采矿与安全工程学报
採礦與安全工程學報
채광여안전공정학보
JOURNAL OF MINING AND SAFETY ENGINEERING
2015年
4期
689-696
,共8页
露采金属矿山%坚硬岩石%冻融循环%物理力学特性%强度折减法
露採金屬礦山%堅硬巖石%凍融循環%物理力學特性%彊度摺減法
로채금속광산%견경암석%동융순배%물리역학특성%강도절감법
open-pit metal mine%hard rock%freeze-thaw cycles%physical and mechanical property%strength reduction technique
利用西藏玉龙铜矿边坡花岗斑岩、灰岩、石英砂岩3种典型的坚硬岩石样本进行冻融循环实验,根据矿区所在地多年气象资料、采场所处自然环境,进行冻融温度区间为-20~20 ℃的岩石冻融循环试验,模拟了岩石冻融过程,研究了饱水状态坚硬岩石在冻融循环作用下的质量、体积、单轴抗压强度、抗拉强度、冻融系数、风化程度的变化规律,并绘出了冻融次数与试样的抗压强度、抗拉强度、冻融系数的拟合关系曲线,为坚硬岩石冻融研究提供了试验依据.将实验结果应用于西藏玉龙铜矿花岗斑岩边坡的具体实例中,采用强度折减法计算出了矿山边坡冻融风化前、后的安全系数,为寒区露采矿山边坡的稳定性研究提供了参考.
利用西藏玉龍銅礦邊坡花崗斑巖、灰巖、石英砂巖3種典型的堅硬巖石樣本進行凍融循環實驗,根據礦區所在地多年氣象資料、採場所處自然環境,進行凍融溫度區間為-20~20 ℃的巖石凍融循環試驗,模擬瞭巖石凍融過程,研究瞭飽水狀態堅硬巖石在凍融循環作用下的質量、體積、單軸抗壓彊度、抗拉彊度、凍融繫數、風化程度的變化規律,併繪齣瞭凍融次數與試樣的抗壓彊度、抗拉彊度、凍融繫數的擬閤關繫麯線,為堅硬巖石凍融研究提供瞭試驗依據.將實驗結果應用于西藏玉龍銅礦花崗斑巖邊坡的具體實例中,採用彊度摺減法計算齣瞭礦山邊坡凍融風化前、後的安全繫數,為寒區露採礦山邊坡的穩定性研究提供瞭參攷.
이용서장옥룡동광변파화강반암、회암、석영사암3충전형적견경암석양본진행동융순배실험,근거광구소재지다년기상자료、채장소처자연배경,진행동융온도구간위-20~20 ℃적암석동융순배시험,모의료암석동융과정,연구료포수상태견경암석재동융순배작용하적질량、체적、단축항압강도、항랍강도、동융계수、풍화정도적변화규률,병회출료동융차수여시양적항압강도、항랍강도、동융계수적의합관계곡선,위견경암석동융연구제공료시험의거.장실험결과응용우서장옥룡동광화강반암변파적구체실례중,채용강도절감법계산출료광산변파동융풍화전、후적안전계수,위한구로채광산변파적은정성연구제공료삼고.
The experiment ofcycle of freezing and thawing has been conducted using the rock speci-mens from Tibet Yulong copper mine slope containing granite porphyry,quartzose sandstone and limestone. Experimental temperature has been controlled between -20℃ and 20℃ according to me-teorological data and natural environment of the mine, volume, quality, uniaxial compressive strength, tensile strength, coefficient of freezing and thawing, and the change rule of decay rate of hard rocks have been measured and studied under the condition of water saturated state. The relation curve of freezing-thawing cycles and uniaxial compressive strength, tensile strength, coefficient of freezing and thawing have been fitted using Matlab software. The experimental results have been applied in the slope of the Tibet Yulong copper mine. Safety factors of the slope before and after freezing-thawing test have been calculated and compared by using strength reduction technique. This study can be used for similar mines.
