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Gypsum is widely used in the construction sector, and its worldwide consumption has been increasing for several decades. Depending on the lifetime of the used gypsum products, an increase of gypsum in construction and demolition waste follows. Especially against the background of a circular economy, the recycling of waste gypsum …
This study aims to bring elements of understanding of water-gypsum interactions in situ to better assess the development of dissolution cavities in areas where gypsum is present at depth. Different types of natural gypsum facies are tested, impure alabaster, sacharoidal and clay/carbonate matrices gypsum. An experimental protocol is …
Gypsum is indispensable to cement as it regulates the setting time of cement and impacts its strength. We look at the various aspects of sourcing and processing of gypsum that makes this retarding agent of cement an important component in the manufacturing process while being a sustainable ingredient. Gypsum is a soft sulphate …
In this study, the age group found to receive the highest dose—and to be at highest risk for adverse health effects—was children at the age of 1 year. Furthermore, the inhalation dose and health risks are 1.4 times higher for actual mine workers when they are in the mine areas than for persons in non-mining, areas.
Calcium Sulphate Dihydrate (Gypsum) is commonly hydrated by groundwater. The UK is largely self-sufficient in gypsum. The material can be found in seams in the Pennines and the Midlands, but the biggest source of extraction is in East Sussex where mining extracts some 100,000 tonnes of gypsum a year from 100 m below the High Weald.
Producers of gypsum plasters, that use the requirements specified in EN 13279-1 to assess and verify the constancy of the performance of the offered products, have the option to declare up to two groups of gypsum plasters: gypsum plasters—B or gypsum plasters for special purposes—C. Types of gypsum plasters, according to EN 13279-1, …
Uranium (U) contamination in groundwater of the uranium mines exploited using the in situ leaching (ISL) technology (also referred to as the ISL uranium mines) has attracted wide international attention. Since the adsorption of U in groundwater by aquifer media influences the migration scope of U, understanding the U adsorption by aquifer …
University of Wisconsin–Eau Claire
An abandoned gypsum mine has been discovered beneath the route of a highway construction in Hunan province, south China. Due to the highway construction and operations safety, there is an urgent need for a comprehensive stability analysis of the abandoned mining area. The 3D laser scanning detection technique has been adopted, …
The manual replaces the previous version (SP32) that was published 35 years ago and covers the impacts of mining activity, planning legislation and regulation, appropriate site investigation and techniques of ground treatment and construction design. It represents a major contribution towards the knowledge and record of the mining legacy …
LITTLE NARROWS, NS — CGC Inc., the Canadian division of USG Corporation, today announced plans to revitalize and relaunch a state-of-the-art gypsum quarry in Little Narrows, Nova Scotia. This CAD 104 million investment will reinforce CGC's supply of raw gypsum material—the largest in the world— to meet the growing demand …
The room-pillar mining technology of underground gypsum resources results in numerous gypsum rock pillars for controlling and supporting mined gobs, which forms a large area of roof hanging gobs. Owing to weathering and mining activities, gypsum rock pillar damage and failure will occur, thereby inducing a large area of …
Based on our study, gypsum mining spoil appears to have positive effects on the remediation of soils polluted with PHEs and the recovery of their vegetation. The …
However, there are few research results related to gypsum mines in the field of rock dynamics. Based on the deposit and production characteristics of gypsum ore, the dynamic impact test of gypsum rock was conducted, and the FEM based on the RHT dynamic constitutive model was established.
Genotoxic impact, i.e. the level of primary DNA damage in haemocytes, was also investigated, since gypsum mining activities result in wastewaters contaminated with heavy metals. For this purpose, water and sediment samples and amphipods were collected at a site downstream from a gypsum mine, in the Kosovčica River, and at a reference …
Industrial mining projects can play an important role in global sustainable development if associated health risks are minimised and opportunities maximised. While a broad body of evidence from quantitative studies exists that establishes the interlinkages between mining operations and effects on public health, little research has been …
The impacts of quarrying of the gypsum deposits on the environment at Maqna, Tabuk, were evaluated by intensive field studies including in situ testing, mapping and sampling of gypsum and well water. Field and laboratory tests were made to determine the engineering properties including tensile and compressive strengths, unit weight, …
Florida Department of Environmental Protection. There are 27 phosphate mines in Florida, covering nearly half a billion acres. Phosphate pebbles were found in the Peace River in the 1880's, setting off a mining rush where Hardee, Hillsborough, Manatee, and Polk counties meet. "Bone Valley" was named for the large number of prehistoric …
However, mining can have considerable impacts on freshwater ecosystems. Here, we present the ecological damage inflicted by mine water originating from the massive Terrafame Talvivaara polymetal ...
The impacts of quarrying of the gypsum deposits on the environment at Maqna, Tabuk, were evaluated by intensive field studies including in situ testing, mapping and sampling of gypsum and well ...
Because many mines with disturbed entrances remain hidden, various methods of their detection are reviewed, which are essential to prevent loss of life and damage due to their eventual collapse. The most prominent manifestations of the presence of abandoned underground mines are dynamic deformations along with slower subsidence.
Gypsum mining can lead to various environmental impacts. The extraction process often involves clearing large areas of land, resulting in habitat destruction and loss …
The study looks at the economic, social and environmental impacts of the gypsum mining on people living nearby as well as at the national level. However, given the non …
The Mining Advocacy Network (Jatam), an Indonesian NGO, says 104 mining concessions, covering a combined area of 1.6 million hectares (3.9 million acres) — half the size of Belgium — are ...
Objective: To investigate the health of gypsum miners in Hubei province and analyze the health effects of occupational disease hazards exposure on gypsum miners.Methods: In April 2017, occupational disease hazard factors were tested on the site of a gypsum mine, and 500 workers were selected by random sampling to conduct …
impacts of mining (Matthews, 2000). The above are the general problems of mining which this project seek to address. Whether mining gypsum in selected Communities of Fika Local Government Area of Yobe State is associated with all these problems is going to be the outcome of this research work.
The mineral resources of Cyprus include copper, gypsum, asbestos, chromite, sand, stone, lime, and umber. The combined gross production of the mining and quarrying sectors in 2010 was valued at €90.4 million. …
Gypsum is a soft mineral, that is relatively soluble in water. The water solubility is affected by temperature ... The impacts of mining on surface are usually from tailings and rock dumps, these impacts undesirably affect the …
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Web"Gypsum mining can lead to destabilizing slopes [and] that can lead to soil erosion. [The] water table gets affected." He adds that the population in and around the …
The U.S. Energy Information Administration estimates (as of October 2022) that in 2021, CO 2 emissions from burning coal for energy accounted for about 20% of total U.S. energy-related CO 2 emissions and for nearly 60% of total CO 2 emissions from the electric power sector. In the past, fly ash was released into the air through the …
The spodumene moves to a dryer and kiln that operate at about 1,000°C. This process converts the mineral into an easy-to-extract form using acid. This stage in the process also has the potential to release chemicals in the environment, some of which can be attributed to the fuel quality, calciner design, and emission abatement steps.
Mining and mineral exploration has many effects on the surrounding environment. The present study reviews the hydrological and environmental impacts of coal and nonmetal mining operations by mine lifecycle stages and facility patterns. Further, a critical review of regulations and policies in South Korea focusing on the mining-water …
