Affected by the fault surface cracks causes and characteristics of
Broken with the mechanical strength of rock at the greatly reduced, so that the deformation fault rock outcrops at the surface show a relatively concentrated part of the overburden movement and deformation occurred while the rock slide occurred along the fault plane, the surface movement within the movement and deformation of the basin's distribution occurred against the fault plane showed a tendency to migrate fault outcrops deflection, resulting in damage or cracks because of step-like fault plane dip F6 smaller,
air jordan high heels, so that outcrops at the surface fault cracks appear in the corner designated by the exploitation of conventional mobile sphere of influence outside. 3.2 Analysis of surface morphology of cracks according to the data, fault surface cracks under the influence (or step) drop △ Ⅳ determined by the formula △ Ⅳ: / f where: K - fault influence coefficient; Ⅳ - basin subsidence expected value of the largest subsidence 1709.6mm; a - fault plane dip,
diesel store paris, F16 fault for the 47 - sink basin radius, about 1701 '13. : (1) z - fault outcrops to the surface from the point of maximum subsidence,
######## oakley sunglasses, the measurement of 2051 '13. . Cracks under the surface level subsidence ZXW = 65mm, according to equation (1) calculation, F16 fault influence coefficient K: 0052 fault shadow 250 Jiaozuo Institute of Technology 1999 l8 coefficient of small volume effects due to the fault from the 2228 face F6 According to the Polish scholars from the remote's leisure gap △ w crack down by the fault slip plate movement generated by the vertical component of △ wF and no faults at the corresponding position of the sinking value of △ w two components, namely △ Ⅵ, == △ W . + △ Ⅵ, P (2) where AW = · q · eayAWr: where: q a subsidence coefficient,
Beats By Dre Studio, taking 0.65; mouth - coefficient, n = one hundred 0. ; 69 (H is the mining depth, y is the boundary angle); m - mining thick,
MBTシューズ 販売店, taking 3.5m; jr - fault outcrops to the mined area boundary distance, m; - alluvial thickness, 11.5m . As the mobile basin located outside the fault outcrop, that is no fault at the corresponding location of the sinking value of △ w = 0, that is, △ w = AWF, according to equation (2) is calculated, △ w = 62mm; with the measured value difference of only 3mm. Surface crack width △ M = dxWcotd = 65 × cot47. = 61mm, 63mm basically consistent with the measured values. Through the above analysis shows that: Fl6 drive up and down the fault slip along the fault plane is the fault outcrop at the cracks led to an important factor, and F6 range of fault control surface movement and surface crack growth characteristics. 4 Conclusion (1) on-site measured data and theoretical analysis, confirmed the 2228 southern face of the surface cracks due to F6 fault, footwall slip along the fault plane caused by surface cracks on buildings, structures the extent of damage more serious. (2) the development of cracks in the surface characteristics by the faults, the fault plane of the occurrence, mining thickness, fault outcrop and boundaries of mined-out area relative position of the fault surface drop and other factors that affect the fracture characteristics of the important factors. (3) Based on the analysis of measured data and calculations, mattress out of the mine geological mining conditions, fault impact factor K = 0052 Reference i China University of Mining and surface coal mine rock movement Chongqing: Chongqing University Press, 198 987 ~ 892 He Guoqing mine State mining subsidence school twist: China Mining University Press. 1991.104 ~ 107AnalysisoftheGroundFissureSFeafureandItSCauseso fFormationInfluencedbytheFaultZhouQuanjieChangXing min (LibyanCoalMineBureau, Ruzhou471200) (YongchCoatMin day ...) AbstractOnthebasisoftheanalysisofthedatasurveyed, ithasstudiedtheinfluencedarea. causesofformationandfeatureoffissureofgroundsurfac ebymininginGuozhuangCOalmineofLiyuanMineBureauItis provedthatthefaultistheimportantfactor. Keywordsdamagebymining; thefissureofgroundsurface; fault (this responsibility bream school Huxiu Fang Lin 2-2)
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