coal mining high pressure water

  • Excavation of coal using a high pressure water jet system

    Experiments are described which investigate the potential of high-pressure water jets to act as the cutting unit for a longwall mining machine. The results of the experimentation showed that at lower pressure, larger diameter jet was more effective than the converse, and that the faster the jet was traversed, the more efficiently it mined coal.

  • NIOSHTIC-2 Publications Search 10000255 Coal Mining

    Abstract The objective of this research (Contract No. H0111789) was to determine the engineering feasibility of high-pressure water-jet coal mining and the degree of dust and noise health hazard associated with this mining technique. A portable water-jet device suitable for field use was designed, fabricated, and tested.

  • US4265487A High pressure water jet mining machine

    The high pressure water jet mining machine of the present invention has demonstrated the feasibility of mining coal using a combination of high pressure water jets as cutting tools and mechanical.

  • Cited by: 7
  • The Application of Water Jets in Coal Mining

    design of a longwall water jet mining ma­ chine. The results of this study indi­ cated that, for a given horsepower, coal would be mined more effectively with a lower pressure, larger diameter water jet than with an ultra high pressure, small diameter jet. The results can be illustrated with refer­ ence to two curves which were derived from

  • Author: David A. Summers and Adel H. Eltimsahy
  • Excavation of coal using a high pressure water jet system

    A high pressure water jet mining machine for the longwall mining of coal is described. The machine is generally in the shape of a plowshare and is advanced in the direction in which the coal is cut. The machine has mounted thereon a plurality of nozzle modules each containing a high pressure water jet nozzle disposed to oscillate in a

  • NIOSHTIC-2 Publications Search 10000255 Coal Mining

    The objective of this research (Contract No. H0111789) was to determine the engineering feasibility of high-pressure water-jet coal mining and the degree of dust and noise health hazard associated with this mining technique. A portable water-jet device suitable for field use was designed, fabricated, and tested. The results indicated that with a hydraulic jet operating at 50,000 and 100,000 psi,

  • (PDF) Hydro Jet System for Coal Mining

    Nov 19, 2010· High Pr essure Water Jet for mining o f co al. High Pressure Water Jet mining is a process using water, and so metimes an abrasive, which

  • Research on One Borehole Hydraulic Coal Mining System

    Jul 01, 2008· The Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using high-pressure water jet. Then the mixture of coal and water as slurry are driven out of the borehole by hydraulic or air-lifting method, and are separated at the surface.

  • Theory and Technology System of Green Coal Mining for

    Abstract: Hanxing mine areas are famous with high confined pressure groundwater in Ordovician limestone in China. With the increase of mining depth and intensity, especially into the subjacent coal mining, mining environment becomes increasingly complex, water pressure, ground stresses and ground temperature grow continually, threats from

  • Mine Services Water Introduction underground COAL

    Water. Large quantities of water are used in mining operations for cooling machinery, dust suppression, cleaning, fire-fighting and drinking. Water supplies are normally carried in steel pipes from surface to points close to the work places, with flexible hoses used for the final connections.

  • 7 Different Types of Mining Processes NewsMag Online

    Mar 12, 2020· 7. Hydraulic mining. Hydraulic mining uses water to break the ore away and carry it to the surface. In underground mining, one of the most difficult problems to solve is how to get the coal back up to the surface. With hydraulic coal mining, water is pushed at high pressure against the ore’s surface, breaking away the chunks bit by bit.

  • CN112390460A Underground effective space sealing and

    The conventional treatment process of the high-salinity wastewater of the coal mine is to desalt the high-salinity wastewater, clear water is produced after treatment for recycling or reuse, and strong brine with higher TDS is produced at the same time, the strong brine needs to be treated, otherwise, the problem of secondary pollution is caused, wherein salt separation crystallization is an

  • Alberta’s plan to free up water for coal mines raises

    Feb 01, 2021· Alberta’s ‘back door’ plan to free up billions of litres of water for coal mines raises alarm. Ranchers fear contamination of water if coal mining plans go ahead. Photo: Leah Hennel The Narwhal. Rachel Herbert is the fourth generation of her family to ranch

  • Alberta Beyond Coal Get a Lawn Sign & Help Protect our Water

    Jun 29, 2021· The Alberta government announced this step due to the high level of opposition by Albertans. This does not suspend coal mining projects in others areas, including Tent, Chinook or Grassy Mountain. Now is the time to increase pressure to permanently end all coal activity in the Rockies through letters, lawn signs, volunteering and speaking to friends, family and neighbours.

  • Effective Methane Extraction Radius after High-Pressure

    Aug 01, 2020· The effective radius of methane extraction after high-pressure water jet slotting is the most important parameter for borehole optimization and extraction time planning. We applied a steady flow model and thermal-hydrological-mechanical (THM) coupling model to calculate the effective radius after high-pressure water jet slotting. Field measurements at the Zhongliangshan coal mine show

  • Melting Glacier Floods Arctic Coal Mine, Highlighting

    Sep 18, 2020· For the past two decades, coal mining has been increasingly threatened by water intrusion from nearby melting glaciers and ice caps. In the days preceding the flooding of Gruve 7, a record temperature of 21.7 degrees Celsius had been recorded in Svalbard, causing sustained glacial melt and rivers to discharge four times their usual volume.

  • High Pressure Pumping System Designer and Integrator

    Hydrofinio is a hydraulic and pump system integrator and we work with multiples high-end partners and suppliers to provides engineered high pressure pumping system for different industries. Our products including underground long wall mining water and emulsion pump system, reverse osmosis pump system for desalination plant, ships and islands used.

  • Industrial Revolution Wikipedia

    The Industrial Revolution was the transition to new manufacturing processes in Europe and the United States, in the period from between 1760 to 1820 and 1840. This transition included going from hand production methods to machines, new chemical manufacturing and iron production processes, the increasing use of steam power and water power, the development of machine tools and the rise of the

  • NIOSHTIC-2 Publications Search 10000255 Coal Mining

    The objective of this research (Contract No. H0111789) was to determine the engineering feasibility of high-pressure water-jet coal mining and the degree of dust and noise health hazard associated with this mining technique. A portable water-jet device suitable for field use was designed, fabricated, and tested. The results indicated that with a hydraulic jet operating at 50,000 and 100,000 psi,

  • Application of high-pressure water jet technology and the

    Sep 01, 2016· By the end of December 2012, a total of 16 group high-pressure water jet drillings finished, and each group contained two high-pressure water jet drillings. Using the SOS micro-seismic monitoring system of Yanbei Coal Mine analyzed the energy events greater than or equal 10 3 J in the haulage gate of 250203 working face, and filtered out the

  • High pressure water jet cutting of rock

    hydrocarbon "Gilsonite" at Bonanza, Utah, by hydraulic mining. Water jet mining was used because Gilsonite is highly explosive in dust form and the naturally occurring spray from the water jets virtually eliminated the dust (5). In 1959, the U.S. Bureau of Mines began to investigate the use of water jets in coal

  • Mining Hauhinco Maschinenfabrik

    High pressure and water spray pump stations for longwall mining. A reputable supplier in coal mining for more than 111 years. Since its founding more than 100 years ago, Hauhinco has been closely linked with underground coal mining. With our water hydraulic competence we design individually tailored pump stations for underground mines.

  • Theory and Technology System of Green Coal Mining for

    Abstract: Hanxing mine areas are famous with high confined pressure groundwater in Ordovician limestone in China. With the increase of mining depth and intensity, especially into the subjacent coal mining, mining environment becomes increasingly complex, water pressure, ground stresses and ground temperature grow continually, threats from

  • Characteristic of water chemistry and hydrodynamics of

    Mar 15, 2013· The mining depth of main coal mines could reach around 600 m in eastern North China, and extends to the dept with speed of around 12 m/a. As the basement of eastern North China-type coal mine, the Ordovician karst aquifer is the main water source that influences the carboniferous coal seam mining. As the deep karst water has large buried depth and high water pressure (8–12 MPa),

  • Mine Services Water Introduction underground COAL

    Water. Large quantities of water are used in mining operations for cooling machinery, dust suppression, cleaning, fire-fighting and drinking. Water supplies are normally carried in steel pipes from surface to points close to the work places, with flexible hoses used for the final connections.

  • IMPACT OF COAL MINING ON WATER QUALITY

    The samples are collected from two different coal mining regions, IB Valley and Talcher area, of the state of Odisha. The analysis was carried out to find the effect, coal mining activities were having on the water quality of the mines. The purpose was also to compare the effects on the water quality of the two different mines from different

  • Study on control water of Ordovician aquifer: a coal mine

    May 12, 2020· Water-inrush accidents often occur when coal seams are mined with thin water-resisting layer and high confined water. To prevent water-inrush from coal seam floor, based on the analysis of the characteristics of Ordovician limestone (OLS) karst in Feicheng mining area, a series of key technologies or methods for OLS aquifer were studied in this paper.

  • Coal National Geographic Society

    Coal mining can impact local water supplies in several ways. Streams may be blocked, increasing the chances for flooding. Toxins often leach into groundwater, streams, and aquifers. Coal is one of the most controversial energy sources in the world. The advantages of coal mining

  • Coal Mining High Pressure Water greenrevolution.in

    A water jet assisted drum-type miner for mining coal or other mineral deposits comprisingThe mechanical cutting capabilities of drum-type continuous miners, used for mining coal and other minerals, can be supplemented by the inclusion of high- pressure water jets.

  • Study on Broken Floor Rock Mass by Mining Underground Pressure

    As the mining depth of North China-type coal fields increases year by year, the threat of Ordovician limestone karst water damage to coal seam mining is increasing, and the risk of floor water

  • CN112390460A Underground effective space sealing and

    The conventional treatment process of the high-salinity wastewater of the coal mine is to desalt the high-salinity wastewater, clear water is produced after treatment for recycling or reuse, and strong brine with higher TDS is produced at the same time, the strong brine needs to be treated, otherwise, the problem of secondary pollution is caused, wherein salt separation crystallization is an

  • Underground Coal Mining Methods to Abate Water Pollution

    ----- Underground Coal Mining Methods to Abate Water Pollution: A State of the Art Literature Review Coal Research Bureau West Virginia University Morgantown, West Virginia 26506 for the ENVIRONMENTAL PROTECTION AGENCY Project No. 14010 FKK December 1970 For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402 Price 60