This standard specifies the type test methods and inspection rules for static plows for the working surface of long-wall underground mining of coal mine.
This standard is applicable to the type test of the land-based complete machine and the gearbox of coal plowing unit of the static coal plow (hereinafter referred to as "plow") used in the working surface of long-wall coal mining.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all the editions listed are valid. All standards are subject to revision, and all parties to agreement based on this standard are encouraged to the possibility of applying the most recent editions of the standards indicated below.
GB/T 6404-86 Determination of Sound Power Level for Noise Emitted by Gear Units
MT/T 101-93 Inspecting Specification for Gearbox of Chain Conveyors
Coal Mine Safety Regulations (Edition 1992)
3 Type test Objects
The type test shall be carried out on the plow and its gearbox which meet one of the following conditions.
a) a new trial product with a novel overall structure;
b) where the overall structure of the product changes significantly enough to affect the product performance after the formal production;
c) type test is required by national quality supervision organization;
MT/T 689.2-1997 The following standards are cited：
