简介：

简介：Inthisstudy,the3-dimensionaldiscreteelementmethodisfirstlyintroducedtoexplainthefracturingdamageprocessofthedynamicsplitexperimentofaspecialbrittleglassZnS.ThecorrespondingdynamicsplitexperimentisalsoperformedbyusingthesplitHopkinsonpressurebar.Thenthenumericalresultscorrespondcloselytothoseobtainedbyexperiments,andthefracturingdamagemodeshowsthatthesampleunderhighstrainrateloadingwouldcrackalongverticaldiameterinthebandregionbetweentwoloadingedges,whichdiffersfromthestaticdamagemode.Furthermore,bycomparingagroupofcontrastnumericaltests,thenumericalresultsprovethatloadingareauponthetopsideofsampleswouldinfluencethefracturemodeofdynamicsplitexperiments,whichindicatesthatthenarrowloadingplaneisbetter.

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简介：在为低温度、浅、高的冰点油水库折断处理期间，首要的问题是由注射冷液体克服uncompleted故障，折断液体的uncompletedcleanup和形成的冷损坏。避免那些问题，采用被建议一新包含了在这篇论文描述了的产生热的水力的断裂液体系统。第一，二种化学产生热的系统我们再学习，NH_4Cl-NaNO_2系统被选择。根据系统的反应特征，草酸酸被选择为反应的催化剂并且包含由阶段分离方法把乙醇纤维素和石蜡用作涂层材料。有折断液体的hydroxypropyl-guar的NH_4Cl-NaNO_2-encapsulated草酸酸的相容性也在论文被讨论。结果证明包含的水力的断裂液体包含了heat-generatingagents兔好稳定性和相容性。当断裂的液体包含2.0摩尔·L~时(-1)NH_4Cl-NaNO_2,0.93%每硫酸盐包含了草酸酸和0.08%铵，山峰温度罐头到达78.0℃和剩余液体的粘性是在4个小时以后的3.12mPa·s。

简介：Seismicruptureproducedbyactivefaultingcausesgroundsurfacefracturingandseriouslydamagesbuildings.However,thefracturetracesareusuallyindistinctornon-visiblebecauseofcomplicateddeformationsinQuaternaryunconsolidatedmaterials,sotheirupperpartscanhardlybediscoveredonexploratorytrenches.Theaimofthispaperistostudythetypesoffaultruptureanddisplacementindifferentloosedepositbedsfromajointviewofmega-,meso-,andmicroscopicscales,andtofindthemarkandmethodfortimingthepalaeoseismicruptureonexploratorytrenches.