The initiation of microcracking occurred along the bedding plane, and it gradually runs through the bedding plane and causes the specimen destruction, resulting in an approximately parallel layered block.
where [[lambda].sup.x.sub.eff] is the effective thermal conductivity vertical to the bedding plane direction; [[lambda].sup.y.sub.eff] and [[lambda].sup.z.sub.eff] are the effective thermal conductivities parallel to the bedding plane direction; T is the particle temperature.
Xian and Tan  have carried out a theoretical investigation on the layered rock masses under static loading, indicating that the bedding plane and filling materials have straightforward effects on the failure mechanism.
The core features a complete and solid Aries 2 Seam of 3.35m thickness with no structural indications other than the occasional bedding plane. This core will deliver approximately 150kg for the advance testing process.