The bottom safety buffer bin 3.4 adopts side slag discharge, and the slag outlet is equipped with a pneumatic gate. The slag discharge amount can be adjusted by adjusting the opening of the pneumatic gate. The slag speed can be controlled by setting the bottom safety buffer bin 3.4, reducing the impact of slag on the feeding belt conveyor.

[0044] Furthermore, the present invention provides a quick-release cover plate on the top of the inclined chute 3, and the quick-release cover plate and the inclined chute 3 form a cylindrical channel with four sides closed. Each inclined chute 3 is equipped with a visual window to observe the state of slag and stone, which is convenient for quick slag removal.

[0045] Combination Figure 2 , Figure 2 It is a schematic diagram in the top view direction; the present invention also includes a detachable transverse slag transfer belt conveyor 5, which is used in the initial horizontal excavation stage of the horizontal excavation section of the lowest level. The transverse slag transfer belt conveyor 5 is arranged in the horizontal excavation section of the lowest level, and the length direction of the transverse slag transfer belt conveyor 5 is perpendicular to the length direction of the feeding belt conveyor 1 of the lowest level.

[0046] The main conveyor belt 4 is a slag conveying mechanism arranged on the excavation equipment, and the head end of the transverse conveyor belt 5 ( Figure 2 The upper and middle end of the belt conveyor 4 receives the slag from the main machine, and the tail end of the horizontal belt conveyor 5 ( Figure 2 The middle and lower end) is used to cooperate with the lowest level feeding belt conveyor 1 for feeding. During the excavation process, the transverse slag transfer belt conveyor 5 moves synchronously with the main belt conveyor 4. The main belt conveyor 4 directly discharges the slag to the transverse slag transfer belt conveyor 5. The movement direction of the slag is different between the main belt conveyor 4 and the transverse slag transfer belt conveyor 5 (the movement direction is roughly vertical); the transverse slag transfer belt conveyor 5 then discharges the slag to the feeding belt conveyor 1. The transverse slag transfer belt conveyor 5 serves as an intermediate transfer transition structure. The feeding belt conveyor 1 and the feeding direction are opposite to the feeding direction of the main belt conveyor 4 at this stage. The slag is discharged from the tail end of the feeding belt conveyor 1 to the slag transport truck, Figure 2 The feeding belt conveyor 1 provided in the middle includes two sections, and the two sections are arranged end to end. The transverse slag transfer belt conveyor 5 is a temporary structure. When the initial horizontal excavation section of the lower flat tunnel is excavated to a certain stage, the transverse slag transfer belt conveyor 5 can be removed for the subsequent slag discharge process.

[0047] It also includes a detachable rear supporting belt conveyor 6, which is arranged in the horizontal excavation section of the lowest level, and the length direction of the rear supporting belt conveyor 6 is parallel to the length direction of the feeding belt conveyor 1 of the lowest level, and the height of the rear supporting belt conveyor 6 is higher than the height of the feeding belt conveyor 1;

[0048] Combination Figure 1 , Figure 3 The head end of the rear supporting belt conveyor 6 receives the slag conveyed by the main belt conveyor 4, and the tail end is used to cooperate with the horizontal slag conveyor 5 to transport materials. Figure 3 As shown, the excavation process enters the turning stage from the initial horizontal excavation section of the lower flat tunnel to the lower inclined shaft excavation section, and the rear supporting belt conveyor 6 is installed. The slag discharge process at this stage consists of the main machine belt conveyor 4, the rear supporting belt conveyor 6, the transverse slag transfer belt conveyor 5, the feeding belt conveyor 1, and the slag transport vehicle. The slag is transferred from the main machine belt conveyor 4 to the rear supporting belt conveyor 6, and is transported to the feeding belt conveyor 1 by the drop bucket at the tail end of the rear supporting belt conveyor 6, and then transported to the slag transport vehicle.

[0049] The convex arc fixed belt conveyor 2, the main machine belt conveyor 4, the transverse slag transfer belt conveyor 5, and the rear supporting belt conveyor 6 are all corrugated sidewall belt conveyors. The advantage of the corrugated sidewall belt conveyor is that the slag will not slide when the belt conveyor is at a non-horizontal angle, which can meet the safety transportation of slag during large slope excavation, and the main machine belt conveyor 4 is equipped with a brake to prevent safety hazards such as runaway during excavation.

[0050] Combination Figure 5 The inclined chute 3 includes a U-shaped channel steel 3.1, which is surrounded by three sides, including two side surfaces and a bottom surface; angle steels 3.2 are arranged at the edges of the channel steel 3.1. Figure 5 The angle steel is located at the upper edge of the two sides for connection and installation; the two ends of the channel steel 3.1 are respectively provided with connecting plates 3.3, which are located at both ends of the length direction of the channel steel 3.1 and can provide connection points for two adjacent sections of the inclined chute 3. The connecting plates 3.3 are also U-shaped and fixed to the outer surface of the channel steel 3.1.

[0051] The present invention also provides a slag discharging method, comprising the following steps:

[0052] S1. A feeding belt conveyor 1 and a transverse slag transfer belt conveyor 5 are set up in the horizontal excavation section of the lowest level. The excavator conveys the soil to the transverse slag transfer belt conveyor 5 through the main machine belt conveyor 4, and then transports the soil to the slag transport vehicle through the feeding belt conveyor 1.

[0053] In this stage, the horizontal excavation section A of the lower adit is excavated. Figure 2As shown, the slag discharge process at this stage consists of a main conveyor belt 4, a transverse slag transfer conveyor belt 5, a feeding conveyor belt 1, and a slag transport vehicle X. The main conveyor belt 4 is a corrugated sidewall conveyor, and the slag is transferred to the transverse slag transfer conveyor belt 5 through the main conveyor belt 4, and then transported to the slag transport vehicle through the feeding conveyor belt 1. During the excavation process, the main conveyor belt 4 and the transverse slag transfer conveyor belt 5 at its rear move forward synchronously.

[0054] S2, in the transition stage of digging the inclined shaft excavation section, a rear supporting belt conveyor 6 is set in the horizontal excavation section. The head end of the rear supporting belt conveyor 6 receives the slag transported by the main belt conveyor 4, and the tail end transports the slag to the horizontal slag transfer belt conveyor 5.

[0055] like Figure 3 As shown, the excavation process enters the turning stage from the initial horizontal excavation section A of the lower flat tunnel to the lower inclined shaft excavation section B, and the rear supporting belt conveyor 6 is installed. The slag discharge mechanism at this stage includes the main machine belt conveyor 4, the rear supporting belt conveyor 6, the transverse slag transfer belt conveyor 5, the feeding belt conveyor 1, and the slag transport vehicle X. Among them, the main machine belt conveyor 4 is a corrugated sidewall belt conveyor, and the rear supporting belt conveyor 6 is a corrugated sidewall belt conveyor. The slag is transferred from the main machine belt conveyor 4 to the rear supporting belt conveyor 6, and is transported to the feeding belt conveyor 1 by the drop bucket at the tail end of the rear supporting belt conveyor 6, and then transported to the slag transport vehicle through the slag discharge belt conveyor.

[0056] The main conveyor belt 4 is a corrugated sidewall conveyor, and the rear supporting conveyor belt 6 is a corrugated sidewall conveyor. The advantage is that the slag will not slide when the conveyor belt is at a non-horizontal angle, which can meet the safety transportation of slag during large slope excavation. The main conveyor belt 4 is equipped with a brake to prevent safety hazards such as runaway during excavation. This arrangement can ensure efficient transportation of slag in a limited slag discharge space and ensure excavation efficiency. The horizontal slag transfer conveyor 5 is a horizontal belt conveyor to achieve the change of direction of the slag.

[0057] S3. When digging the inclined shaft excavation section, an inclined chute 3 is set in the inclined shaft excavation section. When the dropping point of the main conveyor belt 4 passes the receiving point of the slag transport vehicle, the main conveyor belt 4 discharges the slag into the inclined chute 3, and the inclined chute 3 transports the slag to the upper conveyor belt 1.

[0058] like Figure 4 As shown, the excavation process has completely entered the lower inclined shaft excavation stage B. The slag discharge mechanism in this stage includes the chute 3, the feeding belt conveyor 1, and the slag transport vehicle X. The slag generated during the excavation process is directly transferred from the chute 3 to the feeding belt conveyor 1, and finally to the slag transport vehicle X to complete the transportation of the slag.

[0059] The excavation process enters the transition stage from the lower inclined shaft excavation section B to the middle flat tunnel horizontal excavation section C. The slag discharge mechanism at this stage includes the main conveyor belt 4, the convex arc fixed conveyor belt 2, the chute 3, the feeding conveyor belt 1 and the slag transport vehicle X. Among them, the main conveyor belt 4 and the convex arc fixed conveyor belt 2 are corrugated sidewall conveyors. This arrangement can ensure that the slag will not slide during the inclined shaft stage and can meet the safe transportation of slag during large slope excavation. The slag generated during the excavation process is transported by the main conveyor belt 1 to the convex arc fixed conveyor belt 2, and the length of the convex arc fixed conveyor belt 2 can be extended with the excavation process. The tail end of the convex arc fixed conveyor belt 2 is connected to the head end of the chute 3, and the slag falls through the chute 3 to the feeding conveyor belt 1 and is transported to the slag transport vehicle X.

[0060] S4. When excavating from the inclined shaft excavation section to the top horizontal excavation section, arrange the convex arc fixed belt conveyor 2, and the main machine belt conveyor 4 discharges the debris to the convex arc fixed belt conveyor 2; arrange the feeding belt conveyor 1, and when the dropping point of the main machine belt conveyor 4 passes over the convex arc fixed belt conveyor 2, the main machine belt conveyor 4 discharges the debris to the upper feeding belt conveyor 1.

[0061] The excavation process enters the horizontal excavation section C of the middle flat tunnel. The slag discharge mechanism at this stage includes the main machine belt conveyor 4, the convex arc fixed belt conveyor 2, the chute 3, the feeding belt conveyor 1 and the slag transport vehicle X. The slag generated during the excavation process is transported by the main machine belt conveyor 4 to the convex arc fixed belt conveyor 2, falls through the chute 3 to the feeding belt conveyor 1, and is transported to the slag transport vehicle X.

[0062] The advantage of this slag discharge process is that the chute 3, the feeding belt conveyor 1 and the slag transport vehicle X in the previous stage can be used as one of the components of the next stage, which greatly reduces the installation and disassembly costs and improves the use efficiency of the equipment.

[0063] Figure 1 The process of the upper inclined shaft excavation section D is the same as that of the lower inclined shaft excavation section B, and the process of the upper flat tunnel horizontal excavation section E is the same as that of the middle flat tunnel horizontal excavation section C.

[0064] The present invention avoids the shortcomings of traditional belt conveyor and flatbed truck slag discharge, reduces the accident rate during construction, improves excavation efficiency, and reduces construction costs; the slag can be transported by its own gravity when passing through the chute, without the need for other external forces; and the chute section structure is simple, and adjacent chute sections are connected by bolts, which makes installation and disassembly simple and convenient, and also reduces the probability of accidents; the chute is provided with a middle buffer device and a safety buffer bin 3.4 at the bottom of the tunnel, which can prevent the feeding belt conveyor located at the bottom of the chute from malfunctioning due to impact and reducing excavation efficiency. In the structure of the present invention, the slag discharge structure of the previous excavation stage can be used as a part of the slag discharge structure of the next excavation stage, which minimizes the installation and disassembly costs and improves the utilization rate of the equipment.

[0065] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A super-large slope reverse slope slag discharge system, characterized in that: include: A feeding belt conveyor (1) is arranged in the horizontal excavation section, with the head end being used for receiving materials and the tail end being used for discharging materials; The convex arc fixed belt conveyor (2) is arranged at the tail end of the horizontal excavation section, and the head end receives the slag transported by the upper feeding belt conveyor (1) or the main belt conveyor (4) arranged on the excavator; the length of the convex arc fixed belt conveyor (2) can be extended; An inclined chute (3) is arranged in the inclined shaft excavation section, the top end of which is used to receive the slag transported by the convex arc fixed belt conveyor (2), and the bottom end of which is used to output the slag to the lower feeding belt conveyor (1); The inclined chute (3) is provided with a middle buffer device and a safety buffer bin (3.4) at the bottom of the cave; The middle buffer device comprises a flexible high-strength chain, a spring buffer block, and a rotating baffle to prevent the slag from impacting and damaging the inclined chute (3); The safety buffer bin (3.4) at the bottom of the tunnel is anchored to the tunnel wall, the bottom is filled with loose gravel, and sound insulation cotton and rubber are arranged on the outside to reduce noise and cushion vibration, so as to prevent the slag from impacting and damaging the belt conveyor below; the safety buffer bin (3.4) at the bottom of the tunnel adopts side slag discharge, and the slag discharge port is equipped with a pneumatic gate; It also includes a detachable transverse slag transfer belt conveyor (5), the transverse slag transfer belt conveyor (5) being arranged in the horizontal excavation section of the lowest layer, and the length direction of the transverse slag transfer belt conveyor (5) being perpendicular to the length direction of the feeding belt conveyor (1) of the lowest layer; The head end of the transverse slag conveyor (5) receives the slag conveyed by the main conveyor (4), and the tail end is used to cooperate with the feeding conveyor (1) at the lowest level to connect and convey materials; The transverse slag transfer belt conveyor (5) moves synchronously with the main machine belt conveyor (4); It also includes a detachable rear supporting belt conveyor (6), the rear supporting belt conveyor (6) being arranged at the horizontal excavation section of the lowest level, the length direction of the rear supporting belt conveyor (6) being parallel to the length direction of the feeding belt conveyor (1) at the lowest level, and the height of the rear supporting belt conveyor (6) being higher than the height of the feeding belt conveyor (1); The head end of the rear supporting belt conveyor (6) receives the slag conveyed by the main belt conveyor (4), and the tail end is used to cooperate with the transverse slag transfer belt conveyor (5) to transport materials.

2. The super-large slope reverse slope slag discharge system according to claim 1, characterized in that: A quick-release cover plate is provided on the top of the inclined chute (3), and each inclined chute (3) is provided with a visual window.

3. The super-large slope reverse slope slag discharge system according to claim 1, characterized in that: The convex arc fixed belt conveyor (2), the main machine belt conveyor (4), the transverse slag transfer belt conveyor (5), and the rear matching belt conveyor (6) are all corrugated sidewall belt conveyors.

4. The super-large slope reverse slope slag discharge system according to claim 1, characterized in that: The inclined chute (3) comprises a U-shaped channel steel (3.1), angle steel (3.2) is arranged at the edge of the channel steel (3.1), and connecting plates (3.3) are respectively arranged at both ends of the channel steel (3.1).

5. A slag discharge method, characterized in that: The super-large slope reverse slope slag discharge system applied to any one of claims 1 to 4 comprises: S1. A feeding belt conveyor (1) and a transverse slag transfer belt conveyor (5) are arranged at the lowest level of the horizontal excavation section. The excavator conveys the slag to the transverse slag transfer belt conveyor (5) through the main machine belt conveyor (4), and then conveys the slag to the slag transport vehicle through the feeding belt conveyor (1); S2, in the transition stage of digging the inclined shaft excavation section, a rear supporting belt conveyor (6) is arranged in the horizontal excavation section, the head end of the rear supporting belt conveyor (6) receives the slag conveyed by the main belt conveyor (4), and the tail end conveys the slag to the horizontal slag transfer belt conveyor (5); S3, when digging the inclined shaft excavation section, an inclined chute (3) is arranged in the inclined shaft excavation section, and when the material dropping point of the main machine belt conveyor (4) passes over the material receiving point of the slag transport vehicle, the main machine belt conveyor (4) discharges the slag into the inclined chute (3), and the inclined chute (3) transports the slag to the feeding belt conveyor (1); S4. When excavating from the inclined shaft excavation section to the top horizontal excavation section, a convex arc fixed belt conveyor (2) is arranged, and the main machine belt conveyor (4) discharges debris to the convex arc fixed belt conveyor (2); a loading belt conveyor (1) is arranged, and when the drop point of the main machine belt conveyor (4) passes over the convex arc fixed belt conveyor (2), the main machine belt conveyor (4) discharges debris to the loading belt conveyor (1).

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