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2. Some fundamental aspects of face powered support design;Ashwin;Mining Engineer,1975
3. Strata control investigations at a 2.7 m high longwall face using 4/900 tonnes chock shield supports;Aziz,1985
4. Specifications for selected hydraulic powered roof supports with a method to estimate support requirement for longwalls;Barry,1969
5. Strata deformation measurements on longwall coalfaces and their implications for design of powered support systems;Bigby;International Journal of Mining and Geological Engineering,1987