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Book Description paperback. Condition: New. Paperback.Pub Date:2021-09-01 Pages:207 Language:Chinese Publisher:China University of Mining and Technology Press For the technical problems encountered. the research method combining field observation. laboratory test. theoretical analysis and numerical simulation calculation is used to summarize and propose the gas gushing law of low permeability coal seam. the deformation mechanism and supporting technology of surrounding rock in the roadway of soft coal seam. and the low permeability coa. Seller Inventory # AMZ078448_NX027799_078448