Method to Calculate Working Surface Abutment Pressure Based on Key Strata Theory

Table 1

KS parameters.

KS number	E (Gpa)	k (MN/m^3)	q (MPa)	H (m)	l (m)	kc3 (MN/m^3)
KS1	E1 = 8.47	k1 = 37.1	q1 = 0.97	H1 = 12	l1 = 13.5	—
KS2	E2 = 19.3	k2 = 199	q2 = 1.48	H2 = 8	l2 = 17.3	—
KS3	E3 = 19.3	k3 = 114	q3 = 1.03	H3 = 25.9	—	kc3 = 2.51
KS4	E4 = 11.5	k4 = 366	q4 = 10.37	H4 = 222.14	—	—