Management at the enterprise on the basis of ESG principles in the conditions of sanctions pressure by S. A. Bannikov, A. P. Tsypin, P. G. Lakirev

Get full text

Experimental Study on Acoustic Emission and Resistivity Response of Sandstone under Constant Amplitude Cyclic Loading by Kui Wang, Xue Li, Zheng Huang, Mingjie Zhao

“…Therefore, in this paper, the typical sandstone in the Chongqing area is taken as the research object, the AE characteristics and resistivity characteristics of sandstone under different test conditions such as different stress amplitude, different loading frequency, and different saturation are tested, and the evolution of AE is found. …”
Get full text

Experimental Study of Complex Resistivity Characteristics of a Sandstone Reservoir under Different Measurement Conditions by Xinghao Wang, Kui Xiang, Yuanyuan Luo, Gongxian Tan, Jiaju Ruan

“…This study explored a new method of reservoir fluid identification and evaluation based on the complex resistivity response characteristics of sandstone reservoirs under different measurement conditions. …”
Get full text

Investigation of Anisotropic Behavior and Statistical Evolution of Acoustic Emission Energy during the Deformation of Layered Sandstone by Shujian Li, Shaobin Dong, Binting Cai, Menglai Wang, Yanhong Xie, Jingguo Luo

“…To further understand the anisotropic behavior of layered rock and the precursor characteristics of rock mass instability, a series of uniaxial compression experiments using a loading system and an acoustic emission system was conducted on sandstone specimens. The influence of bedding on the mechanical parameters and failure modes and the statistical evolution of the acoustic emission energy were successively discussed. …”
Get full text

Impact of geochemical reactivity on desulphation requirements in a sandstone reservoir containing carbonate and sulphate minerals by Ali M. Al-Behadili, Eric J. Mackay

Get full text

Formation Mechanism of “Large-Area Sweating” Water Seepage from Deep Mine Sandstone Pores by Yanzhi Li, Weiguo Qiao, Yue Wu, Xungang Li, Shuai Zhang, Xiaoli Zhang

“…This study focused on pore seepage in deep mine sandstone to improve the grouting effect. Taking the deep mine sandstone in the southwest Shandong coal field, where “large-area sweating” seepage occurs, as the study object, this study examined the pore structure, petrological characteristics, physical properties, and grain sizes of the sandstone by analyzing experimental data from thin sections and scanning electron microscopy samples. …”
Get full text

The Seepage-Creep Numerical Simulation Model of Coal Measures Sandstone Based on Particle Discrete Element by Wang Liu, Fanfei Meng, Hai Pu, Jian Wang, Guohui Zhang, Qingyu Yi

“…Based on the mechanical results, the crack propagation law of the coal measure sandstone under the mining-induced seepage-creep coupling load was analyzed, and the distribution of pressure gradient in the fluid grid was studied. …”
Get full text

Triaxial Compressive Failure Characteristics and Constitutive Model Study of Jurassic-Cretaceous Weakly Cemented Sandstone by Jinlong Cai, Wei Zou

“…A conventional triaxial compression test of Jurassic-Cretaceous typical weakly consolidated sandstone from a mining area in Ordos, China, was conducted using an MTS816 tester. …”
Get full text

Conservation and restoration of the sandstone stele of Tia found at Deir el-Bahari: a field report by Kacper Prus

Subjects: Get full text

Macro-Micro Study on Mechanical Properties of Frozen Fine Sandstone Based on DEM Mathematical Model by Maoyan Ma, Min You, Shuguang Peng, Biao Zhang, Yuan Lin

“…In order to reveal the mechanical failure mechanism of frozen fine sandstone, the uniaxial compressive strength test of frozen fine sandstone was carried out, and then, DEM was used to simulate the uniaxial test of frozen fine sandstone. …”
Get full text

Saline–CO₂ Solution Effects on the Mechanical Properties of Sandstones: An Experimental Study by Motao Duan, Haijun Mao, Guangquan Zhang, Junxin Liu, Sinan Zhu, Di Wang, Hao Xie

Subjects: “…sandstone…”
Get full text

Acoustic Emission Characteristics and Damage Evolution Analysis of Sandstone under Three-Point Bending Test by Tao Qin, Chen Jiang, Yanwei Duan, Yiwei Wang, Chao Ju

“…In order to study the prevention of roadway roof bending, sinking, and breaking and the prevention of dynamic disasters such as the appearance of rock bursts, three-point bending experiments of sandstone under different spans were carried out. By using stress loading system and acoustic emission technology, the acoustic emission characteristic parameters of the sandstone fracture process were analyzed, the precursory information of rock bending fracture was explored, and the evolution law of sandstone damage based on acoustic emission characteristics was obtained. …”
Get full text

Effect of High Temperature (600°C) on Mechanical Properties, Mineral Composition, and Microfracture Characteristics of Sandstone by Jian Li, Zhao-Wen Du, Zhong-Ping Guo

“…Therefore, in this study, various methods and techniques were integrated to study the changes in mechanical properties, mineral composition, and microscopic fracture characteristics of Sichuan sandstone treated at 600°C. First, the fracture toughness and indirect tensile strength of untreated sandstones and high-temperature treated sandstones were tested by the MTS testing machine, and the double-K model (DKFM) was used to estimate the unstable fracture toughness. …”
Get full text

Numerical Simulation and Sensitivity Analysis of Hydraulic Fracturing in Multilayered Thin Tight Sandstone Gas Reservoir by Hao Zhang, Yuhu Bai, Bingxiang Xu, Xulin Du, Shaohua Gai

“…Hydraulic fracturing is a necessary measurement to realize the commercial exploitation of oil and gas, but its application in multilayered thin tight sandstone gas reservoirs is still not perfect, which usually have thin gas layers mixed with complex intervals, and shows a dramatic variation in geological and geomechanical properties in the vertical direction. …”
Get full text

Laboratory Investigation on Optimum Selection of a Sand Control Method for an Interbedded Sandstone and Mudstone Reservoir by Shaofeng Hu, Lihua Wang, Yishan Lou, Yanfeng Cao, Wenbo Meng, Lei Zhang

“…It is critical to select an optimized sand control method for an interbedded sandstone and mudstone reservoir (ISMR) due to its serious sand production hazards. …”
Get full text

Experimental Study on the Mechanical Properties of Sandstone under the Action of Chemical Erosion and Freeze-Thaw Cycles by Lizhuang Cui, Nan Qin, Shuai Wang, Xuezhi Feng

“…In order to study the mechanical properties of sandstone under the coupling action of chemical erosion and freeze-thaw cycles, the fine-grained yellow sandstone in a mining area in Zigong, China, is collected as the research object. …”
Get full text

Acoustic Emission Characteristics and Energy Evolution of Red Sandstone Samples under Cyclic Loading and Unloading by Tianzuo Wang, Chunli Wang, Fei Xue, Linxiang Wang, Beyene Hana Teshome, Mengya Xue

“…To explore the characteristics of rock deformation and failure under cyclic loading and unloading, the MTS815 rock mechanics test system and acoustic emission (AE) signal acquisition system were used to perform cyclic loading and unloading tests on red sandstone samples. The results showed that, compared with the uniaxial compression test, cyclic loading and unloading had a certain strengthening effect on the strength of the samples. …”
Get full text

Study on Dynamic Mechanical Properties and Failure Mechanism of Sandstones under Real-Time High Temperature by JiaZhi Zhang, Ming Li, Gang Lin, Lianying Zhang, Hao Yu, Kui Di

“…In this paper, the split Hopkinson bar (SHPB) with real-time high-temperature function was adopted to systematically study dynamic mechanical properties of sandstones. The research showed that under the condition of a fixed temperature, with the increase of strain rate, the dynamic compressive strength and dynamic peak strain of sandstone increased gradually, and the variation of dynamic elastic modulus with strain rate was not obvious. …”
Get full text

Mechanism of Damage and Deterioration of Red Sandstone in South China under Different pH Treatments by Shuguang Zhang, Shutian Zhao, Jiaqi Liu, Zhifeng Liu, Dipeng Zhu, Yingbo Li

Get full text

['GEOCHEMISTRY OF PAB SANDSTONE EXPOSED IN LAKI RANGE LOWER INDUS BASIN: PROVENANCE AND TECTONIC IMPLICATIONS'] by Ghulam Mustafa Thebo, Muhammad Hassan Agheem, Akhtar Hussain Markhand, Muhammad Ali Solangi, Muhammad Kashif Samoon, Kashif Ahmed Memon, Muhammad Afzal Jamali

Get full text