Conference
Rock Fragmentation by High-Voltage Pulses: Review of Observations and Objectives for the Research
| العنوان: | Rock Fragmentation by High-Voltage Pulses: Review of Observations and Objectives for the Research |
|---|---|
| المؤلفون: | Thenevin, Isabelle, Sellami, Hedi, Dakik, Marwa, Rouabhi, Ahmed, Bru, Kathy, Ménard, Yannick |
| المساهمون: | Centre de Géosciences (GEOSCIENCES), Mines Paris - PSL (École nationale supérieure des mines de Paris), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL), Bureau de Recherches Géologiques et Minières (BRGM), Mines Paris-PSL |
| المصدر: | 16ème Colloque sur les Arcs Electriques CAE 16 https://hal.science/hal-04133328 16ème Colloque sur les Arcs Electriques CAE 16, Mines Paris-PSL, Jun 2023, Sophia Antipolis, France |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2023 |
| المجموعة: | MINES ParisTech: Archive ouverte / Open Archive (HAL) |
| مصطلحات موضوعية: | Rock Fragmentation, High-Voltage Pulse, Observations, [SPI]Engineering Sciences [physics] |
| جغرافية الموضوع: | Sophia Antipolis, France |
| الوصف: | International audience ; The research on the rock-breaking mechanism by electrical discharge began at Tomsk University in the 1960s. Through experiments, Andres (1995) [1] proposed the dependence of the electric breakdown field strength of water, rocks, and oil on the pulse rising time. With a rising time shorter than 500 nanoseconds, the discharge plasma occurs mainly in a sandstone. Otherwise, the discharge occurs in the fluid surrounding it. For a quartzite, this limit is around 200ns, and we know that air is always more conductive than rocks and water. On the ground, after a thunderstorm, especially in deserts of sand, we observe tubes of melted pure silica (Figure 1) composed of Lechatelierite mineral [2]. At the laboratory scale, on rocks, a channel crossing the sample is created. Due to the stress caused by the expansion of the plasma channel, the rock can be fragmented (Figure 2). Several experiments performed to optimize pulse voltage, electrode gap, and the number of pulses will be presented and discussed in the function of the intended applications: drilling hard rocks or rock comminution. |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| Relation: | hal-04133328; https://hal.science/hal-04133328 |
| الاتاحة: | https://hal.science/hal-04133328 |
| رقم الانضمام: | edsbas.530D722A |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |