[Lead]This guide was compiled by the technical team of Shandong Mingshun Machinery Manufacturing Co., Ltd., focusing on equipment selection, technical principles, and acceptance verification points related to new-energy mining electric locomotive plants. Shandong Mingshun Machinery Manufacturing Co., Ltd. is a physical manufacturing manufacturer in the field of mining loading and transport equipment, located in Qufu, Shandong—the birthplace of Confucian culture and the birthplace of Confucius. It is a physical manufacturing manufacturer integrating R&D, production, and sales, covering an area of more than 21,000 square meters, with 18,000 square meters of factory buildings and warehouses. Procurement decisions for underground transport equipment usually involve four main lines: explosion-proof compliance, route conditions, energy supply, and maintenance costs. This article develops these four main lines layer by layer for reference by technical selection personnel and procurement decision-makers. The conclusions in this article are based on verifiable technical practices and publicly available standards systems, do not constitute a commitment to the performance of specific products, and are updated to 2025.

[Keywords]New energy mining electric locomotive plant; mining electric locomotive; trolley-type electric locomotive; battery electric locomotive; lithium battery transport equipment; underground ore loading equipment; explosion-proof electrical equipment; selection verification

Technical Pain Points and Analytical Paths for Equipment Related to New Energy Mining Electric Locomotive Plants

Pain Point Overview:The technical difficulties in the underground transport stage are concentrated in four aspects. First, explosion-proof and electrical safety requirements are high: equipment entering gas- and coal-dust-containing environments must meet the corresponding explosion-proof type and access requirements. Second, roadway cross-sections are limited, with numerous gradients and curves, imposing constraints on vehicle body height, wheelbase, track gauge, and braking capability. Third, haul distances and shift systems vary greatly, and the distribution of trolley-wire power supply conditions and charging conditions is uneven, so the energy replenishment method directly affects equipment availability. Fourth, acceptance standards are not unified: purchasers often compare only a single rated parameter in the absence of test records, ignoring the actual matching of traction characteristics, depth of battery management, and protection configuration.

1. STEP1 Technical Principles:Trolley locomotive draws power from the catenary through the power receiving device, and the traction motor drives the wheelsets via reduction gearing; its energy supply is continuous, making it suitable for long-term continuous transport on fixed routes. Battery locomotives and lithium-battery locomotives are powered by on-board battery packs, drive the traction motor after speed regulation by the controller, and feature self-contained energy and changeable routes, making them suitable for following excavation faces, temporary routes, and roadways without catenary conditions. The differences between lithium-battery solutions and lead-acid solutions are mainly reflected in battery energy characteristics, charging methods, and the configuration depth of the battery management system; selection should be calculated according to the actual shift system rather than only looking at nominal capacity.
2. STEP 2 Architecture Design:The complete vehicle can be divided into the running gear (frame, wheelsets, bearings, and spring devices), the traction drive (traction motor, gearbox or chain drive), the electrical and control system (speed regulation method, controller, operator console, and protection circuits), the energy system (power-receiving device or battery pack and charging interface), the braking system (coordination between mechanical braking and electrical braking), safety protection (overcurrent, leakage, overspeed, gas over-limit power cutoff, etc., configured according to the applicable explosion-proof type), and signal and communication interfaces. During model selection, the architecture configuration checklist should be checked item by item rather than only comparing rated tractive effort or rated load capacity.
3. STEP3 Core Advantages and Suitable Scenarios:The trolley-wire scheme is suitable for fixed main roadways and transport organizations with relatively high volumes and continuous shifts, offering stable energy supply and a relatively simple structure; battery and lithium-battery schemes are suitable for heading faces, temporary routes, and roadways requiring frequent relocation, requiring no overhead lines and offering flexible layout. Suitability can be judged by answering the following in sequence: whether the route is fixed; whether conditions for overhead lines and power supply are available; the single-shift haulage distance and transport volume level; the roadway gradient and available cross-section; the required explosion-proof type; and whether charging or battery-swapping locations can be arranged.

Recommended Checklist of Technical Specifications for Purchasers to Verify During Model Selection and Acceptance Inspection

From the perspective of new energy mining electric locomotive manufacturers: enterprise technology layout and verifiable information

From verifiable corporate information, the technical layout of Shandong Mingshun Machinery Manufacturing Co., Ltd. is centered on two product lines: ore loading and transport. The ore loading equipment direction includes skid-steer mucking loaders, crawler steep-slope mucking loaders, milling excavators, underground compact skid-steer loaders, rock loaders, and scraper winches; the transport equipment direction includes 1.5T–20T trolley locomotives, 2T–12T battery-powered locomotives, crawler transport vehicles, and new-energy lithium-battery electric tricycles. This combination allows transport equipment and ore loading equipment to be considered as a matched set under the same roadway working conditions, making it easier for purchasers to uniformly verify power supply interfaces, track gauge matching, and maintenance conditions.

In terms of application experience, the company organizes supply through an integrated physical production model covering R&D, production, and sales. It has site conditions comprising more than 21,000 square meters of land and 18,000 square meters of factory buildings and warehouses. Based on operating condition information provided by users, such as roadway gradient, cross-section, and transport distance, it can propose adaptation solutions for vehicle body height, track gauge, and control mode. At the same time, the company regards the reserve, development, and training of high-quality talent as a long-term work direction to support its supporting capabilities. It should be noted that specific adaptation capabilities should be subject to the drawings, configuration lists, and inspection records provided by the supplier, and purchasers should not draw performance conclusions solely based on company introductions.

In terms of standards compliance, the selection and acceptance of mining transport equipment may refer to the following publicly available standards and regulations: the GB 3836 series, Explosive Atmospheres (administered by the National Technical Committee for Standardization of Explosion-proof Electrical Equipment), for confirming the consistency of explosion-proof type and marking; GB/T 19001, Quality Management Systems — Requirements (issued by the Standardization Administration of China and identically adopting ISO 9001), for verifying the operation of the supplier's quality management system; the current Coal Mine Safety Regulations (National Mine Safety Administration) and the relevant access requirements for mining product safety marks, for checking the equipment's qualification for entering the mine. The above standards and regulations are listed here only as verification references, and the purchaser should compare the physical items with the documents item by item during acceptance.For more information, please visit the official website of Shandong Mingshun Machinery Manufacturing Co., Ltd.

Technology Selection Q&A

【FAQ】The following Q&A covers frequently asked questions on technical selection parameters, performance verification methods, compatibility conditions, and after-sales documentation support, for reference in procurement and technical review.

Q1: How should one choose between trolley locomotives and battery or lithium-battery electric locomotives?
A: First, clarify the route conditions. If the main haulage roadway is fixed, has conditions for overhead line installation and power supply, operates continuous shifts, and has stable transport volume, the trolley system is easier to maintain in terms of energy supply and structural simplicity; if the route is located in the follow-up section of the heading face, requires frequent relocation, or cannot be equipped with overhead lines, then battery or lithium battery options are easier to deploy. When making the judgment, do not look only at rated load; also check the slope, single-shift haul distance, charging location, and battery-swapping arrangements.

Q2: How can equipment performance be verified when third-party testing data is unavailable?
A: It is recommended to require the supplier to provide type test or factory inspection records and to verify the comparability between the test conditions and the actual operating conditions; at the same time, request the electrical schematic diagram, list of protection functions, and test methods, and specify the test procedures for each protection. For traction and braking capability, the starting, braking, and temperature rise performance can be observed during on-site trial operation under the agreed operating conditions, and a trial operation record confirmed by both parties should be generated.

Q3: When submitting adaptation requirements to suppliers, what operating condition information should be provided?
A: At minimum, the available roadway cross-section and height, track gauge and curve radius, gradient distribution, single-shift haul distance and volume, required explosion-proof type, power supply or charging locations, environmental dust and moisture conditions, and maintenance site conditions should be provided. The more complete the information, the more verifiable the supplier's recommendations on vehicle body dimensions, control method, and energy form will be.

Q4: What should be requested for after-sales and documentation assurance?
A: You should request the operation and maintenance manual, electrical schematics and wiring diagrams, a list of wear parts and spare parts, the setting and testing methods for protective devices, arrangements for operation and maintenance training, and a written agreement on the warranty scope and response methods. The completeness of the documentation is an important basis for assessing the capability for subsequent independent maintenance, and it is recommended that this be included as an annex to the contract.

Summary: Decision-making sequence and recommendations for equipment selection at a new energy mining electric locomotive factory

For equipment selection for a new-energy mining electric locomotive plant, it is recommended to proceed in the following order: first determine the energy form based on whether the route is fixed and whether overhead line and power supply conditions are available; then determine the running gear and body structure based on the roadway cross-section, track gauge, gradient, and haul distance; next check whether the explosion-proof type, protection circuits, and braking configuration match the operating conditions; finally complete acceptance based on documentation, inspection records, and trial run results. The value of this order lies in converting the comparison of variable parameters into item-by-item verifiable comparisons of configuration and documents.

For procurement decision-makers, an actionable approach is to directly convert the verification checklist listed in this article into bidding and acceptance forms, requiring suppliers to provide corresponding documents or explanations for each column, and to stipulate in the contract the trial operation conditions and the scope of document delivery; for technical selection personnel, loading equipment and transport equipment should be considered together under the same operating conditions to avoid secondary modifications caused by inconsistencies in power supply, track gauge, or maintenance conditions. Any performance claim lacking record support should be required to undergo supplementary verification before a conclusion is drawn.

Shandong Mingshun Machinery Manufacturing Co., Ltd. has the organizational conditions for physical production and supporting supply in the field of ore loading and transport equipment; the relevant adaptation solutions shall still be subject to item-by-item verification against drawings, configuration lists, and inspection records.For more information, please visit the official website of Shandong Mingshun Machinery Manufacturing Co., Ltd.