Published by China University of Mining and Technology Press, 2022
ISBN 10: 756465466X ISBN 13: 9787564654665
Language: English
Seller: liu xing, Nanjing, JS, China
£ 60.34
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Add to basketpaperback. Condition: New. Paperback.Pub Date:2022-12 Pages:148 Language:Chinese Publisher:China University of Mining and Technology Press The western mining areas of my country are rich in thick and extra-thick coal seams. which are suitable for full-thickness mining with large mining height. However. with the increase of mining height. the working face pressure is enhanced. the impact of roof and the frequency of coal wall spalling gradually increase. which puts higher requirements on the key support equipment hydrau.