高轴压和围压共同作用下受频繁冲击时含铜蛇纹岩能量演化规律

王春; 程露萍; 唐礼忠; 王文; 刘涛; 韦永恒

doi:10.11883/bzycj-2018-0076

高轴压和围压共同作用下受频繁冲击时含铜蛇纹岩能量演化规律

doi: 10.11883/bzycj-2018-0076

王春^{1, 2, 3,},
程露萍¹,
唐礼忠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，河南焦作 454000
2.
中南大学资源与安全工程学院，湖南长沙 410083
3.
煤炭安全生产河南省协同创新中心，河南焦作 454000

基金项目: 国家自然科学基金（51604093）；河南省高校重点科研项目（18A440014）；河南理工大学博士基金（672707）；河南省重点研发与推广专项（科技攻关）项目（192102310247）；深井瓦斯抽采与围岩控制技术国家地方联合工程实验室开放研究基金（SJF201803）

详细信息

作者简介:
王　春（1986－　），男，博士，讲师，wczy115728@163.com

中图分类号: O347; TU45
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- 被引次数: 0
出版历程
- 收稿日期: 2018-03-13
- 修回日期: 2018-08-20
- 网络出版日期: 2019-04-25
- 刊出日期: 2019-05-01

Energy evolution law of copper-bearing serpentine received frequent impact under common action of high axial compression and confining pressure

1.
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China
2.
School of Resources & Safety Engineering, Central South University, Changsha 410083, Hunan, China
3.
The Collaborative Innovation Center of Coal Safety Production of Henan, Jiaozuo 454000, Henan, China

摘要

摘要: 探讨高轴压和围压共同作用下频繁冲击扰动试验过程中伴随主要能量的种类，并推演冲击扰动前后弹性能、塑性能等能量的计算公式；采用预加载围压、高轴压、0.5 MPa冲击气压模拟深部岩体承受的水平应力、垂直高应力及爆破开挖扰动的影响开展动力学试验，并基于试验结果分析含铜蛇纹岩的动力学特征及能量演化规律。研究结果表明：含铜蛇纹岩能承受的扰动冲击次数随轴压增大而减小，随围压增大而增大，且动态峰值应力随扰动冲击次数增加而减小；随扰动冲击次数的增加，岩样伴随的弹性能先增大后趋于减小，伴随的塑性能呈增大的趋势发展，反射能和入射能的比值与透射能和入射能比值的变化规律相反，前者呈增大趋势，后者呈减小趋势；单位体积吸(释)能随扰动冲击次数的增加呈下凸曲线趋势变化，其均值随围压增大先减小后增大，随轴压增大而减小。
- 高轴压 /
- 围压 /
- 频繁冲击 /
- 弹性能 /
- 塑性能
Abstract: Under the common action of high axial stress and confining pressure, the main types of energy were discussed in the study of frequent dynamic disturbance firstly. At the same time, the formula for calculating elastic energy, plastic energy are deduced before and after the impact disturbance. In order to conduct dynamic test, the horizontal stress, the vertical stress, the influence of blasting excavation disturbance of the deep rock mass were simulated by pre-confining pressure, pre-high axial stress, 0.5 MPa impact pressure, respectively. Based on the experimental results, the dynamic characteristics and energy evolution of the copper serpentine were analyzed. The results show that the cumulative disturbance impact times of copper snake-like rock decrease with the increase of axial pressure, while they increase with the increasing confining pressure, and the dynamic peak stress decreases with the increasing number of disturbances. As the number of disturbances increases, the elastic energy in the rock sample increases first and then decreases, the plastic energy shows a trend of increase, and the ratio of the reflection energy to the incident energy increases while the ratio of the transmission energy to incident energy decreases. The unit volume absorption (release) energy shows the trend of the lower convex curve with the number of disturbances increases. In addition, the averages of unit volume absorption (release) energy decreases first and then increases with the increasing confining pressure, but decreases with the increase of axial pressure.
- high axial compression /
- confining pressure /
- frequent impact /
- elastic energy /
- plastic energy

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图 1 SHPB实验加载系统

Figure 1. Loading system of SHPB

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图 2 实验加载力学模型示意图

Figure 2. Sketch map of mechanical model under test load

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图 3 三轴压缩条件下含铜蛇纹岩的应力-应变曲线

Figure 3. Stress-strain curves of copper-bearing serpentine under triaxial constringent compression

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图 4 冲击气压与冲头速度关系示意图

Figure 4. Relational diagram of impact pressure and punch speed

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图 5 动态应力-应变曲线随冲击次数的变化规律

Figure 5. Change of dynamic stress-strain curves with impact times

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图 6 圆柱形岩样与方形岩样同体积等效示意图

Figure 6. Same volume equivalent diagram of cylindrical rock sample and square rock sample

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图 7 冲击伴随弹性能密度、塑性能密度计算关系图

Figure 7. Calculation diagram of elastic energy density and plastic energy density under impact load

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图 8 冲击伴随弹性能随扰动冲击次数的变化规律

Figure 8. The change law of elastic energy produced by impact load with disturbance impact times

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图 9 冲击伴随塑性能随扰动冲击次数的变化规律

Figure 9. The change law of plastic energy produced by impact load with disturbance impact times

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图 10 反射能与入射能比值随扰动冲击次数的变化规律

Figure 10. Change law of the ratio of reflection to incident energy with disturbance impact times

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图 11 透射能与入射能比值随扰动冲击次数的变化规律

Figure 11. Change law of the ratio of transmission to incident energy with disturbance impact times

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图 12 单位体积吸（释）能随扰动冲击次数的变化规律

Figure 12. Change law of unit volume absorption (release) energy with disturbance impact times

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图 13 单位体积吸（释）能均值随预加围压或轴压的变化规律

Figure 13. Change laws of the mean value of energy absorption (dissipation) per unit volume with preload confining pressure or axial pressure

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表 1 深部含铜蛇纹岩三轴压缩实验结果

Table 1. Test results of deep copper-bearing serpentine under triaxial constringent compression

岩样编号	围压/ MPa	围压加载速率/ （mm·s⁻¹）	轴压加载速率/ （MPa·s⁻¹）	三轴抗压强度/ MPa
SW1-1	5	0.03	0.05	142.87
SW1-2	10	0.03	0.05	171.90
SW1-3	15	0.03	0.05	185.36
SW1-4	20	0.03	0.05	208.04
SW1-5	25	0.03	0.05	225.76
SW1-6	30	0.03	0.05	249.02

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表 2 高轴压和围压共同作用下频繁动态扰动实验结果

Table 2. Results of frequent dynamic disturbance test under combined action of high axial pressure and confining pressure

实验分组	岩样编号	预加围压/MPa	预加轴压/MPa	冲击气压/MPa	累计冲击次数
1	S1-1	15	100	0.5	21
	S1-2	15	120	0.5	19
	S1-3	15	140	0.5	13
	S1-4	15	160	0.5	12
2	S2-1	20	100	0.5	23
	S2-2	20	120	0.5	21
	S2-3	20	140	0.5	16
	S2-4	20	160	0.5	13
3	S3-1	25	100	0.5	26
	S3-2	25	120	0.5	22
	S3-3	25	140	0.5	18
	S3-4	25	160	0.5	15
4	S4-1	30	100	0.5	31
	S4-2	30	120	0.5	24
	S4-3	30	140	0.5	20
	S4-4	30	160	0.5	17

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