Caves Below Collapse Dolines - Case Study of Tisova Jama (Eastern Serbia)

Tisova jama (-235 m) je na gori Beljanici (Karpato-Balkanidi) v Vzhodni Srbiji. Vhod vanjo se odpira v dnu udornice (180 × 160 m), pod katero je podzemeljska dvorana z do sedaj največjo znano površino (11 374 m2 ) in prostornino (približno 170 000 m3 ) med jamami v Srbiji. Tako velikost si je mogoče razložiti s prisotnostjo močnega podzemeljskega toka v nedostopnih delih jame. Odnašanje gradiva je porušilo stabilnost kamnine pod vrtačo, kar je povzročilo podiranje in poglabljanje vrtače. The cave Tisova Jama (-235 m) is located on Beljanica Mountain (Carpatho-Balkanides, Eastern Serbia). Its entrance pit is situated at the bottom of a great collapse doline (dimensions 180 x 160 m), below which there is a chamber with the greatest surface (11 374 m2) and volume (approx. 170 000 m3) so far known among Serbian caves. Such dimensions can be explained by the presence of a strong underground stream in the unreachable part of the cave. Removal of the material disrupts the stability of the rock below the doline, which leads to breakdown and deepening of the doline.