Laserfiche WebLink
50° <br /> X-oo X-,o <br /> 450� <br /> 400) <br /> 350 <br /> i <br /> o <br /> 300 <br /> "17rM fib'' <br /> (Fnctres) b <br /> 250I ' <br /> s I !Ns <br /> 200 ��' o• ! <br /> o15b <br /> 150 o1e <br /> 100 <br /> Dos i <br /> 00 so 100 ISO 200 250 300 350 400 450 500 550 600 650 700 750 900 650 900 <br /> DEPTH fnetresl <br /> Fig. 9.4.2 Relationship of subsidence factor to width and depth of the opening (12). <br /> w Courtes) U.K. National Coal Board. <br />