COMPOSITION FOR BACK-FILLING MATERIAL OR INTERMEDIATE FILLING MATERIAL AND BACK-FILLING MATERIAL AND INTERMEDIATE-FILLING MATERIAL USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a back-filling material or an intermediate-filling material capable of eliminating the difference of property of clay among the producing districts and improving the separation suppressing effect of a material. SOLUTION: In a composition of the back-filling material or the intermediate- filling material used for shielding work and containing cement, water and a thickener, a fiber reinforced plastic pulverized material is used as a part or the whole of the thickener.