坑道の形状および下盤軟弱層が坑道断面の収縮に及ぼす影響について
坑道断面の収縮に関する基礎的研究 (第1報)
1979 年 95 巻 1101 号 p. 785-789
詳細
1979 年 95 巻 1101 号 p. 785-789
The effects of roadway shape and weak floor on roadway closure were studied with scale model tests, using a sandplastermixture as model rock material.
In addition, the FEM analysis, taking a fracture criterion into consideration, was conducted to compare with thesetest results.
The results of model tests and the FEM analysis indicated the following conclusions:
(1) The thicker the weak floor becomes, or the more the applied pressure increases, the greater the roadway closurebecomes.
(2) When roadway has the weak floor, the formation of fracture zone in the floor promoted the roadway closure.
(3)Circular roadway deformed with less amount than arched and square ones.
(4) The results of FEM analysis coincided with the experimental results qualitatively.
