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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第29卷    第2期    总第239期    2019年2月

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文章编号:1004-0609(2019)-02-0334-09
一维高静载频繁动态扰动时含铜蛇纹岩能量演化规律
王 春1, 2,程露萍1, 2,王 文1,刘 涛2,韦永恒2

(1. 河南理工大学 能源科学与工程学院,焦作 454000;
2. 中南大学 资源与安全工程学院,长沙 410083
)

摘 要: 采用预加载高轴压、0.4 MPa的冲击气压频繁冲击的方式模拟深部岩石所处的高静载条件下受爆破开挖扰动影响的力学环境,进行一维高静载频繁动态扰动试验。然后基于试验结果探讨冲击扰动前后含铜蛇纹岩伴随主要能量的种类,并在预加轴压时岩石内部损伤不计、冲击扰动后轴压值不变、岩石破碎后内部储能为零的假设条件下,推演各种能量的演算方法,并分析演化规律。结果表明:冲击扰动前后主要伴随的能量为弹性能、入射能、弹塑性能、反射能、透射能、复合释放能;弹塑性能随扰动冲击次数的增加呈幂函数的形式减小;反射能、透射能分别与入射能的比值和复合释放能都随扰动冲击次数的增加而增大,但前者呈线性趋势发展,后者呈对数趋势变化;冲击扰动过程中岩石处于释放能量的状态,且随扰动冲击次数的增加,释放的能量总体上先增大后减小。

 

关键词: 高静载;动态扰动;弹塑性能;冲击次数;单位体积耗能;复合释放能

Energy evolution law of copper-bearing serpentine under one-dimensional high static load and frequent dynamic disturbance
WANG Chun1, 2, CHENG Lu-ping1, 2, WANG Wen1, LIU Tao2, WEI Yong-heng2

1. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
2. School of Resources & Safety Engineering, Central South University, Changsha 410083, China

Abstract:The mechanical environment of deep rock under high static load and frequent dynamic disturbance was simulated with preloading high axial compression and impacting frequently. The one-dimensional high static load frequent dynamic disturbance test was carried out with 0.4 MPa impact pressure. Based on the experimental results,the types of main energy of copper-bearing serpentine before and after the impact disturbed were discussed. Some hypothetical conditions were considered, such as the internal damage of rock was ignored when preloading axial compression, the axial pressure values were invariant after impact disturbance, the internal storage energy was zero after rock specimen break into cuttings, when the calculation methods and evolution laws were analyzed. The results show that the main accompanying energies before and after the impact disturbed are elastic energy, incident energy, elastic plastic energy, reflection energy, transmission energy and composite release energy. The elastic plastic energy increases with increasing disturbance impact times of rock specimen in a power function with a negative exponent. The ratio of reflection with incident energy, the ratio of transmission with incident energy and the composite release energy all increase with increasing of impact disturbance times, but the former shows a linear trend and the latter shows a logarithmic trend. The rock in the impact disturbance process is in the state of releasing energy, and the released energy in general increases firstly and then decreases with increasing of impact disturbance times.

 

Key words: high static load; dynamic disturbance; elastic plastic energy; impact times; unit volume energy consumption; composite release energy

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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