Anti-collapse permeable anti-outage mine ground emergency UPS (Uninterrupted Power Supply) power supply system and construction process thereof

Abstract

The invention discloses an anti-collapse permeable anti-outage mine ground emergency UPS power supply system and a construction technology thereof, and belongs to the technical field of mine safety and emergency power supply. The system comprises a ground explosion-proof master control electricity taking cabinet, a high-redundancy input / emergency / energy storage / output power supply unit, an underground load and a fully-sealed junction box. The system is characterized in that the emergency power supply equipment, the energy storage battery pack and all the cables are arranged in a protection structure under the ground, and fully buried layout is realized. The protection structure comprises a macroporous reticular reinforced concrete structure with bearing and water-permeable heat dissipation functions, four layers of composite sealing glue protection bodies (sequentially including a sealing bonding layer, a corrosion-resistant layer, a buffer energy-absorbing layer and an outer anti-extrusion water-permeable and air-permeable layer) wrapping equipment, and an external buffer filling layer. The construction technology comprises the steps of structure construction, equipment glue sealing, S-shaped redundant wiring, high-compactness landfill and the like. According to the invention, through a daily immediate emergency operation mode, full-link multi-stage redundant power supply and deep protection design, the problems of weak environmental survivability, low reliability and operation and maintenance failure of a traditional system are solved, zero power supply interruption, high reliability and no maintenance under extreme disasters such as collapse, water permeation and impact are realized, and the system is especially suitable for underground mines such as coal mines and metal mines.

Description

Emergency UPS Power Supply System for Mine Surface with Resistance to Collapse, Water Permeability, and Power Outage and its Construction Technology Technical Field

[0001] This invention relates to the field of mine safety production and emergency support technology, specifically to a fully buried, highly redundant, and resistant emergency uninterruptible power supply (UPS) system suitable for extreme working conditions in mines, and its supporting standardized deep-buried construction process. Background Technology

[0002] Emergency power supply systems in mines are core infrastructure for ensuring the safety of underground personnel, maintaining critical ventilation and lighting, and supporting disaster relief. However, existing mine emergency power supply systems generally suffer from the following structural defects: weak environmental resilience: existing equipment is mostly deployed in open-air or shallow-buried locations, with a large amount of equipment and power lines exposed, lacking effective protection against the harsh underground environment of mines, such as high humidity, high corrosion, susceptibility to collapse, and susceptibility to groundwater immersion. In the event of combined disasters such as collapses, explosions, and water inrushes, the systems are highly susceptible to instantaneous paralysis due to physical damage to equipment or breakage of power lines.

[0003] Low system reliability: The power supply architecture is mostly a simple link with a single input, a single UPS host, and a single battery pack, posing a serious risk of single point of failure. Failure of any node can lead to a complete interruption of emergency power supply, failing to meet the extremely high requirements of mines for power supply continuity.

[0004] Operation and maintenance mode failure: The "standby idle" mode is generally adopted, and the equipment is not used for operation for a long time. This can easily lead to the failure to detect potential faults such as battery performance degradation and hidden aging of components in a timely manner, resulting in the industry problem of "formal emergency response" that is "qualified during acceptance, normal during drills, and ineffective during real accidents".

[0005] Lack of construction technology: There is a lack of standardized and specialized construction technology that matches the complex geological and hydrological conditions of the mine. Non-standard installation and protection further reduce the long-term stability and disaster resistance capability of the system.

[0006] Therefore, developing an emergency power supply system and its construction method that can truly withstand extreme disasters such as collapses, soaking, and impacts, and achieve "daily operation, emergency use, high reliability, and maintenance-free operation" has become an urgent need in the field of mine safety. Summary of the Invention

[0007] The technical problem to be solved: This invention aims to overcome the shortcomings of the prior art and provide a mine surface emergency UPS power supply system and its construction process that is resistant to collapse, permeable, and protected against power outages, so as to systematically solve the core defects of the prior art in terms of environmental adaptability, power supply reliability, operation and maintenance mode and construction feasibility.

[0008] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: Solution 1: A surface emergency UPS power supply system for mines that is resistant to collapse, water permeability, and power outages. This system includes a surface explosion-proof main control power cabinet, an input power supply unit, an emergency power supply unit, an energy storage unit, an output power supply unit, a fully sealed emergency junction box buried under the mine cover, and a load unit; the input power supply unit includes one main input cable and at least one backup input cable; the emergency power supply unit includes at least two emergency UPS power supply devices connected in parallel; the energy storage unit includes at least two sets of main energy storage battery packs connected in parallel, electrically connected to the emergency UPS power supply devices; the output power supply unit includes one main input cable and at least one backup input cable; the system includes at least two parallel-connected emergency UPS power supply devices; the system includes at least two parallel-connected main energy storage battery packs, electrically connected to the emergency UPS power supply devices; the output power supply unit includes one main input cable and at least one backup input cable. The system includes an output power cable and at least one output backup cable; the load unit is connected to the output power unit and includes at least a mine explosion-proof ventilation load and a mine explosion-proof lighting load; the ground explosion-proof main control power cabinet integrates a fully automatic switching module for daily and emergency power supply; the emergency UPS power supply equipment, main energy storage battery pack, and all power supply cables are all installed in a protective structure below ground, forming a fully buried layout; the protective structure includes: a large-pore mesh reinforced concrete structure on which the emergency UPS power supply equipment and main energy storage battery pack are installed; a multi-layer composite sealant protective body wrapped around the equipment; and a landfill layer filling and covering the outside of the protective body.

[0009] Furthermore, the multi-layer composite sealant protective body comprises, from the inside out: a base sealing and bonding layer with a thickness of 2-4 cm; a corrosion-resistant protective layer with a thickness of 4-6 cm; a buffer energy-absorbing layer with a thickness of 6-8 cm; and an outer anti-extrusion, water-permeable, and air-permeable layer with a thickness of 4-6 cm.

[0010] Furthermore, the pore size of the large-pore mesh reinforced concrete structure is 80-150mm, and the porosity is 18%-25%.

[0011] Furthermore, the routing paths of the input backup cable and the output backup cable are S-shaped and their routing length is greater than the theoretical straight path length, so as to provide tensile redundancy for the cables.

[0012] Furthermore, the system also integrates a fault self-diagnosis and load monitoring module.

[0013] Option 2: A construction process for building the system described in Option 1. This process includes the following steps: S1. Construction preparation: Conduct geological surveys to determine the system layout location, depth, and equipment parameters, and prepare the corresponding materials; S2. Structural construction: Excavate the foundation pit, tie the steel reinforcement frame, and pour large-pore modified concrete as a whole to form a large-pore mesh reinforced concrete structure, and then cure it; S3. Equipment installation and multi-layer sealing: Install emergency UPS power supply equipment and main energy storage battery pack on the structure; then pour and cure the base sealing adhesive layer, corrosion-resistant protective layer, buffer energy absorption layer, and outer anti-extrusion permeable and breathable layer in sequence to form a composite sealing protective body with a total thickness of 15-25cm; S4. Redundant cable laying: Use mining flame-retardant and waterproof armored cables, and lay the main power cable and backup cable in an S-shaped detour. The cable and equipment connection is double-fixed by welding and crimping and sealed. There are no intermediate joints in the cable throughout the entire process; S5. Outer layer filling: A mixture of fine sand and gravel is used for layered filling and compaction around the protective structure, with a density of not less than 93%; S6. Manhole cover installation: High-strength load-bearing explosion-proof power supply manhole covers are installed on the ground, and the manhole covers are equipped with waterproof and explosion-proof power supply interfaces; S7. System debugging: Daily power supply, emergency mode switching, load operation and fault simulation tests are conducted.

[0014] Compared with existing technologies, the system and process described in this invention have the following beneficial effects: extremely high system resilience and reliability: the "normal operation mode is also an emergency operation mode" keeps the equipment in an active state at all times, and combined with the full-link multi-level redundancy design of input, host, battery and output, the risk of single point of failure is completely eliminated, ensuring uninterrupted power supply to critical loads under any extreme disaster.

[0015] It possesses outstanding adaptability to extreme environments: the unique 4-layer functional composite sealant protection body and large-pore mesh reinforced concrete structure enable the core of the system to reach the IP68 protection level, which can withstand long-term immersion in groundwater, acid and alkali corrosion, soil pressure and groundwater buoyancy, realizing "long-term buried and immersion operation".

[0016] Significantly enhances physical impact resistance: The S-shaped winding cabling, combined with more than three times the length redundancy and a high-density outer buffer filling, effectively absorbs and disperses the impact and tensile stress generated by collapses and explosions, fundamentally preventing the "cable breakage" problem.

[0017] It achieves intelligent and low-maintenance operation: The system integrates automatic switching, fault self-inspection and load monitoring functions to achieve "zero-delay automatic emergency response and early warning of faults", which greatly reduces the complexity of operation and maintenance, personnel dependence and life cycle cost.

[0018] It has good standardization and scalability: the whole set of construction process steps are clear and the parameters are well defined. The main landfill materials can be sourced locally, which can be adapted to the geological and hydrological conditions of various mines, making it easy to carry out large-scale construction, renovation and promotion within the industry. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of the emergency power supply system of the present invention.

[0020] Figure 2 is a cross-sectional schematic diagram of the four-layer sealant protective body and the large-pore mesh reinforced concrete structure of the core equipment of the present invention.

[0021] In the diagram: 101-Ground explosion-proof main control power cabinet, 201-Main power input cable, 202, 203, 204-Input backup cables, 301, 302-Emergency UPS power supply equipment, 401, 402, 403, 404-Main energy storage battery pack, 501-Output power supply cable, 502, 503, 504-Output backup cables, 601-Buried fully sealed emergency junction box under the manhole cover, 701-Mining explosion-proof ventilation load, 702-Mining explosion-proof camera lighting load, 703-Underground terminal emergency lighting, 801-Core electronic structure of UPS and energy storage battery, 802-Base sealing and bonding layer, 803-Corrosion resistant protective layer, 804-Buffer energy absorption layer, 805-Outer anti-compression permeable and breathable layer, 806-Large-pore mesh reinforced concrete structure, 807-Permeable heat dissipation holes, 808-Crushed stone and fine sand buffer filling layer. Detailed Implementation

[0022] The implementation of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings and embodiments. The following embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0023] The example uses a coal mine with a high groundwater level and the risk of roof collapse as an application scenario.

[0024] After on-site investigation during the construction phase, the installation area was determined, ensuring that the top surface of the large-pore mesh reinforced concrete structure (806) was 1.2 meters below the stable groundwater level. The foundation pit was excavated, HRB400E grade densified bidirectional steel bars (200mm spacing) were tied, and after formwork was erected, C30 large-pore modified concrete was poured, controlling the average pore diameter to 100mm and the porosity to 22%, forming the structure (806), which was then cured for 72 hours.

[0025] Two online UPS main units (301, 302) and four lithium-ion energy storage battery packs (401-404) are installed on the structure (806).

[0026] Perform 4-layer sealing and protection construction: Pour the first layer (802): Use two-component polyamide electronic potting compound, 3cm thick, to evenly wrap the bottom and side walls of the equipment, and cure for 24 hours.

[0027] The second layer (803) is poured: using vinyl ester anticorrosive resin, 5cm thick, to completely cover the first layer, and cured for 36 hours.

[0028] The third layer (804) is poured: inorganic flame-retardant mineral foam adhesive is used, with a thickness of 7cm and a curing time of 48 hours.

[0029] The fourth layer (805) is poured: a 5cm thick modified phenolic anti-extrusion adhesive with an open structure is used and cured for 24 hours. This ultimately forms a complete protective structure with a total thickness of 20cm.

[0030] Lay mine-use flame-retardant and waterproof armored cables. The main power supply cable (201, 501) and three backup cables (202-204, 502-504) are laid independently in an S-shaped path, with a reserved length of not less than three times the straight-line distance. All electrical connections are fully welded and then crimped, and treated with sealant.

[0031] A mixture of local fine sand and crushed stone (volume ratio 2:1) is used to backfill the protective structure in layers around and above it. Each layer is 40-50cm thick and is compacted with a plate rammer to achieve an overall density of over 93%, forming a buffer filling layer (808).

[0032] Finally, install a high-strength explosion-proof power supply manhole cover with an IP68 protection rating.

[0033] Operational testing and results: The system was put into operation, and the UPS host continuously participated in the voltage stabilization and filtering power supply of the underground auxiliary equipment. Test results: When simulating a power grid failure, the system automatically switched to battery emergency power supply within 10 milliseconds, and the ventilation load (701) and lighting load (702, 703) operated without interruption.

[0034] The installation area was continuously submerged in water for 72 hours. The equipment operating parameters were normal and there was no water leakage from the protective body.

[0035] The simulation of the cable being stretched by a collapsing roof was shown. The S-shaped redundant layout effectively released the stress, and the cable did not break, ensuring a continuous and stable power supply.

[0036] This embodiment demonstrates that the system and process completely solve the problems of poor environmental adaptability and easy failure during disasters in traditional emergency power supplies, achieving the design goals and providing a reliable emergency power supply solution for mines with similar conditions.

[0037] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A surface emergency UPS power supply system for mines that is resistant to collapse, water permeability, and power outages, characterized in that: include: The system includes a ground-based explosion-proof central control power cabinet, an input power supply unit, an emergency power supply unit, an energy storage unit, an output power supply unit, a fully sealed emergency junction box buried under a manhole cover, and a load unit. The input power supply unit includes one main input cable and at least one backup input cable. The emergency power supply unit includes at least two parallel-connected emergency UPS power supply devices. The energy storage unit includes at least two parallel-connected main energy storage battery packs, electrically connected to the emergency UPS power supply devices. The output power supply unit includes one output power supply cable and at least one backup output cable. The load unit is connected to the... The power supply unit includes an explosion-proof ground control cabinet that integrates a fully automatic switching module for daily and emergency power supply. The emergency UPS power supply equipment, main energy storage battery pack, and all power cables are housed within a protective structure below ground level, forming a fully buried installation. The protective structure includes: a large-pore mesh reinforced concrete structure on which the emergency UPS power supply equipment and main energy storage battery pack are mounted; a multi-layer composite sealant protective body encasing the emergency UPS power supply equipment and main energy storage battery pack; and a landfill layer filling and covering the multi-layer composite sealant protective body.

2. The system according to claim 1, characterized in that, The multi-layer composite sealant protective body comprises, from the inside out: a base sealing and bonding layer; a corrosion-resistant protective layer; a buffer and energy-absorbing layer; and an outer anti-extrusion, water-permeable, and breathable layer.

3. The system according to claim 2, characterized in that, The thickness of the base sealing and bonding layer is 2-4cm; the thickness of the corrosion-resistant protective layer is 4-6cm; the thickness of the buffer energy-absorbing layer is 6-8cm; and the thickness of the outer anti-compression, water-permeable and air-permeable layer is 4-6cm.

4. The system according to claim 1, characterized in that, The pore size of the large-pore mesh reinforced concrete structure is 80-150mm, and the porosity is 18%-25%.

5. The system according to claim 1, characterized in that, The routing paths of the input backup cable and the output backup cable are S-shaped and meander, with a routing length greater than the theoretical straight path length.

6. The system according to any one of claims 1-5, characterized in that, The load unit includes at least a mine explosion-proof ventilation load and a mine explosion-proof lighting load.

7. The system according to any one of claims 1-6, characterized in that, The system also integrates a fault self-diagnosis and load monitoring module.

8. A construction process for building an anti-collapse, water-permeable, and power-out-proof emergency UPS power supply system for mine surfaces as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Construction Preparation: Conduct geological surveys to determine the system layout location and parameters; S2. Structural Construction: Excavate the foundation pit to form a large-pore mesh reinforced concrete structure; S3. Equipment Installation and Multi-Layer Sealing: Install the emergency UPS power supply equipment and main energy storage battery pack on the structure, and form a composite sealant protective body to wrap the equipment; S4. Redundant cable layout: The main power supply cable, input backup cable, output power supply cable, and output backup cable are laid in an S-shaped detour; S5. Outer layer backfilling: Backfilling and compaction are carried out around the protective body; S6. Manhole cover installation: Power access manhole cover is installed; S7. System debugging.

9. The construction process according to claim 8, characterized in that, In step S3, the specific steps for forming the composite sealant protective body include: sequentially pouring and curing the base sealing adhesive layer, the corrosion-resistant protective layer, the buffer energy-absorbing layer, and the outer anti-compression water-permeable and breathable layer.

10. The construction process according to claim 8 or 9, characterized in that, In step S5, the landfill uses a mixture of fine sand and gravel, and the compaction degree after landfilling is not less than 93%.

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