Coal Safety Geology

Geologic Hazards and Roof Stability in Coal Mines

coal mines, 1983-99. safety and productivity. These structures weaken the roof beam and can cause damage that is not prevented by conventional roof support. In addition, the occurrence of the geologic structures may not be obvious to the untrained observer. For these reasons, NIOSH has undertaken to study and document the nature and occurrence of common geologic structures that may form ...

Coal Geology - an overview | ScienceDirect Topics

Coal-mining safety is a reflection of coal-mining risk and its unique chemical–physical properties as a carbonaceous mineral. Risk has several meanings that are important to coal safety. Risk is both a perception held by every person who works in the industry and a technical concept open to qualitative and quantitative assessment. Perceptions of what is acceptable and unacceptable risk can vary …

The Geology of Fossil Fuels - UC Homepages

Safety Geology of coal mining Underground mining: far beneath the ground surface, accessed by tunnels Surface mining: close to ground surface, accessed by excavation Origin of petroleum and natural gas Petroleum as a substance Yellow to black liquid found beneath earth’s surface Petroleum covers both naturally unprocessed crude oil and petroleum products separated by fractional distillation ...

Coal Exploration and Mining Geology

Keywords: Coal, geology, exploration, mining, resources, reserves, geophysical methods, drilling, borehole logging, deposit evaluation, quality assessment, environmental impacts Contents 1. Introduction 2. Objectives of Coal Exploration Programs 3. Background Studies for Exploration 3.1 Exploration Titles 3.2 Evaluation of Existing Data 4. Surface Geological Studies 4.1 Geological Mapping 4.2 ...

Coal geology in China: an overview

health, environmental, and mine safety issues and to maximize resource recovery and use justifies a vigorous coal research effort. Although it is widely known that China is largest coal producer and consumer in the world, what is less well known is the fact that China has quietly become the world’s leading country for research and development on coal. Although more and more papers related to ...

Coal in a Nutshell - ThoughtCo

23/01/2020· Coal geologists study their subject the same way that other geologists study other rocks. But instead of talking about the minerals that make up the rock (because there are none, just bits of organic matter), coal geologists refer to the components of coal as macerals. There are three groups of macerals: inertinite, liptinite, and vitrinite. To oversimplify a complex subject, inertinite is generally …

Characterization of the coal resources of South Africa

Geology and coal quality of the South African coalfields Coal is found in South Africa in 19 coalfields (Figure 1), located mainly in KwaZulu-Natal, Mpumalanga, Limpopo, and the Free State, with lesser amounts in Gauteng, the North West Province and the Eastern Cape. Table I summarizes pertinent geological information about the coal seams in each of the 19 coalfields, while Table II contains ...

Coal mining - Wikipedia

11/04/2003· As the longwall mining equipment moves forward, overlying rock that is no longer supported by coal is allowed to fall behind the operation in a controlled manner. The supports make possible high levels of production and safety. Sensors detect how much coal remains in the seam while robotic controls enhance efficiency. Longwall systems allow a 60-to-100 percent coal recovery rate …

Coal Mine Safety - Virtual Training

Geology; Coal Mine Safety; Mined Land Reclamation; Mineral Mining; Administration; public. Contact Us; Emergency Contacts; File a Complaint; Submit a FOIA; DMME Newsroom; Contract Opportunities; Pocahontas Exhibition Mine; About us. History of DMME; DMME A to Z; Boards and Advisory Committees; Strategic Plan

Coal: Dangerous Power | Energy Justice Network

Geology and Markets, ... Coal presents a serious threat to the safety of a community; threatening both water bodies (including drinking water) and air quality. Health Impacts & Coal Mining: There are several types of coal mining and they are all unsafe for workers and communities. Underground mine workers often suffer from ‘black lung’ or pneumoconiosis. Workers get black lung disease from ...

International Journal of Coal Geology

A series of di fferent-sized coal samples are prepared with di erent inclinations of anisotropy. Interior structure is obtained via X-ray CT and strength measured under uniaxial confinement. 3.1. Properties of coal The coal blocks used in this experiment were excavated from the No. 45 coal seam in the Wudong Mine, Xinjiang Province, China. The

Coal geology in China: an overview

health, environmental, and mine safety issues and to maximize resource recovery and use justifies a vigorous coal research effort. Although it is widely known that China is largest coal producer and consumer in the world, what is less well known is the fact that China has quietly become the world’s leading country for research and development on coal. Although more and more papers related to ...

Application of extension theory to the evaluation of coal ...

A novel extension evaluation method of coal mines geological safety was proposed in this paper. Based on the extension theory, a matter-element model was established for qualitatively and quantitatively describing the safety evaluation problem of coal mines geological safety. The degree of relation based on the dependent function was employed to determine the nature and the level of the safety ...

Characterization of the coal resources of South Africa

Geology and coal quality of the South African coalfields Coal is found in South Africa in 19 coalfields (Figure 1), located mainly in KwaZulu-Natal, Mpumalanga, Limpopo, and the Free State, with lesser amounts in Gauteng, the North West Province and the Eastern Cape. Table I summarizes pertinent geological information about the coal seams in each of the 19 coalfields, while Table II contains ...

Coal Mine Safety - Virtual Training

Geology; Coal Mine Safety; Mined Land Reclamation; Mineral Mining; Administration; public. Contact Us; Emergency Contacts; File a Complaint; Submit a FOIA; DMME Newsroom; Contract Opportunities; Pocahontas Exhibition Mine; About us. History of DMME; DMME A to Z; Boards and Advisory Committees; Strategic Plan

Coal Mining - Risk Assessment

The risk assessment results are used by the Division of Mines in accordance with Section 45.1-161.81 and 45.1-161.82 of the Coal Mine Safety Laws of Virginia to schedule inspection activities and effectively utilize resources of the Department. Underground mines are ranked each six months on January 1st and July 1st using the previous year's data. Surface mines will be ranked on July 1st. Risk ...

Coal in China - Wikipedia

Coal reserves. As of the end of 2014, China had 62 billion tons of anthracite and bituminous, and 52 billion tons of lignite quality coal. China ranks third in the world in terms of total coal reserves behind the United States and Russia. Most coal reserves are located in the north and north-west of the country, which poses a large logistical problem for supplying electricity to the more ...

The spontaneous combustion of coal and its by-products …

01/10/2007· International Journal of Coal Geology, 11 (2) (1989), pp. 143-169. Article Download PDF View Record in Scopus Google Scholar. Hower and Robertson, 2003. J. Hower, J.D. Robertson. Clausthalite in coal . International Journal of Coal Geology, 53 (2003), pp. 219-225. Article Download PDF View Record in Scopus Google Scholar. Hudak, 2002. P.F. Hudak. Spontaneous combustion of …

Pillar design in coal mines - SlideShare

This formula works well for a coal pillar safety factor of 1.8~2.2 with a wp/h ratio between inches 2 to 8. w Holland Formula (1973) S p = S 1 p h Given different formula and recommended safety factor for using this formula is 2.0. Salamon-Munro Formula (1967) Salamon- Based on the 125 case histories in South African coal fields. where Sp is expressed in psi and MPa and pillar dimensions are ...

Coal: Dangerous Power | Energy Justice Network

Geology and Markets, ... Coal presents a serious threat to the safety of a community; threatening both water bodies (including drinking water) and air quality. Health Impacts & Coal Mining: There are several types of coal mining and they are all unsafe for workers and communities. Underground mine workers often suffer from ‘black lung’ or pneumoconiosis. Workers get black lung disease from ...

International Journal of Coal Geology

Coal is a naturally discontinuous, inhomogeneous, and anisotropic material. The uniaxial compressive strength (UCS) of coal is sig-nificantly influenced by sample size and microstructures, including the presence of mineral inclusions and pre-existing cracks (Protodiakonov and Koifman, 1963; Wagner, 1974). Understanding the mechanical

Coal geology in China: an overview

health, environmental, and mine safety issues and to maximize resource recovery and use justifies a vigorous coal research effort. Although it is widely known that China is largest coal producer and consumer in the world, what is less well known is the fact that China has quietly become the world’s leading country for research and development on coal. Although more and more papers related to ...

Coal Mine Safety - Virtual Training

Geology; Coal Mine Safety; Mined Land Reclamation; Mineral Mining; Administration; public. Contact Us; Emergency Contacts; File a Complaint; Submit a FOIA; DMME Newsroom; Contract Opportunities; Pocahontas Exhibition Mine; About us. History of DMME; DMME A to Z; Boards and Advisory Committees; Strategic Plan

Coal Mining - Risk Assessment

The risk assessment results are used by the Division of Mines in accordance with Section 45.1-161.81 and 45.1-161.82 of the Coal Mine Safety Laws of Virginia to schedule inspection activities and effectively utilize resources of the Department. Underground mines are ranked each six months on January 1st and July 1st using the previous year's data. Surface mines will be ranked on July 1st. Risk ...

Coal in China - Wikipedia

Coal reserves. As of the end of 2014, China had 62 billion tons of anthracite and bituminous, and 52 billion tons of lignite quality coal. China ranks third in the world in terms of total coal reserves behind the United States and Russia. Most coal reserves are located in the north and north-west of the country, which poses a large logistical problem for supplying electricity to the more ...

The spontaneous combustion of coal and its by-products …

01/10/2007· International Journal of Coal Geology, 11 (2) (1989), pp. 143-169. Article Download PDF View Record in Scopus Google Scholar. Hower and Robertson, 2003. J. Hower, J.D. Robertson. Clausthalite in coal . International Journal of Coal Geology, 53 (2003), pp. 219-225. Article Download PDF View Record in Scopus Google Scholar. Hudak, 2002. P.F. Hudak. Spontaneous combustion of …

Effect of the Pore Structure on Adsorption and Diffusion ...

As the degree of coal rank increases, the diffusion coefficient, specific surface area, and fractal dimension all first decrease and then increase later. Then, the diffusion coefficient gradually increases with the increase of the fractal dimension, and there is a positive correlation between the two parameters. It shows that the more complex the pore structure of coal and the rougher the surface, the greater the impact …

Pillar design in coal mines - SlideShare

Coal Pillars Design Approaches: Ultimate Strength: The design determines the strength of a pillar on the basis of its geometry, size and the compressive strength of the material. This approach will compare the expected load of the pillar to its ultimate strength to determine its safety factor value. The main assumption of this approach is that, once the ultimate strength is overcome the pillar will have zero …

Beneficial Use of Deep Ordovician Limestone Water from ...

The use of water from mine dewatering has become increasingly important issue in northern China. Much of this water is discharged to the environment, which wastes a valuable resource and pollutes the ecosystem. To help address this, a feasibility analysis was carried on using deep Ordovician limestone water from dewatering at the Xinglongzhuang coal mine.

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