A Novel Surface Subsidence Prediction Model Based on Stochastic Medium Theory for Inclined Coal Seam Mining

Table 1

Information of coordination systems.

Coordinate system	Origin of coordinate	Direction of coordinate system
Working face rectangular coordinate system (soz)	Point o at the bottom plate of the downhill boundary of the mining area	The s-axis is in the horizontal direction and the z-axis is in the vertical direction
Working face body following coordinate system (uov)	Point o at the bottom plate of the downhill boundary of the mining area	The u-axis points from the downhill direction to the uphill direction along the coal seam, and the v-axis points upward along the normal direction of the coal seam
Surface rectangular coordinate system (xOw)	Corresponding point O of point o on the surface	The x-axis points to the horizontal direction of the surface, and the w-axis points to the vertical direction downward