Referee Willie Collum dismissed Celtic's James Forrest and Hamilton's Jim McAllister after the break.
After reviewing TV evidence referee Willie Collum decided that he was comfortable with his original decision.
Inside, there were heated exchanges as he sat down opposite Collum Coal Mine Director Xu Jian Rui.
Kingston was dismissed by Collum on 52 minutes, having come on as a replacement just before the interval.
"Collum coal mine has failed to consistently provide employees with approved personal protective equipment" he told a news briefing.
At least 11 workers were injured in the incident at the Collum coal mine in the southern town of Sinazongwe.
The Zambian mining minister, Yamfwa Mukanga, said that the government had cancelled all three licences held by Collum Coal mine.
I'm not going to have a go at Willie Collum, I think he's a smashing referee, but he's made a mistake.
Celtic had also written to the SFA seeking clarification over a spot-kick awarded against them by referee Willie Collum in their defeat by Rangers.
Imrie was brought down by van der Meulen and referee Willie Collum awarded a free-kick as the visiting fans appealed for a penalty.
Clyde were fortunate to survive another penalty claim when Chris Higgins appeared to handle in the area, but referee William Collum was uninterested.
The midfielder was sent off by referee Willie Collum on 49 minutes after catching David Buchanan with a late attempt at a blocking tackle.
Police say the miners had been protesting against poor working conditions at the Collum mine on Friday when the managers opened fire at random.
Dougie Imrie was fouled on the edge of the box by Timothy van der Meulen and referee Willie Collum awarded a free-kick outside the penalty area.
Referee Willie Collum was hoping to avoid controversy in his second high-profile derby within a couple of weeks after being criticised by Celtic for awarding Rangers a penalty.
And referee Collum restored parity of numbers as substitute McAllister saw red after only 35 seconds on the pitch, the midfielder penalised for scything down Celtic full-back Mark Wilson.
And the visitors' task became harder when youngster Forrest was shown a straight red card by referee Willie Collum for a rash challenge on Hamilton's David Buchanan on 49 minutes.
James Forrest opened the scoring from Murphy's pass, but Jefferies claims that video evidence showed that the Irishman was offside and it was this that led the Hearts boss to confront Collum.
BBC: Hearts boss Jim Jefferies reports referee Willie Collum
The Pars full-back escaped with a talking-to from referee Willie Collum but that bruising encounter marked the end of Blackman's involvement and Peter Pawlett was given the chance to create a chance from midfield.
Tam Scobbie glanced a header wide from a corner when he ought to have hit the target and Falkirk paid for that miss after 29 minutes after referee Willie Collum ruled that Kevin McBride had pushed Aiden McGeady.
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