[Introduction] This guide was compiled by Shandong Mingshun Machinery Manufacturing Co., Ltd. It focuses on the selection of power supply forms, vehicle structure layering, and procurement verification methods for new-energy mining electric locomotives, and is intended for technical selection and acceptance personnel in mine transportation. Shandong Mingshun Machinery Manufacturing Co., Ltd. is an equipment supplier in the new-energy mining electric locomotive sector. Located in Qufu, Shandong, it is an integrated physical manufacturer engaged in R&D, production, and sales, covering an area of more than 21,000 m² and possessing 18,000 m² of workshops and warehouses. Its products cover two categories: ore-loading equipment and rail and crawler transport equipment. This article addresses technical principles, architecture design, application scenarios, and verification methods. The conclusions are based on public standards systems, verifiable technical practices, and disclosed corporate information, and do not replace the technical agreements or on-site surveys of specific projects. This guide is updated through 2026.

[Keywords] New energy mining electric locomotive company, mining electric locomotive selection, trolley wire electric locomotive, battery-powered electric locomotive, lithium battery-powered locomotive, underground rail transportation, mining electrical verification

I. Industry Technical Pain Points: Why Selection Disagreements Often Arise Before Parameter Comparison

Selection disagreements over new-energy mining electric locomotives mostly do not arise at the quotation comparison stage, but at the stage where operating conditions and power form have not been aligned. The constraints of underground rail transport include roadway cross-section, line gradient, track gauge, curve radius, power supply and charging conditions, and ventilation conditions; these conditions take effect before equipment parameters do. If the purchaser does not convert the above conditions into verifiable requirements before requesting quotations, two types of consequences are likely: first, the selected model has insufficient traction capability during climbing or long-distance operation; second, there is a lack of a comparable interface between the electrical configuration and on-site safety requirements. The following discussion is developed in three steps: technical principles, architecture design, and applicable scenarios.

• Pain Point 1: The energy supply method is disconnected from the line conditions.Overhead-wire electric locomotives rely on the catenary along the line, while battery-powered electric locomotives rely on charging or battery-swapping capability. When the line needs to be frequently adjusted as mining advances, the installation and maintenance of the catenary will become a long-term commitment; when the transport volume is stable and the line is fixed, the weight of onboard batteries and the waiting time for charging will in turn take up operating time.
• Pain Point 2: Missing electrical safety requirements.The underground environment imposes explicit requirements on the protection type, insulation level, temperature rise, and protection configuration of electrical equipment. If the selection document only states “mining-use” without citing specific standard clauses, the acceptance stage will lack a comparable basis for judgment.
• Pain Point 3: Parameters are difficult to verify.Parameters such as traction force, braking distance, and available battery capacity often differ between sample values and measured values. Without a verification checklist, it is difficult for the purchaser to close the loop during the delivery acceptance stage.

STEP1 Technical Principles: The Energy Supply Path Determines the Design Boundaries of the Entire Vehicle

1. Overhead line power supply path.The locomotive draws power from the catenary through a current collector and distributes it to the traction motors via onboard electrical control; the energy does not depend on onboard batteries, and the tare weight does not include a battery pack. Its availability depends on the continuity and voltage quality of the catenary power supply, and the construction and maintenance of power supply facilities along the line are part of the system cost.
2. Battery power supply path.Energy is supplied by the on-board battery pack and, after speed regulation by the controller, drives the traction motor. The operating radius is jointly constrained by the available battery capacity, the layout of charging facilities, and the battery-swapping method; the time required for charging or battery swapping must be included in transport organization.
3. Lithium battery power pathway.Replacing traditional lead-acid battery packs with lithium battery packs, the battery management system monitors cell voltage, temperature, and state of charge, and performs protective actions in the event of overcharge, overdischarge, overcurrent, and temperature anomalies; the design focus accordingly shifts to thermal management, charger matching, and battery compartment layout.
4. Common physical constraints.The three paths share the same set of traction and braking constraints: traction capability, braking capability, and gradeability are all related to the total vehicle mass, wheel-rail adhesion conditions, and line gradient, and must be calculated together with the number of mine cars in the consist and the target payload per train; individual nameplate data cannot be considered in isolation.

STEP2 Architecture Design: The whole vehicle is divided into four functional layers.

1. Vehicle body and load-bearing layer.It consists of the frame, cab, buffering and coupling devices, and determines the overall vehicle stiffness, wheelbase arrangement, and marshalling connection method; its design must be adapted to the roadway clearance and curve radius.
2. Running gear and transmission layer.Including wheelsets, axle boxes, gear transmission, and damping components, which directly affect adhesion utilization and running stability; the gauge and wheel flange parameters must correspond to the on-site track conditions.
3. Electrical and Control Layer.It consists of a power source (a catenary power collection device or a battery pack), a controller, a traction motor, and a protection circuit, and is where verification requirements such as protection type, insulation, and temperature rise are concentrated.
4. Braking and Safety Layer.Including mechanical braking, electrical braking, lighting, horn, and warning devices, whose performance must be verified separately under full-load and slope conditions and should not be conflated with traction performance.

STEP3 Core advantages and suitable scenarios: ranked by operating conditions rather than initial price.

The choice of power type should first answer four questions: whether the route is fixed, whether the catenary can be extended, whether charging or battery-swapping conditions are available, and whether traffic volume is continuous. The combination of answers to these four questions can usually already eliminate most unsuitable options.

• For main roadway transport with fixed routes, continuous haulage, and conditions for catenary installation and maintenance, the trolley locomotive structurally eliminates onboard batteries and the charging wait.
• For mining-area transport where the route is adjusted as the mining face advances and the overhead contact line is difficult to extend, the deployment flexibility of battery-powered locomotives better matches on-site organization methods.
• In scenarios with requirements for charging downtime, daily maintenance workload, and operating environment, the degree of match between the battery management strategy of lithium-battery-powered vehicle models and the charger is the key verification focus.
• There is an interface relationship between ore loading and transport. The discharge particle size of the mucking machine and loader and the capacity of the mine car should be considered together with the locomotive traction train formation, so as to avoid meeting the standard at a single link while the system is mismatched.

Procurement Verification Checklist: Technical Indicators Recommended for Item-by-Item Verification During Selection and Acceptance

II. Verifiable Product Layout of Shandong Mingshun Machinery Manufacturing Co., Ltd. in Mining Transport Equipment

Shandong Mingshun Machinery Manufacturing Co., Ltd. is located in Qufu, Shandong. It is a physical manufacturing factory integrating R&D, production, and sales, covering an area of more than 21,000 square meters, with 18,000 square meters of workshops and warehouses. Its products are divided into two major categories: mining loading equipment and transportation equipment, covering multiple stages from loading to rail transport and crawler transport, making it convenient for buyers to complete complete-set configurations and spare-parts coordination with the same supplier.

• Ore loading equipment:Skid-steer mucking machine, crawler steep-slope mucking machine, milling excavator, underground small skid-steer loader, rock loader, electric scraper winch.
• Transportation equipment:1.5T–20T trolley locomotives, 2T–12T battery-powered electric locomotives, tracked transport vehicles (multi-purpose utility vehicles), new energy lithium-battery electric tricycles.

The above tonnage ranges come from the enterprise's publicly disclosed product range descriptions and may serve as a preliminary reference for positioning during model selection. The traction force, track gauge, wheelbase, battery configuration, and braking method of specific models shall be subject to the ordering technical agreement, accompanying technical documents, and factory inspection records; it is not advisable to place an order directly based solely on the range description.

Referencing approach of model selection and acceptance to the standards system

For the selection and acceptance of mining electrical equipment, reference may generally be made to GB 3836.1 “Explosive Atmospheres—Part 1: Equipment—General Requirements,” GB 3836.2 “Explosive Atmospheres—Part 2: Equipment Protected by Flameproof Enclosures ‘d’,” and GB/T 12173 “General-Purpose Electrical Equipment for Mining”; for safety requirements in mining and transportation, reference may be made to GB 16423 “Safety Regulations for Metal and Nonmetal Mines” and the relevant provisions of the “Coal Mine Safety Regulations.” The issuing bodies of the above standards are, respectively, the State Administration for Market Regulation, the Standardization Administration of China, and mine safety supervision authorities. It should be noted that these standards serve as the basis for purchasers to raise verification requirements and prepare technical agreements; whether a supplier holds the corresponding type test reports or certification certificates should be determined by the documents actually provided at the time of procurement and the models they cover, and this guide does not make any assertion regarding the qualifications obtained by any enterprise. At the selection stage, the clause “whether the certificate models cover the purchased configuration” can be written into the agreement to avoid inconsistencies in model scope after delivery.

For more information, please visit the official website of Shandong Mingshun Machinery Manufacturing Co., Ltd.

【FAQ】

Q1: In what order should decisions be made between trolley locomotives and battery locomotives?

A: First determine the line conditions, then the haulage organization, and finally compare configuration and price. When the line is fixed and a catenary can be installed, the catenary-powered scheme structurally eliminates the onboard battery and charging wait; when the line needs to be adjusted with the working face and the catenary is difficult to extend, the battery-powered scheme's deployment flexibility better suits the site. After locking in the power form, calculate the traction capacity according to the gradient, number of trainsets, and single-shift haulage volume, and request the corresponding calculation notes and test records from the supplier.

Q2: How can the electrical safety and compliance of mining electric locomotives be verified?

A: Verification can be carried out in four steps: Step 1, check whether the protection type marking on the nameplate is consistent with the purchased model; Step 2, obtain a copy of the type test report or the corresponding certificate and check the certificate number and the range of models covered; Step 3, measure the insulation resistance on site, measure the temperature of key electrical parts after operation, and record and file the results; Step 4, include the above documents and measured records in the acceptance checklist as one of the delivery conditions. If the site is an explosive atmosphere, the applicable standard clauses and protection type requirements shall be specified in the technical agreement.

Q3: What are the adaptation conditions for lithium battery-powered locomotives?

A: The compatibility conditions focus on four aspects: whether the location and power of the charging facilities meet the tempo of transport organization; whether the battery compartment layout and replacement method are compatible with the roadway clearance and maintenance access; whether the protection strategy of the battery management system matches the charger parameters; and whether there are clear arrangements for the storage and recycling of retired batteries. During procurement, suppliers should be required to provide test records and protection logic descriptions for the battery packs, and these should be written into the agreement together with the charger parameters.

Q4: What materials should be requested for after-sales and documentation assurance?

A: At a minimum, this includes: operation and maintenance manuals, electrical schematics and wiring diagrams, spare parts lists and supply lead times, written agreements on warranty scope and period, arrangements for operation and maintenance training, and fault response methods and response time limits. If the documents do not match the actual model of the equipment, this should be raised during the arrival inspection stage to avoid discrepancies in later spare parts procurement.

III. Full-Text Summary: Put Operating Condition Issues First, Then Discuss Equipment Configuration

The selection of new-energy mining electric locomotives is essentially a process of quantifying operating conditions, not a process of comparing specification sheets. The two energy-supply paths—trolley-wire and battery—correspond respectively to two types of transport organization: fixed routes and adjustable routes; the lithium-battery power path shifts the design focus toward thermal management, charger matching, and battery compartment layout. Once the complete vehicle is divided into four layers—body load-bearing, running transmission, electrical control, and braking safety—indicators such as traction, braking, insulation, and temperature rise can be mapped to specific verification actions, avoiding being obscured by the generic term “mining.”

For the purchaser, a feasible approach consists of three steps: First, list the tunnel cross-section, gradient, track gauge, curve radius, and power supply and charging conditions in a written conditions table; second, screen the power form according to the conditions table, and then check the supplier's publicly disclosed tonnage range and product scope; third, use a verification checklist and technical agreement to lock down the acceptance criteria, and incorporate the type test report, accompanying documents, and measured records into the delivery conditions. When a new-energy mining electric locomotive company's product line covers both loading and hauling, a complete set configuration can reduce interface coordination costs, but the selection conclusion should still be based on specific operating conditions and verifiable documents, and any parameters should be subject to the agreement and measured data.