Purpose of Program Review. Program Review is a systematic way to assess the quality of SIUE's academic programs and determine ways to improve the quality of education, scholarship, and service.
Sheeting means the members of a shoring system that retain the earth in. position and in turn are supported by other members of the shoring system. See. figure 2.0. Shield (Shield system) means a structure used in an excavation to withstand. cave-ins and which will protect employees working within the shield system.
By applying internal pressure to the entry excavation, such as a longwall face or tailgate entry, the ground response curve can be determined (Esterhuizen and Barczak, 2006). Once this is done, more appropriate design criteria for roof support can be developed.he ground reaction concept is essentially addressing the entire support system, which in longwall mining includes the coal face and gob along with the shield support. The shield does not control the other two; so in fact, there is an upper limit to shield capability.