不耦合爆破技术在高应力区域卸压效果

刘志刚; 曹安业; 朱广安; 王常彬; 井广成

doi:10.11883/bzycj-2016-0180

不耦合爆破技术在高应力区域卸压效果

doi: 10.11883/bzycj-2016-0180

刘志刚^{1, 2},
曹安业^{1, 2},
朱广安^{1, 2, ,},
王常彬^{1, 2},
井广成^{1, 2}

1.
中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室，江苏徐州 221116
2.
中国矿业大学煤炭资源与安全开采国家重点实验室，江苏徐州 221116

基金项目:

国家自然科学基金项目 51674253

国家自然科学基金项目 51734009

国家重点研发计划项目 2016YFC0801406

江苏省基础研究计划项目 BK20171191

详细信息

作者简介:
刘志刚(1985-)，男，博士研究生，工程师

通讯作者:
曹安业，caoanye@163.com

中图分类号: O381
计量
- 文章访问数: 5277
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- PDF下载量: 239
- 被引次数: 0
出版历程
- 收稿日期: 2016-06-22
- 修回日期: 2016-10-16
- 刊出日期: 2018-03-25

Stress relieving effect of non-coupling blasting technique on high stress area

LIU Zhigang^{1, 2},
CAO Anye^{1, 2},
ZHU Guang'an^{1, 2
, ,},
WANG Changbin^{1, 2},
JING Guangcheng^{1, 2}

1.
The Ministry of Education Key Laboratory of Deep Coal Resource Mining, School of Mines, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China
2.
State Key Laboratory of Coal Resource and Mine Safety, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China

摘要

摘要: 为了研究不耦合爆破技术在巷道高应力区域的卸压原理及效果，采用室内实验和现场验证相结合的方法开展了研究。研究结果表明：在承压试件的爆破实验中，爆破对承压试件具有明显卸压作用，但由于碎胀应力的存在使爆破后应力恢复速率有所升高，因此提出爆破与排粉预裂钻孔联合卸压方法。对现场高应力区域巷道帮部卸压效果进行验证的结果表明，该方法对缓解巷道近场高应力集中具有较好效果。
- 卸压爆破 /
- 应力集中 /
- 水介质 /
- 不耦合爆破
Abstract: To investigate the stress relieving mechanism and the effect of the non-coupling blasting on the high-stress area in a coal tunnel, we carried out theoretical analysis and laboratory experiment, followed by in-situ verification and numerical simulation. The results show that, in the laboratory experiment, although blasting can obviously relieve its stress in specimen, the existence of the hulking stress results in increasing the stress recovery rate after the blasting. Therefore a stress relieving method was proposed which combines blasting and pre-splitting drilling with discharging pulverized coal; the verification of the stress-relieving effect on the roadway sides in the high-stress area shows that the method can effectively reduce the high-stress concentration near the roadway.
- stress-relieving blasting /
- stress concentration /
- aqueous medium /
- non-coupling blasting

HTML全文

图 1 装药示意图

Figure 1. Schematic diagram of charge in experiment

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图 2 三轴试验装置实物照片

Figure 2. Photo of triaxial experiment apparatus

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图 3 时间-应力-AE累加计数-AE能量曲线

Figure 3. Time-stress-AE accumulative count-AE energy curves

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图 4 应力异常区域示意图

Figure 4. Schematic diagram of abnormal stress area

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图 5 卸压爆破孔布置图

Figure 5. Blasthole layout for relieving stress

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图 6 径向不耦合装药结构示意图

Figure 6. Schematic diagram of the radial non-coupling charge structure

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图 7 爆破后电磁辐射强度曲线

Figure 7. Electromagnetic emission intensity after blasting

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图 8 爆破后煤体应力监测曲线

Figure 8. Stress after blasting

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图 9 模型示意图

Figure 9. Model schematic diagram

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图 10 钻孔附近垂直应力分布图

Figure 10. Vertical stress distribution near the drilling

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图 11 测点垂直应力变化曲线

Figure 11. Vertical stress-time curves at measuring points

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