Study on temperature field of the drilling machine during the course of drilling in coal mine

• 来源期刊: 煤炭学报（英文版）
• 年，卷（期）: 2006,（1）
• 页码范围: 60-63
• 页数: 4页
• 语种: 英文

摘要

The working conditions of the MK-3 type full hydraulic tunnel drilling machine during the course of drilling were analyzed. Based on the energy balance governing equations for the drill rod, the temperature field of drill rod at the normal and non-normal working conditions was numerically obtained. The numerical results show that the maximum temperature at the head of drill rod under the normal working circumstance is insufficient to ignite the gas. But under the non-normal working condition, the local high temperature can ignite the gas easily and cause the fire. In order to prevent the gas fire, the occurrence of the non-normal operating condition must be prevented as far as possible during the drilling.