The size of the robot compared to the size of the borehole might cause it to be stuck part way down the rocky hole which can also damage the camera, warned Murphy.
If it makes it to the mine, the robot could be entangled with the chain-link fence lining the ceiling or be stuck in the mud or rocks on the floor.
"Certainly, if we could find any sign of the miners, that would be terrific," Murphy said.
She noted that if nothing is found, rescuers will also face the difficult task of retrieving the robot back through the hole so it can be lowered into another hole.
The robot took about a week to build and a second device would take a similar time period to construct.
However, the family members of the mine are said to be happy that efforts have continued after emotions flared last week when officials said they intended to call off the search if no positive results appear after the sixth borehole.
"We're very excited about it. The families are thrilled to hear this," said Colin King, the families' lawyer, according to AP.
Meanwhile, the seventh hole was drilled into the "kitchen area" of the mine - an area where miners are trained to run to in case of collapse, according to AP. Workers began the hole Sunday and no estimate has been given on when it will be completed. Previous holes took about two days.
"It brings the hope back up. We needed that and we're going to keep going until we find these guys," said Cesar Sanchez, brother of trapped miner Manuel Sanchez, according to AP.
The six miners have been trapped in Crandall Canyon mine, just outside Huntington, Utah after a "mountain bump" - or the shifting grounds which cause chunks of rocks to fall from the wall - occurred Aug. 6. Two more mountain bumps occurred since the initial cave-in causing with the first causing a delay in rescue efforts and the second one causing three deaths and six injuries during an underground rescue operation.
The missing men are: Luis Hernandez, Manuel Sanchez, Kerry Allred, Carlos Payan, Brandon Phillips and Don Erickson.
