TUNNELLING AND STOPING MACHINE Russian patent published in 1999 - IPC

FIELD: tunnelling machinery, particularly, tunnelling machines designed for driving of horizontal and vertical workings. SUBSTANCE: tunnelling and stoping machine has working member, welded frame structure, pumping plant with hydraulic units, supporting knifes. Machine body is made in form of airtight oil tank with supporting knifes hinged to oil tank front and rear parts. Supporting knifes are provided with hydraulic drawing-apart unit for width of supporting knifes made in form of fixing sliding external support with respect to internal support, and with device for discrete turning of boom-like working member through 270 deg made in form of external holder with holes for fixing rods of hydraulic jacks for turning, and with hydraulic jacks with hydraulic systems for plane-parallel advance of machine in stoping operations by reverse run. Cutting crown may be reduced in length up to 200 mm and in diameter up to 300-400 mm with attachment of bits in bulky web members to increase productivity in driving of mine workings in hard rocks up to 7 units of professor M. M. Protodyakonov's scale. EFFECT: higher efficiency due to simplified design of machine, provision of sufficient stability, maneuverability, possibility of varying thickness of mined coal seam. 2 cl, 2 dwg