Ground Stress Distribution and Dynamic Pressure Development of Shallow Buried Coal Seam Underlying Adjacent Room Gobs

Table 2

Loading and geometric parameters of different zones in the gob of the coal seam 2⁻².

Different coal pillars	M1	M2	M3	M4	M5	M6	M7	M8
q	λ1q0	λ2q0	λ2q0	λ2q0	λ2q0	λ2q0	λ2q0	λ1q0
a	20	20 + L1 + L2	…	…	…	…	…	20 + L1 + 7L2 + 6L3
b	20 + L1	20 + L1 + L2 + L3	…	…	…	…	…	20 + L1 + 7L2 + 6L3 + L4