Subsidence rules of underground coal mines for different ...

2017-8-29 · Underground coal mining causes deformation and move-ment of strata and ground surface. Some protected objects, such as houses and railways, around the coal panel would be damaged if a mining plan was carried out without considering the consequences. Mining subsidence has been studied for more than 60 years and some general rules have been obtained.

coal mining methods china

Surface Coal Mining Methods in China - InTech. Mar 9, 2012 ... 2. Surface Coal Mining Methods in China. Changsheng Ji. School of Mines, China University of Mining …

Methods for Controlling Explosion Risk at Coal Mine ...

Beijing, China: National Center for International Exchange & Cooperation on Work Safety (SAWS), 2007; :161-168. At coal mine working faces, simultaneous application of three basic elements reduces the methane explosion hazard: (1) adequate ventilation, (2) …

About Coal Mining Methods

Surface Coal Mining Methods in China - InTech. Mining Methods 26 Fig. 3. Power shovel used in Haizhou Openpit coal mine. with extraction activities ultimately …

(PDF) Geohazards at Surface Coal Mines Caused by Mining ...

Mining experiment and monitor results show that water pre-infusion and pre-splitting blasting can improve top coal caving ability, symmetrical caving, relieve space for large area dynamic collapse ...

Intech-Surface Coal Mining Methods in Australia

2018-9-25 · Mining Methods 6 Fig. 3. Overall mining sequence of a typical surface coal mine in Australia (after Westcott et al., 2009). 2.1 Dragline method Dragline is the predominant mach ine which is used to remove the overburden and expose the coal when the deposit s characteristics match the draglines physical capabilities. Once

What Type Of Machinery Is Used In Coal Mining In China

Surface Coal Mining Methods in China - InTech. Surface coal mining methods used in China from 1949 to 1980 were mostly open pit ... In area type mining, coal is commonly hauled by fleet of trucks from the pit to ... Read more. what type of machines used in coal mine.

About Pingshuo

2019-8-29 · The advanced surface and underground combined coal mining method in Pingshuo Mining Area for raw coal production can highly improve the resources recovery. A "single bucket/shovel – truck" interval mining technique is applied to the surface coal mining production, the mechanization degree of the surface coal mining is 100 % and the coal recovery rate of the surface coal mining could be ...

Surface Coal Mining Methods in China

5. Mining: Methods and Impacts | Surface Coal Mining ...

Mining Methods | IntechOpen

2012-3-9 · 1. Surface Coal Mining Methods in Australia. By Rudrajit Mitra and Serkan Saydam. 18159: Open access peer-reviewed. 2. Surface Coal Mining Methods in China. By Changsheng Ji. 3899: Open access peer-reviewed. 3. Ground Control for Underground Evaporite Mine …

Surface Subsidence Control during Deep Backfill Coal ...

2020-5-29 · If the surface subsidence was set as the indicator, a backfilling depth of 1098∼1220 m requires a filling ratio of 82.5%∼79.7% to ensure safety. Therefore, the filling ratio at backfill mining area 930 in the Tangkou coal mine should be designed with a value greater than 82.5%. 4.2. Damage Analysis for Backfill Mining.

Surface subsidence prediction method of backfill-strip ...

2019-3-15 · China is a major coal mining country, and its coal production reached 3.41 billion tons in 2016. However, intensive and massive coal mining causes a series of geological hazards and environmental problems (Bian et al. 2012; Chen et al. 2018; Salmia et al. 2017), such as surface subsidence, ground fissures, landslides, land occupation, and groundwater pollution.

5. Mining: Methods and Impacts | Surface Coal Mining ...

5 Mining: Methods and Impacts OVERVIEW OF SURFACE MINING, SPOIL HANDLING, AND RECLAMATION There are three major types of surface mining procedures, which in the context of the whole mining and reclamation process have common features as …

(PDF) Mining Methods: Part I-Surface mining

Mining Methods, Surface mining Depend on wa ter or another liquid (e.g., dilute sulfuric acid, weak cyanide solution, or ammonium c arbonate) to e xtract the miner al.

Surface subsidence control theory and application to ...

2015-2-12 · Solid backfill technology, which can achieve precise control of surface subsidence, has become the primary method used to extract "under three" coal resources (under railways, buildings, and water bodies), especially under buildings. This paper proposes a probability integration model for surface subsidence prediction based on the equivalent mining height (EMH) theory and describes the ...

Intelligent identification method for near-surface ground ...

2021-6-25 · Shi Suzhen is an associate professor and master supervisor at China University of Mining and Technology (Beijing). Her main work is seismic data interpretation and inversion. Her contact information is State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), 11 Ding Xueyuan Road, Haidian District, Beijing 100083, China.

Economic Geology | IntechOpen

Surface Coal Mining Methods in China. By Changsheng Ji. Part of book: Mining Methods. 3. Longhole Stoping at the Asikoy Underground Copper Mine in Turkey. By Alper Gönen. Part of book: Mining Methods. 4. Ground Control for Underground Evaporite Mine in Turkey. By T. Onargan, K. Kucuk, A. Deliormanli, S. Saydam and M.Y. Koca. Part of book ...

Coal | National Geographic Society

Surface Mining If coal is less than 61 meters (200 feet) underground, it can be extracted through surface mining. In surface mining, workers simply remove any overlying sediment, vegetation, and rock, called overburden. Economically, surface mining is a cheaper option for extracting coal than underground mining.

surface mining coal

Surface Coal Mining Methods in China - InTech. 9 Mar 2012 ... 2. Surface Coal Mining Methods in China. Changsheng Ji. School of Mines, China University of Mining …

Longwall surface subsidence control by technology of ...

2017-9-1 · Surface subsidence is a typical ground movement due to longwall mining, which causes a series of environmental problems and hazards. In China, intensive coal extractions are commonly operated under dense-populated coalfields, which exacerbates the negative subsequences resulted from surface settlement.

Properties and Application of Backfill Materials in Coal ...

Coal is the basic resource underpinning energy generation in China, however, constant, large-scale mining of coal results in many problems such as ecological destruction of mining areas. As a result, backfilling of solid waste underground is proposed to control strata and surface …

Surface Coal Mining Methods in China

2018-9-25 · Surface Coal Mining Methods in China 29 Dafeng mine is designed with annual output 0.9Mt anthracite and power shovel of 3 to 4 cubic meter dipper size for loading on 27 to 32, 45 ton off-highway trucks. The coal seams total thickness is 38.77 meters with a dipping angle from 5 to 17 degrees. ...

Surface-mining opportunities lie in market-related ...

2021-8-6 · Johannesburg-based mining equipment distributor Vermeer Equipment Suppliers is starting to focus on certain market-related commodities and associated open-cast mines to market its surface excavation machines, says Mining and Pipeline Sales Segment Manager, Gareth Cramond.. The machines are being used in Africa at, among others, China Molybdenum''s Tenke Fungurume copper and cobalt mine…

Surface Coal Mining Methods in China | IntechOpen

2012-3-9 · Surface Coal Mining Methods in China, Mining Methods, Turgay Onargan, IntechOpen, DOI: 10.5772/35061. Available from: Over 21,000 IntechOpen readers …

Numerical simulation of overburden and surface movements ...

2016-1-1 · The XV2214 (east) panel in Wangtaipu mine is a longwall face. The mining plan employs both the strip pillar and Wongawilli mining methods in order to achieve high efficient coal mining under surface structures. Firstly, the design of strip pillar mining was determined based on the geological and mining …

Study on Numerical Models in Predicting Surface ...

2021-3-27 · Accurate prediction of surface deformation due to the extraction of underground coal seams is a significant challenge in geotechnical engineering. This task is further compounded by the growing trend for coal to be extracted under buildings by leaving coal pillars in place. To rationalize the design of mining schemes to ensure effective control of surface deformation, precise 3D numerical ...

Surface Coal Mining Methods in Australia | IntechOpen

2012-3-9 · Surface Coal Mining Methods in Australia, Mining Methods, Turgay Onargan, IntechOpen, DOI: 10.5772/39172. Available from: Rudrajit Mitra and Serkan Saydam …

Surface coal mining practice in China

2009-9-1 · Mining methods Since most of surface coal mines currently operated in China have a gently dipping angle of no more than 10 degrees and the rolling topography, area mining method is widely used. The typical one like HDG is divided into 3 mining areas, the first area began operation with 4 outside spoil dumping areas at first, and then gradually ...

Methane Extraction from Abandoned Mines by Surface ...

Considerable methane resources exist in abandoned coal mines. However, methane extraction from abandoned mines in China is still in the exploratory stage. This study presents technologies and engineering practices suitable for the extraction of gob methane from abandoned mines using surface vertical wells, including methane drainage systems, well bottom locations, and an intermittent drainage ...