Rat-hole mining
Rat-hole mining or Rat mining[1] is a process of digging employed in North East India to extract coal, where a narrow hole is manually dug by extraction workers. The practice is banned by the National Green Tribunal;[2][3] however, the techniques are still employed by artisanal mining operations in several parts of India, especially in Meghalaya.[4]
Technique[edit]
Rat-Hole Mining technique is a procedure of digging manually[5][6] wherein the worker involved in extraction can hardly crawl in and out, as a narrow tunnel is dug 3 to 4 feet in depth.[7][8] This technique is basically of two types:
- Side cutting method which is generally followed on slopes of hills by navigating through coal seams deposited on the rock layers and visible on the outer surface of rock and generally in darkish brown or black banded.
- box cutting method which involves digging a round shape or square shape pit with a width of 5 square metre and depth of 400 feets. The method is followed in North Eastern India to extract coal.[9][10]
Bans[edit]
As Rat-Hole Mining involves working in dangerous conditions, causing environmental damage, and causes many accidents involving death and injuries, the technique is criticised and banned in many countries.[11] Rat-Hole Mining is banned in India by National Green Tribunal.[2]
Notable incidents[edit]
2018 Meghalaya accident[edit]
The Meghalaya mining accident happened on 13 December 2018, when 15 miners were trapped in a mine in Ksan, in the Indian state of Meghalaya. While five miners managed to escape, rescue efforts for the remaining 10 continued till 2 March 2019.[12][13][14] The miners were trapped inside the coal mine at a depth of around 370 feet (110 meters) in Jaintia Hills district after digging with the rat-hole mining technique. The tunnel the miners were in flooded with water after they cut into an adjacent mine which was full of water from the nearby Lytein river.[15][16][17]
Service personnel from the National Disaster Response Force (NDRF) and the State Disaster Response Force began operations shortly after the miners were trapped. After a request for assistance from the district administration, teams from Coal India, Kirloskar Brothers, the Indian Air Force and the Indian Navy joined the operation to rescue the miners.2021 incident near Rymbai[edit]
On 21 January 2021 six miners died in an incident in a mineshaft in an area of rat-hole mines in the East Jaintia Hills district of Meghalaya.[18]
Uttarakhand rescue[edit]
In late 2023 rat-hole miners were instrumental in the rescue of 41 workers who were trapped for 17 days after the road tunnel in Uttarakhand that they were digging collapsed.[19][20][21]
See also[edit]
References[edit]
- ^ Operation Rat Mining : Dark Side Of Coal Mining In Meghalaya Exposed |, Youtube: India Today Investigation, January 14, 2019, retrieved 2023-12-03
- ^ a b Kala, Rishi Ranjan (28 November 2023). "Rat hole mining: banned practice saves 41 lives from the collapsed Uttarakhand tunnel". BusinessLine. Retrieved 1 December 2023.
- ^ Sharma, Shweta. "What are 'rat-hole' miners? Controversial specialists brought in for final stretch of India tunnel rescue". Independent UK. Retrieved 2023-12-03.
- ^ Karmakar, Rahul (2023-11-29). "Understanding rat-hole mining". The Hindu. ISSN 0971-751X. Retrieved 2023-12-03.
- ^ "Explained: From rat-hole mining to vertical drilling — methods used at Uttarkashi tunnel". Hindustan Times. 28 November 2023. Retrieved 1 December 2023.
- ^ "Uttarkashi tunnel rescue: How the 12 'rat miners' reached the 41 trapped men". The Economic Times. 28 November 2023. Retrieved 1 December 2023.
- ^ Karmakar, Rahul (29 November 2023). "Understanding rat-hole mining". The Hindu. Retrieved 1 December 2023.
- ^ "What is rat-hole mining, being done to rescue trapped Uttarkashi tunnel workers". The Indian Express. 27 November 2023. Retrieved 1 December 2023.
- ^ "What is rat-hole mining and how it saved trapped Uttarakhand workers?". WION. 28 November 2023. Retrieved 1 December 2023.
- ^ Kaushik, Riddhi (28 November 2023). "Uttarkashi tunnel collapse: What is rat-hole mining & how does it work?". Deccan Herald. Retrieved 1 December 2023.
- ^ "Uttarkashi tunnel collapse: How did 'banned' rat miners end ordeal of 41 workers". mint. 28 November 2023. Retrieved 1 December 2023.
- ^ Karmakar, Rahul (13 December 2018). "13 feared dead in Meghalaya coal mine". The Hindu. ISSN 0971-751X. Retrieved 2018-12-28.
- ^ "Meghalaya mine collapse: Have sought powerful pumps, they will arrive soon, says Coal India". The Indian Express. 28 December 2018. Retrieved 2018-12-28.
- ^ "Rescue Ops On, but No Update on Trapped Miners in Flooded Meghalaya Mine". The Weather Channel. 27 December 2018. Retrieved 2018-12-28.
- ^ Editorial (27 December 2018). "No lessons learnt: on Meghalaya mining disaster". The Hindu. ISSN 0971-751X. Retrieved 2018-12-28.
- ^ "Tests confirm Lytein river water entered coal mine". The Shillong Times. 19 December 2018. Archived from the original on 28 December 2018. Retrieved 2018-12-28.
- ^ "Families of miners trapped in Meghalaya seek miracle". The Times of India. 26 December 2018. Retrieved 2018-12-28.
- ^ Hasnat, Karishma (2 February 2021). "Another year, another mining tragedy — why Meghalaya's 'rat holes' won't stop killing". Retrieved 3 December 2023.
Two years after 15 miners were killed at an illegal coal mine in Meghalaya, six others lost their lives in another accident at another mine in January.
- ^ "How India's 'rat-hole' miners freed 41 tunnel workers". bbc.com. 29 November 2023. Retrieved 1 December 2023.
- ^ "'If 1 dies to save 40 people...': Rat-hole miner on Uttarkashi rescue operation". 29 November 2023. Retrieved 1 December 2023.
- ^ Mishra, Ishita (29 November 2023). "On all fours in 'rat holes', the heroes of Silkyara scrape by on the margins". The Hindu. Retrieved 1 December 2023.