In order to solve the calculated problem of the gas lost quantity during the sampling of the intensive failed coal,a test set device with de-air,air filling,constant temperature and desorption measurement was established.

After studied the Liuqiao fault fracture zone water yield property and transmissibility,pipe shed support and advance grouting reinforced engineering were adopted before the crossheading cut through the fault,meanwhile a series of tried and true driving and supporting measures taken on to insure the-380 crossheading cutting through the fault safely.

An outline is given of technical investigation of the transformed belt-subinclined shaft passing through the soft rock bed in the high stress fracture zone of Wu-er coal mountain at Level 2 of No 6 mine in Pingdingshan Coal Group Co,Ltd.

It is considered that the silicated fracture zone of carbonate rocks of the underlying Ordovician System is the mineralizing materials source of the gold deposit and the gold enrichment is relative to the extremely strong chemical weathering in tropical rainforest .

The effects of longshore currents,Stokes mass transport by waves,large scale eddies and the instability of longshore currents on the transport of pollutant in a surf zone are discussed based on the experimental results.