Surface Movement and Deformation Law Caused by Different Coal Pillar Stagger Distances in Strip Filling IoT-Enabled Sustainable Mining

Algorithm 1

The data aggregation algorithm based on the Euclidian distance.

	Input: Original dataset denoted by points Pi and Pj
	Output: Refined dataset denoted by two points and
(1)	for each element i, j in Pi, Pj
(2)	if j ≤ i or i Ɇ Pi or j Ɇ Pj
(3)	Do nothing [no duplicate data]
(4)	end if
(5)	E d (Pi, Pj) =  (pik–minjk)^2 where pik є Pi and pjk є  Pj
(6)	if Ed (Pi, Pj) ≤ Td then
(7)	Discard either Pi or Pj, to form or
(8)	end if
(9)	return or