Archives of Mining Sciences最新文献_第9页

Assessment of The Impact of Blasting Works on Buildings Located in the Vicinity of Open-Pit Mines Using Matching Pursuit Algorithm 基于匹配寻踪算法的露天矿附近建筑物爆破影响评价

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/AMS.2020.133187

A. Sołtys

引用次数: 0

Effects of Initial Damage on Time-Dependent Behavior of Sandstone in Uniaxial Compressive Creep Test 单轴压缩蠕变试验中初始损伤对砂岩时间特性的影响

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/AMS.2019.129377

R. Hou, Kai Zhang, Jing Tao

{"title":"Effects of Initial Damage on Time-Dependent Behavior of Sandstone in Uniaxial Compressive Creep Test","authors":"R. Hou, Kai Zhang, Jing Tao","doi":"10.24425/AMS.2019.129377","DOIUrl":"https://doi.org/10.24425/AMS.2019.129377","url":null,"abstract":"Time-dependent behavior of rock mass is important for long-t erm stability analysis in rock engineering. Extensive studies have been carried out on the creep properties and rheological models for variable kinds of rocks, however, the effects of initial damage state on the time-dependent behavior of rock has not yet been taken into consideration. In the present study, the authors proposed a cree p test scheme with controlled initial damage to investigate the influence of initial damage on the time-dependent behavior of sandstone. In the test scheme, the initial states of damage were first determined via unloading the specimen from various stresses. Then, the creep test was conducted under different stress levels with specific initial damage. The experimental results show that there is a stress threshold for the initial damage to influence the behavior of the rock in the uniaxial compressive creep tests, which is the stress threshold of dilatancy of rock. When the creep stress is less than the stress threshold, the effect of the initial damage seems to be insignificant. However, if the creep stress is higher than the stress threshold, the initial damage has an important influence on the time-dependent deformation, especially the lateral and volumetric deformation. Moreover, the initial damage also has great influence on the creep failure stress and long-term strength, i.e., higher initial damage leading to lower creep failure stress and long-term strength. The experimental results can provide valuable data for the construction of a creep damage model and long-term stability analysis for rock engineering.","PeriodicalId":55468,"journal":{"name":"Archives of Mining Sciences","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44440646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

An Economic Evaluation of the Functioning of Hard Coal Mining in Poland in the Years 2016-2018 2016-2018年波兰硬煤开采运行的经济评价

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2020.134141

P. Krawczyk, A. Śliwińska

{"title":"An Economic Evaluation of the Functioning of Hard Coal Mining in Poland in the Years 2016-2018","authors":"P. Krawczyk, A. Śliwińska","doi":"10.24425/ams.2020.134141","DOIUrl":"https://doi.org/10.24425/ams.2020.134141","url":null,"abstract":"This work is a continuation and extension of previous socio-economic analyses of hard coal mines, which were conducted at the Central Mining Institute in the years 2013-2015. The paper presents the results of the economic evaluation of the hard coal mining sector in the years 2016-2018 using the Cost-Benefit Analysis (CBA) methodology. Used for the socio-economic assessment of hard coal mining, the CBA methodology enables the comprehensive evaluation of the functioning of this sector of the economy in Poland. In addition to financial aspects, which are important from the point of view of coal companies, it also included the social and environmental influence resulting from the impact of mines on the environment. Direct data of operating costs and payments (including pub lic-law payments), incurred by the hard coal mining industry in Poland, was used. This data is obtained by Industrial Development Agency JSC, Branch Office Katowice as part of the “Program of statistical surveys of official statistics” – statistical survey “Hard coal and lignite mining industry”. They were supplemented with data coming from commonly available public statistics. For the analysed period the presented results indicate that the financial and social benefits resulting from the hard coal mining activity in Poland outweighed the financial, social and environmental costs generated by this industry. This confirms the desirability of further functioning of the hard coal mining industry in Poland, however, assuming effective restructuring activities that will result in lower costs of coal production.","PeriodicalId":55468,"journal":{"name":"Archives of Mining Sciences","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44592680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Experimental and Theoretical Study on the Dynamic Ejection Process of a Rock Burst Under a Static Load 静载荷作用下冲击地压动态抛射过程的实验与理论研究

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2021.136691

Weiyu Zheng

引用次数: 0

Field Experiment of Destress Hydraulic Fracturing for Controlling the Large Deformation of the Dynamic Pressure Entry Heading Adjacent to the Advancing Longwall Face 临近推进长壁工作面动压巷道应力水力压裂控制大变形现场试验

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2019.131069

Bing-xiang Huang, Xinglong Zhao, T. Sun

{"title":"Field Experiment of Destress Hydraulic Fracturing for Controlling the Large Deformation of the Dynamic Pressure Entry Heading Adjacent to the Advancing Longwall Face","authors":"Bing-xiang Huang, Xinglong Zhao, T. Sun","doi":"10.24425/ams.2019.131069","DOIUrl":"https://doi.org/10.24425/ams.2019.131069","url":null,"abstract":"Influenced by the dynamic pressure of the front abutment pressure and the lateral abutment pressure, large deformation of surrounding rock occurs advancing working face in the entry heading adjacent to the active longwall mining face. Based on the cause analysis of entry large deformation, a new technology was put forward to solve the problem, and the designing method of drilling hole parameters for directional hydraulic fracturing was formed. Holes are drilled in the entry or in the high drainage entry to a certain rock layer over the adjacent working face, hydraulic cutting or slotting at the bottom of a borehole were also applied in advance to guide the hydraulic fractures extend in expected direction, through which the hard roof above the coal pillar can be cut off directionally. As a result, the stress concentration around the entry was transferred, and the entry was located in a destressing area. The field test at Majialiang coal mine indicates that the propagation length of cracks in single borehole is more than 15 m. After hydraulic fracturing, the large deformation range of the entry is reduced by 45 m, the average floor heave is reduced by 70%, and the average convergence of the entry’s two sides is reduced by 65%. Directional hydraulic fracturing has a better performance to control the large deformation of the dynamic pressure of the entry heading adjacent to the advancing coal face. Besides, it can improve the performance of the safety production.","PeriodicalId":55468,"journal":{"name":"Archives of Mining Sciences","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44067953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Variability of Exploitation Coefficient of Knothe Theory in Relation to Rock Mass Strata Type Knothe理论开采系数随岩体地层类型的变异性

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/123696

K. Kryzia, T. Majcherczyk, Z. Niedbalski

引用次数: 0

Innovative Technology of Tight Liquidation of Workings on the Example of the Wieliczka Salt Mine 紧密清理工作的创新技术——以维利奇卡盐矿为例

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2021.136688

引用次数: 0

FUNCTIONAL DEPENDENCIES OF THERMODYNAMIC AND THERMOKINETIC PARAMETERS OF REFRIGERANTS USED IN MINE AIR REFRIGERATORS .PART 2 – REFRIGERANT R404A 矿用空气制冷机用制冷剂热力学和热力学参数的函数依赖性。第2部分-制冷剂r404a

IF 1.2 4区工程技术