Results 41 to 50 of about 43,669 (311)
Structural history of the southwestern corner of the Kaapvaal Craton and the adjacent Namaqua realm: new observations and a reappraisal [PDF]
, 1991 The rocks along the southwestern margin of the Kaapvaal Craton were deformed up to 7 times during the Early to Middle Proterozoic. The oldest deformation D1 is recorded in the N-S-trending Uitkoms cataclasite of pre-Makganyene age (>2.24 Ga) on the ...
Altermann, Wladyslaw, Hälbich, Ingo W.
core +1 more source
Relationship between Movement Laws of the Overlaying Strata and Time Space of the Mined-Out Volume
Geofluids, 2020 The study and accurate prediction of the movement of overburden rock mass and surface subsidence are crucial for a safe production in metal mines. This study investigates the relationship between the movement laws of overlaying strata and the time space ...
Xiang Yu +5 more
doaj +1 more source
Advances in Civil Engineering, 2021 The aim of this study is to obtain movement laws of overlying strata above a fully mechanized coal mining face backfilled with gangue and solve the problem of surface subsidence during coal mining.
Zhengkai Yang +6 more
doaj +1 more source
Enrichment Law of Hazardous Chemicals Enrichment under Dangerous Chemical Environment of Coal Mining
Chemical Engineering Transactions, 2018 During the process of coal mining, the CH4 produced by the coal will be released in the workspace. With the movement of the working face, the overlying strata will be moved or destroyed, resulting in the continuous development of mining cracks and thus ...
Xiaohua Jin, Beifang Gu
doaj +1 more source
Energy Science & Engineering, 2020 In underground mining operations, the overlying strata move, deform, and crack as the underground working face advances due to strata breakage, failure, and subsidence, forming a “vertical three zone” over the mined out area.
Jianwei Cheng +6 more
doaj +1 more source
Erratum to: Experimental research on overlying strata movement and fracture evolution in pillarless stress-relief mining [PDF]
International Journal of Coal Science & Technology, 2015 Xue, Junhua +5 more
openaire +2 more sources
Geofluids, 2023 Theoretical analysis and numerical simulation were conducted to study the disaster-causing mechanism of structural instability of the overlying strata induced by water–rock coupling and effectively prevent and control the powered support jammed accident ...
Zhihua Li +5 more
doaj +1 more source
Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites [PDF]
, 2013 Late Paleozoic glacial diamictites occur in many localities in western Argentina, indicating that the region was strongly affected by glaciation during the mid-Carboniferous (late Serpukhovian–early Bashkirian).
Gulbranson, Erik L. +6 more
core +1 more source
Advances in Civil Engineering, 2021 The basis of traditional ground pressure and strata control techniques is the key strata theory, wherein the position of the key stratum can easily be determined for coal seams with regular thickness and without goaf.
Gaochuan Guo, Yongkang Yang
doaj +1 more source
Advances in Civil Engineering, 2018 A thin basement coal seam mining model under different overlying strata conditions was developed using the discrete element software UDEC. This approach is used to discuss the safety mining of the thin basement coal seams.
Min Tu +3 more
doaj +1 more source