Justification of parameters of working body of deep loosener Asqar Igamberdiyev, Erkin Farmonov, Saydilla Alikulov, G. Usmanova and Zayniddin Sharipov E3S Web of Conf., 365 (2023) 04014 Published online: 30 January 2023 DOI: 10.1051/e3sconf/202336504014