Research Article
Theoretical and Experimental Study on the Mechanism of Instability and Firing Gas in Hard Quartz Sandstone
Table 1
Time of occurrence of point sparks at different friction velocities and time of gas explosion.
| Friction velocity | | | | | |
| Formative time of fire spark (s) | 1.6533 | 1.503 | 1.837 | 4.4088 | 4.0748 | Formative time of fire bouquet (s) | No fire bouquet | 28.2397 | 4.5758 | 5.6446 | 5.678 | Gas explosion time (s) | No gas explosion | 39.0947 | 22.2945 | 8.9679 | 8.83 |
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