the fully mechanized thin coal seam mining technology in highly gassy mines, it can speed up the mining of methane releasing coal seams, achieve a balanced extraction of thick …
Some past attempts at thin-seam mining are discussed. The more recent advances in the guidance systems used in autonomous mining machines are introduced. The state-of-the-art products of several manufacturers to address the integration of mining and continuous haulage systems are also highlighted. That background is employed in devising a ...
Thin seam mining. 2. THIN SEAM MINING The definition of thin seam varies considerably against coal mining countries. There are, however, fairly well defined minimum thickness in which equipment can work. Underground mining of thin seam has invariably been more difficult, hazardous and costly process than working of thicker seam.
the No. 5 seam is mined it is thin i.e. less than 2 m and tends to be mined by underground mining methods. Multi-seam mining has also been carried out in the Natal coalfields, but the seams are generally thin (less than 1–2 m thick) and occur at an average depth of less than 160 m. The thickness of the partings between the seams made it possible
New advances in automatic shearer cutting technology for thin seams in Chinese underground coal mines. Wang Chen ... (2011) Practices on fully mechanized coal mining equipment matched and mining in thin seam of Datong mining area. Coal ... (2014) An innovative approach to thin coal seam mining of complex geological …
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. ... Du C.L. and Zhang Y.H., 2005. Our country mining equipment of the thin and extremely thin coal seam present situation and the …
Compared the hydraulic punching in the borehole with the ordinary drilling machine, the average speed of mining soft sub layers increased from 0.5 t/h to 3.6 t/h, the equivalent diameter of mining ...
1.4 Singh 1998 and Rakesh et al ., 2015 suitably classified underground mining methods as per the seam thickness as shown in the Table 4.0. Table 4.0. classification of thick seam mining methods with respect to the seam thickness (Singh, 1998, Rakesh et al., 2015) 1.5 India has a rich experience of thick seam mining by
Among the mechanised working faces of a thin seam, those involving coal shearers takes 85% according to incomplete statistics. Without explanation, fully-mechanised mining technology in this paper ...
The water-blocking property of clay at the bottom of the Cenozoic overburden is an important factor for mining safety and protecting underground latent water resources in thin bedrock coal seam mining. The failure mechanism of such a clay is studied based on the actual engineering background of the uan Coal Mine. The …
areas can be difficult due to the obstruction of a large percentage of openings by equipment. Fotta et al [3] did research to identify the types of injuries common to operating mines that exploit thin-seam resources. Due to their research objectives, longwall operations and large mines that
Penetration depths in a 20° seam for different machine inclinations & seam thicknesses (Ross et al., 2019) ... option for mining thin reasonably flat coal seams ... mining equipment underground ...
Earth Sciences. Earth Sciences questions and answers. A mining company is planning to construct an underground coal mine within a thin coal seam that dips 2 degree due east. You are the mine engineer, and it is your task to make sure that the mine adits do not fill with water. This requires that each adit has a slope of no less than 1 degree.
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 …
In order to effectively solve the problems existing in thin coal seam mining, Binhu Coal Mine has established intelligent fully mechanized mining and actively …
Bołoz introduced, in detail, the common mining methods in thin coal seam underground mining and the disorders in the mining machines used in the methods …
Wang et al. 12 carried out research and analysis on the mining process of ultra-thick coal seam in 8.8 m large mining height working face by means of similar simulation, numerical simulation and ...
• A number of technologies were identified from extra low profile (XLP) mining equipment and equipment used in other industries, which could be an alternate means for thin-seam transport applications. These outcomes could form a basis for future COALTECH proposals to address thin-seam production concerns in the South African coal industry.
In the planning of mining operations in underground mines, an eS (MinePlanex) is developed to support the designers of production planning in hard coal mines within the …
automatic mining is the ideal path and the inevitable way to improve production efficiency and reduce labor intensity for thin seam (MAO et al., 2011; Wang and Tu, 2015; Yuan, 2017). However, automatic mining can be achieved only in suitable conditions, such as coal thickness changed very little or without geological structures.
1. Introduction. Thickness of a coal seam is an important geological parameter during selection of a suitable underground mining method for its efficient extraction. A coal seam of around 3–4 m thickness is, generally, observed to provide normal working height for efficient extraction and is suitable for most of the conventional …
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 ...
A coal seam of around 3–4 m thickness is, gen-. erally, observed to provide normal working height for efficient. extraction and is suitable for most of the conventional mining. methods ...
At present, literature reports on thin coal seam are scarce, among which Chinese scholars mostly focus on mining simulation experiment (Ma et al. 2008) and fully mechanized mining technology in ...
In China, the mechanised mining of thin coal seam mainly relies on a drum shearer. However, the diameter of the drum is relatively small, and the loading rate is relatively low due to the ...
It is predicted that coal mining in Southwest ia, and the economic stability that it brings to the area, will continue to decline over the next decade unless an environmentally sound, and economically viable means can be found to extract seams of high quality coal in the thickness range of 14 to 28 inches. Research into autonomous machine guidance, …
An analysis of the potential for US underground thin seam (< 28'') coal mining is undertaken to provide basic information for use in making a decision on further thin seam mining equipment development. The characteristics of the present low seam mines and their mining methods are determined, in order to establish baseline data against which ...
Guang Xu. Abstract Coal seam that is thinner than a certain value is defined as thin coal seams (TCS). It commonly occurs in China as it covers 84.2% of the mining area. This situation is even severe in China's large surface coal mines, in which TCS accounts for 10–50% of the total reserve.
ECONOMICS OF THIN SEAM COAL MINING. CHAP. RS:ECONOMICS. OF THIN SEAM COAL MINING.8.1. Introduction.It is a known fact that thin seam mining can be very expens. ve, both in monetary value and in human life. The main decision to pursue thin coal seams is. made on both strategic and financial factors. In modem society and with …
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 …
Bołoz [33] introduced, in detail, the common mining methods in thin coal seam underground mining and the disorders in the mining machines used in the methods of Highwall, Auger, and Punch ...
It is predicted that coal mining in Southwest ia, and the economic stability that it brings to the area, will continue to decline over the next decade unless an environmentally sound, and economically viable means can be found to extract seams of high quality coal in the thickness range of 14 to 28 inches. Research into autonomous machine guidance, …
Chapter 7 A Proposed Mining System for Thin-Seam Mining 50-80 7.1 Introduction 50 7.2 Mining Layout 50-52 7.3 Equipment 53-56 7.4 Coal Transportation 57 7.5 Guidance System for this Layout 58-63 7.6 Ventilation 64-75 Bleederless Ventilation System Bleeder Ventilation System Ventilation Modeling Suggested Ventilation Plan 7.7 Rate of …
Section snippets Mining conditions of No. 16 upper and No. 17 thin coal seams. The No. 16 upper and No. 17 coal seams in Yanzhou mining area, China, are both thin. The thickness of No. 16 upper coal seam varies from 0.60 to 1.60 m while the No. 17 coal seam from 0.50 to 1.39 m. They are both of complex geological conditions, widely …
Limited by the buried depth of coal seam, open-pit mining is suitable for near-surface coal seams, but underground mining could meet the mining requirements of most coal mines [1,2].The Jurassic coalfield in northern Shaanxi is one of the largest coalfields in China [].The coalfield is located in the border zone between the Mu Us …
