Steep seam coal mining in spain

MJ Series Jaw Crusher

MJ Series Jaw Crusher

MJ series jaw crusher is mainly used as a coarse crushing crusher. Its purpose is to crush rocks into smaller particle sizes for subsequent processing…

Read More
MC Series Single-Cylinder Hydraulic Cone Crusher

MC Series Single-Cylinder Hydraulic Cone Crusher

MC series single cylinder hydraulic cone crusher is used in secondary and fine crushing operations. It is widely used in metallurgy, construction, highway,…

Read More
ML Series Vertical Shaft Impact Crusher

ML Series Vertical Shaft Impact Crusher

Vertical shaft impact crusher is often used in the final crushing circuit. Due to the ability to produce fine-grained final products, ML series vertical…

Read More
MD Series Multi-Cylinder Hydraulic Cone Crusher

MD Series Multi-Cylinder Hydraulic Cone Crusher

MD series multi-cylinder hydraulic cone crusher is used in the second and third stages of mineral processing and stone crushing, as well as the superfine…

Read More
MF Series Fixed Shaft Circular Vibrating Screen

MF Series Fixed Shaft Circular Vibrating Screen

In order to eliminate the phenomenon of unbalanced vibration, unstable amplitude, on/off bounce, poor screening effect, and cracking of the screen box…

Read More
MGD Series Vibrating Feeder

MGD Series Vibrating Feeder

MGD series vibrating feeder is designed for ultra-heavy working conditions and is suitable for feeding materials to primary jaw crushers, primary impact…

Read More
MGB series hopper discharge feeder

MGB series hopper discharge feeder

MGB series hopper discharge feeder is mainly used for the uniform, quantitative and automatic control of under-silo feeding of bulk materials.…

Read More
MZA/K Series Circular Vibrating Screen

MZA/K Series Circular Vibrating Screen

MZA/K series circular vibrating screen produced by Meilan has an axis-eccentric circular vibrating screen, which can be used for dry and wet classification…

Read More

Need any help?

We sincerely welcome you to contact us through the hotline and other instant messaging methods. Whether it's project consultation or feedback, we will serve you in the fastest way and spare no effort to save time for customers.

  • OBORTS Company, Opposite the residence of old General Mambou, Near Dragage, Bastos, Yaoundé, Cameroon
    Email: [email protected]

  • EU coal sector facing steep production decline this year

    An example is Spain, where coal mining has been directly and indirectly subsidized by the state in recent decades. Most subsidies are allocated in the form of direct payments to coal-fired power plants for the maintenance of capacity, as well as the provision of obligations to purchase a minimum share of coal from Spanish mines.

  • Research on Stability of Waterproof Coal Pillar in Steep

    Rules of waterproof pillars caving in steep coal seam The caving mechanism analysis of steep coal seam mining After the steep seam was mined, the roof rock curved and caved, the caving rock fell, then free space formed in the upper part of the mined-out area.When the height of the caving zone reaches a certain value, the upper pillar easily

  • New developments in steep seam mining (Journal Article

    The deposit is characterized by dips from 0 to 90/sup 0/ and multiple groups of seams, often close together and up to 15 meters (49 feet) thick. In these steep seam conditions, particularly in dips from 50 to 90/sup 0/, HBL has developed original mining methods that are based on ascending horizontal cuts with sand hydraulic backfill.

  • mining steep dipping seams - africaentrepreneurs.

    New developments in steep seam mining (Journal Article The deposit is characterized by dips from 0 to 90/sup 0/ and multiple groups of seams, often close together and up to 15 meters (49 feet) thick.

  • Backfilling Material in Steep Underground Coal Mines

    The coal seam is a monocline structure that belonged to the steep coal seam. The maximum dip angle is 76 , the minimum dip angle is 60 , and the average dip angle is 67 . The coal seam thickness is 1.23 m to 1.9 m, and the average coal thickness is 1.7 m. The lithology of the coal seam and overlaying and underlying strata are listed in Table1

  • Hydraulic support stability control of fully mechanized

    Tu et al. [28] presented a method for controlling the support stability in the mining of steep coal seams by analyzing the instable mode of sliding and tripping of a support. Zhao et al. [29

  • Coal Mining 101 – The Coal Seam

    May 06, 2013· The typical method of assessing surface mining economics for a coal seam is a calculation of overburden (native rock and soil above a coal seam) moved per clean ton of coal produced, commonly referred to as “mining ratio”. The higher the mining ratio (or more overburden moved per clean coal ton), the higher the cost of producing coal.

  • Technical Aspects of Mining Rate Improvement in Steeply

    Nov 24, 2020· Seam 510 in the Polish Kazimierz-Juliusz coal mine with the use of a unique mechanical face mining system. Seam 510, which is 15–20 m thick and inclined at angles of 40 –45 , was initially treated as uneconomical because e ective mining systems were not available. However, to extract high-quality coal resources, a completely mechanized

  • Case Study Maximising Productivity and Coal Recovery in

    mining efficiency. In this case, Through Seam blasting for steeply dipping coal seams was identified as one such methodology. Through Seam blasting is a unique combination of process management expertise and industry leading products. It draws upon the depth of field experience of Orica’s Technical Services personnel, excellence in

  • Failure Characteristics and Control Technology of

    Dayuan coal mining field is located in the southeast wing of Ningwu coal field syncline, with a Northwest tendency in stratigraphic form. Among them, working face 1201 is located in the deep part of the well field, with a large dip angle (45° on average and 60° at maximum).

  • (PDF) Ground Control in China's Coal Mine: Progress and

    Jun 28, 2015· Steep coal seam mining activities will frequently occur during the next few decades in China. In this study, both experimental and numerical methods are employed to investigate the coal …

  • Baralaba Coal Mine - Mining Technology Mining News and

    The Baralaba North project to expand the open-cut coal mining to the north of the existing Baralaba Coal Mine was approved in 2013 and mining operations at the expansion project started in May 2014. Reserves. the seams are locally found to be very steep. To date, a total of 43 seam splits have been identified at the deposit. Coal is mined


    for deep mining conditions while in the U.S.A shallower and flatter seams have allowed for room and pillar methods. The largest producers of thin seam coal are the former U.S.S.R. and the . U.S.A Other countries produce smaller tonnages but still have significant output. Countries like Spain, the U.K., Czechosl~akia, Poland and

  • Dragline Mining & Reclamation Mining

    May 10, 2018· Both mines are similar in equipment and manpower used; both produce over 2,000,000 tons of clean coal annually. Formerly, loaders and trucks, or shovels and trucks, had been used for this type of mining. The continuous acreages at Hobet’s 21 mine site prompted the consideration of larger mining equipment – namely, the dragline.

  • PRIDE (2014): No other coal like it – WALES IN THE MOVIES

    Jan 10, 2019· "There's a famous coal seam called the Great Atlantic Fault. It starts in northern Spain in the Basque Country, runs through the Bay of Biscay and comes up in south Wales. Then it goes under the Atlantic for miles and miles and comes up again in Pennsylvania. So …

  • Major Mines & Projects Prodeco Mine

    The mining method is open cut mining. This is based on multi-seam, steep dip, truck and shovel open cut coal mining initially in strips to ex-pit dumps with a prog ession over time to haulback waste dumping in-pit. Small scale underground mining was undertaken at La Jagua but is no longer operating.

  • An Approach to Steep Seam Mining - CIM Store

    An Approach to Steep Seam Mining CIM Bulletin, 1972 J. H. H. CHAMBERLIN, Production Manager, Coleman Collieries Limited, Coleman, Alberta . In the Introduction the author briefly discusses the company history as it relates to the development of its contracts with the Japanese steel mills. The main part of the text describes how Coleman

  • Coal Mining Technology,Low Coal Seam Mining,Seam Mining

    “Low coal seam” means “the coal seam which the thickness less than 1.3 meters. Nowadays, there are several countries doing research and test about steeply inclined low coal seam mining technology, but the result is not ideal. Fortunately, this problem was resolved by Chongqing Energy Group recently.

  • Mining Terms - Scottish Mining Website

    Snibble- bar of wood or iron used as a brake or drag on a waggon or hutch in mining Splint coal - hard coal with a dull lustre, which does not cake or break up in a furnace Stoop - A broad pillar of coal or any other mineral left in to support the roof of a working Stoop and room - A system of working a seam by a network of galleries, separated by broad pillars or stoops

  • Waterjetting 20c - collection in Gilsonite and steep seams

    May 29, 2014· Coal mining has some of the same problems, and in Germany the idea was tried (in a slightly modified version) as a way of mining coal. Rather than operate from a drilling rig at the surface, holes were drilled along a very steeply dipping seam.

  • "КБ "ГАРНІ МАШИНИ" ("KB "HARNI MASZYNY") // Rozrobky i

    Cutter-loader coal combine for working on steep and steeply inclined coal seams. Information for mining mechanical engineers in Colombia, Spain, India, Vietnam. We repair, complete with any spare parts, assembly units cutter-loader coal combine «TEMP-1». This coal combine are used for coal mining on steep and steeply-bent coal seams.

  • Experimental and Theoretical Investigation of Overburden

    Sep 28, 2020· Due to the lack of relevant theoretical support such as overburden movement law and reasonable mining method in steep coal seam mining, the surrounding rock control of steep coal seam working face is difficult, the safety condition is poor, and the speed of promotion is slow, which lead to the frequent occurrence of mine dynamic disasters [9

  • Surface mining - Wikipedia

    "Strip mining" is the practice of mining a seam of mineral, by first removing a long strip of overlying soil and rock (the overburden); this activity is also referred to as "overburden removal".It is most commonly used to mine coal and lignite (brown coal).Strip mining is only practical when the ore body to be excavated is relatively near the surface.

  • Experimental and numerical investigation on coal drawing

    Mar 01, 2018· Steep coal seam mining activities will frequently occur during the next few decades in China. In this study, both experimental and numerical methods are employed to investigate the coal drawing from thick steep seam with longwall top coal caving mining. A series of analyses is performed to investigate the features of the drawing body, the distribution of top coal recovery ratio and the …

  • Thin-low coal seam longwall mining technology

    Jan 12, 2017· Coal mines in southwest China are difficult mining which mostly belong to the low, steeply pitching and faults reserved coal seam; experts of HOT are the people who have many years’ experience in low coal seam mechanized mining and production management engineers from Chongqing Coal Group, Sichuan Coal Group and Yunnan Coal Chem Company, etc

  • Failure Characteristics and Control Technology of

    China’s economy, the proportion of deep steep seam in China’s coal mining will increase year by year [1]. However, compared with the shallow coal seam, the geological conditions of the deep coal seam will be more complex. For this kind of large dip angle, especially for the deep coal seam roadway with the influence of weak structural


    coal mining, both points of view are presented in the following report. CHANNELS A channel is the course of an ancient river that eroded part or all of a coal seam and/or the adjacent layers of rock. Because channels are widespread in the lllinois Basin Coal Field, many have serious effects on coal mining. (Contem-

  • Faults (tectonic), Coal Mining Geology, Kentucky

    Jul 06, 2020· Many surface and deep mines (A) in the Western Kentucky No. 4 seam are bordered by tectonic faults. (B) Fault trace near a mine mouth in the Western Kentucky No 4 coal. Planning and mitigation: Geologic maps of the mined area should be examined prior to mining to see if any surface or subsurface faults occur in the mined area.

  • Research on the First Breaking Mechanism of the Main Roof

    Sep 16, 2020· The average buried depth of working face 103 in Luliang mining area is 485 m. The main mining coal seam is No. 5 coal seam. The inclined length of working face is 185 m, the strike length is 1700 m, and the average thickness of coal seam is 4.7 m. The dip angle of coal seam is 26°–32°, with an average of 30°.

  • Underground methods of extraction of thick coal seams—a

    Dec 01, 1984· The state of the art of hydraulic mining in the USSR. Gl~ckauf+Translation 117 (1981) (4) 98-100. 66 L.J. Mills. Hydraulic mining in the USSR. The Mining Engineer (June, 1978) 655-663. 67 V.M. Kolesnikov. Hydraulic mining of the thick and steep coal seam in the Soviet Union. Proc. First Int. Symp. on Thick and Steep Seam Coal Mining.

  • (PDF) Reply to Discussion by M. Karmis and Z. Agioutantis

    They all yield excellent results in¯at seams of the wellstudied coal mining areas (England, USA, Australia) but they do not seem to be accurate enough for subsidence prediction over very steep seams in coal ®elds of countries like Spain or Turkey.

  • Hydraulic Traction Drive Prevails at Steep Inclines Coal Age

    Sep 14, 2012· Typical room-and-pillar mines in steep seam mining applications advance in the dip direction of the seam [AUSIMM 2009, pp.325] instead of the uphill direction. This performance is proof of the CM2’s engineering and hydraulic system, and how an operator can rely on it when it comes to challenging mining conditions.