sandstone mining evaluation

Geologic data collection and assessment techniques

2020-1-1 ensp 0183 ensp The implementation of the methods described above has been proven effective in predicting and mitigating adverse geologic conditions in underground coal mining Consistent re-evaluation of data collection methods geologic interpretations mapping procedures and communication techniques ensures continuous improvement in the accuracy of...

Analysis and Evaluation of Heavy Metal Content in

2019-8-9 ensp 0183 ensp Analysis and Evaluation of Heavy Metal Content in Remixing Soil by Feldspathic Sandstone and Sand in Mu Us Sandy Land China Pang Zhe 1 2 3 4 Li Juan 1 2 3 4 and Wang Qilong 1 Published under licence by IOP Publishing Ltd IOP Conference Series Earth and Environmental Science Volume 300 3 Environmental Engineering and Sustainable Development...

Assessing groundwater quality for drinking water

2020-7-15 ensp 0183 ensp Mining activities are limited to about 2 of the study area mostly concentrated near the Cauvery River where sand and sandstone mining is prevalent A few mining sites are also located in the eastern and southern parts of the study area where predominantly limestone is excavated...

PDF Seismic Exploration of the River Sand Mining Area

2020-7-9 ensp 0183 ensp This content was downloaded from IP address 178 173 254 101 on 09/07/2019 at 18 23...

Strength properties and evolution laws of cracked

2020-3-1 ensp 0183 ensp To study the strength properties and evolution laws of cracked sandstone samples in re-loading tests strength and damage evolution properties of intact sandstone samples were first analyzed through the triaxial compression tests carried on TAW-2000 microcomputer control electro-hydraulic servo rock triaxial test system...

Evaluation and future framework of green mine

2020-6-16 ensp 0183 ensp The idea of green mining was proposed as a practical approach to make the mining industry more sustainable than before Green mining is a contemporary mining model centered on the sustainability of resources environment and socio-economic benefits Its purpose is to develop and apply technologies and processes that increase environmental performance while maintaining...

Evaluation criterion and index for the efficiency of

2019-8-1 ensp 0183 ensp A seepage experiment of CO 2 was carried out in Monash University with the triaxial apparatus see Fig 2 In the experiment Ju et al 2016 coal briquettes were shaped into standard specimen 25 mm in diameter and 50 mm in height from one large coal block from Pingdingshan coalfield There are natural cracks in the prepared coal samples and the cracks are about 5 μ m in...

Weakening Laws of Mechanical Properties of

2019-11-25 ensp 0183 ensp The mechanical properties of rocks are significantly affected by chemical corrosion To explore the influence of chemical corrosion on the weakening laws of sandstone mechanical properties the porosity and pore size distribution PSD of sandstone samples immersed in different chemical solutions was measured by the nuclear magnetic resonance NMR technique...

Direct strain evaluation method for laboratory

2019-8-1 ensp 0183 ensp Based on the generalised crack initiation and propagation thresholds Cai et al 2004 Cai 2011 determined the R f value ranging between 0 1 and 0 3 for most hard rocks in underground excavations It was indicated that the damage coalescence near the peak strength is a major factor influencing the R f value which can also increase up to 0 4 Idris et al 2015 adopted the direct strain...

Evaluation of Fracture Toughness of Sandstone and

2020-6-17 ensp 0183 ensp Success of a hydraulic fracturing operation depends on the height and width of the induced fractures One of the critical components controlling fracture size is fracture toughness of the formation In this work mode I fracture toughness of Berea Sandstone and Mancos Shale is measured by combining semi-circular bend test SCB and digital image correlation DIC...