Rapid construction equipment and construction method for large-mining-height working face

Abstract

The invention discloses rapid construction equipment for a large mining height working face. The rapid construction equipment comprises a formwork hanging device for formwork hanging, a self-moving concrete pump for mine concrete pouring, a unit support for temporary supporting and a unit support carrying vehicle. The mold hanging device is arranged close to the end head frame of the working surface; the unit support is arranged close to the flexible formwork wall side by following the formwork hanging device, the self-moving concrete pump is arranged on the flexible formwork wall side in the gob-side entry retaining roadway, and after the pouring distance meets the scheme design requirement, walking is controlled to move forwards through wireless remote control. According to the rapid construction equipment for the large mining height working face, the problem that the entry retaining speed is difficult to follow the stoping speed is solved, and normal stoping of the working face is not affected while the number of operators is reduced and the labor intensity is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of coal mine construction equipment, specifically relating to rapid construction equipment for high-extraction working faces, and also to a rapid construction method for high-extraction working faces. Background Technology

[0002] Goaf preservation, a typical "pillarless mining" technology, avoids the resource waste caused by traditional "coal pillar protection" by retaining the original roadways on the goaf side. It also reduces roadway excavation, playing a crucial role in improving resource recovery rates, reducing the excavation rate per 10,000 tons, and alleviating the conflict between mining and excavation continuity. Especially under the "dual carbon" goals, goaf preservation, as one of the core technologies of the green coal mining system, has been included in the key promotion scope of national policies such as the "Guidelines for Intelligent Coal Mine Construction" and the "Catalogue of Advanced and Applicable Technologies for Mineral Resource Conservation and Comprehensive Utilization."

[0003] High-extraction longwall faces present complex conditions for gob-side roadway retention that differ from conventional longwall faces due to their large mining height. Furthermore, if the advance speed of the high-extraction longwall face is too fast and the construction speed cannot keep up, it will severely restrict the mining speed of the face, affecting the normal mining operation. Moreover, it will cause the roadway retention to lag behind the face advance, easily leading to safety hazards such as air leakage and gas accumulation in the goaf. To address the urgent need for efficient, safe, and green coal mining, and to promote technological progress in my country's coal industry, this paper proposes rapid construction equipment and methods for gob-side roadway retention in high-extraction longwall faces. Summary of the Invention

[0004] The first objective of this invention is to provide rapid construction equipment for high-extraction working faces, which solves the problem that the speed of roadway retention is difficult to keep up with the mining speed, reducing the number of workers and labor intensity without affecting the normal mining of the working face.

[0005] To achieve the above objectives, the technical solution adopted by this invention is: a rapid construction equipment for high-extraction working faces, including a formwork hanging device, a self-propelled concrete pump for mine concrete pouring, a unit support for temporary support, and a unit support transport vehicle; the formwork hanging device is arranged close to the end frame of the working face; the unit support is arranged close to the formwork hanging device near the flexible formwork wall; the self-propelled concrete pump is arranged on the flexible formwork wall side in the goaf roadway; after the pouring distance reaches the design requirements, it moves forward using wireless remote control.

[0006] The technical solution of the present invention also has the following characteristics:

[0007] The mold hanging device is used for hanging flexible molds and consists of a front frame and two rear frames. Both the front frame and the two rear frames are single frames. Each single frame consists of a top beam, a base, and telescopic columns. The top beam is arranged on the base in a way that allows it to be raised and lowered via the telescopic columns. A pushing device is provided between the front frame and the rear frame.

[0008] There are two hanging mold devices.

[0009] The two hanging mold devices are connected by a pushing device.

[0010] The unit support is used as a temporary support for the working face roadway and includes a top beam, a base and telescopic columns. The top beam is arranged on the base through the telescopic columns.

[0011] The unit support transport vehicle is a special equipment used for the rapid relocation, loading and unloading of unit supports and auxiliary operations, realizing the integration of handling, transportation and unloading, and enabling the rapid erection of unit supports.

[0012] The second objective of this invention is to provide a rapid construction method for high-extraction working faces, which solves the problem that the speed of roadway retention is difficult to keep up with the mining speed, reducing the number of workers and labor intensity without affecting the normal mining of the working face.

[0013] To achieve the above objectives, the technical solution adopted by the present invention is: a rapid construction method for high mining faces, which is implemented according to the following steps; Step 1: As the working face is pushed forward and the support frame is moved, the top beam of the formwork device supports the roof. Step 2: As the working face advances, flexible templates are installed inside the template hanging device.

[0014] Step 3: After the installation is completed, pour concrete in a concentrated manner using the flexible formwork; Step 4: After the pouring is completed, the formwork device 1 is removed from the formwork and moved forward, and is supported by unit brackets.

[0015] Step 5: As the working face continues to advance, once the concrete strength of the first-poured flexible formwork wall reaches the design requirements, the last unit support is moved to the side of the newly poured flexible formwork wall for reuse using a unit support transport vehicle. Step 6: Repeat steps 1 to 5 above until the entire roadway retention work along the goaf is completed.

[0016] The technical solution of the present invention also has the following characteristics: In step 3, two flexible templates can be hung at the same time.

[0017] In step 3: the automated and mechanized formwork hanging device can hang up to two 3-5m flexible formworks at the same time.

[0018] In step 3: a self-propelled concrete pump is used for concrete pouring; the flexible formwork is poured first, with the last one poured; when the working face continues to advance, the middle pushing device of the formwork device is used to continue pushing the front frame of the formwork device forward to ensure the temporary support requirements of the roof after the end of the roadway in the goaf, while meeting the progress of the working face; after the self-propelled concrete pump reaches the design requirements of the scheme, it is moved forward by wireless remote control.

[0019] The beneficial effects of this invention are: (1) This invention provides a rapid construction equipment for roadway retention along the goaf in high mining face. When retaining roadway formwork, it realizes automated and mechanized formwork hanging. The formwork hanging device plays a temporary support role and realizes flexible formwork shaping and rapid support of flexible formwork.

[0020] (2) This invention provides a rapid construction equipment for roadway retention along the goaf in high mining face. The self-moving concrete pump realizes automated control in terms of start-up and shutdown, secondary mixing and forward and reverse pumping. The automated movement of the concrete pump reduces the preparation time and workload of movement, reduces the labor intensity of workers, and improves the working environment.

[0021] (3) The present invention provides a rapid construction equipment for roadway retention along the goaf in high mining face. The unit support structure is simple, the support strength is high, and it can be reused, which is suitable for the needs of rapid construction.

[0022] (4) This invention provides a rapid construction equipment for roadway retention along the goaf in high mining face. The unit support transport vehicle realizes the integration of transporting, unloading and moving, realizes rapid erection of unit supports, improves support efficiency and safety, reduces the number of workers and reduces labor intensity.

[0023] (5) The present invention provides a rapid construction method for roadway retention along the goaf in high mining face: based on roadway retention construction equipment, while ensuring the safety of roadway retention operation when performing roadway retention along the goaf in high mining face, the roadway retention operation speed does not affect the mining speed of the working face. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the plan layout of the equipment and method for rapid construction of gob-side roadway retention in a high-extraction working face provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the plan and position of the automated and mechanized formwork hanging device for rapid construction equipment and method for gob-side roadway retention in high mining faces, provided in an embodiment of the present invention. Figure 3This is a schematic diagram of a self-propelled concrete pump used for rapid construction equipment and method for roadway retention along the goaf in high mining faces, as provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the unit support position for the rapid construction equipment and method for roadway retention along the goaf in a high mining face, provided in an embodiment of the present invention.

[0025] In the diagram, 1. Hanging formwork device, 2. Unit support, 3. Unit support transport vehicle, 4. Self-propelled concrete pump, 5. Flexible formwork wall, 6. End support, 7. Lane leaving gaps along the road. Detailed Implementation

[0026] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1 like Figure 1-4 As shown. The rapid construction equipment for the gob-side retaining roadway in a high-extraction working face includes a formwork hanging device 1; a self-propelled concrete pump 4 for mine concrete pouring; unit supports 2 and unit support transport vehicles 3 for temporary support, etc. The formwork hanging device 1 is positioned close to the end frame 6 of the working face; the unit supports 2 are positioned close to the formwork hanging device 1 near the flexible formwork wall 5. The self-propelled concrete pump 4 is positioned on the side of the flexible formwork wall 5 within the gob-side retaining roadway 7. After the pouring distance reaches the design requirements, it moves forward using wireless remote control.

[0028] The formwork hanging device 1 is mainly used for hanging flexible formwork. It consists of a front frame 17, a rear frame 18, and a middle pushing device 19. It is 8m long and can hang two 4m flexible formworks at a time.

[0029] The front and rear frames of the formwork hanging device are both single frames, including top beams, bases, columns, etc., with the space in the middle of the frames for hanging flexible formwork. A pushing device is set between the front and rear frames, with a pushing step distance of 3m, to ensure that when the progress of the working face is greater than 8m, the gap between the front frame and the end support meets the requirements. The formwork hanging device 1 has the functions of temporary support, autonomous frame moving, flexible formwork shaping, and rapid hanging of flexible formwork.

[0030] The self-propelled concrete pump 4 is mainly used for concrete pouring of flexible formwork walls 5, including a walking system, a working system and an automated control system.

[0031] The walking system uses 15 tracks for movement and is controlled wirelessly. The working system is a self-propelled concrete pumping system, also controlled wirelessly. The automated control system is an electro-hydraulic control system, enabling wireless remote control of concrete pumping and movement.

[0032] The self-propelled concrete pump 4 automates the relocation of concrete pumps, reduces preparation time and workload, lowers labor intensity, and improves the working environment.

[0033] Unit support 2 is mainly used as temporary support for the working face roadway. Unit support 2 adopts a two-column structure, consisting of a top beam 12, a base 14, and a column 13. After the flexible formwork wall 5 is poured, the formwork device 1 is removed and moved forward. Unit support 2 is then moved to the vicinity of the flexible formwork wall 5 using a unit support transport vehicle for installation and pressure connection. The unit supports are arranged in a row to reduce the impact of dynamic pressure from the working face on the young flexible formwork wall 5. Unit support 2 has a simple structure, high support strength, is easy to install, and is reusable, making it suitable for rapid construction.

[0034] The unit support transport vehicle 3 is a special equipment mainly used for the rapid relocation, loading and unloading of unit supports 2 and auxiliary operations. The unit support transport vehicle 2 realizes the integration of handling, transporting and unloading, realizes the rapid erection of unit supports, improves support efficiency and safety, and at the same time reduces the number of operators and reduces labor intensity.

[0035] Example 2 The present invention provides a rapid construction method for high-extraction working faces, which is implemented according to the following steps: Step 1: As the working face is pushed forward and the frame is moved, the formwork device 1 behind the end frame 6 of the working face moves forward with the advancement of the working face. The top beam of the formwork device 1 provides temporary support for the roof behind the end frame 6 of the working face, ensuring the safety of the roof in the space behind the frame.

[0036] Step 2: As the working face advances, when the forward length of the formwork hanging device 1 is sufficient to hang two flexible formwork positions, the flexible formwork is hung inside the formwork hanging device 1.

[0037] Step 3: The formwork hanging device 1 can hang two 3m flexible formworks at the same time. After the formworks are hung, the two flexible formworks are poured together. The concrete is poured using a self-propelled concrete pump 4. The flexible formwork is generally poured first, with the rear one poured first. When the working face continues to advance, the middle pushing device 19 of the formwork hanging device is used to push the front frame of the formwork hanging device forward to ensure the temporary support requirements of the roof after the end frame 6 of the roadway 7 along the goaf, while also meeting the progress of the working face. After the self-propelled concrete pump 4 reaches the design requirements of the plan in distance from the working face, it is moved forward by wireless remote control.

[0038] Step 4: The pouring of the flexible formwork is completed during the maintenance shift. When the work shift continues production, the concrete age meets the requirement for the formwork hanging device 1 to be removed and moved forward. After the formwork hanging device 1 is removed and moved forward, the unit support 2 is promptly erected next to the flexible formwork wall 5 according to the design requirements using the unit support transport vehicle 3, and pressure is applied to the top to achieve the purpose of temporary support, so as to reduce the impact of the dynamic pressure of the working face on the flexible formwork wall 5 when the concrete strength has not fully reached the design strength.

[0039] Step 5: Continue mining as the working face advances. Once the concrete strength of the first-cast flexible formwork wall 5 reaches the design requirements, use the unit support transport vehicle 3 to move the last unit support 2 to the side of the newly cast flexible formwork wall for reuse.

[0040] Step 6: Repeat steps 1 to 5 above until the entire roadway 7 is completed.

[0041] Example 3 The present invention provides a rapid construction method for high-extraction working faces, which is implemented according to the following steps: Step 1: As the working face is pushed forward and the frame is moved, the formwork device 1 behind the end frame 6 of the working face moves forward with the advancement of the working face. The top beam of the formwork device 1 provides temporary support for the roof behind the end frame 6 of the working face, ensuring the safety of the roof in the space behind the frame.

[0042] Step 2: As the working face advances, when the forward length of the formwork hanging device 1 is sufficient to hang two flexible formwork positions, the flexible formwork is hung inside the formwork hanging device 1.

[0043] Step 3: The formwork hanging device 1 can hang two 3.5m flexible formworks at the same time. After the formworks are hung, the two flexible formworks are poured together. The concrete is poured using a self-propelled concrete pump 4. The flexible formwork is generally poured first, with the rear one poured first. When the working face continues to advance, the middle pushing device 19 of the formwork hanging device is used to push the front frame of the formwork hanging device forward to ensure the temporary support requirements of the roof after the end frame 6 of the roadway 7 along the goaf, while also meeting the progress of the working face. After the self-propelled concrete pump 4 reaches the design requirements of the plan in distance from the working face, it is moved forward by wireless remote control.

[0044] Step 4: The pouring of the flexible formwork is completed during the maintenance shift. When the work shift continues production, the concrete age meets the requirement for the formwork hanging device 1 to be removed and moved forward. After the formwork hanging device 1 is removed and moved forward, the unit support 2 is promptly erected next to the flexible formwork wall 5 according to the design requirements using the unit support transport vehicle 3, and pressure is applied to the top to achieve the purpose of temporary support, so as to reduce the impact of the dynamic pressure of the working face on the flexible formwork wall 5 when the concrete strength has not fully reached the design strength.

[0045] Step 5: Continue mining as the working face advances. Once the concrete strength of the first-cast flexible formwork wall 5 reaches the design requirements, use the unit support transport vehicle 3 to move the last unit support 2 to the side of the newly cast flexible formwork wall for reuse.

[0046] Step 6: Repeat steps 1 to 5 above until the entire roadway 7 is completed.

[0047] Step 7: Repeat steps 1-6 until the entire working face is left open.

[0048] Example 4 The present invention provides a rapid construction method for high-extraction working faces, which is implemented according to the following steps: Step 1: As the working face is pushed forward and the frame is moved, the formwork device 1 behind the end frame 6 of the working face moves forward with the advancement of the working face. The top beam of the formwork device 1 provides temporary support for the roof behind the end frame 6 of the working face, ensuring the safety of the roof in the space behind the frame.

[0049] Step 2: As the working face advances, when the forward length of the formwork hanging device 1 is sufficient to hang two flexible formwork positions, the flexible formwork is hung inside the formwork hanging device 1.

[0050] Step 3: The formwork hanging device 1 can hang two 4m flexible formworks at the same time. After the formworks are hung, the two flexible formworks are poured together. The concrete is poured using a self-propelled concrete pump 4. The flexible formwork is generally poured first, with the rear one poured first. When the working face continues to advance, the middle pushing device 19 of the formwork hanging device is used to push the front frame of the formwork hanging device forward to ensure the temporary support requirements of the roof after the end frame 6 of the roadway 7 along the goaf, while also meeting the progress of the working face. After the self-propelled concrete pump 4 reaches the design requirements of the plan in distance from the working face, it is moved forward by wireless remote control.

[0051] Step 4: The pouring of the flexible formwork is completed during the maintenance shift. When the work shift continues production, the concrete age meets the requirement for the formwork hanging device 1 to be removed and moved forward. After the formwork hanging device 1 is removed and moved forward, the unit support 2 is promptly erected next to the flexible formwork wall 5 according to the design requirements using the unit support transport vehicle 3, and pressure is applied to the top to achieve the purpose of temporary support, so as to reduce the impact of the dynamic pressure of the working face on the flexible formwork wall 5 when the concrete strength has not fully reached the design strength.

[0052] Step 5: Continue mining as the working face advances. Once the concrete strength of the first-cast flexible formwork wall 5 reaches the design requirements, use the unit support transport vehicle 3 to move the last unit support 2 to the side of the newly cast flexible formwork wall for reuse.

[0053] Step 6: Repeat steps 1 to 5 above until the entire roadway 7 is completed.

[0054] Example 5 The present invention provides a rapid construction method for high-extraction working faces, which is implemented according to the following steps: Step 1: As the working face is pushed forward and the frame is moved, the formwork device 1 behind the end frame 6 of the working face moves forward with the advancement of the working face. The top beam of the formwork device 1 provides temporary support for the roof behind the end frame 6 of the working face, ensuring the safety of the roof in the space behind the frame.

[0055] Step 2: As the working face advances, when the forward length of the formwork hanging device 1 is sufficient to hang two flexible formwork positions, the flexible formwork is hung inside the formwork hanging device 1.

[0056] Step 3: The formwork hanging device 1 can hang two 4.5m flexible formworks at the same time. After the formworks are hung, the two flexible formworks are poured together. The concrete is poured using a self-propelled concrete pump 4. The flexible formwork is generally poured first, with the rear one poured first. When the working face continues to advance, the middle pushing device 19 of the formwork hanging device is used to push the front frame of the formwork hanging device forward to ensure the temporary support requirements of the roof after the end frame 6 of the roadway 7 along the goaf, while meeting the progress of the working face. After the self-propelled concrete pump 4 reaches the design requirements of the plan in distance from the working face, it is moved forward by wireless remote control.

[0057] Step 4: The pouring of the flexible formwork is completed during the maintenance shift. When the work shift continues production, the concrete age meets the requirement for the formwork hanging device 1 to be removed and moved forward. After the formwork hanging device 1 is removed and moved forward, the unit support 2 is promptly erected next to the flexible formwork wall 5 according to the design requirements using the unit support transport vehicle 3, and pressure is applied to the top to achieve the purpose of temporary support, so as to reduce the impact of the dynamic pressure of the working face on the flexible formwork wall 5 when the concrete strength has not fully reached the design strength.

[0058] Step 5: Continue mining as the working face advances. Once the concrete strength of the first-cast flexible formwork wall 5 reaches the design requirements, use the unit support transport vehicle 3 to move the last unit support 2 to the side of the newly cast flexible formwork wall for reuse.

[0059] Step 6: Repeat steps 1 to 5 above until the entire roadway 7 is completed.

[0060] Example 6 The present invention provides a rapid construction method for high-extraction working faces, which is implemented according to the following steps: Step 1: As the working face is pushed forward and the frame is moved, the formwork device 1 behind the end frame 6 of the working face moves forward with the advancement of the working face. The top beam of the formwork device 1 provides temporary support for the roof behind the end frame 6 of the working face, ensuring the safety of the roof in the space behind the frame.

[0061] Step 2: As the working face advances, when the forward length of the formwork hanging device 1 is sufficient to hang two flexible formwork positions, the flexible formwork is hung inside the formwork hanging device 1.

[0062] Step 3: The formwork hanging device 1 can hang two 5m flexible formworks at the same time. After the formworks are hung, the two flexible formworks are poured together. The concrete is poured using a self-propelled concrete pump 4. The flexible formwork is generally poured first, with the rear one poured first. When the working face continues to advance, the middle pushing device 19 of the formwork hanging device is used to push the front frame of the formwork hanging device forward to ensure the temporary support requirements of the roof after the end frame 6 of the roadway 7 along the goaf, while also meeting the progress of the working face. After the self-propelled concrete pump 4 reaches the design requirements of the plan in distance from the working face, it is moved forward by wireless remote control.

[0063] Step 4: The pouring of the flexible formwork is completed during the maintenance shift. When the work shift continues production, the concrete age meets the requirement for the formwork hanging device 1 to be removed and moved forward. After the formwork hanging device 1 is removed and moved forward, the unit support 2 is promptly erected next to the flexible formwork wall 5 according to the design requirements using the unit support transport vehicle 3, and pressure is applied to the top to achieve the purpose of temporary support, so as to reduce the impact of the dynamic pressure of the working face on the flexible formwork wall 5 when the concrete strength has not fully reached the design strength.

[0064] Step 5: Continue mining as the working face advances. Once the concrete strength of the first-cast flexible formwork wall 5 reaches the design requirements, use the unit support transport vehicle 3 to move the last unit support 2 to the side of the newly cast flexible formwork wall for reuse.

[0065] Step 6: Repeat steps 1 to 5 above until the entire roadway 7 is completed.

Claims

1. Equipment for rapid construction in high-extraction working faces, characterized in that, It includes a formwork hanging device, a self-propelled concrete pump for mine concrete pouring, a unit support for temporary support, and a unit support transport vehicle; the formwork hanging device is arranged close to the end frame of the working face; the unit support is arranged close to the formwork hanging device near the flexible formwork wall; the self-propelled concrete pump is arranged on the side of the flexible formwork wall in the goaf roadway; after the pouring distance reaches the design requirements, it moves forward using wireless remote control.

2. The rapid construction equipment for high-extraction working faces according to claim 1, characterized in that, The mold hanging device is used for hanging flexible molds and consists of a front frame and two rear frames. Both the front frame and the two rear frames are single frames. Each single frame consists of a top beam, a base, and telescopic columns. The top beam is arranged on the base in a way that allows it to be raised and lowered via the telescopic columns. A pushing device is provided between the front frame and the rear frame.

3. The rapid construction equipment for high-extraction working faces according to claim 2, characterized in that, There are two hanging mold devices.

4. Equipment for rapid construction in high-extraction working faces, characterized in that: The two hanging mold devices are connected by a pushing device.

5. The rapid construction equipment for high-extraction working faces according to claim 4, characterized in that, The unit support is used as a temporary support for the working face roadway and includes a top beam, a base and telescopic columns. The top beam is arranged on the base through the telescopic columns.

6. The rapid construction equipment for high-extraction working faces according to claim 5, characterized in that, The unit support transport vehicle is a special equipment used for the rapid relocation, loading and unloading of unit supports and auxiliary operations, realizing the integration of handling, transportation and unloading, and enabling the rapid erection of unit supports.

7. A rapid construction method for high-extraction working faces, characterized in that, The specific steps are as follows: Step 1: As the working face is pushed forward and the support frame is moved, the top beam of the formwork device supports the roof. Step 2: As the working face advances, flexible templates are installed inside the template hanging device; Step 3: After the installation is completed, pour concrete in a concentrated manner using the flexible formwork; Step 4: After the pouring is completed, the formwork device 1 is removed from the formwork and moved forward, and is supported by unit brackets; Step 5: As the working face continues to advance, once the concrete strength of the first-poured flexible formwork wall reaches the design requirements, the last unit support is moved to the side of the newly poured flexible formwork wall for reuse using a unit support transport vehicle. Step 6: Repeat steps 1 to 5 above until the entire roadway retention work along the goaf is completed.

8. The rapid construction method for high-extraction working faces according to claim 7, characterized in that, In step 3, two flexible templates can be hung at the same time.

9. The method for rapid construction of high-extraction working faces according to claim 8, characterized in that, In step 3: the automated and mechanized formwork hanging device can hang up to two 3-5m flexible formworks at the same time.

10. The method for rapid construction of high-extraction working faces according to claim 9, characterized in that, In step 3: a self-propelled concrete pump is used for concrete pouring; the flexible formwork is poured first, with the last one poured; when the working face continues to advance, the middle pushing device of the formwork device is used to continue pushing the front frame of the formwork device forward to ensure the temporary support requirements of the roof after the end of the roadway in the goaf, while meeting the progress of the working face; after the self-propelled concrete pump reaches the design requirements of the scheme, it is moved forward by wireless remote control.

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