LEADER 04603nam 2200433 450 001 9910552741403321 005 20221016001306.0 010 $a9783030963941$b(electronic bk.) 010 $z9783030963934 035 $a(MiAaPQ)EBC6921843 035 $a(Au-PeEL)EBL6921843 035 $a(CKB)21393290700041 035 $a(PPN)261525484 035 $a(EXLCZ)9921393290700041 100 $a20221016d2022 uy 0 101 0 $aeng 135 $aurcnu|||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aNew mining tools and methods for roadheader mining heads /$fKrzysztof Kotwica 210 1$aCham, Switzerland :$cSpringer,$d[2022] 210 4$d©2022 215 $a1 online resource (141 pages) 311 08$aPrint version: Kotwica, Krzysztof New Mining Tools and Methods for Roadheader Mining Heads Cham : Springer International Publishing AG,c2022 9783030963934 327 $aIntro -- Preface -- Acknowledgements -- Contents -- 1 Introduction -- 1.1 Mining Methods of Hard Rock Mining -- 1.2 The Benefits of Mechanical Technology -- 1.3 Machines and Mining Tools Used in Mechanical Methods of Hard Rock Mining -- References -- 2 Problems of Hard Rock Mining Using Cutting Tools -- 2.1 The Theory of Mechanical Mining of Rocks by Cutting -- 2.2 Pick Edge Wear and Its Influence on the Efficiency of the Cutting Process -- 2.2.1 Possibilities of Increasing the Durability of Conical Picks -- References -- 3 The Hard Rock Mining Using Disk Tools -- 3.1 The Principle of Mining with a Smooth, Symmetrical Disk Tool -- 3.2 The Advantages and Disadvantages of Hard Rock Mining Using Symmetrical Disk Tool -- 3.3 Hard Rock Mining Using the Undercutting Method and Asymmetrical Disk Tool -- References -- 4 The Crown Pick as an Alternative for the Conical Pick -- 4.1 The Construction and Principle of Work of the New Solution of the Crown Pick -- 4.2 The Comparative Laboratory Stands Tests of a New Type of Crown Pick and Conical Pick -- 4.3 Laboratory Tests of Crown Pick Solutions in Order to Select the Most Advantageous Version -- 4.4 Field Tests of the New Solution of the Crown Pick -- 4.5 Industrial Tests of the New Solution of the Crown Pick -- References -- 5 Lubricated Holder for Conical Pick -- 5.1 Possibilities of Elimination or Reduction of Hazards Occurring During Rock Mining with Conical Picks -- 5.2 The Construction and Principle of Work of the New Solution of the Lubricated Holder of Conical Pick -- 5.3 The Comparative Laboratory Tests of the Standard and Lubricated Conical Pick Holder -- 5.4 Laboratory Tests of Lubricated Holder Solutions of Conical Picks to Select the Most Advantageous Version -- 5.5 Field Tests of the New Solution of Lubricated Holder Solutions of Conical Picks. 327 $a5.6 Industrial Tests of the New Solution of Lubricated Holder Solutions of Conical Picks -- References -- 6 The Mining Head with Mini-Disk Tools with Complex Motion Trajectory -- 6.1 The Conception of a New Solution of Mining Head with Mini-Disk Tools -- 6.2 Laboratory Tests of the New Mining Head Solution and Mini-Disk Tools -- 6.2.1 Laboratory Tests of a Single Plate with Mini-Disk Tools with A straight-Motion Trajectory -- 6.2.2 Laboratory Tests of Pressing the Single Mini-Disk Tools into the Rock Sample -- 6.2.3 Laboratory Tests of a Single Plate with Mini-Disk Tools with A Complex-Motion Trajectory -- 6.3 Developing and Manufacturing of New Solution of the Mining Head with Mini-Disk Tools of Complex-Motion Trajectory -- 6.4 Field Tests of the New Solution of the Mining Head with Mini-Disk Tools of Complex-Motion Trajectory -- References -- 7 Summary and Final Comments -- 7.1 The Concept of New Lubricated Crown Tool -- 7.2 Proposal of the New Design of Four-Plate Mining Head with Disk Tools of Complex Trajectory -- 7.3 Proposal of the Concept of Single Drive for Mining Head with Disk Tools of Complex Trajectory -- 7.4 Proposal of New Materials and Manufacturing Technology of Asymmetrical Mini-Disk Tools -- 7.5 Summary -- References. 606 $aMining machinery$vParts 606 $aRock splitters (Machines) 615 0$aMining machinery 615 0$aRock splitters (Machines) 676 $a622.0284 700 $aKotwica$b Krzysztof$01214231 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 912 $a9910552741403321 996 $aNew Mining Tools and Methods for Roadheader Mining Heads$92803992 997 $aUNINA LEADER 02358oam 22006134a 450 001 9910552759703321 005 20230621141131.0 010 $a1-4529-6499-8 035 $a(CKB)4100000011758613 035 $a(MiAaPQ)EBC6476645 035 $a(OCoLC)1232010665 035 $a(MdBmJHUP)musev2_94403 035 $a(EXLCZ)994100000011758613 100 $a20201226d2021 uy 0 101 0 $aeng 135 $aurcnu|||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 14$aThe Migrant's Paradox$eStreet Livelihoods and Marginal Citizenship in Britain /$fSuzanne M. Hall 210 1$cUniversity of Minnesota Press,$aMinneapolis :$d[2021] 215 $a1 online resource (232 pages) 225 0 $aGlobalization and community ;$vvolume 31 300 $aIncludes index 311 08$a1-5179-1050-1 320 $aIncludes bibliographical references and index. 327 $aIntroduction : the migrant's paradox -- The scale of the migrant -- Edge territories -- Edge economies -- Unheroic resistance -- A citizenship of the edge. 330 $a"Connects global migration with urban marginalization, exploring how "race" maps onto place across the globe, state, and street"--$cProvided by publisher. 410 0$aGlobalization and community ;$vVolume 31. 606 $aInformal sector (Economics)$zGreat Britain 606 $aMarginality, Social$zGreat Britain 606 $aCitizenship$zGreat Britain 606 $aStreet life$zGreat Britain 606 $aImmigrants$zGreat Britain$xEconomic conditions$y21st century 606 $aImmigrants$zGreat Britain$xSocial conditions$y21st century 607 $aGreat Britain$xSocial conditions 607 $aGreat Britain$xRace relations 607 $aGreat Britain$xEmigration and immigration 608 $aElectronic books. 615 0$aInformal sector (Economics) 615 0$aMarginality, Social 615 0$aCitizenship 615 0$aStreet life 615 0$aImmigrants$xEconomic conditions 615 0$aImmigrants$xSocial conditions 676 $a305.9/069120941 686 $aMS 3550$2rvk 700 $aHall$b Suzanne$g(Suzanne M.),$01176390 801 0$bMdBmJHUP 801 1$bMdBmJHUP 906 $aBOOK 912 $a9910552759703321 996 $aThe Migrant's Paradox$92803863 997 $aUNINA