sandstone mining in china
Study on CBM and tight sandstone gas co-mining feasibility …
Unconventional gas resources, including a large proportion of coal bed methane (CBM) and tight sandstone gas, are abundant in China. Presently, there is an issue of low production and high cost in single-layer mining of CBM and tight sandstone gas. Co-mining of CBM and tight sandstone gas has received extensive attention. …
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Experimental investigation of the microstructural evolution …
The coal-bearing strata in the Ordos Basin, China, formed in the Jurassic, and the associated sandstone aquifer is characterized by a short diagenesis time and weak cementation. Affected by seepage erosion, interstitial materials migrate inside the sandstone formation, resulting in changes in porosity and permeability over time and …
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In-situ stress measurements and stress distribution characteristics …
For example, the mining depth in some coal districts in Western China is in the order of tens of meters, while in Eastern China, it can reach up to 1400 m. The depth of mine operations and the in-situ stress distribution control the ground deformation and failure mechanisms in the near field rock mass surrounding the openings within the various ...
ادامه مطلبChina Quality Stone Supplier, Sandstone, Marble, …
Beijing Yatianli Stone Company, founded in 2002, is located in Beijing, the capital of China, and has self-own large-scale mining resources in Shanxi Province. It is a comprehensive stone processing enterprise integrating …
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Discrimination of water-inrush source and evolution analysis …
The Linhuan mining district (Fig. 1) is located in the northern part of Anhui province, China and is 50 km long from north to south, and 25–45 km wide from east to west, covering an area of 1750 km 2 (Chen et al. 2017).This area is covered by thick loose layer of paleogene, neogene and Quaternary, and the basement is composed of the late …
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Mineral Composition and Full‐Scale Pore Structure of …
In situ leaching (ISL) is becoming the main mining practice for sandstone-type uranium deposits in China. The key to ISL technology is to aid the leaching solution …
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Pollution Characteristics and Spatial Distribution of Heavy
Soil pollution in coal mining areas is a serious environmental problem in China and elsewhere. In this study, surface and vertical profile soil samples were collected from a coal mine area in Dazhu, Southwestern China. Microscopic observation, concentrations, chemical speciation, statistical analysi …
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Erosion characteristic of slope sandstone soaking in acid mine …
Acid mine drainage(AMD) is one of the main reasons of slope instability in chemical mines with high sulfide. The pH values of the solution inside the mining pit decrease with the increasing of distance from ore body and vary from 1.2 to 4.6, according to the results of the water environmental investigation and the composition test of the …
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Stone Mining And Quarrying Market Size, Industry Share
The sandstone segment is also expected to grow significantly due to its widespread use in aggregates for building constructions, railroad beds, and highways. Based on the type, the global market is classified into dimension stone mining and crushed stone mining. The crushed stone mining segment accounted for the major share in the market.
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An Improved Potential Groundwater Yield Zonation …
yield in mining areas is an important factor influ-1School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China. 2School of Earth Science and Engineering, Hebei University of Engineering, Handan 056038, China. 3To whom correspondence should be addressed; e-mail: [email protected] 849
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Metallogenic characteristics and models of sandstone-type …
The exploration and development of sandstone-type uranium deposits in China started late – from the 1950 s, and did not make any breakthrough until 1998 when the in-situ leachable Kujiertai uranium deposit was discovered in the Yili Basin (Jin & Teng, 2022).According to the latest uranium evaluation, the uranium resources in China are …
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Geo-Environmental Models of In-Situ Leaching …
A conceptual model of the geo-environment for sandstone-type uranium in northern China was described, which covers the changes in the geo-environmental characteristics in the natural state, in the …
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A growing sandstone type uranium district in South Yili Basin, NW China
The Mesozoic Yili Basin of NW China represents the largest known concentration of U deposits in China and contains five major deposits, namely (from west to east) the 512 (Kujie'ertai), 513, 511, 510 (Mengqiguer), and 509 deposits. Pre-mining resources within the explored sandstone-type uranium deposits in this area are …
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Environmental Impacts of Sandstone Quarrying and Its …
China. Water. 7 (1), 116-131. Citations (2) References (21) ... Sandstone mining leads to Silicosis and TB due to negligence and not taking precaution during work. Large sample size studies will ...
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Predicting sandstone water abundance using seismic …
Using seismic dispersion attribute inversion and the frequency slice wavelet transform method, we predicted the water abundance of sandstone in the coal seam roof of the Yuwang coal mine in Yunnan ...
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Soil Reclamation Models by Soil Water Infiltration for Refuse …
Coal mining in the opencast mines of Shanxi-Shaanxi-Inner Mongolia energy circle in China produced large amounts of refuse dumps which heavily damaged the landscape, covered large areas of land, and generated many environmental problems, such as the high risk of soil erosion caused by winds or precipitations, making land …
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Minerals | Special Issue : Green Mining of Coal Mine in China …
More than 20 years of studies on green mining in China have witnessed theoretical and technological progress in water-protective mining, co-extraction of coal and gas, surface subsidence mitigation, mine waste reducing and recycling, mine dust control, etc. ... sandy mudstone, and sandstone under mining-induced stress and constant …
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Petrology, mineralogy, and ore leaching of sandstone-hosted uranium
These discoveries have helped China move from 3rd to 1st in reserves of sandstone-hosted uranium deposits (OECD-NEA/IAEA, 2014). ... 2019). Likewise, the economical and environment-friendly in-situ leach uranium mining technique for sandstone-hosted uranium deposits has also been a popular scientific issue (Su et al., …
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Geo-Environmental Models of In-Situ Leaching …
Since the 1990s, sandstone-type uranium in the northern basin of China has become the main target for mining. Uranium mining can cause a series of impacts on the environment. A conceptual model …
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Model of cross-flow interference index and application for …
The Sulige tight sandstone gas field represents a quintessential example of a tight sandstone gas field and boasts the largest reserves and production scale in China [[1], [2], [3]].In this region, effective sand formations exist as isolated lenses in the geological, with a limited range of sand connectivity, spanning less than 800 m.
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Uranium-Bearing Layers of Sandstone Type Uranium …
vertical spatial occurrence characteristics, resource prediction, exploring and mining of sandstone type uranium deposits. 2. Geological Setting Ordos Basin is a part of the North China Craton, which formed on the basis of the North China Craton with an extension of 2.5105 km2 [30] and contains abundant energy
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Sustainability | Free Full-Text | Effect of W-OH Material on …
The Pisha sandstone is a general appellation in China for a type of fluvial clastic deposition sandstone formed during the Jurassic, Triassic, and Cretaceous periods [1,2].It is widely distributed in an adjacent region close to Shanxi, Shaanxi, and Inner Mongolia autonomous region, covering an area of approximately 16,700 km 2 [3,4].It is …
ادامه مطلبOccurrence characteristics of uranium mineral-related …
At present, in-situ leaching is primarily used in the mining of sandstone type uranium deposits in China, while heap leaching is often used in hard rock type uranium mining. In-situ leaching tends to pollute deeper sediments and aquifers, while heap leaching is easier to pollute surface or near surface soil and water.
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A GIS-based model of potential groundwater yield zonation for …
Because the hydrogeological studies lagging the geological exploration during the mining activities, a GIS-based the geological, tectonic and lithological composition index model is put forward to evaluate the groundwater yield zones in the sandstone aquifers in the coal basin.. Variation coefficient of slope of coal seam, intensity index of …
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Mineral Composition and Full‐Scale Pore Structure of …
In situ leaching (ISL) is becoming the main mining practice for sandstone-type uranium deposits in China. The key to ISL technology is to aid the leaching solution in contacting the ore bed over a large range, which will induce a series of chemical reactions to extract uranium; thus, it is essential to thoroughly understand the reservoir physical …
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Fine detection on water abundance of sandstone by joint …
The Ningdong mining area in the western Ordos Basin, China, mainly mines coal seam in Yan'an group, where its overlying rock is a thick sandstone layer of the Middle Jurassic Zhiluo Formation.
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Sand mining: how it impacts the environment and solutions …
Soaring demand for construction means sand mining is impacting the environment and needs regulating. Forum Institutional Sand mining is close to being an environmental crisis. ... Five things to know about the 'Summer Davos' in China. Gayle Markovitz. June 28, 2024. 3:49. These 5 facts about climate change need more …
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Indications of sandstone-type uranium mineralization from …
Sandstone-type uranium (SU) deposits are mainly developed in sandstones in Mesozoic and Cenozoic sedimentary basins (Kang et al. 2020). They have become …
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Predicting sandstone water abundance using seismic …
Using seismic dispersion attribute inversion and the frequency slice wavelet transform method, we predicted the water abundance of sandstone in the coal seam roof of the Yuwang coal mine in Yunnan Province, China. The predicted sandstone water abundance was compatible with the actual water‐rich scenario observed in well logs and …
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Effects of wetting/drying cycles on pore characteristics in sandstone …
The microstructure and appearance of sandstone samples from the bank slope of the Three Gorges Reservoir of the Yangtze River in Wanzhou District, Chongqing, China were evaluated before and after wetting/drying cycles in aqueous solution using nuclear magnetic resonance spectroscopy, scanning electron microscopy and energy …
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