Archives of Mining Sciences最新文献_第3页

Methane Hazard during the Closure of Mine Excavations in Liquidated Mine – Numerical Simulation 清算矿山关闭开采过程中的甲烷危害——数值模拟

4区工程技术

Archives of Mining Sciences Pub Date : 2023-09-28 DOI: 10.24425/ams.2023.146866

引用次数: 0

146857 one hundred and forty-six thousand eight hundred and fifty-seven

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-27 DOI: 10.24425/ams.2023.146857

引用次数: 0

Failure Mechanism and Supporting Measures for Large Deformation of Soft Rock Roadway in Baluba Copper Mine 巴鲁坝铜矿软岩巷道大变形破坏机理及支护措施

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/122458

A. Wu, Chen Shunman, Yi-ming Wang, Xun Chen

引用次数: 6

Prediction of Backbreak in the Blasting Operations using Artificial Neural Network (ANN) Model and Statistical Models (Case study: Gol-e-Gohar Iron Ore Mine No. 1) 基于人工神经网络(ANN)模型和统计模型的爆破作业背断预测(以gole - gohar铁矿1号矿为例)

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2022.140705

AbbAS KhAjouEi SirjAni, F. Sereshki, M. Ataei, MohAMMAd AMiri hoSSEini

引用次数: 4

About Some Problems Related to Determination of the E.G. Biot Coefficient for Rocks 关于确定岩石E.G.比奥系数的几个问题

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2021.136697

A. Nowakowski, J. Nurkowski

{"title":"About Some Problems Related to Determination of the E.G. Biot Coefficient for Rocks","authors":"A. Nowakowski, J. Nurkowski","doi":"10.24425/ams.2021.136697","DOIUrl":"https://doi.org/10.24425/ams.2021.136697","url":null,"abstract":"use of the poroelasticity theory by Biot in the description of rock behaviour requires the value of the e.g. Biot coefficient α to be determined. The α coefficient is a function of two moduli of compressibility: the modulus of compressibility of the rock skeleton K s and the effective modulus of compressibility K . These moduli are determined directly on the basis of rock compressibility curves obtained during compression of a rock sample using hydrostatic pressure. There is also a concept suggesting that these compressibility moduli might be determined on the basis of results of the uniaxial compression test using the fact that, in the case of an elastic, homogeneous and isotropic material, the modulus of compressibility of a material is a function of its Young modulus and its Poisson ratio. This work compares the results obtained from determination of the Biot coefficient by means of results of compressibility test and uniaxial compression test. it was shown that the uniaxial compression test results are generally unsuitable to determine the value of the coefficient α . An analysis of values of the determined moduli of compressibility shows that whereas the values of effective moduli of compressibility obtained using both ways may be considered as satisfactorily comparable, values of the relevant rock skeleton moduli of compressibility differ significantly.","PeriodicalId":55468,"journal":{"name":"Archives of Mining Sciences","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44118796","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: 3

Field and Experimental Research on Airflow Velocity Boundary Layer in Coal Mine Roadway 煤矿巷道气流速度边界层的现场与试验研究

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2020.133191

Yangsheng Zhao

{"title":"Field and Experimental Research on Airflow Velocity Boundary Layer in Coal Mine Roadway","authors":"Yangsheng Zhao","doi":"10.24425/ams.2020.133191","DOIUrl":"https://doi.org/10.24425/ams.2020.133191","url":null,"abstract":"There is an airflow velocity boundary layer near tunnel wall when the air is flowing in the undergro- und coal mine. The thickness and distribution of the airflow velocity boundary layer could influence the discharge of harmful and toxic gases that enter the ventilating airflow through this flow interface. It may also have a major impact in coal mine gas explosion. The results of field measurements and simulation experimental data are used to research airflow velocity boundary layer in a flat walled mine roadway, which is considered in turn: as unsupported, I-steel sectioned arch or bolted and shot create supported cross section. By referenced to other literature studies that consider boundary layer characteristics and the analysis of on-site and experimental data sets we obtain the corresponding airflow velocity boundary layer characteristics for each of the supported roadway sections. The airflow velocity within the boundary layer increase is assumed to follow a logarithmic law given by the expression: u = a Ln( x ) + b . It is concluded that the thickness of the airflow velocity boundary layer is observed to significantly decrease with the airflow center velocity and to increase with roadway wall roughness. The airflow velocity distribution is found to be described by the equation: u = ( m 1 v + n 1 )Ln( d ) + m 2 v + n 2 , for the three types coal mine tunnel taking into account the influence of center airflow velocity.","PeriodicalId":55468,"journal":{"name":"Archives of Mining Sciences","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44359308","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: 3

The Analysis of Selected Methods of the Yielding of a Circular Arch Support Made of V Profiles V形截面圆弧拱支护屈服选择方法分析

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2020.134133

Łukasz Szot

{"title":"The Analysis of Selected Methods of the Yielding of a Circular Arch Support Made of V Profiles","authors":"Łukasz Szot","doi":"10.24425/ams.2020.134133","DOIUrl":"https://doi.org/10.24425/ams.2020.134133","url":null,"abstract":"Steel yielding arch support constructed of V profiles is commonly used to protect galleries and, in some cases, to reinforce or secure a shaft support. For this purpose, a closed, circular-shaped arch support is used, with arches overlapped by clamps that are typical for this type of construction. The support has high resistance to the impact of even (distributed over the entire surface of the support) load, however, as a result of significant deformation associated with a change in the radius of the curvatures, the support shows limited yielding capacity. This is due to the increase in resistance to slide on the locks, resulting from changes in the geometry of the ring caused by the rock mass. This article presents the results of research and analysis concerning the elements of the arch support with notches in arches. The research team tested the effect of the depth and location of the notches of the section’s flanges on the load impacting on the clamp’s bolts and the strength of the roof support. Moreover, the tests covered the influence of the number and location of clamps in a frictional joint on the change in the nature of work and yielding capacity. Finally, the research included both strength tests of the support’s elements, as well as strength analyses based on the finite element method.","PeriodicalId":55468,"journal":{"name":"Archives of Mining Sciences","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43393776","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

Analysis of the Possibilities of Using Composite Structural C-Channels as Lining for an Arch Support in Mining Excavation 复合结构c形通道衬砌采矿开挖拱支护的可行性分析

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2021.138599

M. Rotkegel, J. Korol, Dagmara Sobczak

{"title":"Analysis of the Possibilities of Using Composite Structural C-Channels as Lining for an Arch Support in Mining Excavation","authors":"M. Rotkegel, J. Korol, Dagmara Sobczak","doi":"10.24425/ams.2021.138599","DOIUrl":"https://doi.org/10.24425/ams.2021.138599","url":null,"abstract":"the article is the result of a project aimed at developing and implementing a design of composite accessories for support in excavations located in underground hard coal mines. the research team verified the possibility of using elements made of prefabricated composite structural profile as an alternative to steel and reinforced concrete lining elements used to improve support’s stability and protect against rockfall. this paper includes a research experiment on the possibilities of using a composite c-profile element as lining made in the pultrusion technology with a longitudinal position of the roving. the prefabricated structural profiles were adapted to the function by designing seatings for fitting the flanges for arch support’s V-profiles. Prototypes of these elements were subjected to bench tests in compliance with the guidelines for testing mesh linings. In addition, computer simulations using the finite element method were carried out. the values obtained during the tests were compared with the requirements for lightweight mesh and included the Polish standard PN-g-15050 and reinforced A-type concrete lining defined in the standard PN-g-06021. the team determined the areas where material strength exceeded and the structure was damaged. Despite the limited quantity of laboratory tests and lack of field tests in actual mining conditions, it was possible to address the argument of the research and determine whether it is possible to use c-profile made in the pultrusion technology as a lining element.","PeriodicalId":55468,"journal":{"name":"Archives of Mining Sciences","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46151888","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: 0

Preprocessing Large Datasets Using Gaussian Mixture Modelling to Improve Prediction Accuracy of Truck Productivity at Mine Sites 用高斯混合模型预处理大数据集提高矿场卡车生产率预测精度

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2022.143680

Chen Fan, Na Zhang, Bei Jiang, W. Liu

引用次数: 5

Powered Support in Dynamic Load Conditions – Numerical Analysis 动态载荷条件下的动力支架——数值分析

IF 1.2 4区工程技术

Archives of Mining Sciences Pub Date : 2023-07-20 DOI: 10.24425/ams.2020.134129

引用次数: 5