New Techniques for Mining Thin-Seam Mountaintop Coal …

These methods were aimed at extracting coal from thin seams and focused on the use of 'roof-fall-tolerant' (RFT) mining concepts. These methods could be used on existing, abandoned highwalls or in conjunction with new highwall mining. The research was conducted using small-scale and quasi-full-scale physical models to obtain experimental …

low seam mining equipment

Underground Thin-Seam Coal Mining in ia, Developments of thin-seam mining equipment,, this unwillingness to innovate is low profit margins.. Coal mining - Wikipedia Coal mining is the process of extracting coal from the ground Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity..

New lease of life for underground thin seam mining

Purpose-built and modified thin seam mining equipment has been brought into Australia and modified electrically to comply with statutory requirements. These …

Joy Longwall Shearers

Full range of cutting heights available to accommodate seam heights from 1.3 to 9 meters (4.3 to 30 ft.) Full range of installed ranging arm power options available (300 kW to …

New advances in automatic shearer cutting technology for …

Current situation of automatic mining technology in thin seams. There are two major automatic mining technologies for thin seams: one using a coal shearer and …

Joy 14CM15 Continuous Miner |

Find what works for you. Designed for low- to mid-seam applications, the Joy 14CM15 continuous miner delivers an exceptional combination of cutting power, reliability and …

Ultra-thick Seam Longwall Mining in China

Through partnership among coal producers, equipment manufacturers, and research institutions, China developed the ultra-thick seam longwall mining system by stages: prior to 2005, development …

Recent Patents on Thin Coal Seam Mining Equipment

Background: China's thin and extremely thin coal seam resources are widely distributed and rich in reserves. These coal seams account for 20% of the recoverable reserves, with 9.83 billion tons of industrial reserves and 6.15 billion tons of recoverable reserves. Objective: Due to the complex geological conditions of the thin coal seam, the plow …

New development of longwall mining equipment based …

Fully mechanized equipment development and mining process design about the thin coal seam with nodules and parting should be based on law of mine pressure.By the means of the theoretical ...

Roof movement and instability fracture characteristics in

Based on extensive prior research on coal seam mining, while the coal seam has a thickness of nearly 1 m, the roof strata display a hinging structural instability during mining-induced fracturing. The fifth layer, made up of fine sandstone with a thickness of 23.75 m from the coal seam's roof, surpasses the height of the mining …

Recent Patents on Thin Coal Seam Mining Equipment

China's thin and extremely thin coal seam resources are widely distributed and rich in reserves. These coal seams account for 20% of the recoverable reserves, with 9.83 billion tons of industrial reserves and 6.15 billion tons of recoverable reserves. Due to the complex geological conditions of the thin coal seam, the plow mining method cannot be …

Fully mechanized coal mining technology for thin coal …

The technology requires simple operations, reduces the risk of operating, avoids roof accidents and maintains production safety. Therefore, the fully mechanized coal mining with roller shearer is most fit for the extraction of extremely thin coal seam whose thickness is around 0.9 m (Sheng et al., 2007; Wang et al., 2005; Wang, 2004). 5.

Method and apparatus for increasing the efficiency of highwall mining

Highwall seam mining machines of the type to which the present invention relates are those such as the thin seam mining machine described in detail in Todd U.S. Reissue Pat. No. Re 31,622 which is hereby expressly incorporated into this specification by reference. A highwall mining machine 10 embodying the present invention is illustrated in ...

Joy 12CM27 Continuous Miner

12CM series. Joy 12CM27. Brochure. Gallery. Overview. Specifications. Technology. Upgrades. The 12CM27 continuous miner, with a solid-head cutting head system, …

an expert system for equipment selection of thin coal …

Sheng et al. 2007). In recent years, coal mining keeps high intensity in China. As a result of the predatory mining, thick seam mined with thin seam abandoned, thick and min-thick seam are becoming gradually exhausted in mid-eastern and some old mines. In order to balance productivity and prolong the service life of coal mine, the TCS are to be ...

Recent Patents on Thin Coal Seam Mining Equipment

Recent Patents on Thin Coal Seam Mining Equipment Buy Article: $68.00 + tax (Refund Policy) Authors: Wang, Yanxiang; Yang, Daolong; Xing, Bangsheng; Zhao, Tingting; ... Background: China's thin and extremely thin coal seam resources are widely distributed and rich in reserves. These coal seams account for 20% of the recoverable reserves, …

Practice and prospects of fully mechanized mining technology for thin

Method The equipment integrates mining operations, conveying operations and supporting operations, and is suitable for mining short and extremely thin coal seam with height of 0.35m~0.8m and width ...

Joy Shuttle Cars

First introduced in 1938, Joy shuttle cars continue to be the gold standard for batch haulage vehicles in the underground mining industry. Our shuttle cars are known for their exceptional reliability, lower operating costs, …

Joy finds success with miner bolter

JOY Mining Machinery is finding success with its 14ED25 miner bolter, with six machines currently in use in the US and several more orders confirmed. Staff Reporter. 26 March 2010. Those miner bolters in production have achieved monthly averages of 18-30 metres (60 to 100 feet) per 8-hour operating shift. Peak advance rates of more than …

Recent Patents on Thin Coal Seam Mining Equipment

Background: China's thin and extremely thin coal seam resources are widely distributed and rich in reserves. These coal seams account for 20% of the recoverable reserves, with 9.83 billion tons of ...

New development of longwall mining equipment based …

longwall coal mining equipment. 1 Technologies of automation equipment for longwall thin seam working face The thin seam coal reserves with depth below 1.3 m in China accounts for about 20% of the total reserves. More than 85% mining areas have thin seams. Only Fengfeng Group has about 125 million tons of thin

Joy 12CM12 Continuous Miner |

12CM12. Maximum cutting height 145 - 181 in. Minimum cutting height 55 - 85 in. Total machine power. 818 HP @ 60 Hz. 730 HP @ 50 Hz. View all specs. Request a quote Find a service location. Download brochure Order parts View ProMiner continuous miner training.

Research on an Intelligent Mining Complete System of a …

The mining environment of thin coal seam working faces is generally harsh, the labor intensity is high, and the production efficiency is low. Previous studies have shown that thin coal seam mining finds it difficult to follow machines, does not have complete sets of equipment, has a low degree of automation, and has difficult system co-control, which …

Intelligent fully mechanized mining support technology and equipment …

In the context of the complex geological conditions such as large thickness variation of thin-medium-thick coal seam, development of strike fault and broken roof in Southwest China, intelligent fully mechanized mining support technology and equipment for thin-medium-thick coal seam are proposed.Through the implementation of grouting reinforcement …

New advances in automatic shearer cutting technology for thin …

Currently, theoretical research and engineering practice about the mining technology and equipment for thin seams have been carried out at home and abroad (Fang et al., 2008; Guo, 2013; Liu, 2011; LV, 2009; Wang, 2009, 2016; Xu et al., 2012; Yuan, 2011).As a result, mechanized and automatic mining is the ideal path and the …

Fully Mechanized Coal Mining Technology for Thin Coal Seam …

In view of the present situations and existing problems of thin coal seam mining under complex geological conditions, low-profile mining equipment for fully mechanized coal mining was developed. ... Emily Joy Haas and more... The SAGE Encyclopedia of Cancer and Society. 2015. ... Li J.P., Du C.L. and Zhang Y.H., 2005. …

Optimal Selection of a Longwall Mining Method for a Thin Coal Seam

The selection of a mining method is one of the most important decisions made by mining engineers. An appropriate fully mechanized mining method is of great importance to mining design and capacity planning for thin coal seams. Therefore, the comprehensive evaluation of alternative mining methods is an important part of mining …

Joy 14CM15 Continuous Miner |

Find what works for you. Designed for low- to mid-seam applications, the Joy 14CM15 continuous miner delivers an exceptional combination of cutting power, reliability and productivity. It is available with various …

Coal Zoom | Joy Celebrates 90 Years

Joy Celebrates 90 Years. Joy – the Man and the Company That Revolutionized Mining. It would be hard to imagine, inventive though he was, that Joseph Francis Joy ever could have envisioned the success and the huge impact his company would have on the world's underground mining industry. Ninety years ago, in 1919 Joseph Joy (1883-1957) — an ...