Discrete Element Simulation of Roadway Stability in an Efflorescent Oxidation Zone

Table 2

Borehole parameters and the efflorescent oxidation zone thickness on the number 39107 working face.

Identifier	Location	Ground elevation (m)	Thickness of erosion (m)	Thickness of bedrock (m)	Interval of efflorescent oxidisation (m)	Vertical distance between the ground and the number 9 coal seam (m)	Notes
OX-104	Outside of the mining area	1437.58	27.00	111.12	134–140	138.12	The number 9 coal seam and overlying strata are all in the efflorescent oxidisation zone
OX-105		1415.92	18.89	113.81	128–138	132.70
110–130	Within the mining area	1392.98	27.00	98.53	86–93	125.53	The local area surrounding the number 39107 roadway is in the efflorescent oxidisation zone
W-3		1379.73	26.10	133.9	132–140	160.0