The cross well electromagnetic tomography have been used to monitor the changes of absorption coefficient of electromagnetic wave before and after earthquake for five years at Dahuichang fault since 1992.

Discussion on gold-containing property of"Da-Chang Stratum" of South-West Guizhou;

By analyzing the case of using cable anchor and reinforcing bar pillars joint supporting technique to pass large fault in 6138 tunnel,the paper has introduced four sides such as the existing problems of cable anchor supporting,the decision of anchor supporting parameter,the construction demands of cable anchor and reinforcing bar pillars joint supporting and its applied effects.

Adopting dependable technique measures at-256 north enlarged area of 18-2 layer face which are advanced in technology reasonable in economy realieblein safety realize continuous mining at layer of large fault,obtain the good and economic and social profits,provide the important practical thevretical basis for deep inclined π face.

This paper introduces the large fault on 68214 face of Du’erping Coal Mine, and puts forward some technical measures for passing through the large fault and the technical measures for injecting the polymer materials (Malisan N).

Practice on triangle-orebody mining under big fault;

Three downhill tunnel get across F8 fracture zone in 3~(rd)district of Liangbaosi mine,they have a variety of adverse environment such as big ground stress, many big fault structural fractures and the corrosion of three ash water.

With a complicated cracking system, Daxing fault in Langgu sag controls the mid-west edge and influences the whole hydrocarbon distribution in the sag through the structure pattern and sedimentary characteristics.