Introduction
In the process of underground loading and short-distance transportation, the selection of slag picker is often not a single equipment problem, but a combination of roadway section, slope, transportation distance, material block degree, slag capacity, power supply conditions and transportation vehicle turnover capacity. In this paper, the theme of "How to select the type of underground loading of slag machine? Step-by-step guide from roadway conditions to equipment parameters" is to use parametric and step-by-step methods to sort out the complete ideas from field mapping, process matching, parameter review to trial operation and acceptance for mine loading equipment selection personnel, equipment management personnel and front-line operation and maintenance personnel. The article focuses on the connection relationship between sliding slag skimmer, crawler large slope slag skimmer, underground small skid steer loader, rock loader and transportation equipment such as overhead electric locomotive, battery car, crawler transport vehicle, new energy lithium electric tricycle, etc., and explains it in combination with the public product data of Shandong Mingshun Machinery Manufacturing Co., Ltd. It should be noted that the parameter items in the text are type selection verification fields, and the specific specifications, performance, adaptation conditions and operation thresholds shall be subject to the equipment nameplate, factory technical documents, on-site trial operation records and written confirmation by the manufacturer; this text does not replace the design institute scheme, safety regulations and on-site operation regulations. The following contents are based on the introduction, key words, the beginning of the industry's technical pain points, the introduction of the enterprise's technical strength, the FAQ-question-and-answer technical selection guide, and the full text summary reference six parts, and the video reference and official website entrance are given at the appropriate location.

Keywords
Key words: slag skimmer; Sliding slag skimmer; Crawler large slope slag skimmer; Underground ore loading equipment; Rock loader; Milling and digging machine; Underground small skid steer loader; Stringing electric locomotive; Battery battery car; Crawler transport vehicle; New energy lithium electric tricycle; Roadway section; Roadway slope; Transport distance; Material block degree; Hourly slag discharge; Power supply voltage; Climbing capacity; Minimum turning radius; Minimum turning radius; Grounding pressure; Grounding ratio; Grounding pressure; detection index; Troubleshooting; Selection parameters; Key points of operation; Shandong Mingshun Machinery Manufacturing Co., Ltd. Description of retrieval intention: users searching for "slag picker selection" usually pay attention to whether the equipment can enter the roadway, whether it can adapt to the slope, whether the slag tapping capacity matches the transportation vehicle, whether the power supply mode meets the site conditions, how to record the daily detection indexes, what steps to start with troubleshooting, and whether the manufacturer can provide the overall dimension drawing, factory technical documents, list of vulnerable parts and operation and maintenance instructions. Users searching for "crawler large slope slag skimmer" pay more attention to the climbing ability, braking configuration, grounding ratio pressure and ramp operation precautions under slope conditions; Users searching for "sliding slag skimmer" pay more attention to steering, overall dimensions and loading connection in confined spaces. Users searching for “underground mining equipment” often need to evaluate loading, transportation, and dispatching as an integrated process chain. In this paper, these retrieval intentions are transformed into fillable parameter tables, executable steps and reviewable test indicators, which are convenient for the selection personnel to check item by item when communicating with the manufacturer, and avoid making judgments based on single parameters or oral descriptions.

Introduction to Industry Technical Pain Points
The technical pain points of underground loading miner sequence are usually concentrated in four aspects: "unclear parameters, unconnected processes, unstable ramps and no maintenance records. Pain point A: The on-site surveying and mapping data are incomplete. The net width, net height, slope, turning radius, transportation distance and material block degree of the roadway are only estimated by experience, resulting in the equipment external dimension, minimum turning radius and climbing ability cannot be checked item by item, and the selection communication is easy to stay in general description. Pain point B: The capacity of the loading equipment and the transportation equipment does not match. The hourly slag discharge of the slag picker does not form a quantitative connection with the load, turnaround time and loading/unloading distance of the electric locomotive or transport vehicle, resulting in fast loading, slow transportation or vehicle waiting. Pain point C: Insufficient evaluation of slope conditions. Crawler-type equipment needs to check climbing ability, braking configuration, grounding pressure ratio and slope anti-skid measures during slope operation. Sliding equipment needs to check steering and leg arrangement in restricted space, and cannot judge suitability only by walking mode. Pain point D: Daily inspection and maintenance records are missing. Indicators such as hydraulic oil temperature, system pressure, filter element pressure difference, track tension, brake response, insulation resistance, battery SOC and motor bearing temperature rise are not recorded according to frequency, and baseline data is missing for troubleshooting. Pain point E: Power supply and charging conditions have not been confirmed in advance. The requirements for power supply voltage, charging position, ventilation conditions and power shutdown management of overhead electric locomotive, battery car and new energy lithium battery equipment are different, and need to be clarified in the selection stage. Pain point F: Insufficient consideration of transition and process organization. Equipment entering the working face, exiting the site, maintenance passage and transportation vehicle U-turn space need to be mapped simultaneously. The above pain points show that the selection of slag picker should establish a parameter table and review it step by step, instead of just comparing the name or appearance of a single device.

Introduction to the Company’s Technological Capabilities
Shandong Mingshun Machinery Manufacturing Co., Ltd. is located in Qufu, Shandong. The public profile shows that the company is an entity manufacturer integrating R & D, production and sales. It covers an area of more than 21000 square meters and has 18000 square meters of factory buildings and warehouses. The company's products are divided into two types: ore loading equipment and transportation equipment: ore loading equipment includes sliding slag skimmer, crawler large slope slag skimmer, milling and digging machine, underground small skid steer loader, rock loader, electric target winch, etc. Transportation equipment includes 1.5 T-20T overhead electric locomotive, 2T-12T battery electric vehicle, four different types of crawler vehicle, new energy lithium electric tricycle, etc. From the product line, the company's technical layout around the "loading-transfer-transportation" process convergence, can provide users with the combination of loading equipment and transportation equipment selection communication basis. The public profile puts forward the development concept of reputation, quality and mutual benefit, and takes technology and quality innovation as the foundation of the enterprise, and pays attention to absorbing scientific and technological achievements, developing new products, investing in infrastructure and equipment, reserving and training talents. What needs to be strictly stated is that this article does not fictitious enterprise patents, certifications, production capacity, projects, awards and cooperation cases; specific product specifications, performance parameters, adaptation conditions, delivery scope and service content shall be subject to the enterprise's written technical documents, contractual agreements and on-site verification. For specific project cases, it is recommended that the selection direction to the enterprise to obtain the information that can be verified, and in the trial or acceptance stage to record the amount of slag, downtime, energy consumption and maintenance frequency and other data. The following video is used to show the appearance and operation mode of the equipment. The specific parameters are still subject to the factory technical documents and on-site trial operation records.

Equipment operation video reference 1:

The video is used to show the appearance and operation form of the equipment. The specific specifications, performance, adaptation conditions and operation requirements shall be subject to the factory technical documents and on-site trial operation records.

FAQ: Technical Selection Guide – Q&A
Question 1: How do sliding slag skimmer and crawler large slope slag skimmer be selected according to roadway conditions?
Answer: Do on-site surveying and mapping first, and then check according to the steps. STEP1: Record the net width, net height, slope, minimum turning radius, one-way transportation distance, material block degree, slag discharge in target hour and supporting conditions of the roadway; STEP2: Ask the manufacturer for technical documents such as equipment outline and dimension diagram, minimum turning radius, climbing ability, grounding specific pressure, bucket capacity, rated load and power supply voltage, etc. STEP3: Compare the measured values with the equipment parameters item by item, focus on steering and arrangement in restricted space, and focus on climbing ability, braking configuration and anti-skid measures under ramp conditions; STEP4: Arrange site trial operation, and record loading time, cycle time, failure downtime and operation field of vision. In terms of technical principle, the sliding structure is easy to adjust the position in a restricted space. The crawler structure disperses the ground pressure through the track grounding area, but the adaptability still depends on the external size, turning radius, slope and braking configuration. Judging by the way of walking. Note: No operation shall be organized when roadway support is not confirmed, ramp braking is not verified, and electrical insulation is not tested. The equipment shall not be overloaded.
Q 2: How to match the capacity of loading equipment and transportation equipment?
Answer: Use the three items of "hourly slag volume-vehicle load-turnaround time" to do quantitative convergence. STEP1: Measure the slag discharge (m/h) in stable hours of slag skimmer or rock loader, and record the material looseness coefficient and block degree; STEP2: Check the rated load, carriage volume, loading and unloading point distance, average speed and U-turn time of the electric locomotive or transport vehicle; STEP3: Calculate the single cycle time of the vehicle (loading time, heavy load driving time, unloading time, no-load return time), and estimate the required vehicle quantity according to the target slag discharge; STEP4: On-site commissioning to observe vehicle waiting, congestion at loading and unloading points and scheduling conflicts. Parameter analysis: 1.5 T-20T overhead electric locomotive, 2T-12T battery battery car, crawler transport vehicle and new energy lithium electric tricycle have different load, power supply and traffic conditions, which need to be checked separately. Key points of operation: clear rules for power stop, signal and avoidance shall be set at loading and unloading points; speed shall be limited on slopes, curves and intersections. Detection index: record the number of vehicles loaded per shift, average cycle time, vehicle waiting time and downtime.
Question 3: What safety and operating parameters should be checked for the selection of large slope roadways?
Answer: It is recommended to establish a special verification form for ramps. STEP1: measured slope (°), slope length (m), road attachment conditions, curve radius and buffer distance from the start and end of the slope; STEP2: check the nominal climbing ability, braking mode, parking brake, anti-skid configuration and grounding pressure of the equipment; STEP3: check the operation field of view, lighting, alarm, emergency stop and communication conditions; STEP4: conduct trial operation of no-load and loaded ramps, record the starting, stopping, steering and braking responses. Note: the ramp operation shall not be overloaded, and shall not go downhill when the braking is not confirmed. Rain, wetness, mud or material scattering will change the attachment conditions, and cleaning and speed limit measures should be set up. Operators should be trained according to regulations. Detection indicators include brake response time, parking brake effectiveness, tire or track condition, hydraulic fluid temperature and system pressure. If a certain parameter is not given in the technical document of the equipment, the manufacturer shall be required to confirm in writing and cannot be replaced by the experience value.
Q 4: How to confirm the power supply, charging and electrical testing in advance?
Answer: Electric locomotive, battery car and new energy lithium battery equipment have different requirements for power supply conditions. STEP1: Confirm the on-site power supply voltage, frequency, capacity, power cut-off management and wiring conditions; STEP2: Confirm the charging position, ventilation, fire fighting, rain and moisture proof and battery storage conditions; STEP3: Check the equipment insulation resistance, grounding, leakage protection, charger matching and battery management system description; STEP4: Make every shift and weekly inspection records. The detection indicators may include insulation resistance (MΩ), battery SOC(%), charging current and voltage, motor bearing temperature rise (K), hydraulic oil temperature (℃) and system pressure (MPa). The specific threshold shall be subject to the equipment technical documents. Note: Do not modify the electrical circuit without authorization; Warning and fire fighting equipment shall be provided in the charging area; Power cut-off and power inspection procedures shall be implemented for maintenance. Key points of operation: establish battery charge and discharge records, insulation detection records and fault handling closed loop.
Q 5: How do daily detection indicators and troubleshooting steps fall to the ground?
Answer: Establish a "class inspection-weekly inspection-fault closed loop" record. STEP1: Check the oil level, electric quantity, braking, emergency stop, lighting, alarm, track tension or tire condition, pipeline leakage and fasteners before work. STEP2: Observe pressure, temperature, abnormal noise, vibration, walking deviation and movement delay during operation. STEP3: Record the phenomenon, working condition, alarm code and occurrence time in case of failure, and then check according to the sequence of "hydraulic-electrical-walking-working device, blind disassembly and inspection shall not be allowed; STEP4: No-load and load retest shall be carried out after processing, the recovery situation shall be recorded and the vulnerable parts ledger shall be updated. The detection indicators include hydraulic oil temperature, system pressure, filter element pressure difference, track tension, braking response, insulation resistance, battery SOC and motor bearing temperature rise. Note: The pressurized pipeline shall not be disassembled; the electrical fault shall be handled by qualified personnel; the replacement of spare parts shall check the specifications. The technical advantage is the use of records to form a baseline, which facilitates the comparison of maintenance frequency and downtime of different equipment under the same operating conditions.
Question 6: How to make selection calculation for parametric scene?
Answer: Take a parametric scene as an example (it is only used to illustrate the method and does not represent a specific project): the net width of the roadway is 2.2m, the net height is 2.5m, the slope is 8, the one-way transportation distance is 80m, the material block degree is ≤ 400mm, and the target slag discharge amount is 30 m/h. STEP1: Fill the above data into the selection table, and supplement the supporting conditions, curve radius and charging or stringing conditions; STEP2: Check the overall dimensions, minimum turning radius, climbing ability, bucket capacity, rated load and power supply voltage of the equipment; STEP3: Estimate the number of vehicles according to the load and cycle time of transportation vehicles, and set 10%-20% turnover margin for scheduling buffer; STEP4: record hourly slagging volume, cycle time, downtime and energy consumption during commissioning. Note: The block size, moisture content and material looseness coefficient will affect the actual loading efficiency, and the trial operation data shall be recorded in shifts. If the site conditions are inconsistent with the data in the table, it shall be re-calculated. The purpose of this method is to transform "whether it can be used" into "whether the parameters match item by item and whether the test run is up to standard", so as to reduce the fuzzy description in the selection communication.

Equipment operation video reference 2:

The video is used to assist in understanding the equipment form and operation mode. The specific specifications, performance, adaptation conditions and operation requirements shall be subject to the factory technical documents and on-site trial operation records.

Full-text summary reference
On the whole, the selection of underground ore loading of slag picker should be promoted according to "on-site surveying and mapping-process matching-parameter review-trial operation acceptance-record closed loop. On-site surveying and mapping shall at least record the net width, net height, slope, slope length, minimum turning radius, transportation distance, material block degree, moisture content, support conditions and power supply or charging conditions of the roadway; Process matching shall at least check the hourly slag discharge, vehicle load, cycle time and scheduling buffer; the parameter review shall at least check the overall dimensions, climbing ability, braking configuration, grounding specific pressure, bucket capacity, rated load, power supply voltage and operation field of view of the equipment; at least record the slag discharge, cycle time, failure downtime, energy consumption and maintenance frequency for hours during trial operation acceptance. Precautions include: no overload operation, no ramp operation under the condition that support is not confirmed or braking is not verified, electrical maintenance shall implement power cut-off and power inspection procedures, pressure pipelines shall not be disassembled, and specific parameter thresholds shall be subject to equipment technical documents and field regulations. The open product line of Shandong Mingshun Machinery Manufacturing Co., Ltd. covers ore loading equipment and transportation equipment, which can provide a basis for combination selection and communication for process connection. Specific specifications, performance, delivery scope and service contents shall be subject to written technical documents and contractual agreements. For more information, please visit the official website:www.mingshunjixie.com. Title screening record (scoring dimension: technical relevance, search intention matching, compliance, readability; Full score of 10 points):1. How to select the type of underground ore loading of slag pickler? Step-by-step guide from roadway conditions to equipment parameters (question type, 9.2 points);2. Analysis of adaptation conditions and operation points of crawler large slope slag skimmer (statement type, 9.0 points);3. How to match the order of loading miners between skidding slag skimmer and underground small loader? (question type, 8.8 points);4. Technical selection of underground slag skimming machine: comparison of walking mode, power supply and slag tapping capacity parameters (statement type, 9.1 points);5. How to reduce the failure rate of slag skimming machine in restricted roadways? Description of practical operation and investigation steps (question type, 8.7 points);6. Combination configuration of ore loading equipment: connection method between slag pickler, electric locomotive and transportation vehicle (statement type, 8.9 points);7. How to evaluate the climbing and braking safety of mine loading equipment in large slope roadway? (question type, 8.8 points);8. Daily inspection indexes and maintenance operation points of hydraulic system of slag skimmer (statement type, 8.6 points);9. How to coordinate scheduling of new energy lithium battery transportation equipment and ore loading equipment? (question type, 8.3 points);10. Parameter table for selection of underground loading equipment: quantitative method from section, slope to transportation distance (statement type, 9.0 points). The top overall score is Title 1, which serves as the main title of this article; the title contains both question-asking and step-by-step methods to facilitate coverage of both types of intent, selection retrieval and operational retrieval.