关键词: 富水岩层, 渗水试验, 裂隙, 防水锚固剂

Abstract: Aiming at the problem of continuous water seepage, spraying and gushing along the borehole of bolt (cable) in rock stratum with rich water, a new waterproofing anchorage agent is introduced; and the corresponding waterproof reaction mechanism and its ratio test on this cartridge are researched. To obtain the strengthen change law of siltstone upon the condition of continuous seepage in the broken roof, the seepage experiment is done respectively in the coal field and laboratory, and the results show: Unsaturated polyester resins of NS-1 and polymer instant rubber powder of XS-1 added with a ratio of 2% are the key points for waterproofing anchorage agent. In the 5 days experimental period, the compressive strength of the experimental siltstones suffering from the continuous effect of the static water experience the change process from the former groups increasing gradually to the two later groups decrease quickly. In the circulation effect between flowing water and air dry, the fracture apertures of siltstones continue increasing in 36-42 h, and the whole strength decreases step by step. On the basis of the experimental observation, the coupling relation between the flowing water in siltstone roof and the supporting structure is thoroughly analyzed. Finally, the results for the bolt and cable anchoring force test with new anchorage agent and supporting application on roadway No. 101101 of Tuanbai coal mine show that cable anchoring force could achieve 208 kN with the draining water content keeping 140 mL/s and applying high pre-tightening force and adopting waterproofing cartridge could solve the supporting problem of continuous seepage in the roof, which ensure the safety and stability of the roadway

Key words: rock stratum with rich water, seepage experiment, fracture, waterproof anchorage agent