In this paper, the control of pressure and test operations procedure of extrusion and fracture device have been studied, semi-closed bomb controlling equations of extrusion and fracture device of propellant charge has been es.

Compressive crusher is the main equipment of rock material crushing and it is widely used in metallurgy and mining industry, building industry, road construction, chemical engineering and silicate industry.

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.