Beberapa kebijaksanaan yang dikeluarkan oleh Pemerintah Indonesia mengenai pertambangan batubara telah memicu peningkatan produksi dan pemakaian batubara yang sangat cepat.
As it was ststed in the policy of the Goverment of the Republic of Indonesia for the Overall Development Planing the Iron and Steel Industry is one of the utmost important plant to be settled in Indonesia.
In the pilot plant of demag-Humboldt-niederschachtofenge-sellschaft a large number of briquetting and low-temperature carbono=izing tests with briquette mixtures based on indonesian coal have been carried out.
Daerah penyelidikan yang mencakup lapangan air laya dan sekitarnya sebagian besar terletak dibagian barat laut dan yang lainnya dibagian timur laut wilayah kuasa pertambangan P.N. Taba. Daerah Penyelidikan tersebut memp[unyai tempat tertinggi 83,46 m diatas muka laut dan yang terendah 15000 m diatas muka laut
the ombilin coal mine is situated in the sawahlunto-sidjundjung district in the province of west-sumatra.The field in which coal is expected to occure occoupics an area of 7,5 x10 km2 with its lengthaxis in north -south direction.
to-day metallurgical eoke is practically exlusively produced from coking coals in horizontal chamber ovens the dimensions of which show a height of 2-6 m, an average chamber width of 350 - 550 mm and a chamber length of ab. 12 m
The eocene (Early Tertiery) coal deposits on The ombilin river in central sumatra have been discovered in 1868 by de greve,mapped in 1875 by verbeek and their extraction was begun in 1892 in the vicinity of sawahlunto.
The geological structure of Sumatra is mirorred on a small scale in the range of islands west of it. it is ummistakable that the tendency of the longitudinal chains of sumatra to subside to the SE is observable again on the long range of islands which lies paralel to sumatra in the SW, separated by a "longitudinal depression" which surpasses by widt…