coal mining machinery to detect underground seam

coal mining machinery to detect underground seam

Diffraction imaging to detect small coal-seam

Seismic (or vibration) data is a widely-used geophysical method to image subsurface environments. To ensure there are no unwelcome surprises concerning coal seam conditions during mining, seismic-reflection surveys, due to their unprecedented ability to detect geological structures, have been widely used by Australian coal mines.

More

Coal seam mapping by underground in-seam seismic

1987-11-1  Coal seam mapping by underground in-seam seismic surveys. Geoexplora- tion, 24: 285-294. Surface geophysical methods and drilling still fail to locate all the geological features which may disrupt longwall mining. The applications for in-seam seismic surveying in Australian coal mines are therefore similar to those reported elsewhere.

More

CHAPTER 11 Mining Technology - Princeton

2007-3-19  coal reserves from deep underground seams. The chapter discusses: three surface mining techniques that are used in the West: 1) area strip, 2) open pit, and 3) terrace pit; two methods of underground mining in the West: 1) room and pillar with contin-uous miners, and 2) longwall mining; recent underground mining technology

More

Using an Azimuth Electromagnetic Wave Imaging

2020-5-27  In this study, a design method for an azimuth electromagnetic wave detection instrument for underground coal mining was proposed. The relationships between the structural parameters of the instrument and installation angles of the coils and the response signals were obtained in

More

Multiple Underground Inseam Seismic (ISS) field ...

The four coal companies involved in this study are Sterling Mining Corporation (1), Buckeye Industrial Mining (2), Bell County Coal Company (2), Bluff Spur Coal Corporation (1), and the NIOSH Bruceton Safety Research Coal Mine in Pittsburgh, PA (1). In this underground ISS project, LMGA Inc. partnered Dr. Rene Rodriguez of GECOH

More

Coal mining - Underground mining Britannica

Underground mining. In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata. Access to the coal seam is gained by suitable openings from the

More

Recent Patents on Thin Coal Seam Mining Equipment ...

2021-5-30  The mining efficiency of thin coal seam and very thin coal seam can be improved and the mining cost can be reduced. Results: Thin coal seam shear mining combines mining, conveying, and supporting processes together and has the advantages of a low fuselage, no extra support required for the working face, and feasibility in a small underground space.

More

4 Coal Mining and Processing Coal: Research and ...

1 天前  Relatively shallow coal deposits are generally extracted by surface mining, and deeper deposits are extracted by underground mining (more detailed descriptions of surface and underground mining processes can be found in Appendix E). There are also situations in which a seam is mined by surface

More

Mining Machinery - an overview ScienceDirect Topics

Over 80 fatalities have been caused by struck-by or pinning accidents involving continuous mining machinery and mobile equipment in underground coal mines since 1984. Proximity detection systems have been developed and are being mandated by MSHA to prevent future accidents involving these types of equipment.

More

Appendix E: Coal Mining and Processing Methods

1 天前  Longwall mining is an automated form of underground coal mining characterized by high recovery and extraction rates, feasible only in relatively flat-lying, thick, and uniform coal beds. A high-powered cutting machine (the shearer) is passed across the exposed face of coal,

More

Diffraction imaging to detect small coal-seam

To ensure there are no unwelcome surprises concerning coal seam conditions during mining, seismic-reflection surveys, due to their unprecedented ability to detect geological structures, have been widely used by Australian coal mines. Locating faults with throws greater than 5-10 metres has been the generally accepted standard for seismic surveys.

More

Multiple Underground Inseam Seismic (ISS) field ...

UNDERGROUND INSEAM SEISMIC METHOD The first documented underground inseam seismic work occurred in the late 1930s when German scientists conducted some experiments to map seam continuity and to detect geologic anomalies ahead of mining. Since their resource base is limited, the German scientists explored

More

CHAPTER 11 Mining Technology - Princeton

2007-3-19  Review of Coal Mining Technologies Currently Used at Federal Mines Although underground mining was, at one time, the principal mining method in parts of Colorado, Montana, Wyoming, and North Dakota, and continues to be so in Utah, sur-face coal mining now predominates in most areas of the West. Because coal seams are

More

Underground Coal Mining Technology (MI303)

Horizon mining. Basic coal mining methods. Bord and pillar mining: development depillaring with semi-mechanised and mechanized board and pillar mining. Longwall mining. Thick-seam mining: Classification of thick seam mining methods, inclined slicing with caving; sub-level caving. Hydraulic Mining. Underground gassification of coal.

More

Using an Azimuth Electromagnetic Wave Imaging

2020-5-27  In this study, a design method for an azimuth electromagnetic wave detection instrument for underground coal mining was proposed. The relationships between the structural parameters of the instrument and installation angles of the coils and the response signals were obtained in

More

Mining Through H₂S Seam Gas Zones in Underground

The release of up to 40 litres of H₂S per tonne of coal mined was predicted from the Southern Colliery panel and mining produced levels of up to 200ppm of H₂S in the return roadway from the longwall. This paper details the experiences associated with mining through these H₂S zones and the methods used to detect and predict its existence.

More

Recent Patents on Thin Coal Seam Mining Equipment ...

2021-5-30  The mining efficiency of thin coal seam and very thin coal seam can be improved and the mining cost can be reduced. Results: Thin coal seam shear mining combines mining, conveying, and supporting processes together and has the advantages of a low fuselage, no extra support required for the working face, and feasibility in a small underground space.

More

Mine Machines, Coal Cutting - National Coal Mining

2017-2-24  In modern longwall mines, shearers use cutting disks on ranging arms, to slice through all the coal in the seam. Shearers can have two cutting disks, and work like bacon-slicers in removing the coal from the face. Find out more about coal cutting machines, on site at the Museum in the Coal Interface Gallery and on the underground tour.

More

Remote Control/Automation Introduction

Miscellaneous - Remote Control/Automation. Because longwall operations are cyclic and repetitive when running well, it would appear ideal for the use of remote control or even full automation. In fact there have long been attempts to introduce various degrees of automation (remotely operated faces were in existence in the early 1960's), but ...

More

Coal Mining: How Is Coal Mined? - Science ABC

2021-1-7  Coal mining (also called colliery) is the process of extracting coal from the ground’s surface or from deep underground. Coal miners literally raze entire mountain ranges to feed our insurmountable desire for cheap energy. There’s something brutally simple about coal mining. Take away the monstrous-but-sophisticated machinery and eco ...

More

Underground Coal Mining Technology (MI303)

Horizon mining. Basic coal mining methods. Bord and pillar mining: development depillaring with semi-mechanised and mechanized board and pillar mining. Longwall mining. Thick-seam mining: Classification of thick seam mining methods, inclined slicing with caving; sub-level caving. Hydraulic Mining. Underground gassification of coal.

More

InSAR- and PIM-Based Inclined Goaf Determination for ...

2020-11-27  to detect illegal mining activities [3]. To date, the main methods for determining the location of illegal ... of the coal seam mining boundary on the horizontal plane. However, the actual situation is that the ... underground coal mining have the characteristics shown in Figure2. Figure 2. Subsidence and curvature curves of a horizontal goaf ...

More

UNDERGROUND MINING - Underground mining and

2021-6-14  Most coal seams are too deep underground for opencast mining and thus type of mining is called underground mining. Underground mining currently accounts for about 60% of world coal production. In deep mining, the room and pillar method moves along the seam, while pillars and timber are left standing to support the coal mine roof.

More

Recent Patents on Thin Coal Seam Mining Equipment ...

2021-5-30  The mining efficiency of thin coal seam and very thin coal seam can be improved and the mining cost can be reduced. Results: Thin coal seam shear mining combines mining, conveying, and supporting processes together and has the advantages of a low fuselage, no extra support required for the working face, and feasibility in a small underground space.

More

Mining Through H₂S Seam Gas Zones in Underground

The release of up to 40 litres of H₂S per tonne of coal mined was predicted from the Southern Colliery panel and mining produced levels of up to 200ppm of H₂S in the return roadway from the longwall. This paper details the experiences associated with mining through these H₂S zones and the methods used to detect and predict its existence.

More

Remote Control/Automation Introduction

Miscellaneous - Remote Control/Automation. Because longwall operations are cyclic and repetitive when running well, it would appear ideal for the use of remote control or even full automation. In fact there have long been attempts to introduce various degrees of automation (remotely operated faces were in existence in the early 1960's), but ...

More

Major Mines Projects No. 8 (CST Coal) Mine

The underground mines utilize the room-and pillar mining method. The mining activities include development and panel preparation followed by de-pillaring mining. Five-entry panels are usually developed with one belt conveyor system. Mining recovery ranges from 75 to 80% for the different seam thicknesses after de-pillaring the developed panels.

More

Prasindo Consulting: Coal is mined by two methods ...

2010-9-12  Underground Mining There are two main methods of underground mining: room-and-pillar and longwall mining. In room-and-pillar mining, coal deposits are mined by cutting a network of ‘rooms’ into the coal seam and leaving behind ‘pillars’ of coal to

More

Top Coal Caving Longwall underground COAL

A brief description of longwall top coal caving (LTCC) is included at the end of the Longwall section of the Fundamentals of Coal Mining module of this web site. Despite the fact that there are numerous coal seams in Australia which are thick enough for LTCC to be used to increase recoveries, potentially at a reduced cost/tonne, there has been ...

More

Coal Mining: How Is Coal Mined? - Science ABC

2021-1-7  Coal mining (also called colliery) is the process of extracting coal from the ground’s surface or from deep underground. Coal miners literally raze entire mountain ranges to feed our insurmountable desire for cheap energy. There’s something brutally simple about coal mining. Take away the monstrous-but-sophisticated machinery and eco ...

More