Embodiments of the present invention are directed to a method and apparatus
for safety protection control of temporary roof support. In one embodiment, a temporary
roof support has a load sensing member. In another embodiment, a beam structure
of temporary roof support is supported by a load sensing pin. Strain gages are
installed within the pin to measure the load placed upon the pin. An unusually
high load being sensed by the pin indicates that the roof has fractured and the
temporary roof support is supporting loose rock. In one embodiment, when an unusually
high load is measured at the pin, the temporary roof support controls at the front
of the machine are disabled. A second set of remotely located temporary roof support
controls remain operative. In one embodiment, the second set of controls is located
at the rear of the machine.