Mine Supports And Strata Control - Study Mode

[#281] Which type of prop is superior in yeilding type of props.
Correct Answer

(B) Hydraulic prop

[#282] On account of the weight of the rocks the pressure arch is transmitted to abutment if the depth of the seam is . . . . . . . . the length of the pressure.
Correct Answer

(C) Twice

[#283] The wooden piece placed on top of prop called
Correct Answer

(C) Lid

[#284] Angle of internal friction of soil does not exceed
Correct Answer

(C) 30°

[#285] At what depth ratio of goaf in u/g, it causes maximum possible subsidence at more than one point in overlying ground surface.
Correct Answer

(A) Normal