Abstract The energy transformation and heating-up mechanism in the course of the rock ram are analyzed，and the theoretical heating-up formula is acquired. At the same time，the heating-up of marble and sandstone in the course of rock ram are measured by the TVS–2000MKII thermal-image formation system，and then the relation curves of heating-up and quality of rock and those of heating-up and contacting angle are acquired. It is concluded that there are three major factors，that is fracturing of rock，friction and compression of rock，during the rock ram.
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Received: 05 December 2003
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