Pub Date : 2023-07-27DOI: 10.24425/ams.2023.146857
{"title":"146857","authors":"","doi":"10.24425/ams.2023.146857","DOIUrl":"https://doi.org/10.24425/ams.2023.146857","url":null,"abstract":"","PeriodicalId":55468,"journal":{"name":"Archives of Mining Sciences","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46960086","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}
Pub Date : 2023-07-20DOI: 10.24425/ams.2020.133189
J. Vidal-Lombas, M. álvarez-Fernández, M. Casado-Sulé, M. Prendes-Gero, F. SUÁREZ-DOMÍNGUEZ
This paper shows the possibility that the mineral coal existing in the mining basins of northern Spain have a high added value. This would facilitate its future use in different fields such as new materials, nanotechnology, energy use in situ , coal bed methane, enhanced coal bed methane and coalmine methane. An analytical study of mineral coal samples is carried out. The samples come from two deposits located in coal basins of the Cantabrian Mountains. The duly prepared samples are subjected to an activation process. Within this transformation, different treatments are applied to different sub-samples. Some of the sub-samples suffer a previous demineralization by successive attacks with acids, followed by oxidation and pyrolysis. Finally, all of them are activated with CO 2 and H 2 O (steam) . The carbonaceous products resulting from each treatment are characterised. The results show that all the pre-treatments used were positive for the textural development of the materials. Likewise, proper management of the processes and of the different operating variables allows the procurement of carbo- naceous materials with a “tailor-made” structural development of the coal type. This material receives the name “activated” and can be employed in specific processes.
{"title":"Revalorization of Mineral Coal, to Obtain Carbonaceous Materials with High Added Value","authors":"J. Vidal-Lombas, M. álvarez-Fernández, M. Casado-Sulé, M. Prendes-Gero, F. SUÁREZ-DOMÍNGUEZ","doi":"10.24425/ams.2020.133189","DOIUrl":"https://doi.org/10.24425/ams.2020.133189","url":null,"abstract":"This paper shows the possibility that the mineral coal existing in the mining basins of northern Spain have a high added value. This would facilitate its future use in different fields such as new materials, nanotechnology, energy use in situ , coal bed methane, enhanced coal bed methane and coalmine methane. An analytical study of mineral coal samples is carried out. The samples come from two deposits located in coal basins of the Cantabrian Mountains. The duly prepared samples are subjected to an activation process. Within this transformation, different treatments are applied to different sub-samples. Some of the sub-samples suffer a previous demineralization by successive attacks with acids, followed by oxidation and pyrolysis. Finally, all of them are activated with CO 2 and H 2 O (steam) . The carbonaceous products resulting from each treatment are characterised. The results show that all the pre-treatments used were positive for the textural development of the materials. Likewise, proper management of the processes and of the different operating variables allows the procurement of carbo- naceous materials with a “tailor-made” structural development of the coal type. This material receives the name “activated” and can be employed in specific processes.","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":"41357871","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}
Pub Date : 2023-07-20DOI: 10.24425/ams.2022.143680
Chen Fan, Na Zhang, Bei Jiang, W. Liu
amounts of data in truck haulage datasets and a more accurate prediction model for truck productivity
卡车运输数据集中的数据量和更准确的卡车生产率预测模型
{"title":"Preprocessing Large Datasets Using Gaussian Mixture Modelling to Improve Prediction Accuracy of Truck Productivity at Mine Sites","authors":"Chen Fan, Na Zhang, Bei Jiang, W. Liu","doi":"10.24425/ams.2022.143680","DOIUrl":"https://doi.org/10.24425/ams.2022.143680","url":null,"abstract":"amounts of data in truck haulage datasets and a more accurate prediction model for truck productivity","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":"49290838","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}
Pub Date : 2023-07-20DOI: 10.24425/ams.2022.142411
J. Hydzik-Wiśniewska, E. Hycnar
: the article presents the problem of selecting the correct type of limestone for producing paving stones used to renovate the surface of Mariacki square in krakow. due to using up local limestone deposits, imported limestones began to be used. the first one was a turkish limestone with the trade name lotus beige. despite substantial physical and mechanical parameters (compressive strength 134 MPa, water absorption 0.26%), after several years of use, the paving stone cracked and, as a result, fell apart into smaller fragments. Hauteville limestone from France has been selected for the following reconstruc - tion of the surface. this limestone in the air-dry state was characterised by even higher parameters, i.e. compressive strength of 157 MPa, flexural strength at 16.9 MPa, bohme abrasion test at 15275 mm 3 , and water absorption at 0.23%. the tests also showed absolute frost resistance and high resistance to thermal shock. Unfortunately, after several years of using the surface of Mariacki square, cracks and flaking of the rock material have been observed in terms of some paving stones. these cracks appeared within the so-called stylolite seams, which are a natural feature of limestone. despite a very strict selection of materials, unfortunately, problems with the surface’s durability could not be avoided.
本文介绍了选择正确类型的石灰石来生产用于修复克拉科夫Mariacki广场表面的铺路石的问题。由于当地的石灰石储量耗尽，开始使用进口石灰石。第一块是土耳其石灰石，商品名是莲花米色。尽管有大量的物理和机械参数(抗压强度134 MPa，吸水率0.26%)，但经过几年的使用，铺路石开裂，结果变成了更小的碎片。来自法国的奥特维尔石灰石被选中用于下面的表面重建。这种石灰石在风干状态下具有更高的参数，即抗压强度为157 MPa，抗折强度为16.9 MPa, bohme磨损试验为15275 mm 3，吸水率为0.23%。试验还显示了绝对抗冻性和高抗热震性。不幸的是，经过几年的使用Mariacki广场的表面，已经观察到一些铺路石的岩石材料的裂缝和剥落。这些裂缝出现在所谓的柱面岩缝中，这是石灰岩的自然特征。尽管材料的选择非常严格，但不幸的是，表面的耐久性问题无法避免。
{"title":"The Use of Limestone in Historic Road Surfaces – a Case Study","authors":"J. Hydzik-Wiśniewska, E. Hycnar","doi":"10.24425/ams.2022.142411","DOIUrl":"https://doi.org/10.24425/ams.2022.142411","url":null,"abstract":": the article presents the problem of selecting the correct type of limestone for producing paving stones used to renovate the surface of Mariacki square in krakow. due to using up local limestone deposits, imported limestones began to be used. the first one was a turkish limestone with the trade name lotus beige. despite substantial physical and mechanical parameters (compressive strength 134 MPa, water absorption 0.26%), after several years of use, the paving stone cracked and, as a result, fell apart into smaller fragments. Hauteville limestone from France has been selected for the following reconstruc - tion of the surface. this limestone in the air-dry state was characterised by even higher parameters, i.e. compressive strength of 157 MPa, flexural strength at 16.9 MPa, bohme abrasion test at 15275 mm 3 , and water absorption at 0.23%. the tests also showed absolute frost resistance and high resistance to thermal shock. Unfortunately, after several years of using the surface of Mariacki square, cracks and flaking of the rock material have been observed in terms of some paving stones. these cracks appeared within the so-called stylolite seams, which are a natural feature of limestone. despite a very strict selection of materials, unfortunately, problems with the surface’s durability could not be avoided.","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":"44840090","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}
Pub Date : 2023-07-20DOI: 10.24425/ams.2021.137463
W. Song, Jianwei Cheng, Wenhe Wang, Yi Qin, Zui Wang, M. Borowski, Yue Wang, P. Tukkaraja
Mine gas explosions present a serious safety threat in the worldwide coal mining industry. it has been considered the no.1 killer for underground coal mining workers. the formation of an explosive atmosphere involves various factors. Due to complicated stratified geology and the coal production process, geological conditions and coal production process reasons and particular working sections underground present a high risk of an explosion that would most likely cause casualties and property loss. in this study, the basic conditions, propagation law and hazards analysis of gas explosions are reviewed, followed by a review of the typical locations where an explosion would occur. Finally, current technologies used in the mining industry for preventing gas explosions and suppressing the associated dangers were studied. Preventive gas explosion technologies mainly include gas drainage, gas accumulation prevention and gas and fire source monitoring technologies. the technologies often used to control or mitigate gas explosion hazards are usually divided into active and passive, and the advantages and disadvantages of each method are discussed and compared. this paper aims to summarise the latest technologies for controlling and suppressing gas explosion and guides mining engineers to design risk mitigation strategies.
{"title":"Underground Mine Gas Explosion Accidents and Prevention Techniques – An overview","authors":"W. Song, Jianwei Cheng, Wenhe Wang, Yi Qin, Zui Wang, M. Borowski, Yue Wang, P. Tukkaraja","doi":"10.24425/ams.2021.137463","DOIUrl":"https://doi.org/10.24425/ams.2021.137463","url":null,"abstract":"Mine gas explosions present a serious safety threat in the worldwide coal mining industry. it has been considered the no.1 killer for underground coal mining workers. the formation of an explosive atmosphere involves various factors. Due to complicated stratified geology and the coal production process, geological conditions and coal production process reasons and particular working sections underground present a high risk of an explosion that would most likely cause casualties and property loss. in this study, the basic conditions, propagation law and hazards analysis of gas explosions are reviewed, followed by a review of the typical locations where an explosion would occur. Finally, current technologies used in the mining industry for preventing gas explosions and suppressing the associated dangers were studied. Preventive gas explosion technologies mainly include gas drainage, gas accumulation prevention and gas and fire source monitoring technologies. the technologies often used to control or mitigate gas explosion hazards are usually divided into active and passive, and the advantages and disadvantages of each method are discussed and compared. this paper aims to summarise the latest technologies for controlling and suppressing gas explosion and guides mining engineers to design risk mitigation strategies.","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":"45049188","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}
Pub Date : 2023-07-20DOI: 10.24425/ams.2020.135182
{"title":"Radon Measurements in Groundwater Mines in La Palma and El Hierro, Canary Islands (Spain)","authors":"","doi":"10.24425/ams.2020.135182","DOIUrl":"https://doi.org/10.24425/ams.2020.135182","url":null,"abstract":"","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":"47921283","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}
To solve the problem of large deformation soft rock roadway with complicated stress condition in Baluba copper mine, the characteristics of roadway deformation and failure modes are analyzed deeply on the basis of geological survey. Combined with the theoretical analysis and numerical simulation, the new reinforcement technology with floor mudsill and grouting anchor cable is proposed. Moreover, the three dimension numerical simulation model is established by the software FLAC-3D, the support parameter is optimized by it. The results show that the optical array pitch of the U-steel shelf arch is 0.8 m, and the optical array pitch of the grouting anchor cable is 2.4 m. At last, the field experiments are done all over the soft rock roadway. Engineering practice shows that the deformation of soft rock roadway in Baluba copper mine is effectively controlled by adopting the new reinforcement technology, which can provide certain references for similar engineering.
{"title":"Failure Mechanism and Supporting Measures for Large Deformation of Soft Rock Roadway in Baluba Copper Mine","authors":"A. Wu, Chen Shunman, Yi-ming Wang, Xun Chen","doi":"10.24425/122458","DOIUrl":"https://doi.org/10.24425/122458","url":null,"abstract":"To solve the problem of large deformation soft rock roadway with complicated stress condition in Baluba copper mine, the characteristics of roadway deformation and failure modes are analyzed deeply on the basis of geological survey. Combined with the theoretical analysis and numerical simulation, the new reinforcement technology with floor mudsill and grouting anchor cable is proposed. Moreover, the three dimension numerical simulation model is established by the software FLAC-3D, the support parameter is optimized by it. The results show that the optical array pitch of the U-steel shelf arch is 0.8 m, and the optical array pitch of the grouting anchor cable is 2.4 m. At last, the field experiments are done all over the soft rock roadway. Engineering practice shows that the deformation of soft rock roadway in Baluba copper mine is effectively controlled by adopting the new reinforcement technology, which can provide certain references for similar 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":"47966602","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}
Pub Date : 2023-07-20DOI: 10.24425/ams.2022.140705
AbbAS KhAjouEi SirjAni, F. Sereshki, M. Ataei, MohAMMAd AMiri hoSSEini
case study
案例研究
{"title":"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)","authors":"AbbAS KhAjouEi SirjAni, F. Sereshki, M. Ataei, MohAMMAd AMiri hoSSEini","doi":"10.24425/ams.2022.140705","DOIUrl":"https://doi.org/10.24425/ams.2022.140705","url":null,"abstract":"case study","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":"48026872","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}
Pub Date : 2023-07-20DOI: 10.24425/ams.2021.136697
A. Nowakowski, J. Nurkowski
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.
{"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":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":"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}
Pub Date : 2023-07-20DOI: 10.24425/ams.2020.133191
Yangsheng Zhao
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.
{"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":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":"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}
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