Geothermal Properties of Fan Yaghnab Coal Deposit

2nd International Geothermal Conference, GEOHEAT2018

Gaibullaeva, Z.H.^1 ; Nasymov, G.T.^1 ; Asrorov, B.I.^1

Tajik Technical University Named after Academician, M.S. Osimi Branch, National Research Technological University, MISIS, Dushanbe, Tajikistan^1

关键词: Coal reserves;    Combustion of coal;    Geological exploration;    Mineral raw material;    Mineral water;    Mountain ranges;    Narrow strips;    Oil and gas fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/249/1/012030/pdf
DOI  :  10.1088/1755-1315/249/1/012030

来源: IOP

【 摘 要 】

The Republic of Tajikistan has a mountainous geography with over than 93% of its territory covered by mountains belonging to the highest mountain ranges - Pamir and Tian Shan. As a result of extensive geological explorations, more than 600 oil and gas fields and over 50 types of mineral raw materials sources such as coal, lead, zinc, copper, bismuth, antimony, mercury, precious and semiprecious metals, iron, tungsten, molybdenum, strontium,fluorspar, borates, ornamental and building materials, thermal and mineral water sources have been explored and surveyed. The coal deposit of Fan Yaghnab is the largest in the Republic of Tajikistan and one of the largest in Central Asia. The area of the deposit is about 102 km2. It spreads northwest in a narrow strip form with a length of 24 km and width of 4.5-6 km, and conventionally is divided into 3 parts: The Western, Central and Eastern fields. Administratively, the area of the coal mine Fan Yaghnab belongs to the Ayni district of Khujand region of Tajikistan. It is located on the southern slope of the Zarafshan and the northern slope of the Hisar Ranges in the confluence of the Yaghnab, Iskandar-darya, and Pasrud-darya rivers [1-3]. Tajikistan has more than 4.4 billion tons of potential coal reserves, of which 320.3 million tons are industrial reserves with high-calorie content (Fig. 1). Along with a large reserve of coking coal (259 850 thousand tons) and heat coals (136160 thousand tons) at the Fan Yaghnab deposit, there are geothermal zones formed by the burning of coal stratum for over 500 years. The underground combustion of coal (Figure 2) at the Fan-Yaghnab deposit in Tajikistan is also mentioned by the famous Roman writer-encyclopedist Pliny the Elder, who lived in the first century of our era [2].