A rapid tunneling method based on a flexible continuous transportation system

Abstract

The present invention relates to a rapid tunneling method based on a flexible continuous transportation system. The flexible conveying of the flexible continuous transportation system is used to realize the material transportation during the initial tunneling process of the roadway to be tunneled. The discharge end of the flexible continuous transportation system straddles the conveyor belt, realizing the lap joint. During the lap joint state, the materials conveyed by the flexible continuous transportation system are thrown onto the conveyor belt. Before the flexible continuous transportation system enters the roadway to be tunneled as a whole, a wheeled flexible conveyor is used as a transition. When the flexible continuous transportation system completely enters the roadway to be tunneled from the transportation roadway, at the same time, by using the transition function of the wheeled flexible conveyor, space is reserved for the installation of the telescopic conveyor belt. During the entire tunneling process, it is only necessary to stop the machine briefly when installing the telescopic conveyor belt and stretching the telescopic conveyor belt, greatly reducing the time occupied by equipment installation. While ensuring the reliable transportation of materials, the tunneling efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mining, and particularly to a rapid tunneling method based on a flexible continuous transportation system. Background Art

[0002] With the continuous development of coal mining technology, more and more equipment is applied in the process of coal mining construction. Among them, the transportation of the excavated materials is mainly realized by using chutes, telescopic belt conveyors and transportation belt conveyors. Since these three types of equipment cannot achieve turning transportation, when driving along the working face gateway, it is necessary to first install a chute and use the chute and the transportation belt conveyor in the transportation roadway to relay to realize the outward transportation of materials. Since the length of the chute is not adjustable, after driving for a certain distance, it is necessary to withdraw the chute and then install a telescopic belt conveyor; when driving the cut-through roadway, it is also necessary to install and withdraw the chute, so that during the operation of each working shift, the time for installing and disassembling equipment takes up more time, resulting in less effective tunneling time, which is not conducive to improving the tunneling efficiency. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a rapid tunneling method based on a flexible continuous transportation system, which uses a flexible transportation device that can turn to cooperate with a telescopic belt conveyor for transportation, reduces the time occupied by equipment installation, and greatly improves the tunneling efficiency.

[0004] The present invention is realized by the following technical solutions. A rapid tunneling method based on a flexible continuous transportation system is provided, including the following aspects:

[0005] 1. The flexible continuous transportation system transports while walking. The flexible continuous transportation system includes a frame equipped with a walking device and a belt conveyor installed on the frame. There is a first straddle space below the belt conveyor inside the frame. The frame includes several unit frames, and adjacent unit frames are hinged by vertical pin shafts;

[0006] 2. A transportation belt conveyor is arranged in the transportation roadway, and the feeding end of the transportation belt conveyor extends into the first straddle space. The flexible continuous transportation system forms an overlap with the transportation belt conveyor. The discharging end of the belt conveyor is located above the transportation belt conveyor. The flexible continuous transportation system follows the tunneling machine to move, and the feeding end of the belt conveyor is adapted to the discharging end of the tunneling machine. When the tunneling machine turns and enters the roadway to be driven for tunneling, the excavated materials are conveyed by the belt conveyor in a turning state to the transportation belt conveyor;

[0007] 3. During the driving of the working face gate roadway, a wheeled flexible conveyor is installed in the transport roadway, straddling the transport belt conveyor. The wheeled flexible conveyor is adapted to the first straddling space, and a second straddling space adapted to the transport belt conveyor is provided inside the wheeled flexible conveyor. The wheeled flexible conveyor includes a support with a traveling mechanism installed thereon and a belt conveyor installed on the support. The second straddling space is located below the belt conveyor. The support includes a number of frame units, and adjacent frame units are hinged by vertical pin shafts.

[0008] 4. During the driving of the working face gate roadway, before the flexible continuous transport system is disengaged from the transport belt conveyor, the wheeled flexible conveyor moves by itself until the discharge end of the belt conveyor is located above the transport belt conveyor and the feed end of the belt conveyor is located within the first straddling space. The flexible continuous transport system forms a lap joint with the wheeled flexible conveyor. The length of the wheeled flexible conveyor is greater than the minimum installation length of the telescopic belt conveyor. When the roadheader continues to drive, the flexible continuous transport system moves with the roadheader, and the wheeled flexible conveyor remains in place. The materials excavated by the roadheader are successively conveyed to the transport belt conveyor through the belt conveyor and the belt conveyor.

[0009] 5. When the distance between the discharge end of the flexible continuous transport system and the transport belt conveyor is greater than or equal to the minimum installation length of the telescopic belt conveyor, the wheeled flexible conveyor moves out of the first straddling space by itself and moves along the transport belt conveyor into the transport roadway. Then, the telescopic belt conveyor is installed so that the discharge end of the head of the telescopic belt conveyor is located above the transport belt conveyor and the tail of the telescopic belt conveyor is located within the first straddling space. The flexible continuous transport system forms a lap joint with the telescopic belt conveyor. During the continuous driving of the roadheader, the excavated materials are successively conveyed to the transport belt conveyor through the belt conveyor and the telescopic belt conveyor. Every time a certain distance is driven, the tail of the telescopic belt conveyor moves a corresponding distance in the driving direction to keep the flexible continuous transport system in a lap joint state with the telescopic belt conveyor until the driving of the gate roadway is completed.

[0010] In this solution, the bendable conveying of the flexible continuous transportation system is utilized to achieve the material transportation during the initial tunneling process of the roadway to be excavated. The discharging end of the flexible continuous transportation system straddles the conveyor belt, realizing the lap joint. During the lap joint state, the materials conveyed by the flexible continuous transportation system are dropped onto the conveyor belt, ensuring continuous transportation. Before the flexible continuous transportation system entirely enters the roadway to be excavated, a wheeled flexible conveyor is used as a transition. When the flexible continuous transportation system completely enters the roadway to be excavated from the transportation roadway, the continuous transportation of materials is also ensured. At the same time, by using the transition function of the wheeled flexible conveyor, space is reserved for the installation of the telescopic conveyor belt. During this process, there is no need to stop the machine, and both the flexible continuous transportation system and the wheeled flexible conveyor can move by themselves. After installing the telescopic conveyor belt, by utilizing the extendable characteristics of the telescopic conveyor belt, the flexible continuous transportation system is always kept in a lap joint state with the telescopic conveyor belt. During the entire tunneling process, it only needs to briefly stop the machine when installing the telescopic conveyor belt and stretching the telescopic conveyor belt, greatly reducing the time occupied by equipment installation. While ensuring the reliable transportation of materials, the tunneling efficiency is significantly improved.

[0011] As an optimization, during the crossheading tunneling process, the feeding end of the flexible continuous transportation system follows the roadheader into the crossheading, and the discharging end of the flexible continuous transportation system is always in a lap joint state with the telescopic conveyor belt. The excavated materials are conveyed to the telescopic conveyor belt through the belt conveyor of the flexible continuous transportation system. The setting of this optimized solution eliminates the time occupied by the installation and withdrawal of the scraper conveyor during crossheading tunneling, and greatly shortens the time used for equipment preparation before crossheading tunneling.

[0012] As an optimization, the traveling device of the flexible continuous transportation system includes two groups of traveling systems arranged in the left-right direction. One side of the traveling system is a crawler traveling system, and the other side of the traveling system includes a number of detachable universal support wheels that are sequentially spaced along the length direction. The traveling system of this optimized solution adopts an asymmetric structure. By setting the crawler traveling system, the turning and tracking functions of the flexible continuous transportation system are ensured, making it more convenient to turn in the roadway. By setting the detachable universal support wheels, on the one hand, it plays a supporting role to ensure the stability of the equipment, and on the other hand, through the detachable setting, the difficulty of straddle installation is reduced, making it more convenient to install corresponding equipment in the straddle space, further shortening the time occupied by equipment installation.

[0013] The beneficial effects of the present invention are as follows: It eliminates the time occupied by the installation and withdrawal of the scraper conveyor when installing the telescopic conveyor belt in the crossheading of the working face, and ensures the tunneling continuity before installing the telescopic conveyor belt, significantly improving the tunneling efficiency; both the flexible continuous transportation system and the wheeled flexible conveyor can move by themselves. After the tunneling is completed, they can directly move to the next working location by themselves, shortening the time occupied by transferring equipment; the adopted straddle installation method ensures the continuity of material transportation within the lap joint state, greatly reducing the moving frequency of the feeding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the equipment used in the initial stage of the roadway to be excavated;

[0015] Figure 2 It is a schematic diagram of the equipment used before installing the telescopic belt conveyor;

[0016] Figure 3 It is a schematic diagram of the equipment used after installing the telescopic belt conveyor;

[0017] Figure 4 It is a schematic diagram of the equipment used during the excavation of the cutting roadway;

[0018] Figure 5 It is a schematic diagram of the straddle installation of the flexible continuous transportation system and the telescopic belt conveyor;

[0019] Figure 6 It is a schematic diagram of the turning state of the flexible continuous transportation system. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to clearly illustrate the technical features of the present solution, the present solution will be described below through specific embodiments.

[0021] In order to solve the problem of low tunneling efficiency caused by frequent movement operations of the conveying equipment during coal mine tunneling, the present embodiment provides a rapid tunneling method based on a flexible continuous transportation system. The equipment used in this tunneling method includes a transportation belt conveyor, a telescopic belt conveyor, a flexible continuous transportation system, and a wheeled flexible transporter. The flexibility in this embodiment means that it can achieve turning in the roadway. The transportation belt conveyor and the telescopic belt conveyor in the used equipment completely adopt the equipment in the prior art; both the flexible continuous transportation system and the wheeled flexible transporter are improvements on the existing mobile conveying equipment. Both the wheeled flexible transporter and the flexible continuous transportation system can turn and move by themselves, and both are provided with a conveying belt, which can not only complete the material conveying during the overall movement process, but also only achieve the material conveying when the whole remains in place. Among them, the flexible continuous transportation system also has a tracing function, that is, the moving trajectories of all parts of the flexible continuous transportation system are the same.

[0022] Specifically, the wheeled flexible transporter includes a bracket installed with a traveling mechanism and a belt conveyor installed on the bracket. A second straddle space adapted to the transportation belt conveyor is provided below the belt conveyor. The bracket includes a plurality of frame units, and adjacent frame units are hinged by vertical pin shafts, and the turning of the wheeled flexible transporter is realized by the relative rotation between adjacent frame units.

[0023] The flexible continuous transportation system includes a frame equipped with traveling devices and a belt conveyor installed on the frame. There is a first straddling space located below the belt conveyor inside the frame. The first straddling space is adapted to the wheeled flexible transporter. Through the setting of the first straddling space, the flexible continuous transportation system can straddle on the wheeled flexible transporter, telescopic belt conveyor, and transportation belt conveyor respectively to achieve straddling lap joint, so as to ensure the accuracy of feeding and the continuity of transportation. The frame includes several unit frames, and adjacent unit frames are hinged by vertical pin shafts to realize the turning of the flexible continuous transportation system. The traveling devices of the flexible continuous transportation system include two groups of traveling systems arranged in the left-right direction. The traveling system on the left is a crawler traveling system, and the traveling system on the right includes several detachable universal support wheels arranged at intervals along the length direction. The first straddling space is located between the crawler traveling system and the universal support wheels, and the universal support wheels and the crawler traveling system form a gantry form. As Figure 5 shown, the universal support wheels are installed on the vertically arranged support rods, and the support rods are fixedly connected to the frame through bolts, and the support rods support the frame of the belt conveyor. Each universal support wheel and the support rod are arranged at intervals along the length direction. Since the weight of the crawler traveling system is relatively large, the flexible continuous transportation system will not tip over after all the universal support wheels and support rods are removed. Of course, when installing the telescopic belt conveyor into the first straddling space, a part of the universal support wheels and support rods can also be removed to ensure the stability of the flexible continuous transportation system. The frame and the crawler traveling system of the flexible continuous transportation system adopt the existing technology, such as the structure disclosed in the patent application No. 201910120092X. Of course, other traveling devices with a tracking function can also be used as long as the moving trajectories of each part are consistent.

[0024] This embodiment provides a rapid tunneling method based on a flexible continuous transportation system, which specifically includes the following steps:

[0025] 1. Set a transportation belt conveyor in the transportation roadway, and the feeding end of the transportation belt conveyor extends into the first straddling space. The flexible continuous transportation system forms a lap joint with the transportation belt conveyor. The discharging end of the belt conveyor is located above the transportation belt conveyor. The flexible continuous transportation system moves along with the tunneling machine, and the feeding end of the belt conveyor is adapted to the discharging end of the tunneling machine. The flexible continuous transportation system conveys materials while walking. When the tunneling machine turns and enters the roadway to be tunneled, the excavated materials are conveyed by the belt conveyor in the turning state to the transportation belt conveyor;

[0026] 2. When tunneling in the working face gateway, set a wheeled flexible transporter straddling on the transportation belt conveyor in the transportation roadway. The wheeled flexible transporter is adapted to the first straddling space, and a second straddling space adapted to the transportation belt conveyor is arranged inside the wheeled flexible transporter;

[0027] 3. During the driving of the working face gateway, before the flexible continuous transportation system is disconnected from the conveyor belt, the wheeled flexible conveyor moves by itself until the discharge end of the belt conveyor is above the conveyor belt and the feeding end of the belt conveyor is within the first straddle space. The flexible continuous transportation system forms a lap joint with the wheeled flexible conveyor. The length of the wheeled flexible conveyor is greater than the minimum installation length of the telescopic belt conveyor. In this embodiment, the length of the wheeled flexible conveyor is 40 meters. When the roadheader continues to drive, the flexible continuous transportation system moves with the roadheader, and the wheeled flexible conveyor remains in place. The materials excavated by the roadheader are successively transported to the conveyor belt through the belt conveyor and the belt conveyor;

[0028] 4. When the distance between the discharge end of the flexible continuous transportation system and the conveyor belt is greater than or equal to the minimum installation length of the telescopic belt conveyor, sufficient space is provided for installing the telescopic belt conveyor. The wheeled flexible conveyor moves out of the first straddle space by itself and moves along the conveyor belt into the transportation roadway; then the telescopic belt conveyor is installed so that the discharge end of the head of the telescopic belt conveyor is above the conveyor belt and the tail of the telescopic belt conveyor is within the first straddle space. The flexible continuous transportation system forms a lap joint with the telescopic belt conveyor. In this embodiment, the tail of the telescopic belt is installed at one end of the flexible continuous transportation system close to the roadheader to reduce the number of times of stretching the belt; during the continuous driving of the roadheader, the excavated materials are successively transported to the conveyor belt through the belt conveyor and the telescopic belt conveyor. Every time the discharge end of the belt conveyor of the flexible continuous transportation system reaches directly above the feeding end of the telescopic belt conveyor, the tail of the telescopic belt conveyor moves forward by a distance corresponding to the total length of the belt conveyor of the flexible continuous transportation system along the driving direction to keep the flexible continuous transportation system in a lap joint state with the telescopic belt conveyor and achieve the purpose of reducing the number of times of pulling the belt until the driving of the gateway roadway is completed;

[0029] 5. During the driving of the cut-through roadway, the feeding end of the flexible continuous transportation system follows the roadheader into the cut-through roadway, and the discharge end of the flexible continuous transportation system is always in a lap joint state with the telescopic belt conveyor. The excavated materials are transported to the telescopic belt conveyor through the belt conveyor of the flexible continuous transportation system.

[0030] The mining method of this embodiment has the following positive effects in actual use:

[0031] 1. The installation and withdrawal operations of the scraper conveyor when installing the telescopic belt conveyor in the working face gateway driving are omitted. Before installing the telescopic belt conveyor, the straddle lap joint method is used to ensure the continuous transportation of materials without stopping the machine, which greatly reduces the shutdown frequency;

[0032] 2. The installation and withdrawal operations of the scraper conveyor during the driving of the cut-through roadway are omitted;

[0033] 3. After the equipment is used up, it does not need to be dismantled and can be directly moved to the next working location;

[0034] 4. The belt conveyor in the gateway does not need to frequently pull the tail of the machine and add belts, greatly accelerating the tunneling speed;

[0035] 5. It can be equipped with modules such as crushing, transferring, and supporting, and can perform serpentine transportation and run with variable slopes up and down;

[0036] 6. It requires fewer personnel, the production management is relatively simple, and it is convenient to achieve remote control;

[0037] 7. It greatly reduces the cost per ton of coal and reduces the accident rate of mechanical equipment and the safety risks in the mine.

[0038] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be realized by or adopted from the prior art, and will not be elaborated here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. The present invention has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions, or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention do not depart from the purpose of the present invention and should also fall within the scope of the protection of the claims of the present invention.

Claims

1. A rapid tunneling method based on a flexible continuous transportation system, characterized in that: The flexible continuous transportation system includes a frame equipped with traveling devices and a belt conveyor installed on the frame. A first straddling space is provided inside the frame and is located below the belt conveyor. The frame includes several unit frames, and adjacent unit frames are hinged by vertical pin shafts. The traveling devices of the flexible continuous transportation system include two sets of traveling systems arranged in the left-right direction. The traveling system on the left is a crawler traveling system, and the traveling system on the right includes several detachable universal support wheels spaced at intervals along the length direction. The first straddling space is located between the crawler traveling system and the universal support wheels, and the universal support wheels and the crawler traveling system form a gantry form. A transportation belt conveyor is installed in the transportation roadway, and the feeding end of the transportation belt conveyor extends into the first straddling space. The flexible continuous transportation system is overlapped with the transportation belt conveyor. The discharging end of the belt conveyor is located above the transportation belt conveyor. The flexible continuous transportation system moves along with the roadheader, and the feeding end of the belt conveyor is adapted to the discharging end of the roadheader. When the roadheader turns and enters the roadway to be excavated for excavation, the excavated materials are conveyed by the belt conveyor in a turning state to the transportation belt conveyor. During the excavation of the working face gateway, a wheeled flexible conveyor is installed in the transportation roadway and straddles the transportation belt conveyor. The wheeled flexible conveyor is adapted to the first straddling space, and a second straddling space adapted to the transportation belt conveyor is provided inside the wheeled flexible conveyor. The wheeled flexible conveyor includes a bracket equipped with traveling mechanisms and a belt conveyor installed on the bracket. The second straddling space is located below the belt conveyor. The bracket includes several frame units, and adjacent frame units are hinged by vertical pin shafts. During the excavation of the working face gateway, before the flexible continuous transportation system is disengaged from the overlap with the transportation belt conveyor, the wheeled flexible conveyor moves by itself until the discharging end of the belt conveyor is located above the transportation belt conveyor and the feeding end of the belt conveyor is located in the first straddling space. The flexible continuous transportation system forms an overlap with the wheeled flexible conveyor. The length of the wheeled flexible conveyor is greater than the minimum installation length of the telescopic belt conveyor. When the roadheader continues to excavate, the flexible continuous transportation system moves along with the roadheader, and the wheeled flexible conveyor remains in place. The materials excavated by the roadheader are successively conveyed by the belt conveyor and the belt conveyor to the transportation belt conveyor. When the distance between the discharging end of the flexible continuous transportation system and the transportation belt conveyor is greater than or equal to the minimum installation length of the telescopic belt conveyor, the wheeled flexible conveyor moves out of the first straddling space by itself and moves along the transportation belt conveyor into the transportation roadway. Then, the telescopic belt conveyor is installed so that the discharging end of the head of the telescopic belt conveyor is located above the transportation belt conveyor and the tail of the telescopic belt conveyor is located in the first straddling space. During the continuous excavation of the roadheader, the excavated materials are successively conveyed by the belt conveyor and the telescopic belt conveyor to the transportation belt conveyor. Every time a certain distance is excavated, the tail of the telescopic belt conveyor moves a corresponding distance along the excavation direction by itself so that the flexible continuous transportation system and the telescopic belt conveyor remain in an overlapping state until the excavation of the gateway roadway is completed.

2. The rapid tunneling method based on a flexible continuous transportation system according to claim 1, characterized in that: During the driving process of the cutting roadway, the feeding end of the flexible continuous transportation system follows the roadheader into the cutting roadway. The discharging end of the flexible continuous transportation system is always in a lapping state with the telescopic belt conveyor. The excavated materials are conveyed to the telescopic belt conveyor through the belt conveyor of the flexible continuous transportation system.

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