The Pike River Mine disaster was a coal mining accident that occurred on 19 November 2010 in the Pike River Mine, northeast of Greymouth, in the West Coast region of New Zealand's South Island. It began with a methane explosion at approximately 3:44 pm (NZDT, UTC+13). The accident resulted in the deaths of 29 miners.
At the time of the explosion, 31 miners and contractors were below ground. 16 miners and 13 contractors were believed to be located at least from the mine's entrance, while two miners managed to walk from the mine and were treated for moderate injuries. Subsequent explosions on 24, 26 and 28 November ended hopes of any further survivors and raised serious doubt that any bodies would ever be recovered.
In December 2012, Prime Minister John Key said he would apologise in person to the families of those killed for the Government's weak regulations and inadequate inspection regime. In 2017, the Government established the Pike River Recovery Agency, with re-entry expected by March 2019. It reported to the Minister Responsible for Pike River Re-entry, Andrew Little. Re-entry was expected to cost NZ$23 million over three years. In February 2021, the agency reported that it had reached a point 2.2km up the mine access tunnel, the furthest point into the mine that the agency planned to go. The work to this point had cost approximately $50million. In March 2021, Little stated that it was too difficult and too expensive to go any further into the mine.
The incident was New Zealand's worst mining disaster since 1914, when 43 men died at Ralph's Mine in Huntly. It was the country's worst loss of life in a single disaster since the 1979 crash of Air New Zealand Flight 901, although it was surpassed three months later by the February 2011 Christchurch earthquake. The accident led to significant changes in occupational safety legislation, with passage of the Health and Safety at Work Act 2015 and the establishment of WorkSafe New Zealand.
Accident and response Explosions The first explosion is believed to have occurred at around 3:44 pm on 19 November 2010. Methane may have accumulated in a void formed during earlier mining activities, then been expelled into the rest of the mine by a roof fall, or it may have accumulated directly in working areas of the mine. It is not known what sparked the explosion, but a working mine contains several possible ignition sources. Two miners managed to walk from the mine later the same day, having been in the access tunnel, or just off it, some distance from the source of the explosion. Both were taken to Greymouth Hospital suffering moderate injuries.
Initial media reports were unclear as to the number of miners and contractors remaining within the mine, with various numbers between 25 and 33 being mentioned. It was eventually ascertained that there were 16 miners and 13 contractors trapped. The names of the missing workers were released on 21 November 2010.
Mine officials noted that every worker carried a self-rescue device providing 30 minutes of air, and fresh air bases were provided within the mine for them to escape to in the event of an emergency; however, the refuges were empty and there was no evidence of miners attempting to reach them. When a borehole was drilled into the area where the miners were thought to be, a level of 95% methane was found, with the remainder primarily carbon monoxide. It appeared there was little chance that any of the miners who may have survived the blast could still be alive. Although families had held out hope that some of the miners may have survived, it was believed by the rescue team that all had been killed by the initial explosion. The mine had not collapsed and air was blowing freely throughout the tunnels indicating that there were no obstructions to survivors leaving the mine or indicating their presence by tapping on pipes or calling for help.Claire Harvey Never a Hope: This was not going to be Chile The Advertiser 28 November 2010 Pg 41–42 47–48
A second explosion occurred at 2:37 pm on 24 November 2010. Police Superintendent Gary Knowles stated that he believed no one could have survived. According to the CEO of the Pike River mine, Peter Whittall, the explosion was not caused by anybody working in or around the mine. The second explosion sent smoke, soot and explosive gases up a mine shaft where a team of rescue staff had been taking samples; the noise of the rising explosion provided them enough warning to get clear, evacuating the area on foot.
A third explosion occurred at 3:39 pm on 26 November 2010; it appeared to be smaller than the first two. A fourth significant explosion ignited the coal within the mine; the subsequent fire was visible above the ventilation shaft; the steel structure above the shaft was damaged and neighbouring scrub set alight. The fire appeared to be located near the bottom of the shaft, burning either loose coal or the seam itself, and considerably complicated efforts to stabilise the mine and made recovery of "intact" bodies unlikely.
Gas monitoring The initial explosion damaged the mine's gas drainage line, causing methane gas to begin accumulating in the mine immediately. As there may have been a potential ignition source, it was too dangerous for rescuers to enter the mine.
It was originally predicted to take several days before the mine was safe enough for rescuers to enter, as the gases inside were feared to be explosive. Initial testing at the mine ventilation shaft was hindered by heavy clouds, preventing helicopter access, and staff were going to have to walk in over rough terrain, as the shaft does not have road access.
Seismic equipment was attached to tubes at the tunnel mouth to detect movement in the mine.
With tests still not giving clearance for rescuers to enter the mine, an attempt was made to enter the mine using a bomb disposal robot provided by the New Zealand Defence Force (NZDF). The robot failed only into the mine due to water ingress. Sources noted that while the robot was capable of operating in rain, it had "effectively [been] hit by a waterfall", short-circuiting it. A second NZDF bomb disposal robot was placed on stand-by to enter. This robot had been fitted with extra batteries and other equipment to try to avoid the problems which hit the first robot. It was later deployed, and the first robot was later restarted. The robots entered the mine on 23 and 24 November 2010, while a third, from Australia, was en route to the site. The use of three robots was unprecedented in mine rescue. The use of United States mining rescue/exploration robots was also being considered though the second explosion later that day effectively ended the robot efforts.
Early on 24 November 2010, it was reported that a drill started from above the horizontal mine had reached to the mine chamber, releasing hot gas. Later in the day, it was reported analysis showed 95% methane. A camera, inserted into a safe haven in the mine, found no evidence of human activity.
Rescue response
In accordance with the protocols established in New Zealand's Co-ordinated Incident Management System, the emergency response was led by New Zealand Police – in this case Superintendent Gary Knowles, District Commander of the Tasman region. In addition to police, "Operation Pike" involved staff and management from Pike River Coal Ltd, the company operating the mine (represented at media and family conferences by CEO Peter Whittall), mine rescue experts from New Zealand and Australia, the Red Cross, ambulance services, the New Zealand Defence Force, and the Fire Service. The recovery phase was led by Inspector Mark Harrison, with Knowles in charge overall.
A welfare centre was set up at the Red Cross Hall in Greymouth for the families of the missing men. Police encouraged families to use this centre rather than trying to reach the mine's access road, which was closed to everyone except emergency services. After several days of delays in entering the mine, some locals expressed anger at what they considered the undue cautiousness of the rescue teams, noting that in historical accidents the rescue efforts were undertaken by fellow miners. In response to the continued criticism from various media and local families for their refusal to send rescuers into the mine, Trevor Watts, leader of the Mines Rescue, explained the team's belief that any rescuers would have also been killed given the conditions within the mine. Their cautious approach was supported by many international mine rescue experts.
Both the Australian and New Zealand stock exchanges placed trading halts on Pike River Coal (PRC) shares following the first explosion to allow the company time to "provide the market with a detailed update". PRC's largest shareholder New Zealand Oil & Gas, which owned 29.4%, was also placed on a trading halt for two days; upon reinstatement the shares lost 29% of their value. PRC's shares were halted for 13 days. On 2 December 2010, when New Zealand held a nationwide moment of silence, including at the stock exchange, PRC's suspension was inadvertently allowed to end and about 200,000 share trades were later invalidated.
The first explosion was classified as a "highly, highly irregular event", and the New Zealand Prime Minister John Key immediately announced the government would hold an inquiry into its cause. It was later announced that the government would appoint a Royal Commission of Inquiry. In addition, the police and the coroner would conduct investigations – as required by law – as would the Department of Labour.
Recovery operation A Górniczy Agregat Gaśniczy (GAG) unit from Queensland, accompanied by 16 crew from Queensland Mines Rescue Service, was brought in on 26 November 2010 by the RNZAF, to be used in an attempt to suppress the fires. It was expected to take three days to assemble, and about five days for the fire-retardant emitted from the unit to fill the mine.
On 10 December 2010, Police Commissioner Howard Broad said that the police intended to hand control of the recovery operation at the mine to the company. On 13 January 2011, Howard Broad told a media conference that the recovery of the bodies of the miners would be halted as it was impractical and too unsafe. Responsibility for securing the mine would be left with the receivers of Pike River Coal.
On 14 January 2011, the police announced that the mine had been sealed as it was too dangerous to continue efforts to retrieve the bodies of the missing miners and contractors. On 17 January 2011, the receivers advised the police that their plan was to spend the next five to eight weeks stabilising the atmosphere in the mine and the underground heat sources. The plan did not include recovery of the bodies of the deceased miners. On 17 January 2011, it was further confirmed that recovery of the bodies was unlikely. On 9 March 2011, the receivers took control of the mine from the New Zealand Police. During inspection and recovery attempts, five robotic vehicles have been sent into the mine, but all failed within the mine, for reasons such as water ingress into their electronics, or getting stuck.