Sandstone Mining Evaluation
Evaluation of seismic potential in a longwall mine with …
Evaluation of seismic potential in a longwall mine with massive ... ... CDC Logo ...
Study on CBM and tight sandstone gas co-mining feasibility …
A comprehensive evaluation index is established and used to judge the co-mining feasibility of 14 wells (J-1 to J-14) in the No. 8 coal seam and adjacent sandstone layers in the Linfen block. Results show that with increasing ratio of permeability, ratio of porosity, and ratio of reservoir thickness (sandstone/coal), the accumulative gas ...
In situ recovery, an alternative to conventional methods of mining …
Provinces with sandstone roll-front uranium deposits amenable for ISR mining were discovered in the 1970s and 1980s on almost all continents (Kazakhstan, Uzbekistan, Australia, China, Russia, USA, and other countries). ... A scoping study or preliminary economical assessment is an early stage evaluation of a mining project. …
Evaluation of white sandstone mechanical behaviour …
Evaluation of white sandstone mechanical behaviour and the energy evolution ... mining have become the hotspots and diculties in domestic and foreign research 4,5. Experts and scholars at
Dilation and energy evolution mechanisms of sandstone …
The study of sandstone dilation characteristics under actual mining and excavation conditions promotes the safe and efficient development of underground engineering. Accordingly, this study employs true-triaxial testing to reveal the influence of intermediate principal stress and unloading action in the minimum principal stress …
Mitigation and evaluation of the impact of a sandstone …
A nearly 305-m- (1,000-ft-) wide sandstone channel was projected to run through the mid panel area of a 457-m- (1,500-ft-) wide longwall panel in a southwestern Pennsylvania coal mine. This sandstone channel was known to cause serious longwall-face roof control problems in the mine's B-panel area in 1998 and 1999; and most recently, it ...
Evaluation of seismic potential in a longwall mine with …
Within the mining area, 897 geophysical logs, 224 core holes, and 1031 fiberscope holes were examined by mine geologists. From this information, it was found that overburden thickness, sandstone thickness, and sandstone quality contributed greatly to …
Evaluation of seismic potential in a longwall mine with …
A case study performed by Van Dyke et al. (2018) found in a ia (United States) longwall mine that sandstone thicknesses of 6-12 m combined with an overburden of about 580 m or greater ...
Quantitative evaluation of unconsolidated sandstone heavy …
Sandstone thickness and pore structure were the most important parameters that affected reservoir quality. Among various machine learning algorithms, XGBoost …
SP-02 Prevalence of silicosis in stone carving and sandstone mining
Conclusions The prevalence of silicosis in stone carving and sandstone mining is much higher than generally believed and it higher in stone carving than sandstone mining. There is urgent need to adopt dust control measures to prevent silicosis.
Quantitative Evaluation of Tight Sandstone Reservoirs …
Request PDF | Quantitative Evaluation of Tight Sandstone Reservoirs Based on Data Mining Using MICP Data | Tight sandstone reservoirs have become a highlight of unconventional oil and gas ...
Evaluation method of tight sandstone reservoir saturation …
Saturation evaluation plays a crucial role in reserve evaluation and productivity prediction in tight sandstone reservoirs. However, due to the complex pore structure and strong heterogeneity of tight sandstone reservoirs, the electrical response characteristics of rocks in these reservoirs are more complex than those in conventional reservoirs ...
Application of fuzzy analytic hierarchy process in sandstone …
Accurate evaluation of water yield property is the foundation of mine water inrush risk analysis, and is also an important prerequisite for engineering measures selection. There are many factors or parameters that influence the ability of sandstone aquifers to store and transmit water.
Thermal conductivity models of sandstone: applicability evaluation and
The thermal conductivity (TC) of rock has a general application in safety assessment and engineering optimization of deep geological engineering practices such as geothermal mining and nuclear waste disposal. Determining the TC of rock by using a TC model is a convenient and effective method for such evaluation, and selecting a suitable TC model …
St. Peter Sandstone Mineral Resource Evaluation, …
Mining The St. Peter Sandstone was first mined in Missouri in the 1870s for glass sand. Early mining was conducted at the surface and underground, and was ... St. Peter Sandstone Mineral Resource Evaluation, Missouri, USA 5 isochore map with contours illustrating the drill thickness of the formation at 50-foot intervals. The
Evaluation and analysis of sandstone brittleness under …
Evaluation and analysis of sandstone brittleness under the influence of temperature Weijing Xiao . Dongming Zhang . ... State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing ...
CDC
Mining Publication: Evaluation of Seismic Potential in a Longwall Mine with Massive Sandstone Roof Under Deep Overburden. Keywords: ... In order to use the geology as a forecaster of mining-induced seismic events and their energy potential, two primary components are needed. ...
Evaluation of Seismic Potential in a Longwall Mine with …
Evaluation of 2152 geological data points and modeling ... Three underground seismic sensors placed in the sandstone just above mine level were incorporated into an existing network of seven sensors already operating at surface loca-tions surrounding the activity of a longwall mine. Diculty
Quantitative evaluation of unconsolidated sandstone heavy …
We have established a classification and evaluation system for unconsolidated sandstone heavy oil reservoirs considering the change of crude oil viscosity. On this basis, the machine learning method ...
Evaluation of seismic potential in a longwall mine with …
Within the mining area, 897 geophysical logs, 224 core holes, and 1031 fiberscope holes were examined by mine geologists. From this information, it was found that overburden thickness, sandstone thickness, and sandstone quality contributed greatly to seismic locations. After the data was analyzed, a pattern became apparent indicating that the ...
Sandstone Gold Project
Alto's Sandstone Gold Project covers 900km² of the Archaean Sandstone Goldfield 600km north of Perth in the East Murchison Mineral Field of Western Australia.
Evaluation of Thermophysical and Mechanical Properties of Sandstone …
In this study, thermophysical and mechanical tests were conducted on sandstone samples from room temperature to 1000 °C. Based on the test results, the thermophysical properties (such as specific heat capacity, thermal conductivity, and thermal expansion coefficient) of sandstone after high-temperature treatment and the variations …
Evaluation method of tight sandstone reservoir saturation …
The results demonstrate that a good linear correlation between the PFE of the tight sandstone reservoirs and water saturation, and the new saturation evaluation model …
Evaluation of Seismic Potential in a Longwall Mine with
The first sandstone (SS1) and second sandstone (SS2) are generally higher up from the roofline when compared to the Right panels. The SS1 and SS2 thicken at …
Prediction Model of Water Abundance of Weakly Cemented Sandstone …
At present, in the vast majority of coal mine production processes in China, the degree of hydrogeological exploration often lags behind geological exploration. The main difficulty in evaluating the water richness of coal seam top and bottom water-bearing beds is that the existing evaluation methods often rely on less hydrogeological …
Experimental study on mechanical behavior, AE response
Experimental study on mechanical behavior, AE response and energy evolution of fissure-filled sandstone from mine roadway under conventional triaxial compression
Entropy Evaluation Method for Sandstone Uranium Reservoir
In this work, we propose a spatial information entropy calculation method based on a convex hull search strategy to quantitatively evaluate the geological …
A hyperspectral evaluation approach for quantifying salt …
Here, we propose a hyperspectral evaluation method for quantifying salt-induced weathering on sandstone surfaces in laboratory tests. Our novel approach consists of two parts: data acquisition of microscopic observations of sandstone in salt-induced weathering environments, and machine learning technology for a predictive model.
Applied Sciences | Free Full-Text | A Comprehensive …
One type of seepage water that is difficult to plug by grouting is the water exuding through the pores of sandstone in deep underground engineering. Aiming at this problem, this paper collected deep-mine sandstone samples from the Southwest Shandong coalfield, studied the sandstone pore structure and its influential factors by …
A novel reservoir classification method for sandstone …
This study utilizes a multi-scale digital rock scanning technique, employing micro-CT scanning (at resolutions of 35 μm and 2 μm) and SEM scanning (at …
Reformability evaluation of blasting-enhanced permeability …
It is essential to evaluate the blasting-enhanced permeability (BEP) feasibility of a low-permeability sandstone-type uranium deposit. In this work, the mineral composition, reservoir physical properties and rock mechanical properties of samples from sandstone-type uranium deposits were first measured. Then, the reformability evaluation method …
Influence of dynamic load and water on energy …
Experimental methods. The study initiated with dynamic load impact tests performed on dry sandstone, saturated sandstone, and natural sandstone, utilizing different bullet velocities (4, 8, 12 m/s).
Challenges and opportunities for silicosis prevention and …
Rajasthan's mining sector is home to roughly 30,000 mines that reaps sandstone, marble, and granite . These mines are spread across several districts of Rajasthan and employ nearly 3 million workers and another 3.2 million are employed in the construction industry [18, 19].
Damage evaluation and precursor of sandstone under the …
In this study, the relationship of the strain-field heterogeneity and damage evolution of three sandstone specimens under the uniaxial compressive load was analyzed statistically. The acoustic emission (AE) and two-dimensional digital image correlation were employed for real-time evaluation of the AE parameters and strain-field heterogeneity.