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Evolution Law of Overburden Longitudinal Connected Fissures in a Shallowly Buried Coal Face with Thin Bedrock
Published 2019-01-01“…To understand the evolution of longitudinal connected fissures and propose method for controlling such fissures, 3-1 Coal of the Jinjie Coal Mine in Shendong Coal Group, China, was used as a case study. …”
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Portable Gas Analyzer Based on Fourier Transform Infrared Spectrometer for Patrolling and Examining Gas Exhaust
Published 2015-01-01“…Aimed at monitoring emission of organic gases such as CH4, C2H6, C3H8, iso-C4H10, n-C4H10, C2H4, C3H6, C2H2, CO, and CO2, from coal mines, petroleum refineries, and other plants, a Fourier Transform Infrared (FT-IR) spectrometer was used to develop a portable gas analyzer for patrolling and examining gas exhaust. …”
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Simultaneous Bilateral Total Knee Arthroplasty in Elderly: Are There Factors that Can Influence Safety and Clinical Outcome?
Published 2022-01-01“…The hospital database was mined searching for patients older than 70 years that underwent SiBTKA for severe bilateral knee osteoarthritis (OA) between 2012 and 2016. …”
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Parameter Optimization of Constant Pressure Grouting Technology for Borehole Sealing with Inorganic Noncondensable Material in Tectonic Coalbed of South China
Published 2023-01-01“…Adopting the constant pressure grouting technology with the slurry, the average drainage concentration of boreholes in Puxi coal mine is 51.5%, and the average gas flow rate is 0.005 m3/min, which are 1.35 times and 1.67 times than those with the cement grouting method.…”
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A Novel Method to Evaluate the Effect of Slope Blasting under Impact Loading
Published 2020-01-01“…The evaluation method proposed in this paper is used to evaluate the postexplosion effect of Zijin Mountain gold-copper mine slope cast blasting. The results demonstrate that the fuzzy normal distribution membership function can correlate the state characteristic information and evaluation index effectively, and the working condition after explosion can be reflected accurately. …”
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Joint Investigation and 3D Visual Evaluation of Rock Mass Quality
Published 2020-01-01“…The research results show the following: (1) The method of storing joint information by close-range photography and extracting joint information by human-computer interaction improves the working efficiency and the process is safe and controllable compared with the traditional method of collecting fracture parameters. (2) Based on the statistical analysis of 97 groups of roadway survey data, the comprehensive statistical regression formula between BQ value of Chinese national standard and RMR value is given, and there is a good correlation between BQ value and RMR value of rock mass quality index. (3) Based on the power-inverse ratio method, the three-dimensional model of rock mass classification of the mine was established, and the cutting model obtained the current distribution diagram of rock mass quality grade, providing scientific reference for drilling, blasting, support, and other production design optimizations.…”
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Characterizing Radon Among Public Buildings and Small/Medium-Sized Businesses in a Canadian Province
Published 2024-12-01“…It has been measured extensively in homes and mines but research in other workplaces has been limited. …”
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Důsledky tzv. Šmalkaldské války z let 1546-1547 pro vývoj měnové integrace Evropy
Published 2008-01-01“…However, during the 1540s the emperor gained his own and very important silver mines in the oversea colonies. That's why his own interests in the Reich turned the scale of the long-termed development and why II. …”
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Macro-Micro Study on Mechanical Properties of Frozen Fine Sandstone Based on DEM Mathematical Model
Published 2022-01-01“…The study of freezing rock mechanical properties is getting more and more urgent because of coal mine construction in western China. Particle discrete element method (DEM) can describe discontinuous medium problem mathematically. …”
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Current issues of normative regulation of combating illegal arms trafficking in Ukraine
Published 2024-03-01“…In particular, it is stated that the current criminal legislation and normative legal acts of the Ministry of Internal Affairs of Ukraine need significant improvement in terms of: 1) defining the concept of “component part of a firearm” or “constructive part of a firearm” and establishing responsibility for their illegal circulation; 2) bringing to a unified interpretation and understanding of the terms “explosive devices”, “explosive substances”, “explosive materials”, delineating the normative grounds for their application and demarcation; 3) development of a unified approach to subject classification and understanding of the legal regime of hand grenades, mines, ammunition for grenade launchers; 4) establishment of the legal regime of trophy weapons, which is relevant in the conditions of martial law and the conduct of hostilities on the territory of our state; 5) determination of the following qualifying signs of committing criminal offenses in the field of illegal arms trafficking: committing a crime under the conditions of the legal regime of martial law, committing a crime by an organized criminal group, etc.…”
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Upper Bound Limit Stability Analysis for Soil Slope with Nonuniform Multiparameter Distribution Based on Discrete Algorithm
Published 2020-01-01“…At the same time, this method takes a dump slope in an open-pit mine as the engineering background, considers the nonuniformity of density, cohesion, and internal friction angle of the slope soil under subsidence, applies upper bound limit analysis to analyze the slope stability, and evaluates the accuracy of analysis results by using the residual thrust method. …”
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Damage Characteristics Caused by Deep-Hole Blasting near Normal Fault and Its Effects on Coal and Gas Outbursts
Published 2022-01-01“…Based on cases of coal and gas outbursts in the Didaoshenghe Coal Mine in Heilongjiang Province, China, an important reason for such incidents is considered to be the blasting areas of normal faults being disturbed by air-powered coal drilling.…”
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Risk Prediction Algorithm of Social Security Fund Operation Based on RBF Neural Network
Published 2021-01-01“…On this basis, the prediction model based on the improved ANT colony-RBF neural network is established, and the MATLAB software calculation tool is used for accurate calculation, which makes the prediction results of coal mine safety risk more accurate and provides more reliable decision basis for decision makers. …”
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Concepts and metrics of clinician attention: a scoping review protocol
Published 2022-06-01“…An initial limited search based on key concepts and terminology will generate relevant articles which in turn will be mined for additional keywords and index terms to guide a formal literature search. …”
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