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Title: Structural analysis and design of seals for coal mine safety
Authors: McMahon, Gordon W.
Rullán-Rodríguez, José A.
Holmer, Matthew S.
Walker, R. E. (Robert Evans)
O'Daniel, James L.
Britt, James R.
Zipf, Richard K.
Keywords: Coal mines and mining--Safety measures
Structural analysis (Engineering)
Blast effect
Publisher: Geotechnical and Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/GSL TR-14-31
Abstract: This report describes structural analysis and design methods applied to coal mine seals. Three characteristics of coal mine seal design make it challenging and unique, i.e., the pressure-time curves specified for coal mine seal design, the “elasticity of design” requirement, and the seal foundation. An important protective structure design principle to apply in coal mine seal design is that a design should not fail suddenly in a catastrophic brittle mode, but should fail gradually in a ductile mode. A three-step design procedure for coal mine seals is presented that follows design codes and design criteria developed by the military for design of protective structures. The procedure involves (1) design inputs where the design pressure-time curve, material properties, and seal geometry are specified, (2) foundation design where shear forces around the seal perimeter and the required seal anchorage are determined, and (3) seal structure design where the seal thickness and internal seal reinforcement are determined. Design charts for these seal types are developed for the 830-kPa (120-psi) pressure-time curves with instantaneous rise time. The reinforced concrete designs in the chart are able to withstand a worst-case detonation wave; however, the designs are no longer elastic and permanent deformation occurs.
Description: Technical Report
Gov't Doc #: ERDC/GSL TR-14-31
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Technical Report

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