پاورپوینت ارزیابی كیفیت اجرایی ماشین های حفاری
قابل ویرایش
تعداد اسلاید : 27
قسمتی از پاورپوینت :
The roadheader production rate and bit costs are controlled by several parameters including:
Rock parameters, such as rock compressive and tensile strength, percent of hard and abrasive mineral content ( i.e. quartz), rock fabric and matrix type, and elastic behavior of rock material etc.
Ground condition, such as degree of fracture (RQD), joint condition, ground water, fault zones, rock mass classification and support requirements etc.
Machine specification, including machine weight, cutterhead power, sumping, arcing, lifting, and lowering forces, cutterhead type(axial or transverse), bits type, size, and other characteristics, number and allocation of bits on the cutter head etc.
Operational parameters, such as shape, size, and length of opening, inclination, sequence of cutting and enlargement operation, number of rock formations in the tunneling path, ground support method, and work schedule meaning of number of shifts per day and days per week etc.
Solution for increasing of performance:
Change in material and design of bits.
Improve the machine design.
Improve the cutterhead design.