DEVICE TO INVESTIGATE PHYSICAL PROPERTIES OF SPECIMENS OF ROCKS Russian patent published in 2004 - IPC

FIELD: mining industry, examination of physical properties of rocks presented in the form of cores. SUBSTANCE: device has chamber with core holder, system feeding and discharging fluid, system forming reduction pressure, measurement system. Fluid feeding system is connected to chamber through valve which has elements directing and shutting off flow made of electric insulation material. Chamber includes body, immobile face bushing sealed with sealing ring, hollow rod connected to fluid feeding system through valve, mobile face bushing with central hole for rod, outer guiding bushing made of electric insulation material with central hole uniaxial to hollow rod, linked to mobile face bushing, inner guiding bushing made of electric insulation material with central hole uniaxial to hollow rod tightened by sealing ring, connected to mobile face bushing, mobile face electrode with central duct connected to hollow rod. Core holder is produced from elastic sheath which one end tightly embraces hollow electrode and which other end tightly embraces immobile face bushing. Internal space of core holder limited by them communicates with hollow rod and space limited by external surface of elastic sheath and internal walls of chamber body is connected to system forming reduction pressure. Shut-off element can come both in the form of plunger capable of reciprocating motion and control valve capable of turn through certain angle. Device can be fitted with thermostatting unit, temperature sensitive element and electron unit determining specific electric resistance of cores. EFFECT: decreased measurement errors. 5 cl, 5 dwg