Passive protection system 
 With bolt, steel columns, support rope, anchor rope and the wire rope in a fixed way of the formation of the slope intercept form of stone fence network, in order to achieve a slope to intercept flexible rockfall protection systems. Its function is to intercept and stockpiling slope rockfall 
 The composition of the passive protection system 
 The general specifications of passive protection system and its components, functions in Table 2. A variety of passive protection systems can also be carried out according to design requirements posed by the different adjustments. 
 Passive protection system 
 Basic component features of protective type of energy, kJ 
 PD-025 steel columns, with a vacuum ring rope and double support φ12 φ16 "1" shape on the anchor rope (3 per cross-decompression ring), φ12 side of the anchor rope (single rope), DO/08/250 type of steel wire rope, φ8 suture wire 250 
 PD-050 steel columns, with a vacuum ring rope and double support φ16 φ14 "human" shape on the anchor rope (per cross-six vacuum ring), φ16 side of the anchor rope (single rope), DO/08/200 type of steel wire rope, φ8 suture wire 500 
 PD-075 steel columns, with a vacuum ring rope and double support φ18 φ16 "human" shape on the anchor rope (10 per cross-decompression ring), φ18 side of the anchor rope (single rope), DO/08/150 type of steel wire rope, φ8 suture wire 750 
 Slope Protection System Application 
 Steel wire rope as the main component features flexible protection system can be used for slope landslides, collapse, rockfall, slump slip, weathering, House of recollected fragments and debris flow or a shallow slope to the slope of the slope is characterized by destruction of geological disasters and avalanches, slope erosion, by blasting, falling objects and other hazards Protection. 
 Application of these uses have in foreign countries, such as Japan's Mount Fuji Travel slope Slope extensive use of slope protection system to control the remnants of the surface of loose volcanic material piled the collapse, movement and protection of the safety of visitors. However, the slope in the country so far mainly used for flexible protection system also rockfall boulders and landslides prevention of geological disasters, such as China Kunming Railway Yanjin I Slope rockfall protection works.