Abstract In the mining process of underground metal mines the misjudgment of rock types by on site technicians will have a serious negative impact on the stability evaluation of rock mass and the formulation of support schemes which will result in the loss of economic benefits and potential safety hazards of mining enterprises In order to realize the precise
An intelligent approach for reservoir quality evaluation in tight sandstone reservoir using gradient boosting decision tree algorithm This article focuses on the study of identifying the quality of tight sandstone reservoirs based on machine learning The machine learning method Gradient Boosting Decision Tree GBDT algorithm is used
·We measured several rock index parameters of sandstone as well as their UCS • Several LMR and NLMR models were developed for prediction of UCS • Two intelligent systems ANN and ICA ANN were developed to predict UCS • A comparison between models was made to select the best UCS predictive model
·Tensile and shear fractures are significant mechanisms for rock failure Understanding the fractures that occur in rock can reveal rock failure mechanisms Scanning electron microscopy SEM has been widely used to analyze tensile and shear fractures of rock on a mesoscopic scale To quantify tensile and shear fractures this study proposed
·In 2022 the total output of coal mines in China is billion tons and coal consumption accounts for % of primary energy consumption the future coal will still be the most important
Fuzzy inference system FIS Fuzzy inference is the process of formulating from a given input to an output using fuzzy logic Matlab user s guide 2001 There are two types of fuzzy inference systems including Mamdani and Assilian 1975 and Takagi and Sugeno 1985 Mamdani s method attempts to control a system by synthesizing a set of linguistic
3 ·Potion flasks and crystal flasks are used for herblore potions To get these flasks the rocks have to be mined daily Mine the rocks turn the sandstone into glass and blow the glass into flasks which are tradeable You can use
3 ·Extra fine sand is an item used in the creation of the Orthen furnace core and blessed sand It is made at level 20 Crafting by grinding any size of sandstone The likelihood of receiving extra fine sand scales per kilogram meaning heavier sandstone blocks provide a faster rate of sand
·In order to study the hydration absorption behaviors and characteristics of sandstone in Mogao Grottoes in China the pressure less hydration absorption experiment on the outcrop porous sandstone of Mogao Grottoes was carried out by using the self developed real time monitoring experimental system The hydration absorption was
There are three approved mining methods at McArthur River raisebore mining blasthole stope mining and boxhole mining However only raisebore and blasthole stope mining remain in use Before we begin mining an area we freeze the ground around it by circulating chilled brine through freeze holes to form an impermeable frozen barrier
·Sandstone samples with precracks of different dip angles were collected from a coal mine roof and subjected to uniaxial compression tests and acoustic emission AE and scanning electron
4 ·Sandstone is a solid block commonly found in deserts and beaches underneath sand Red sandstone is a related block associated with red sand Sandstone can be mined with any pickaxe If mined without a pickaxe the block drops nothing Regular sandstone generates in deserts and beaches compressed underneath several blocks of sand
·An intelligent approach for reservoir quality evaluation in tight sandstone reservoir using gradient boosting decision tree algorithm A case study of the Yanchang Formation mid eastern Ordos Basin China discriminant analysis Wang et al 2019 ; iii verification by cluster analysis a set of technique used for data mining or
·The research on well layout optimization of In situ Leaching Mining can be summarized into three categories 1 With the goal of maximizing mine production efficiency the optimal economic well spacing can be calculated by constructing an input‒output model [[11] [12] [13]] 2 Fitting the characteristic curves between leaching parameters with
4 ·Sandstone rocks are a mineable rock requiring level 35 mining and contain sandstone Sandstone rocks are found in the Desert Quarry south of Bandit Camp as well as the Necropolis mine in the Kharidian Desert These areas are subject to desert heat so players mining here need waterskins the circlet of water or the Desert amulet 4 to avoid
·The complex lithology and non homogeneous in this area make it difficult to identify the interlayer so this paper establishes a data driven intelligent identification method of interlayer location and type EEMD is used as an effective signal processing method to achieve deep mining of hidden information of GR curve
·Sandstone groundwater salinization modelling using physicochemical variables in Southern Saudi Arabia Application of novel data intelligent algorithms Visual comparative analysis of the four intelligence based approaches indicates the robust performance of both the linear and nonlinear approaches especially when we compare
·The height of WCFZ in the extra thick coal seam mining in the study area was m forming a water conducting channel of water accumulation in bed separation Its thickness is substantial with a thickness of m It is composed of sandstone and glutenite of various grain sizes with medium to coarse grained sandstone as the
·We measured several rock index parameters of sandstone as well as their UCS • Several LMR and NLMR models were developed for prediction of UCS • Two intelligent systems ANN and ICA ANN were developed to predict UCS • A comparison between models was made to select the best UCS predictive model
Stones such as granite marble limestone and sandstone are widely extracted from mines and quarries to cater to the construction industry s needs The rapid urbanization and infrastructural development in the country are driving the demand for stone mining and quarrying activities 6Wresearch is the premier one stop market intelligence
·The physical and mechanical properties of rocks change significantly after being subjected to high temperatures which poses safety hazards to underground projects such as coal underground gasification In order to investigate the effect of temperature on the macroscopic and microscopic properties of rocks this paper has taken sandstone as
2 ·Smooth sandstone can now be obtained by smelting sandstone 18w50a The textures of smooth sandstone blocks have been changed Bedrock Edition; beta Added smooth sandstone which is obtainable by smelting regular sandstone and can be crafted into smooth sandstone slabs and stairs beta
·Sandstone walls no longer have gaps when stacked vertically Preview The different wall block type block states for the cobblestone wall ID have been split up into their own IDs Decreased the hardness of sandstone walls from 2 to PlayStation 4 Edition; Added sandstone walls The texture of sandstone
·Deadly Sandstone Mines is a brutally difficult map that forces players to skillfully manage resources and combat situations In other words these sandstone mines are deadly Survive in any way you can think of Breaking and placing blocks is encouraged Craft weapons or loot them from chests
·The recent years have witnessed a great success of artificial intelligence applications in geological prospecting so that the traditional manual work which is time consuming and labor intensive could be accomplished automatically or at least in a human machine cooperation way This letter presents a first attempt in proposing an
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