CAJ | 학술논문

对典型岩石摩擦滑动试验装置进行了改进,以8种硅酸盐岩作为研究对象,在低正应力条件下对岩石摩擦滑动过程中的静摩擦系数进行了试验研究.对滑动表面形貌进行了表征,从统计学角度分析了粗糙度对静摩擦系数的影响,并基于滑动表面微凸体(凹凸体、微观粗糙度)对这一影响作进一步分析.研究表明:滑动面为抛光面时,千枚岩、石英岩、岩屑砂岩和石英砂岩的静摩擦系数为0.38~0.47,砾岩、含砾粗粒石英砂岩、中粒岩屑砂岩和中粒石英砂岩的静摩擦系数为0.83~1.07;在粗糙度中,轮廓最大谷深Rm和轮廓最大峰高Rp两个参数导致摩擦滑动中产生不同静摩擦系数,且随着这两个参数的增加,静摩擦系数呈指数规律增加;千枚岩、石英岩、岩屑砂岩和石英砂岩滑动表面的微凸体数量较少,砾岩、含砾粗粒石英砂岩、中粒岩屑砂岩和中粒石英砂岩滑动表面的微凸体数量较多,随着微凸体数量的增加岩石摩擦滑动过程中的静摩擦系数增加.
대전형암석마찰활동시험장치진행료개진,이8충규산염암작위연구대상,재저정응력조건하대암석마찰활동과정중적정마찰계수진행료시험연구.대활동표면형모진행료표정,종통계학각도분석료조조도대정마찰계수적영향,병기우활동표면미철체(요철체、미관조조도)대저일영향작진일보분석.연구표명:활동면위포광면시,천매암、석영암、암설사암화석영사암적정마찰계수위0.38~0.47,력암、함력조립석영사암、중립암설사암화중립석영사암적정마찰계수위0.83~1.07;재조조도중,륜곽최대곡심Rm화륜곽최대봉고Rp량개삼수도치마찰활동중산생불동정마찰계수,차수착저량개삼수적증가,정마찰계수정지수규률증가;천매암、석영암、암설사암화석영사암활동표면적미철체수량교소,력암、함력조립석영사암、중립암설사암화중립석영사암활동표면적미철체수량교다,수착미철체수량적증가암석마찰활동과정중적정마찰계수증가.
The typical experiment apparatus of rock friction sliding was designed and improved. Under low normal stress, the static friction coefficients for 8 silicate rocks were studied experimentally based on the apparatus. The surface topography of the sliding surface was characterized by the statistic parameters and asperity; and the influence of roughness parameter on static friction coefficient was analyzed. When the sliding surfaces are polished, the static friction coefficients of phyllite, quartzite, lithic sandstone, and quartz sandstone are 0.38-0.47;and the ones of conglomerate, gravelly coarse quartz sandstone, medium grained lithic sandstone, and medium grained quartz sandstone are 0.83-1.07. The two roughness parameters which are the maximum depth of profile valley (Rm) and the maximum height of profile peak (Rp) make the asperity produce different actions and induce to different static friction coefficients. With the increment of the two roughness parameters, the static friction coefficient is increased with exponential law. The amounts of asperity are less on the sliding surfaces of phyllite, quartzite, lithic sandstone, and quartz sandstone. The amounts are more on the ones of conglomerate, gravelly coarse quartz sandstone, medium grained lithic sandstone, and medium grained quartz sandstone. With the increment of asperity amounts, the static friction coefficient is increased during rock frictional sliding.