矿震和采空区影响下围岩动力响应模型试验

王帅; 张向东; 贾宝新

doi:10.11883/bzycj-2017-0286

矿震和采空区影响下围岩动力响应模型试验

doi: 10.11883/bzycj-2017-0286

辽宁工程技术大学土木工程学院, 辽宁阜新 123000

基金项目:

国家自然科学基金 51774166

国家自然科学基金 51774173

详细信息

作者简介:
王帅(1986-), 男, 博士, 讲师, 62626@163.com

中图分类号: O383;TD324
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- 文章访问数: 4561
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- 被引次数: 0
出版历程
- 收稿日期: 2017-08-21
- 修回日期: 2017-11-08
- 刊出日期: 2019-01-05

Dynamic response experiment of surrounding rocks under influence of mine earthquake and mined-out area

College of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China

摘要

摘要: 为得到矿震与采空区同时存在时围岩动力响应规律，以进一步得到两者耦合致灾机理，采用模型试验方法，进行带孔圆板冲击试验。得到采空区围岩产生与重力无关的负加速度和呈指数增长的切向加速度的试验结果。根据单组试验结果，得到矿震与采空区的耦合致灾机理，包括加剧覆岩沉陷和冒落、中夹岩柱产生指向震源的加速度、上部地表产生水平剪切加速度等结论。综合试验结果，采空区孔径的尺寸效应和矿震动荷载的放缩效应不会影响上述试验结论。
- 矿震 /
- 震波 /
- 采空区 /
- 动力响应 /
- 三下开采
Abstract: To find about the dynamic response patterns of surrounding rock in which mine earthquake and mined-out area exist side by side, and obtain the mechanism leading to disasters under the coupled action of the two, we conducted a percussion test on circular plates having holes and established a model for it. The model test shows that negative acceleration is monitored in the surrounding rock, that the negative acceleration is unrelated with the gravity effect, and that tangential acceleration is also monitored. With the increase of the diameter of the hole, the tangential acceleration around the circular plate exponentially increased. According to the results of the experiment, we arrived at the mechanisms leading to disasters under the coupled action of mine earthquake and mined-out area, including the intensified subsidence and caving in overburden of the goaf, the formation of the horizontal acceleration in shared rock pillars of mined-out area pointing to the source location, the formation of the horizontal shear acceleration in the upper part of the surrounding rock where mine earthquake and mined-out area exist side by side. Comprehensive analysis of the test data, size effect of mined-out area and zoom effect of mine vibration load, do not affect the test results.
- mine earthquake /
- seismic waves /
- mined-out area /
- dynamic response /
- three-underground mining

HTML全文

图 1 建模设计方案

Figure 1. Schematics of modeling design

下载: 全尺寸图片幻灯片

图 2 动荷载试验过程

Figure 2. Process of dynamic loads test

下载: 全尺寸图片幻灯片

图 3 传感器1所在位置径向加速度响应随圆孔直径变化

Figure 3. Radial acceleration response varying with diameter of the round hole at sensor location 1

下载: 全尺寸图片幻灯片

图 4 传感器2所在位置径向加速度响应随圆孔直径变化

Figure 4. Radial acceleration response varying with diameter of the round hole at sensor location 2

下载: 全尺寸图片幻灯片

图 5 传感器3所在位置径向、环向加速度响应随圆孔直径变化

Figure 5. Radial and tangential acceleration response varying with diameter of the round hole at sensor location 3

下载: 全尺寸图片幻灯片

图 6 传感器4所在位置径向、环向加速度响应随圆孔直径变化

Figure 6. Radial and tangential acceleration response varying with diameter of the round hole at sensor location 4

下载: 全尺寸图片幻灯片

表 1 试件混凝土组分用量

Table 1. Concrete mixture dosage of specimen

试件类别	水泥用量/kg	水用量/kg	黄砂用量/kg	石子用量/kg	外加剂用量/kg
实心圆板	8.595 75	3.532 5	11.323 6	24.079 9	0.025 708 8
带孔圆板	8.179 72	3.361 5	10.775 6	22.914 4	0.024 464 4

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表 2 对比试验敲击响应加速度

Table 2. Response acceleration of knocking test on contrast test

传感器	第一轮		第二轮
传感器	a_φ/(m·s^-2)	a_r/(m·s^-2)	a_φ/(m·s^-2)	a_r/(m·s^-2)
1	0	32.88	0	31.52
2	0	29.73	0	29.73
3	0	31.01	0	44.56
4	0	27.71	0	33.26

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表 3 对比试验敲击响应加速度

Table 3. Response acceleration of knocking test on contrast test

传感器	第一轮		第二轮		第三轮		第四轮
传感器	a_φ/(m·s^-2)	a_r/(m·s^-2)	a_φ/(m·s^-2)	a_r/(m·s^-2)	a_φ/(m·s^-2)	a_r/(m·s^-2)	a_φ/(m·s^-2)	a_r/(m·s^-2)
1	0	-8.06	0	-5.77	0	-33.65	0	-25.47
2	0	6.55	0	2.92	0	48.48	0	41.46
3	-3.52	5.41	-3.77	3.04	-20.69	20.72	-42.03	50.86
4	3.92	7.93	12.82	10.21	36.55	16.55	23.87	34.98

下载: 导出CSV

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