Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting

Joint Authors

Xia, Binwei
Lu, Yiyu
Liu, Chengwei
Gao, Yugang

Source

Shock and Vibration

Issue

Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-8, 8 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2018-12-16

Country of Publication

Egypt

No. of Pages

8

Main Subjects

Civil Engineering

Abstract EN

Air is commonly used as the noncoupling borehole medium in directional slot blasting where the quasi-static pressure is small, the energy utilization rate of the explosive is low, and the breaking efficiency of the coal-rock mass is not high.

This study investigates the effect of quasi-static pressure on crack propagation in closed-field blasting.

Crack length propagation in the quasi-static pressure stage accounts for more than 60% of the total crack length.

Water is therefore proposed as the noncoupling medium of the slotting borehole to increase the quasi-static pressure.

A series of experiments was performed to investigate and compare quasi-static pressures generated using noncoupled water-medium blasting and noncoupled air-medium blasting.

The experimental results show that the quasi-static pressure is 37–46 times larger in water-medium blasting than in the air-medium case.

The experimental measurements show good agreement with theoretical analysis.

The results show that the energy utilization rate of the explosives in the hydraulic slotting blasting is high with a notable energy storage effect, and that the fracturing range can be significantly increased.

Additionally, fracture by directional blasting using this approach can be more controllable.

American Psychological Association (APA)

Liu, Chengwei& Xia, Binwei& Lu, Yiyu& Gao, Yugang. 2018. Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting. Shock and Vibration،Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1215392

Modern Language Association (MLA)

Liu, Chengwei…[et al.]. Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting. Shock and Vibration No. 2018 (2018), pp.1-8.
https://search.emarefa.net/detail/BIM-1215392

American Medical Association (AMA)

Liu, Chengwei& Xia, Binwei& Lu, Yiyu& Gao, Yugang. Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting. Shock and Vibration. 2018. Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1215392

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1215392