FIELD: mining industry; applicable in laying of engineering services under obstacles. SUBSTANCE: device has a reamer in the form of body of revolution. The reamer has circular hollow which separates the reamer working surface into two sections. Maximum diameter of the first section is less than 0.25 and not more than 0.75 of maximum diameter of the second section. The device also has an appliance for supply of thixotropic solution under pressure and is communicated with the reamer circular hollow and rod for transmission of pulling force of torque of the reamer. EFFECT: reduced labor input due to reduced volume of operations for cleaning of hollow of expanded hole from ground. 7 cl, 3 dwg
