岩石受荷载变形的电阻率曲线分析
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摘要
电阻率是岩石的重要物理参数,对研究岩石的固有特性和赋存状态有着重要的作用。选取砂岩、灰岩、泥岩和花岗岩为代表岩样,进行受荷载条件下的电阻率曲线分析,得到了电阻率的临界点,其电阻率临界点的应力比值范围为70%~85%,对应于岩石应力应变中的屈服点。分析发现,电阻率临界点具有方向性,岩石电阻率临界点可以用于判断岩石的屈服点和应变状态。
Resistivity is one of the important physical parameter of rocks.It plays an important role in analyzing the intrinsic properties and occurrence conditions of rocks.The paper chooses sandstone,limestone,mudstone and granite as representing rocks to analyze the resistivity curve during loading progress.Through the analysis,the critical point of resistivity was found.And the stress ratio of the critical point is 70%~85%,corresponding to the yield point in rocky strain.And the directivity of critical point was found at the same time.The critical point found from the study can be used to judge yield point and the strain state.
引文
[1]毛桐恩,陈大元,刘新美,等.承载岩石地电阻率各向异性变化实验研究与现场观测结果[J].地震,1998,18(增刊):33-38.
    [2]刘树才,刘鑫明,姜志海,等.煤层底板导水裂隙演化规律的电法探测研究[J].岩石力学与工程学报,2009,28(2):348-356.
    [3]刘树才.煤矿底板突水机理及破坏裂隙带演化动态探测技术[D].徐州:中国矿业大学,2008.
    [4]王桦,纪洪广,程桦,等.两淮煤系地层主要岩石单轴受压条件下的导电特性实验研究[J].岩石力学与工程学报,2010,29(8):1631-1638.
    [5]陈大元,陈峰,贺国玉.岩石受压过程中“应力反复”对电阻率的影响[J].地震学报,1983,9(2):303-311.
    [6]安金珍,修济刚,陈峰,等.单轴压力下有补给水岩石电阻率变化各向异性研究[J].中国地震,1996,12(3):300-306.
    [7]李德春,葛宝堂,舒继森.岩石破坏过程中的电阻率变化实验[J].中国矿业大学学报,1999,28(5):491-493.
    [8]吕广廷,赵广堃,谢原定,等.应力作用下层状砂岩电阻率的变化特征[J].西北地震学报,1987,6(1):11-16.
    [9]陆阳泉,钱家栋,刘建毅,等.岩石失稳破裂前激发极化效应的初步研究[J].地震,1992,2(4):28-36.

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