Underground Coal Mine Roof Support

The initial movement starts as soon as the coal which previously supported and constrained the roof strata is removed and no support is in place to resist such movement other than the bridging effect of strata supported by uncut coal ahead of the face and the supports set between the face and the goaf.

Underground coal mine roof support.

The rapid strength gain provides immediate ground support to the surrounding strata with quicker cure times to meet seal approval specifications in days rather than weeks. The coal mine roof rating cmrr ranges from 30 83 and averages 44. Underground support solutions pty ltd. The company has been developing and manufacturing products for deep level mining clients for the last two decades and is co owned by heavy engineering company dcd and steel tube and pipe giant robor.

Today this prop is one of eleven different standing support systems strata offers. Originally introduced in 1993 the strata propsetter support system remains one of strata s top selling support props through out the world. Strata worldwide was founded on its line of engineered secondary roof supports for underground coal mining. Chocks also known as powered supports supports or shields roof support in early longwalls in the days of handmining was by timber props and bars withdrawn from the goaf side as the facesadvanced and re used if still intact.

During this time secondary support service was also started and in nearby future primary support will also be a service offered. J seal is a specialized foaming cement that is used to build permanent coal mine ventilation seals. Roof supports can only be understood in conjunction with the rock structure that they support. Msp specialises in supplying deep level gold platinum and coal mines from its facility in duncanville south africa.

Including timber steel and concrete options. The depth of cover ranges from 25 900 ft and averages 325 ft. Originally introduced in 1993 the strata propsetter support system remains one of strata s top selling support props through out the world. Mine support products msp is a manufacturer of underground support systems for the mining industry.

Coal mine roof that falls before the installation of roof bolts can be hazardous. From 1995 2008 24 miners were killed while travelling beneath unsupported roof msha 1995 2008. Coal mine roof support strata worldwide. Chocks introduction underground coal.

The strength of the rock depends on geology and the loads are applied primarily by the in situ and. Including timber steel and concrete options.