[3] Coal mining completely changed the economy and demography of the region, becoming its main economic means and facilitating the installation of infrastructures for its transport, such as La Robla Railroad and the Barruelo–Quintanilla de las Torres railway branch.
It was the country's main source of energy during the autarky of the 1950s, but from the 1960s onwards it began a period of recession when it was replaced by other hydrocarbons, and received its final blow with Spain's entry into the European Economic Community in 1986, which led to the closure of all unprofitable installations.
The Carboniferous system, which extends for about 55 km in a SW-NE direction through the north of the province of Palencia, is characterized by the presence of series of sediments with important facies variations.
[13] According to a study published in the specialized journal Geogaceta in 2006, coals from the Guardo-La Pernía area reach the anthracite grade depending on their volatile matter content.
The appearance of the steam engine, the driving force of the industrial revolution that began in the second half of the 18th century, increased the world's consumption of fossil fuels, especially coal.
[20] The versatile Ricardo Becerro de Bengoa attributes in his writings the discovery of coal in the Montaña Palentina to the parish priest of Salcedillo, Ciriaco del Río, in 1838.
[22] After verifying that the mineral burned and kept the heat, he ascertained the presence of greater quantities, contacting the mining company Collantes of Reinosa to begin the exploitation of the deposit.
[25] This system made the final price of the product considerably more expensive, so the construction of the Barruelo-Quintanilla de las Torres railway branch was undertaken, which linked with the Palencia-Santander railroad and was put into operation in December 1863.
[30] The other great center of the Palencia anthracite, Velilla del Río Carrión, would not experience its definitive hatching until a few years later, although the presence of several layers in its vicinity had already been confirmed.
After the study of possible variants, the final project, which linked the towns of La Robla in León and Balmaseda in Biscay, the work of the prestigious mining engineer from Guipuzcoa, Mariano Zuaznavar, was presented to the Cortes on 26 November 1889.
The great demand caused by the cessation of exports from large producers such as the United Kingdom, added to the improvement in local infrastructures, especially thanks to La Robla railroad, which ran through practically the entire basin, allowed the sector to experience a boom for which it was not prepared, so prices skyrocketed.
In the summer of 1934, in the towns of Barruelo and Guardo, there were rallies of socialist militants with thousands of attendees from the provinces of Palencia, León and Santander, which constituted a great demonstration of strength.
On 5 October, the miners of Barruelo took up arms and took control of the town, resulting in the death of a lieutenant colonel and two members of the Civil Guard, as well as the director of the Colegio Marista,[48] Plácido Fábrega Juliá, known as Brother Bernardo and beatified by the Catholic Church in 2007.
[54] The repression of the miners and the suppression of their unions meant that the Civil War did not have great repercussions in the area, which quickly fell into the hands of the rebel side.
[56] The autarky established by Franco's regime, forced by the international isolation to which it was subjected in its early years, resorted to coal as the main source of energy, so the basin was greatly favored, experiencing significant progress during the 1950s.
But in 1967, alleging the failure of the State to comply with the agreements reached, the company declared the total crisis of the facilities and requested the Labor Delegation to close them and dismiss all its employees.
In Guardo, the miners blocked the accesses by road and the entrance to the railroad at the Velilla thermal power plant, leading to confrontations with the anti-riot troops sent to the area.
[67] Despite being considered essential by the businessmen for the survival of the sector, the open-pit mines aroused from the beginning the mistrust of part of the population, who, through anti-cutting coordinators, opposed the projects, arguing ecological reasons.
[69] In October 1998, Hullas de Barruelo became part of Unión Minera del Norte (UMINSA), owned by the Victorino Alonso group, which controlled most of the mining operations in the north of the country.
In Velilla del Río Carrión, in 2007, work ceased in "El Abuelo", concentrating the activity in the Las Cuevas shaft, located next to the border with the province of León.
[4] The future of the activity was uncertain when the European Union proposed to maintain public aid to the sector until 2014, on the condition that all the loss-making farms, including all those in Asturias, León and Palencia,[75] would close that year.
The fear of the disappearance of the activity in the Palencia basin led the Junta of Castile and León to ally with the employers and trade unions seeking the support of the Government to try to rectify this proposal of the European Commission.
[78] The miners abandoned the blockade 27 days later, on 29 September, when the European Commission authorized the Spanish government to subsidize electricity companies that use indigenous coal for their production.
The most serious accident in its history occurred in the famous Pozo Calero de Barruelo, when on 21 April 1941, 18 miners died and another 19 were injured due to a firedamp explosion.
According to the archives of the mining section of the Territorial Service of Industry, Commerce and Tourism of the Junta of Castile and León, between 1956 and 1997 alone, 116 miners died in this area as a result of occupational accidents.
One of the greatest experts on the subject, the Palencia physician Silvano Izquierdo, defined this disease as "a pulmonary fibrosis caused by the prolonged inhalation of siliceous dust".
In 2006, the president of UMINSA, Victorino Alonso, presented a proposal to the town council of Guardo demanding the open-pit exploitation of 500 ha within the municipality, committing himself to hire all the local youth.
[103] The local Anti-Cutting Platform mobilized to warn of its distrust of the proposal and the full council unanimously decided to reject the offer,[104] in addition to declaring protected all public forest in the municipality to prevent future clearing.
The first substantial modification it produced in its social environment was the transformation of a society dedicated in a high percentage to agriculture and animal husbandry, which started to massively adopt mining as a means of subsistence.
[111] Another phenomenon that took place, as opposed to the previous one, and profusely studied in literary circles, was that of workers' associations, which began in 1900, when the syndicate La Unión was created in Barruelo de Santullán.