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  • Coupling of stress and gas pressure in dual porosity ...

    Author: Yuexia Chen, Tingxiang Chu, Xuexi Chen, Peng Chen
  • Coupling of stress and gas pressure in dual porosity medium ...

    2020-4-6  Coupling of stress and gas pressure in dual porosity medium during coal seam mining Powder Technology ( IF 3.413) Pub Date : 2020-04-03, DOI: 10.1016/j.powtec Yuexia Chen; Tingxiang Chu; Xuexi Chen; Peng Chen

  • Coupling of stress and gas pressure in dual porosity ...

    In the process of coal seam mining, stress and gas pressure are two important parameters for the occurrence of gas disasters. Although many scholars have studied the parameters evolution during mining, the coupling of the parameters and the comparative analysis of gas pressures distributions in the matrix and fractures are rare.

  • Dual-subject interactive teaching of the course, Mining ...

    2016-1-1  Dual-subject interactive teaching of the course, Mining Pressure and Strata Control Qing Ye Weijun Wang . Hunan University of Science and Technology . Xiangtan, Hunan, People’s Republic of China . ABSTRACT: Mining Pressure and Strata Control is one of the core courses for the mining engineering major and the

  • Custom-built portable water solution for Mine All

    2020-6-14  A large mine in Northeast Queensland required potable water system to serve the mining village. Mining communities are developed around mines to sustain and house a mine’s workers: Due to the custom specification needed for the required portable water system, the client approached All-Pumps Sales Service for a complete solution.

  • High Pressure Mine Water Control Valves by Dual

    Hydromine Projects range of mine water control valves, isolation, shutdown valves and more with high pressures of up to 25MPa are designed for mine water reticulation, pressure and fluid control, pump stations, air cooling plants and energy recovery plants.

  • MINING HOSE FITTINGS ADAPTERS - ALFAGOMMA

    2018-6-22  1.2 Pressure: After determining the system pressure for a hydraulic system, hose selection must be made so that the recommended maximum operating pressure specified by a given hose, is equal or greater than the system pressure. Dynamic pressure is common for all hydraulic systems. Pressure surges which exceed the maximum working

  • MINE VENTILATION SYSTEMS

    1999-1-13  Mine Fan Main Levels R R D D 1 2 3 Figure 9-1. Basic ventilation system underground where D is a ventilation door or airlock, R is a mine regulator and 1, 2, 3 are working places with a surface exhaust fan. To maintain adequate ventilation through the life of a mine, careful advance ventilation planning is essential.

  • Pressure Control Valves Parker NA

      中文网页

    Parker's pressure control valves are designed to provide adjustable pressure control and limiting functions: we offer pressure relief, pressure reducing, sequence and unloading valves. As trusted pressure control valve manufacturer we supply into the major industrial markets all over the world. Our impressive range, which includes hydraulic pressure control valves in various designs as well as ...

  • TRUCK TIRE TYPES AND ROAD CONTACT PRESSURES by

    2010-11-16  pressure curve in this example exhibits a gradual rise and fall of contact pressures, the center region pressure curve exhibits a ... dual tire assembly with a single wide base tire. This offers a number of potential benefits affecting operating cost. It also results in the axle end load being transferred through a smaller contact area than ...

  • Pressure builds on Teck Resources to oust boss -

    Pressure builds on Teck Resources to oust boss ... Tribeca also said the Vancouver-based miner should oust Lindsay and scrap its dual-class shares to boost returns. ... The 2020 Metals and Mining ...

  • Mining centrifugal pump manufacturer, centrifugal

    2020-7-7  multi-stage heavy duty high pressure mining pumps DOVE range of multi-stage heavy duty centrifugal pumps are designed for Continuous, High-pressure water pumping applications. These sturdy, reliable pumps are produced in 9 models, with capacities ranging from 2,200 liter/min up to 5,000 liter/min, each pump size is available with either single ...

  • Komatsu showcases ZT44 DTH ... - International Mining

    2020-7-7  Engineered for the harshest places on earth, the ZT44 is ready for around-the-clock operations. Equipped with a dual-pressure air compressor enabling high- or low-pressure drilling, the machine can efficiently adjust to changing drilling conditions to still achieve optimal performance.” The ZT44 also has the largest compressor in its class.

  • Green coal mining technique integrating mining

    2017-1-1  After mining the Ji 14-31010 protective seam in the rock stratum, desorbed gas from the protected seam dissipates to the goaf of the protective seam through roof fractures. This dissipation leads to a sustained decrease in the gas pressure of the protected seam. The gas pressure of the Ji 15-31010 workface decreases by 80% from 1.78 to 0.35 MPa ...

  • Javelin Dual Variable Speed Pressure Booster Pump

    2020-7-7  Javelin Dual Variable Speed Pressure Pressure Boosters Javelin Pump systems cover a vast range of sizes and solutions from a small domestic mains water pressure booster system to a municipal multiple pump water supply system.

  • MINING HOSE FITTINGS ADAPTERS - ALFAGOMMA

    2018-6-22  1.2 Pressure: After determining the system pressure for a hydraulic system, hose selection must be made so that the recommended maximum operating pressure specified by a given hose, is equal or greater than the system pressure. Dynamic pressure is common for all hydraulic systems. Pressure surges which exceed the maximum working

  • Sandvik DR580 - Mining

    2020-7-5  Our Sandvik DR580 high-pressure, diesel-powered down-the-hole (DTH) drill comes equipped with the highest air pressure and volume rating of any boom DTH drill. This heavy-duty mining machine delivers maximum penetration rates and excels at high altitudes. It drills blast holes with a diameter of 115 to 216 millimeters (4 1/2 to 8 1/2 inches).

  • Tyre Gauges for Mining Construction Equipment

    Tyre Gauges for Mining Construction: Haltec products are designed to provide safe, efficient and accurate tyre inflation. Today, Haltec is recognised worldwide as the leading manufacturer of speciality tyre valve systems and pressure inflation hardware across Australia, Asia Pacific the Middle East..

  • Mechanical Pressure Switches – Barksdale Inc. (EN)

    Stripped Housed Bourdon Tube. B1S, B2S Series. High accuracy, stripped, up to 18,000 psi working pressure and 20,000 psi proof. B1T, B2T Series. High accuracy, housed with terminal strip, tamper-proof external adjustment, up to 18,000 psi and 24,000 psi proof

  • Dual Lances Telescoping Lances Zinc Plated Lances ...

    Although trigger guns are used in conjunction with these products, our high pressure lances are sold separately and come in a variety of forms. Dual, flexible, stainless steel, and telescoping lances are all for sale online with Power Wash Store.

  • Dual Pressure Gauge - Mechanical 60mm

    2020-6-6  Mining and Industrial Cockpit International Truck, Bus and Train Cockpit International Cockpit Digital Tachographs Senders, Switches,Transducers, Adapters Temperature Senders Switches ... Dual Pressure Gauge - Mechanical 60mm Price per Unit (piece): $179.30. Ask a question about this product

  • Javelin Dual Variable Speed Pressure Booster Pump

    2020-7-7  Javelin Dual Variable Speed Pressure Pressure Boosters Javelin Pump systems cover a vast range of sizes and solutions from a small domestic mains water pressure booster system to a municipal multiple pump water supply system.

  • Mining Equipment Filtration│Donaldson Engine

    2020-7-1  High performance filtration is the best preventive maintenance there is for hard-working equipment in the mining industry. ... High-pressure hydraulic assemblies and filters; High-performance DT hydraulic cartridges ... Clean Solutions Filter Manifolds expand capacity or increase flow rate beyond the capability of a single or dual filter head ...

  • Hydraulic fracturing with leakoff in a pressure

    Hydraulic fracturing with leakoff in a pressure-sensitive dual porosity medium. / Wang, Jiehao; Elsworth, Derek; Denison, Martin K. In: International Journal of Rock Mechanics and Mining Sciences, Vol. 107, 07.2018, p. 55-68. Research output: Contribution to journal › Article

  • Rosewill 8 GPU Mining Case Open Air Stackable

    Hot Deal: Rosewill 8 GPU Mining Case Open Air Stackable Frame, Dual PSU Support+FS $49.99. 1 minutes old 101 views ... MICHELANGELO 6 QT Pressure Cooker Air Fryer Combo, All-in-1 Pressure Cooker with Air Fryer - Two Lids for Pressure Cooker,Large Pressure

  • Mining Archives - OCV

    2020-7-10  Model 125-27P Booster Pump Control Valve Dual Chamber/Lift Check/High Pressure Model 126 Deep Well Pump Control Valve Pump Commander Aviation Fueling High Level Shut-Off Valves ... specifiers and operators rely on our mining control valves to perform consistently and efficiently in these often corrosive and typically difficult environments.

  • Dual Lances Telescoping Lances Zinc Plated Lances ...

    Although trigger guns are used in conjunction with these products, our high pressure lances are sold separately and come in a variety of forms. Dual, flexible, stainless steel, and telescoping lances are all for sale online with Power Wash Store.

  • Tyre Gauges for Mining Construction Equipment

    Tyre Gauges for Mining Construction: Haltec products are designed to provide safe, efficient and accurate tyre inflation. Today, Haltec is recognised worldwide as the leading manufacturer of speciality tyre valve systems and pressure inflation hardware across Australia, Asia Pacific the Middle East..

  • Metaris Aftermarket MHWFD Series Dual Pressure

    Metaris MHWFD Series Dual Pressure Dump Pumps Metaris Aftermarket Interchange Our Dual Pressure Dump Pumps come equipped with two relief pressures on them: high pressure (3000 psi) for Walking Floor ® applications and low pressure (2000 psi) for dump applications, each is selectable by a

  • Tank Level Sensors for Pressure Measurement TE

    2020-7-5  The pressure at the bottom of the tank or body of liquid is related to the height of the liquid. This level pressure is called hydrostatic pressure or head pressure. Typical units of measure for hydrostatic pressure are inches, feet, or meters of water column. 27.679 inches of water column (WC) is the approximate equivalent of 1 PSI at 100°F.

  • Tyre Gauges for Mining Construction Equipment

    Tyre Gauges for Mining Construction: Haltec products are designed to provide safe, efficient and accurate tyre inflation. Today, Haltec is recognised worldwide as the leading manufacturer of speciality tyre valve systems and pressure inflation hardware across Australia, Asia Pacific the Middle East..

  • Dual Pressure Gauge - Mechanical 60mm

    2020-6-6  Mining and Industrial Cockpit International Truck, Bus and Train Cockpit International Cockpit Digital Tachographs Senders, Switches,Transducers, Adapters Temperature Senders Switches ... Dual Pressure Gauge - Mechanical 60mm Price per Unit (piece): $179.30. Ask a question about this product

  • Mining Equipment Filtration│Donaldson Engine

    2020-7-1  High performance filtration is the best preventive maintenance there is for hard-working equipment in the mining industry. ... High-pressure hydraulic assemblies and filters; High-performance DT hydraulic cartridges ... Clean Solutions Filter Manifolds expand capacity or increase flow rate beyond the capability of a single or dual filter head ...

  • 0 to 40 bar/psi dual pressure gauge 4mm tube fitting

    0 to 40 bar/psi dual pressure gauge 4mm tube fitting. Brand: CSMI Product Code: 0-40 PrBa Availability: In Stock. ... Mining Shovel 0. Mobile cranes 0. Pickup Trucks 0. Ringer cranes 0. Trailer Dolly 0. Trailer Modules 0. Trailers ...

  • Drilling Mining Sullivan-Palatek

    DRILLING MINING The drilling and mining industries have one major factor in common: the need for compressed air. Whether you are operating sizeable air-powered drilling apparatus, heavy mining equipment deep underground or managing ventilation systems, dependable compressed air sources are vital. Our portable units offer a wide range

  • Mining Archives - OCV

    2020-7-10  Model 125-27P Booster Pump Control Valve Dual Chamber/Lift Check/High Pressure Model 126 Deep Well Pump Control Valve Pump Commander Aviation Fueling High Level Shut-Off Valves ... specifiers and operators rely on our mining control valves to perform consistently and efficiently in these often corrosive and typically difficult environments.

  • Cla-Val Pressure Reducing Valves for Mining

    Cla-Val Pacific manufactures a wide range of pressure reducing valves for Mining and Industrial applications. From basic PRVs to pressure reducing valves with additional functionality such a pressure sustaining, we have the pressure reducing valve you need

  • Metaris Aftermarket MHWFD Series Dual Pressure

    Metaris MHWFD Series Dual Pressure Dump Pumps Metaris Aftermarket Interchange Our Dual Pressure Dump Pumps come equipped with two relief pressures on them: high pressure (3000 psi) for Walking Floor ® applications and low pressure (2000 psi) for dump applications, each is selectable by a

  • Mining Excavator - Liebherr

    2019-7-30  The R 9800 is built to outperform all competitors in the Ultra class mining market. As a perfect loader for 240 t, 290 t and 360 t class mining trucks, the R 9800 is the right match for the Liebherr T 264 and T 284. Developed as the optimal loading tool for large scale mining operations, the R 9800 can achieve the most challenging targets.

  • Tank Level Sensors for Pressure Measurement TE

    2020-7-5  The pressure at the bottom of the tank or body of liquid is related to the height of the liquid. This level pressure is called hydrostatic pressure or head pressure. Typical units of measure for hydrostatic pressure are inches, feet, or meters of water column. 27.679 inches of water column (WC) is the approximate equivalent of 1 PSI at 100°F.