Seasonal and permanent permafrost areas account for nearly 50 % of the world s total land area [1] In cold regions open pit mines tunnels roadbeds and other engineering rock masses are subjected to repeated compression by freezing and expansion force induced by water ice phase change action accompanied by energy dissipation which in turn causes
To better understand the mechanical properties and damage evolution of ice filled preflawed rock a series of triaxial compression tests on frozen red sandstone specimens containing a single
Among them well Y1 is an industrial gas well whose production is 114 300 m 3 per day while the gas production of well Y2 is 8646 m 3 per day The reservoir type in the interval of interest is thin interbed of sandstone and mudstone The cumulative sandstone thickness is 20 25 m for Y1 and approximately 25 m for Y2 respectively
The disintegration of soft rock in water is an important cause of engineering disasters and the research on the disintegration characteristics is also of great significance for the design and production practice of major projects Considering this a series of slake durability experiments were conducted to explore the disintegration behaviours of red sandstone under
The Sichuan Basin in China is one of the most concentrated areas of red beds in China In the red bed area abundant rainfall can easily cause natural disasters such as landslides mudslides collapses and subsidence This has had a great impact on the safety of people and property and sustainable modernization in the area Zhongjiang County of Sichuan
Information about the Red Sandstone Stairs block from Minecraft including its item ID spawn commands crafting recipe block states and more Find thousands more items on our complete list of 1 325 Minecraft IDs Show Me Rock Diggable Yes Min / Max State IDs 8220 8299
The Red Rock Canyon in Nevada USA where it forms stunning red sandstone cliffs and rock formations The Scottish Highlands where it forms rugged mountain landscapes The Great Australian Bight in Australia where it forms sea cliffs and coastal formations The Karoo Basin in South Africa where it forms thick sedimentary sequences
In order to study the mechanical behavior and failure characteristics of rock mass with the structural plane in complex deep stress environment the QKX YB200 true triaxial rockburst test system acoustic emission and digital video recorder were adopted to conduct true triaxial loading and unloading indoor tests on the red sandstone cube specimens
The permeability of the tight sandstone reservoirs will change when the thermal equilibrium in geological formations is disturbed Understanding the permeability evolution under different temperature levels is thus crucial to reservoir evaluation and production prediction In this study a series of coupled thermal hydraulic mechanical triaxial flow through tests are
Abstract As a potential reservoir stimulation fracturing fluid carbon dioxide CO2 offers significant advantages in enhancing the recovery of hydrocarbon resources and reducing reservoir damage Sparse sandstone reservoirs are often plagued by problems such as low recovery rates and severe reservoir damage necessitating stimulation to improve flow
The rock pressure test system and acoustic emission equipment were used to carry out uniaxial loading and acoustic emission monitoring tests on fractured red sandstone
Short term and creep tests for saturated red sandstone under different pore pressures were carried out by a rock servo controlled triaxial equipment Based on the experimental results the influences of confining pressure and pore pressure on short term mechanical behavior of red sandstone are firstly analyzed integument Red sandstone
The newly built shaft in the western region needs to pass through the deep Cretaceous stratum where the pores and fissures are developed the cementation ability is poor and the surrounding rock is rich in water Under the coupling effect of the stress field and seepage field the surrounding rock is easy to deteriorate and loses stability The hydraulic coupling test
As an unconventional reservoir tight gas sandstone TGS reservoirs of the Ordos Basin China have produced large amounts of hydrocarbons Zou et al 2015; Du et al 2018 As explorations and developments for TGS reservoirs move toward the margin regions of the Ordos Basin where the region investigated in this paper is located quantitative reservoir
The rock mass is a complex product formed through geological processes and transformations and its physical and mechanical properties are not solely determined by its structure but influenced by the surrounding environment [6] Compared with the oil immersed situation there are more cases of rocks affected by water [7] [8] and more related research
By means of long term settlement observation of DC section K212 475 and ordinary section K180 655 the effectiveness of the red sandstone soil rock mixture embankment in the DC section K212
Water content and primary fractures can change the mechanical characteristics of rock making it easy to induce geological disasters Therefore direct shear tests of red sandstone under the action of water fracture were carried out in this paper The results show that shear strength of rock samples with fractures is less than that of intact rock samples With the
Weakening rocks using microwave irradiation has been a major topic in research for the past 50 years However the thermal effect of microwaves on rocks is mostly studied with a multi mode metal
The basic parameters of the red sandstone specimens are presented in Table 1 Based on the method of drilling holes in intact rectangular rock specimens suggested by relevant scholars Han et al
The rock pressure test system and acoustic emission equipment were used to carry out uniaxial loading and acoustic emission monitoring tests on fractured red sandstone
