Support installation and construction technology for straight moving working face without reversing chamber

Abstract

The invention relates to the technical field of coal mining equipment installation, in particular to a support installation construction process for a non-reversing chamber straight moving working face, which comprises the following steps: step 1, a preparation stage, step 2, a process planning stage, step 3, support transportation, step 4, optimized installation, step 5, synchronous construction, and step 6, an ending stage. According to the method, the traditional mode that supports are sequentially installed from the machine head or the machine tail is changed into the mode that the supports are installed on the machine head and the machine tail from the middle of the cutting hole, the problem that the supports are installed lagging due to the fact that vehicles cannot meet is solved, and the supports withdrawn from the withdrawing face can be installed on a new face in time without waiting in line; according to the technology, the support withdrawing and installing speed is effectively improved by more than one time, the construction progress is greatly accelerated, the vehicle idle condition is avoided from the vehicle using efficiency, the vehicle using efficiency is optimized, and the technology can be popularized and applied to construction of an installing face open-off cut and a crossheading back-up-chamber-free straight moving face and has wide applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of the installation of coal mining equipment, and particularly relates to a construction technology for installing supports in a face with direct transfer without a reversing chamber. Background Art

[0002] During the installation and withdrawal (direct transfer) of conventional fully-mechanized mining equipment, the supports are installed from the head end to the tail end or from the tail end to the head end in sequence. A reversing chamber is constructed in the cut-through, and a connecting roadway is constructed in the auxiliary haulage gateway and the belt conveyor gateway. Special vehicles can meet in the cut-through and gateways of the working face, that is: when installing supports in the cut-through, multiple special vehicles can meet in the cut-through or the auxiliary haulage gateway, and there is no need to drive the scraper loader (support vehicle) out of the cut-through (gateway) for vehicle dislocation, and on-site withdrawal can be realized.

[0003] Currently, neither the Shaliang Coal Mine nor the Anshan Coal Mine located in Shaanxi Province, China, has constructed a reversing chamber, and no reversing chamber has been constructed in the gateways at the head end and the tail end. At the same time, no auxiliary haulage gateway is designed in the head-end gateway. If the conventional support installation method is adopted, after the support is transported into the cut-through when installing supports in the cut-through, the support vehicle needs to be driven out along the belt conveyor (return air) gateway, and then the scraper loader is driven into the cut-through for support installation. In this way, vehicle meeting in the cut-through or gateway cannot be realized, and finally the supports withdrawn from the withdrawal face cannot be installed in the new face in time, which will ultimately affect the construction progress.

[0004] Therefore, in view of the problem that the installation lag of supports caused by the inability to meet vehicles due to sequential installation in the construction working conditions of the cut-through and gateways of the installation face without a reversing chamber for direct transfer, a construction technology for installing supports in a face with direct transfer without a reversing chamber can be designed. Summary of the Invention

[0005] In order to overcome the problem that the installation lag of supports caused by the inability to meet vehicles due to sequential installation in the construction working conditions of the cut-through and gateways of the installation face without a reversing chamber for direct transfer.

[0006] The technical solution of the present invention is as follows: a construction technology for installing supports in a face with direct transfer without a reversing chamber, and the steps are as follows: Step 1: Preparation stage. According to the geological conditions of the mine and the roadway layout, determine the specific situation of the direct transfer face, including the structure of the cut-through and gateways, and the limiting conditions of no reversing chamber, and prepare the required hydraulic supports, scraper loaders (support vehicles) and special vehicles; Step 2: Process planning stage. Set a reference installation point in the middle of the cut-through to divide the working areas at the head end and the tail end, and establish a two-way transportation route; Step 3: Support transportation. Transport the hydraulic supports withdrawn from the withdrawal face to the middle position of the cut-through of the new face through the support vehicle; Step 4: Optimize the installation. Start installing the first set of hydraulic supports at the middle position of the cutting eye, serving as the reference point for the two-way installation of the head and tail in the follow-up, thus avoiding the problem of lagging support installation caused by the inability to pass each other due to sequential installation. Step 5: Synchronize the construction. After the installation of the first set of hydraulic supports is completed, then install the remaining hydraulic supports sequentially from the middle position towards the head and tail directions simultaneously, improving the construction efficiency. Step 6: Finalization stage. After the installation of all hydraulic supports is completed, conduct functional debugging and safety inspections of the equipment to ensure the installation quality. Preferably, in Step 1, the direct moving working face includes a working face belt conveyor gateway, a working face cutting eye, a working face auxiliary return airway, a transportation connection roadway, and an auxiliary return connection roadway.

[0007] Preferably, the method for determining the reference installation point in Step 2 is: According to the total length of the cutting eye, select the central area within the 5% range in the middle as the reference installation point.

[0008] Preferably, the transportation route of the hydraulic supports in Step 3 is: Directly reach the middle of the cutting eye through the working face belt conveyor gateway, forming a "head - middle - tail" triangular circulation transportation path.

[0009] Preferably, in Step 3, the support vehicle is equipped with a two-way communication system and a laser positioning system to receive the installation progress instructions in real time to adjust the transportation progress.

[0010] Preferably, the two-way communication system is used to receive the installation progress data and send dynamic adjustment transportation instructions, and adopts a wireless communication module certified for mine explosion protection, supporting at least one signal transmission method of the LoRa long-distance low-power communication protocol or the 5G private network ultra-low-latency communication protocol.

[0011] Preferably, the laser positioning module is used to calibrate the support spacing to ensure that the spacing error is controlled within ±5 cm.

[0012] Preferably, the implementation method of synchronous installation in Step 4 is: Configure at least two independently operated hydraulic support installation devices, which are respectively responsible for the installation operations in the head direction and the tail direction.

[0013] Preferably, in Step 5, the installation group in the head direction advances from the reference installation point towards the head, and sends a progress signal to the dispatching center after installing each support. The installation group in the tail direction synchronously advances from the reference installation point towards the tail, and the installation speed is consistent with that in the head direction.

[0014] The beneficial effects of the present invention: The support installation construction technology for the direct transfer working face without a reversing chamber, from the perspective of construction efficiency, by changing the traditional way of installing supports sequentially from the head or the tail of the shearer, to installing from the middle of the cut-through to the head and the tail respectively, avoids the problem of lag in support installation caused by the inability to pass each other, enables the supports withdrawn from the retreating face to be installed in the new face in a timely manner without queuing, and effectively doubles the speed of support withdrawal and installation, greatly accelerating the construction progress. In terms of vehicle usage efficiency, it avoids vehicle idle situations and optimizes vehicle usage efficiency. In terms of cost and resource utilization, there is no need to store the withdrawn supports in the old face, saving storage space and management costs. In addition, this technology can avoid replacing the transition supports at the head or the tail of the shearer, reducing unnecessary construction links and resource waste. Compared with the traditional construction method, this technology can be popularized and applied in the construction of the cut-through of the installation face and the direct transfer face without a reversing chamber in the crossheading, with wide applicability, bringing considerable economic benefits and improved construction efficiency, providing a new solution for the coal mining industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic diagram of the installation and transportation of the hydraulic support for the direct transfer working face of the present invention.

[0016] Description of the reference numerals: 1, belt conveyor gateway of the working face; 2, cut-through of the working face; 3, auxiliary return gateway of the working face; 4, transportation connection roadway; 5, auxiliary return connection roadway. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will be further described below in conjunction with the drawings and embodiments.

[0018] Please refer to Figure 1 , the present invention provides an embodiment: A support installation construction technology for a direct transfer working face without a reversing chamber, the steps are as follows: Step 1: Preparation stage, according to the mine geological conditions and roadway layout, determine the specific situation of the direct transfer working face, including the structure of the cut-through and the crossheading, as well as the limiting conditions of the non-reversing chamber, and prepare the required hydraulic supports, scraper conveyors (support vehicles) and special vehicles; Step 2: Process planning stage, set a reference installation point in the middle of the cut-through to divide the working area of the head and the working area of the tail, and establish a two-way transportation route; Step 3: Support transportation, transport the hydraulic supports withdrawn from the retreating face to the middle position of the cut-through of the new face through the support vehicle; Step 4: Optimized installation, start installing the first group of hydraulic supports at the middle position of the cut-through as the reference point for the subsequent two-way installation of the head and the tail, avoiding the problem of lag in support installation caused by the inability to pass each other due to sequential installation; Step 5: Synchronous construction. After the installation of the first group of hydraulic supports is completed, the remaining hydraulic supports are sequentially installed from the middle position towards the head and the tail of the face simultaneously, which improves the construction efficiency. Step 6: In the final stage, after the installation of all hydraulic supports is completed, functional debugging and safety inspection of the equipment are carried out to ensure the installation quality. In Step 1, the direct transfer face includes the face belt conveyor gateway 1, the face cut 2, the face auxiliary return gateway 3, the transportation connection roadway 4, and the auxiliary return connection roadway 5.

[0019] The method for determining the reference installation point in Step 2 is: According to the total length of the cut, select the central area within the middle 5% range as the reference installation point.

[0020] The transportation route of the hydraulic supports in Step 3 is: Directly reach the middle of the cut 2 through the face belt conveyor gateway 1, forming a "head - middle - tail" triangular circulation transportation path.

[0021] In Step 3, the support vehicle is equipped with a two-way communication system and a laser positioning system, which receives the installation progress instructions in real time to adjust the transportation progress. The two-way communication system is used to receive the installation progress data and send dynamic adjustment transportation instructions, and adopts a wireless communication module certified for mine explosion protection, supporting at least one signal transmission method of the LoRa long-distance low-power communication protocol or the 5G private network ultra-low latency communication protocol. The laser positioning module is used to calibrate the support spacing to ensure that the spacing error is controlled within ±5 cm.

[0022] The implementation method of synchronous installation in Step 4 is: Configure at least two independently operated hydraulic support installation devices, which are respectively responsible for the installation operations in the head direction and the tail direction.

[0023] In Step 5, the installation group in the head direction advances from the reference installation point towards the head. After installing each support, it sends a progress signal to the dispatching center. The installation group in the tail direction synchronously advances from the reference installation point towards the tail, and the installation speed is consistent with that in the head direction.

[0024] When working, by changing the original sequential installation from the head or the tail to the installation starting from the middle of the cut towards the head and the tail respectively when installing the supports in the cut, this can avoid the problem that the supports withdrawn from the retreating face cannot be installed in time, resulting in the lag of the construction progress, thereby accelerating the construction speed and avoiding replacing the end transition supports at the same time.

[0025] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. A support installation construction process for a direct transfer working face without a reversing chamber, characterized in that, The steps are as follows: Step 1: Preparation stage. According to the mine geological conditions and roadway layout, determine the specific conditions of the direct transfer working face, including the structures of the cutting eye and the gate roadway, and the limiting conditions without a reversing chamber, and prepare the required hydraulic supports, scraper conveyors (support vehicles) and special vehicles; Step 2: Process planning stage. Set a reference installation point in the middle of the cutting eye to divide the head operation area and the tail operation area, and establish a two-way transportation route; Step 3: Support transportation. Transport the hydraulic supports withdrawn from the retreating face to the middle position of the cutting eye of the new face through the support vehicle; Step 4: Optimized installation. Start installing the first set of hydraulic supports at the middle position of the cutting eye as the reference point for the subsequent two-way installation of the head and the tail; Step 5: Synchronous construction. After the installation of the first set of hydraulic supports is completed, sequentially install the remaining hydraulic supports from the middle position to the head and the tail directions simultaneously, improving the construction efficiency; Step 6: Completion stage. After the installation of all hydraulic supports is completed, conduct functional debugging and safety inspection of the equipment to ensure the installation quality.

2. The support installation construction process of a direct transfer working face without a reversing chamber according to claim 1, characterized in that: In Step 1, the direct transfer working face includes the working face belt conveyor gate roadway (1), the working face cutting eye (2), the working face auxiliary return gate roadway (3), the transportation connection roadway (4) and the auxiliary return connection roadway (5).

3. The support installation construction process for a direct transfer working face without a reversing chamber according to claim 1, characterized in that, The method for determining the reference installation point in Step 2 is: according to the total length of the cutting eye, select the central area within the range of 5% in the middle as the reference installation point.

4. The support installation construction process of a direct transfer working face without a reversing chamber according to claim 1, characterized in that, The transportation route of the hydraulic supports in Step 3 is: directly reach the middle of the cutting eye (2) through the working face belt conveyor gate roadway (1) to form a "head - middle - tail" triangular circular transportation path.

5. The support installation construction process of a direct transfer working face without a reversing chamber according to claim 1, characterized in that: In Step 3, the support vehicle is equipped with a two-way communication system and a laser positioning system to receive the installation progress instructions in real time to adjust the transportation progress.

6. The support installation construction process of a direct transfer working face without a reverse chamber according to claim 5, characterized in that: The two-way communication system is used to receive the installation progress data and send dynamic adjustment transportation instructions, and adopts a wireless communication module certified for mine explosion protection, supporting at least one signal transmission method of the LoRa long-distance low-power communication protocol or the 5G private network ultra-low latency communication protocol.

7. A support installation construction process for a direct transfer working face without a reverse chamber according to claim 5, characterized in that: The laser positioning module is used to calibrate the support spacing to ensure that the spacing error is controlled within ±5 cm.

8. The bracket installation construction process for a direct transfer working face without a reversing chamber according to claim 1, characterized in that, The implementation method of synchronous installation in Step 4 is: configure at least two independently operated hydraulic support installation devices, which are respectively responsible for the installation operations in the head direction and the tail direction.

9. The bracket installation construction process for a direct transfer working face without a reversing chamber according to claim 1, characterized in that: In Step 5, the installation group in the head direction advances from the reference installation point to the head, and sends a progress signal to the dispatching center after installing each support. The installation group in the tail direction synchronously advances from the reference installation point to the tail, and the installation speed is consistent with that in the head direction.

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