A hydraulic prop is an efficient hydraulic support device used for underground coal mine support, primarily applied in mine roadways and coal mining working faces, especially suitable for comprehensive mining faces in thin and medium-thick coal seams. It can effectively control roof pressure, ensure miner safety, and improve coal mining efficiency.
The hydraulic prop series includes models such as DW External Type, Emulsion Pump Station, DN Internal Type, and Articulated Beam Top Type, each providing a tailored solution for various operational requirements and environmental conditions.
The DW hydraulic prop, used in conjunction with an emulsion pump station, is primarily employed for support in mine roadways and coal mining working faces, particularly suitable for fully mechanized mining faces in thin and medium-thick coal seams. It effectively controls roof pressure, ensuring miner safety and enhancing coal mining efficiency.
Lightweight and easy to move, suitable for underground operations.
Strong load-bearing capacity, reaching 300~500 kN, safe and reliable, with overpressure protection functionality.
Large working stroke, adaptable to roofs of varying heights, allowing real-time adjustments, flexible operation, and precise control of support force.
Made of high-quality materials, capable of withstanding the harsh working conditions of mining tunnels, ensuring long-term stability.
Recyclable and reusable, improving economic efficiency.
| Item | Max height（mm） | Min.Height（mm） | Working Stroke（mm） | Rated working resistance KN | Weight （Kg） | Rated working Pressure MPa | Hydraulic pump pressure MPa | Setting load KN | Cylinder Dia. （mm） | Emulsion Liquid |
| DW06-350/110X | 630 | 400 | 230 | 350 | 25 | 39.7 | 15-20 | 132-176 | 110 | Emulsion containing 1% to 2% M10 emulsified oil |
| DW08-350/110X | 800 | 490 | 310 | 350 | 28 | 39.7 | 15-20 | 132-176 | 110 | |
| DW10-350/110X | 1000 | 595 | 405 | 350 | 32 | 39.7 | 15-20 | 132-176 | 110 | |
| DW12-350/110X | 1200 | 700 | 500 | 350 | 36 | 39.7 | 15-20 | 132-176 | 110 | |
| DW14-350/110X | 1400 | 810 | 590 | 350 | 40 | 39.7 | 15-20 | 132-176 | 110 | |
| DW16-350/110X | 1600 | 920 | 680 | 350 | 44 | 39.7 | 15-20 | 132-176 | 110 | |
| DW18-350/110X | 1800 | 1035 | 765 | 350 | 48 | 39.7 | 15-20 | 132-176 | 110 | |
| DW20-350/110X | 2000 | 1150 | 850 | 350 | 52 | 39.7 | 15-20 | 132-176 | 110 | |
| DW22-350/110X | 2240 | 1280 | 960 | 350 | 56 | 39.7 | 15-20 | 132-176 | 110 | |
| DW25-350/110X | 2500 | 1430 | 1070 | 350 | 60 | 39.7 | 15-20 | 132-176 | 110 | |
| DW28-350/110X | 2800 | 1600 | 1200 | 350 | 66 | 39.7 | 15-20 | 132-176 | 110 | |
| DW31.5-350/110X | 3150 | 1780 | 1370 | 350 | 74 | 39.7 | 15-20 | 132-176 | 110 | |
| DW35-350/110X | 3500 | 1960 | 1540 | 350 | 82 | 39.7 | 15-20 | 132-176 | 110 | |
| DW38-250/110X | 3800 | 2163 | 1637 | 250 | 88 | 28.3 | 15-20 | 132-176 | 110 | |
| DW40-250/110X | 4000 | 2224 | 1780 | 250 | 96 | 28.3 | 15-20 | 132-176 | 110 | |
| DW42-250/110X | 4200 | 2330 | 1880 | 250 | 100 | 28.3 | 15-20 | 132-176 | 110 | |
| DW45-250/110X | 4500 | 2480 | 2020 | 250 | 110 | 28.3 | 15-20 | 132-176 | 110 |
| Item | Max height（mm） | Min.Height（mm） | Working Stroke（mm） | Rated working resistance KN | Weight （Kg） | Rated working Pressure MPa | Hydraulic pump pressure MPa | Setting load KN | Cylinder Dia. （mm） | Emulsion Liquid |
| DW06-300/100X | 630 | 400 | 230 | 300 | 21 | 34 | 15-20 | 108.5-144.7 | 100 | Emulsion containing 1% to 2% M10 emulsified oil |
| DW08-300/100X | 800 | 490 | 310 | 300 | 24 | 34 | 15-20 | 108.5-144.7 | 100 | |
| DW10-300/100X | 1000 | 595 | 405 | 300 | 27.5 | 34 | 15-20 | 108.5-144.7 | 100 | |
| DW12-300/100X | 1200 | 700 | 500 | 300 | 31.5 | 34 | 15-20 | 108.5-144.7 | 100 | |
| DW14-300/100X | 1400 | 810 | 590 | 300 | 34.5 | 34 | 15-20 | 108.5-144.7 | 100 | |
| DW16-300/100X | 1600 | 920 | 680 | 300 | 38 | 34 | 15-20 | 108.5-144.7 | 100 | |
| DW18-300/100X | 1800 | 1035 | 765 | 300 | 42 | 34 | 15-20 | 108.5-144.7 | 100 | |
| DW20-300/100X | 2000 | 1150 | 850 | 300 | 46.5 | 34 | 15-20 | 108.5-144.7 | 100 | |
| DW22-300/100X | 2240 | 1280 | 960 | 300 | 51 | 34 | 15-20 | 108.5-144.7 | 100 | |
| DW25-250/100X | 2500 | 1430 | 1070 | 250 | 56 | 28.3 | 15-20 | 108.5-144.7 | 100 | |
| DW28-250/100X | 2800 | 1600 | 1200 | 250 | 62 | 28.3 | 15-20 | 108.5-144.7 | 100 | |
| DW31.5-200/100X | 3150 | 1780 | 1370 | 200 | 69 | 27.6 | 15-20 | 108.5-144.7 | 100 | |
| DW35-200/100X | 3500 | 1960 | 1540 | 200 | 75 | 27.6 | 15-20 | 108.5-144.7 | 100 |
| Item | Max height（mm） | Min.Height（mm） | Working Stroke（mm） | Rated working resistance KN | Weight （Kg） | Rated working Pressure MPa | Hydraulic pump pressure MPa | Setting load KN | Cylinder Dia. （mm） | Emulsion Liquid |
| DW06-300/100 | 630 | 485 | 145 | 300 | 25.1 | 38.2 | 15-20 | 118-157 | 100 | Emulsion containing 1% to 2% M10 emulsified oil |
| DW08-300/100 | 800 | 578 | 222 | 300 | 26.2 | 38.2 | 15-20 | 118-157 | 100 | |
| DW10-300/100 | 1000 | 685 | 315 | 300 | 32 | 38.2 | 15-20 | 118-157 | 100 | |
| DW12-300/100 | 1200 | 792 | 408 | 300 | 36.3 | 38.2 | 15-20 | 118-157 | 100 | |
| DW14-300/100 | 1400 | 900 | 500 | 300 | 40 | 38.2 | 15-20 | 118-157 | 100 | |
| DW16-300/100 | 1600 | 1005 | 595 | 300 | 43.5 | 38.2 | 15-20 | 118-157 | 100 | |
| DW18-300/100 | 1800 | 1110 | 690 | 300 | 47 | 38.2 | 15-20 | 118-157 | 100 | |
| DW20-300/100 | 2000 | 1240 | 760 | 300 | 48 | 38.2 | 15-20 | 118-157 | 100 | |
| DW22-300/100 | 2240 | 1440 | 800 | 300 | 55 | 38.2 | 15-20 | 118-157 | 100 | |
| DW25-250/100 | 2500 | 1700 | 800 | 250 | 58 | 31.8 | 15-20 | 118-157 | 100 | |
| DW28-250/100 | 2800 | 2000 | 800 | 250 | 71.7 | 31.8 | 15-20 | 118-157 | 100 | |
| DW31.5-200/100 | 3150 | 2350 | 800 | 200 | 78 | 25.4 | 15-20 | 118-157 | 100 | |
| DW35-200/100 | 3500 | 2700 | 800 | 200 | 84.4 | 25.4 | 15-20 | 118-157 | 100 | |
| DW38-250/110 | 3800 | 2800 | 1000 | 250 | 92 | 26.3 | 15-20 | 147-190 | 110 | |
| DW40-250/110 | 4000 | 3000 | 1000 | 250 | 99 | 26.3 | 15-20 | 147-190 | 110 | |
| DW42-200/110 | 4200 | 3200 | 1000 | 200 | 106 | 21.1 | 15-20 | 147-190 | 110 | |
| DW45-200/110 | 4500 | 3500 | 1000 | 200 | 113 | 21.1 | 15-20 | 147-190 | 110 |
The emulsion pump station is a power device used to supply hydraulic supports in fully mechanized mining faces or single hydraulic props in conventional mining faces. It is also suitable as a power source for ground-based high-pressure water jet cleaning equipment and other hydraulic systems. It mainly consists of an emulsion tank, emulsion pump units (two sets), and a hydraulic control system.
The emulsion pump station can provide a stable high-pressure emulsion, meeting the operational needs of hydraulic props.
Due to the unique underground coal mine environment, the emulsion pump station typically employs explosion-proof motors and electrical components to ensure safe operation in flammable and explosive conditions.
Equipped with a high-efficiency filter, the emulsion pump station ensures the cleanliness of the emulsion, preventing impurities from entering the hydraulic system, thereby extending the service life of both the pump station and hydraulic props.
With a compact structure and easy installation, it can operate stably for extended periods in harsh environments, reducing failure rates. Beyond hydraulic prop systems in coal mines, it is also applicable to tunnel engineering, mining projects, and other scenarios requiring hydraulic power.
The emulsion pump station is designed rationally, with key components that are easy to disassemble and maintain. Regular maintenance and upkeep can prolong the equipment’s service life, ensuring efficient operation.
| Model | BRW40/20 | BRW80/20 | BRW80/31.5 |
| Rated flow(L/min) | 40 | 80 | 80 |
| Rated pressure(Mpa) | 20 | 20 | 31.5 |
| Rated power(KW) | 15 | 37 | 55 |
| Plunger diameter(mm) | 25 | 40 | 40 |
| Travel(mm) | 50 | 44 | 44 |
| Round trip | 547 | 535 | 535 |
| Plunger number | 3 | 3 | 3 |
| Overall dimensions(mm) | 1380*670*570 | 2200*840*855 | 2200*840*855 |
| Tank volume(L) | 640 | 640 | 640 |
| Model | BRW125/31.5 | BRW160/31.5 | BRW200/31.5 | BRW250/31.5 |
| Rated flow(L/min) | 125 | 160 | 200 | 250 |
| Rated pressure(Mpa) | 31.5 | 31.5 | 31.5 | 31.5 |
| Rated power(KW) | 75 | 110 | 125 | 160 |
| Plunger diameter(mm) | 40 | 45 | 40 | 40 |
| Travel(mm) | 66 | 66 | 62 | 66 |
| Round trip | 560 | 547 | 548 | 660 |
| Plunger number | 3 | 3 | 5 | 5 |
| Overall dimensions(mm) | 2100*850*1000 | 2400*905*1245 | 2400*960*1300 | 2400*960*1300 |
| Tank volume(L) | 1000 | 1500 | 1600 | 2000 |
| Model | BPW200/6.3-16 | BPW250/6.3-16 | BPW315/6.3 | BPW315/10-16 |
| Rated flow(L/min) | 200 | 250 | 315 | 315 |
| Rated pressure(Mpa) | 6.3 10.16 | 6.3 10.16 | 6.3 | 10.16 |
| Rated power(KW) | 37.55.75 | 37.55.75 | 45 | 75.110 |
| Plunger diameter(mm) | 54 | 68 | 66 | 40 |
| Travel(mm) | 56 | 56 | 63 | 62 |
| Round trip | 535 | 535 | 535 | 548 |
| Plunger number | 3 | 3 | 3 | 3 |
| Overall dimensions(mm) | 2750*1050*1250 | 2750*1050*1250 | 2940*1020*1270 | 2940*1020*1270 |
| Tank volume(L) | 2000 | 2000 | 2500 | 2500 |
| Model | BPW400/10-16 | BPW500/10-16 | BPW516/10-16 |
| Rated flow(L/min) | 400 | 500 | 515 |
| Rated pressure(Mpa) | 10、12.5、16 | 10、12.5、16 | 10、12.5、16 |
| Rated power(KW) | 90、110、125 | 110、125、160 | 110、125、160 |
| Plunger diameter(mm) | 56 | 63 | 64 |
| Travel(mm) | 62 | 62 | 68 |
| Round trip | 551 | 551 | 660 |
| Plunger number | 5 | 5 | 5 |
| Overall dimensions(mm) | 2840*1020*1270 | 3000*1100*1350 | 3000*1100*1350 |
| Tank volume(L) | 2500 | 3000 | 3000 |
Comparison of DN Internal Injection Props with DW Props: The DN internal injection prop is characterized by its integrated pump and oil reservoir. During setup, a hand crank enables rapid lifting, and when lowering, it does not discharge working fluid, effectively protecting the working environment. It is easy to use, flexible to manage, and simple to equip.
Features an internal hydraulic system for self-support, eliminating the need for external power. This reduces reliance on external fluid systems, improves sealing, and minimizes leakage risks. Ideal for power-limited or remote locations.
Supports manual or basic mechanical operation, making it user-friendly. Compact and lightweight, it’s easy to install, disassemble, and maintain.
Constructed with high-strength materials and a hydraulic system, it withstands significant pressure, ensuring stable support. Includes overload protection for enhanced safety and durability.
The hydraulic system allows flexible height adjustments, suitable for varying coal seam thicknesses and complex geological conditions.
Compact and easy to transport, it requires no external power, reducing energy use and environmental impact.
| Unit | DN06 | DN08 | DN10 | DN12 | DN14 | DN16 | DN18 | DN20 | DN22 | DN25 | DN28 | DN31.5 | DN35 | DN35 | DN38 | DN40 | DN42 | DN45 |
| Max Height mm | 650±10 | 800±10 | 1000±10 | 1200±10 | 1400±20 | 1600±20 | 1800±20 | 2000 | 2240 | 2500 | 2800 | 3150 | 3500 | 3500 | 3800 | 4000 | 4200 | 4500 |
| Min Height mm | 510 | 590 | 700 | 850 | 1000 | 1100 | 1200 | 1390 | 1540 | 1800 | 2100 | 2450 | 2800 | 2800 | 3100 | 3300 | 3500 | 3800 |
| Working Limit mm | 140±10 | 210±10 | 300±10 | 350±20 | 400±20 | 500±20 | 600±20 | 610 | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 |
| Rated Working Resistance kN | 250 | 250 | 250 | 250 | 250 | 250 | 250 | 300 | 300 | 250 | 250 | 160 | 160 | 150 | 150 | 150 | 150 | 150 |
| Rated Working Pressure MPa | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 46.3 | 46.3 | 39.3 | 39.3 | 25.1 | 25.1 | 15.7 | 15.7 | 15.7 | 15.7 | 15.7 |
| Cylinder Inner Dia mm | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 90 | 90 | 90 | 90 | 90 | 90 | 110 | 110 | 110 | 110 | 110 |
| Initial Support kN | 49 | 49 | 49 | 49 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 | 68.7-78.5 |
| Base Area cm2 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 147 | 147 | 147 | 147 | 147 |
| Max. Torque On Handle N.m | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 | ＜200 |
| Increase Height per Handle Shake mm | ≥12 | ≥12 | ≥12 | ≥12 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 |
| Down Prop Seed mm/s | ＞20 | ＞20 | ＞20 | ＞20 | ＞30 | ＞30 | ＞30 | ＞30 | ＞30 | ＞30 | ＞30 | ＞30 | ＞30 | ＞30 | ＞30 | ＞30 | ＞30 | ＞30 |
| Working Medium | 5# hydraulic oil | |||||||||||||||||
| Weight kg | 23 | 26 | 29 | 34 | 38 | 41 | 45 | 55 | 60 | 68 | 74 | 78 | 86 | 91 | 95 | 99 | 113 | 119 |
| Applicable Coal Seam Thickness m | 0.6 | 0.7～0.8 | 0.9～1.0 | 1.1~1.2 | 1.3~1.4 | 1.4~1.6 | 1.5~1.8 | 1.6~2 | 1.8~2.2 | 2.1~2.5 | 2.4~2.8 | 2.75~3.15 | 3.15~3.5 | 3.15~3.5 | 3.3~3.8 | 3.5~4.0 | 3.7~4.2 | 4.0~4.5 |
A metal articulated roof beam is a support beam used in coal mine working faces, located above single hydraulic props and below the roof, to transmit roof pressure. It is a roof beam used for supporting the roof in coal mine working faces. The metal articulated roof beam can be paired with various types of single metal props to form a metal support frame, serving as a high-strength roof beam for coal mines in horizontal and gently inclined mining faces. It is installed at the top of single props, with beams hinged to each other, functioning as a load-bearing component for roof protection in the mining face.
The metal articulated roof beam consists of a beam body, joints, lugs, pins, and angle-adjusting wedges. Pins and wedges are used to achieve hinging between beams and cantilever support. The bottom plate of the beam body features a scalloped groove, facilitating the support of the roof cover at various positions on the beam body and preventing the props from slipping.
Designed to effectively handle environments with significant lateral pressures, making it ideal for tunnel construction projects.
Provides superior flexibility, allowing the prop to distribute forces more evenly across a wider area, reducing the risk of tunnel collapse.
The combination of the lateral load capacity and flexible beam design contributes to greater safety in high-pressure environments, preventing structural failure.
| Model | Center distance（mm） | Connect number of each time | Permissible bending distance （KN.m） | The Angle | Weight（㎏） | ||
| The beam body | Connection articulated | Upper, lower | Left, right | ||||
| DJB600/470 | 600 | 1-2 | 52.50 | 30.00 | ≥7° | ≥3° | 18.86 |
| DJB800/420 | 800 | 1-2 | 52.50 | 30.00 | ≥7° | ≥3° | 22.9 |
| DJB1000/300 | 1000 | 1-2 | 52.50 | 30.00 | ≥7° | ≥3° | 26.93 |
| DJB1200/300 | 1200 | 1-2 | 52.50 | 30.00 | ≥7° | ≥3° | 30.95 |
The hydraulic system automatically adjusts the pillar height to adapt to changes in geological conditions.
The hydraulic system provides strong support, ensuring safety in mining and tunnel construction.
High-quality sealing technology prevents leakage and contamination, extending the equipment's lifespan.
Multiple models and specifications are available for customers to choose from, with customization options for different hydraulic pillars based on specific needs.
Combination with U-shaped Steel Supports: Hydraulic pillars can be used in conjunction with U-shaped steel supports to provide a comprehensive support solution for tunnel and mine construction, ensuring optimal support performance.
Combination with Anchor Rod Systems: Hydraulic pillars can be paired with anchor bolt systems to create a robust support structure, enhancing construction safety.
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