1.1 This specification covers limestone suitable for use as dust in coal mines to reduce risk of coal dust explosions.
Note 1–Limestone can serve as a source of incombustible material in coal mine operations. Limestone is dusted onto coal exposures in sufficient amount so that not less than 65 % of all loose dust shall be limestone incombustible material. In return air courses the concentration of incombustible materials should be not less than 80 % of the total dust (MSHA 30 CFR 75.403). With such a concentration of limestone incombustible material, dust explosions cannot initiate or be propagated from nearby gas explosions. The limestone must be substantially dry in order to dust satisfactorily.
Product Details
- Published:
- 12/01/2013
- Number of Pages:
- 2
- File Size:
- 1 file , 57 KB
- Redline File Size:
- 2 files , 110 KB
