工程科学学报，第39卷，第12期：1783-1790,2017年12月 Chinese Journal of Engineering,Vol.39,No.12:1783-1790,December 2017 D0l:10.13374/j.issn2095-9389.2017.12.002:http://journals..ustb.edu.cn 基于SHPB的不同含水状态砂岩动态响应 褚夫蛟2)四，刘敦文》，陶明)，彭怀德) 1)山东理工大学资源与环境工程学院，淄博2550492)中南大学资源与安全工程学院，长沙410083 区通信作者，E-mail:zchu@sina.com 摘要为研究不同含水状态岩石力学性质的变化规律，并保证仅受含水量这一单一因素的影响，以砂岩作为试验材料，制 备饱和系数分别为2.82%、52.11%、100%的干燥、半饱和、饱和三种不同含水状态的岩石试样，进行静载以及8种不同冲击 能量作用下的动力学性质的研究.通过试验可知：在静载作用下，相比干燥岩石，半饱和、饱和岩石试样的应力一应变曲线随 含水量增加出现了峰值明显降低的现象，抗压强度分别降低了8.12%、19.26%.动载作用下，随应变率的增加，3种岩石强度 均呈现不同程度的线性变化，应力一应变曲线出现右移及峰值增加的现象，且干燥岩石与含水岩石在卸载阶段有明显不同的 两种趋势，特别是在卸载第二阶段.而在相同冲击能量作用下，岩石的含水量越大，其破碎程度越大 关键词砂岩：含水状态：动态响应：试样制备：应力一应变曲线：峰值应力：破坏形态 分类号TU45 Dynamic response of sandstones with different water contents based on SHPB CHU Fujiao,LIU Dun-cen2),TAO Ming?,PENG Huai-de2 1)School of Resources and Environment Engineering,Shandong University of Technology,Zibo 255049,China 2)School of Resources and Safety Engineering,Central South University,Changsha 410083,China Corresponding author,E-mail:zxchufj@sina.com ABSTRACT To study the changing law of rock mechanics under different water conditions and to ensure that the water content was the sole factor,sandstone was used as the experimental material.Three different kinds of rock samples were prepared with different moisture states whose average saturation coefficients were 2.82%,52.11%,100%,i.e.,dry,semi-saturated,and saturated.The mechanical properties of the rocks were dynamically tested under the action of static load and eight kinds of impact energy.The experi- mental results reveal that under static load,compared with dry rock,the stress-strain curves of half-saturated and saturated rock sam- ples show decreasing peaks with increasing water content,and their compressive strengths decrease by 8.12%and 19.26%,respec- tively.Under dynamic loading,with increases in strain rate,the strengths of the three samples show a linear change in different de- grees,the stress-strain curves shift to the right,and the peak values increase.The dry and water-bearing rocks exhibit two obviously different trends in the unloading stage,especially in the second stage of unloading.Also,under the same impact energy,as the water content of the rock increases,the degree of fragmentation also increases. KEY WORDS sandstones;water content state:dynamic response:sample preparation:stress-strain curve:peak stress:failure pattern 近年来，岩土工程如雨后春笋般浮现，涉及土木、 手段，由于爆破工程具有经济、高效、快捷的特点，可以 水利、核电、国防、矿产、文保、地下热等与国民生活息 带来巨大的经济效益和社会效益而被广泛应用.地下 息相关的工程.目前，爆破是岩土工程开挖的主要 工程开挖所采用的钻爆法对围岩造成的破坏、损伤和 收稿日期：20170104 基金项目：国家自然科学基金资助项目(51404303)：山东省重点研发计划资助项目(2017CXGC1604)工程科学学报，第 39 卷，第 12 期: 1783--1790，2017 年 12 月 Chinese Journal of Engineering，Vol． 39，No． 12: 1783--1790，December 2017 DOI: 10． 13374 /j． issn2095--9389． 2017． 12． 002; http: / /journals． ustb． edu． cn 基于 SHPB 的不同含水状态砂岩动态响应 褚夫蛟1，2) ，刘敦文2) ，陶 明2) ，彭怀德2) 1) 山东理工大学资源与环境工程学院，淄博 255049 2) 中南大学资源与安全工程学院，长沙 410083 通信作者，E-mail: zzchufj@ sina． com 摘 要 为研究不同含水状态岩石力学性质的变化规律，并保证仅受含水量这一单一因素的影响，以砂岩作为试验材料，制 备饱和系数分别为 2. 82% 、52. 11% 、100% 的干燥、半饱和、饱和三种不同含水状态的岩石试样，进行静载以及 8 种不同冲击 能量作用下的动力学性质的研究． 通过试验可知: 在静载作用下，相比干燥岩石，半饱和、饱和岩石试样的应力--应变曲线随 含水量增加出现了峰值明显降低的现象，抗压强度分别降低了 8. 12% 、19. 26% ． 动载作用下，随应变率的增加，3 种岩石强度 均呈现不同程度的线性变化，应力--应变曲线出现右移及峰值增加的现象，且干燥岩石与含水岩石在卸载阶段有明显不同的 两种趋势，特别是在卸载第二阶段． 而在相同冲击能量作用下，岩石的含水量越大，其破碎程度越大． 关键词 砂岩; 含水状态; 动态响应; 试样制备; 应力--应变曲线; 峰值应力; 破坏形态 分类号 TU45 Dynamic response of sandstones with different water contents based on SHPB CHU Fu-jiao1，2)  ，LIU Dun-wen2) ，TAO Ming2) ，PENG Huai-de2) 1) School of Ｒesources and Environment Engineering，Shandong University of Technology，Zibo 255049，China 2) School of Ｒesources and Safety Engineering，Central South University，Changsha 410083，China Corresponding author，E-mail: zzchufj@ sina． com ABSTＲACT To study the changing law of rock mechanics under different water conditions and to ensure that the water content was the sole factor，sandstone was used as the experimental material． Three different kinds of rock samples were prepared with different moisture states whose average saturation coefficients were 2. 82% ，52. 11% ，100% ，i． e． ，dry，semi-saturated，and saturated． The mechanical properties of the rocks were dynamically tested under the action of static load and eight kinds of impact energy． The experi￾mental results reveal that under static load，compared with dry rock，the stress--strain curves of half-saturated and saturated rock sam￾ples show decreasing peaks with increasing water content，and their compressive strengths decrease by 8. 12% and 19. 26% ，respec￾tively． Under dynamic loading，with increases in strain rate，the strengths of the three samples show a linear change in different de￾grees，the stress--strain curves shift to the right，and the peak values increase． The dry and water-bearing rocks exhibit two obviously different trends in the unloading stage，especially in the second stage of unloading． Also，under the same impact energy，as the water content of the rock increases，the degree of fragmentation also increases． KEY WOＲDS sandstones; water content state; dynamic response; sample preparation; stress--strain curve; peak stress; failure pattern 收稿日期: 2017--01--04 基金项目: 国家自然科学基金资助项目( 51404303) ; 山东省重点研发计划资助项目( 2017CXGC1604) 近年来，岩土工程如雨后春笋般浮现，涉及土木、 水利、核电、国防、矿产、文保、地下热等与国民生活息 息相关的工程［1］． 目前，爆破是岩土工程开挖的主要 手段，由于爆破工程具有经济、高效、快捷的特点，可以 带来巨大的经济效益和社会效益而被广泛应用． 地下 工程开挖所采用的钻爆法对围岩造成的破坏、损伤和