Underground mining safety risk increases with the more complicated geological conditions in deep strata, so coal mines turn to upper limit of shallow seams under Cenozoic strata. Nevertheless, Northern China coalfield are mainly covered by thicker loose sandy layers abundant water. The analysis overburdened strata deformation properties is essential for safe, efficient, and environmentally frie...

immediate restoration after vital pulp therapy is essential in order to create and maintain effective coronal seal.the aim of this study was to evaluate the shear bond strength of recently used pulp capping materials: white mineral trioxide aggregate (mta), and calcium enriched mixture cement (cem) to composite resin with the use of etch-and-rinse and self-etch adhesive systems and compare them...