Study of Gob-Side Entry Retaining Technology with Roof Cutting under Upper Roadway Condition

<div>Devices and principle of bilateral bidirectional shaped charge tension blasting technology. (a) Connecting sleeve and shaped charge tube. (b) Blasting principle.</div>

Shock and Vibration

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Figure 3

Figure 3: Study of Gob-Side Entry Retaining Technology with Roof Cutting under Upper Roadway Condition 