淋水碎裂顶板煤巷锚固试验研究与实践  

Anchorage experimental research on a coal roadway with water spraying and broken roof and its application

作　　者：何富连[1] 严红[1] 杨绿刚[1] 杨洪增[1] 李琦[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《岩土力学》2011年第9期2591-2595,共5页Rock and Soil Mechanics

基　　金：国家重点基础研究发展计划项目资助(No.2010CB226802);中央高校基本科研业务费专项资金资助(No.2010YZ02)

摘　　要：煤巷顶板锚固区域富水岩层支护中出现的沿锚杆(索)钻孔持续渗、淋、涌水难题是工程中亟待解决的问题。采用一种新型锚杆(索)防水锚固剂进行了相关防水性配比试验研究;为了获得煤系碎裂顶板持续渗水作用下粉砂岩强度变化规律,在现场与实验室分别进行渗水试验。结果表明:NS-1不饱和聚酯树脂及添加2%的XS-1高分子速溶胶粉是防水型锚固剂关键点;在静水浸泡作用下,粉砂岩抗压强度呈现先缓慢增大而后快速衰减的变化规律;在动水渗流、循环风干作用下粉砂岩在36～42 h内裂隙开度增加,强度持续弱化。研究了粉砂岩顶板水与支护体耦合作用关系,在团柏煤矿101101巷道进行新型锚固剂锚杆(索)锚固试验,防水型锚固剂在钻孔渗流量为140 mL/s时,仍能达到208 kN的锚固效果;试验结果表明,对锚杆、锚索施加高预应力和采用防水锚固剂可保证顶板淋水碎裂煤巷的稳定。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.

关 键 词：富水岩层 渗水试验 裂隙 防水锚固剂 

分 类 号：TD26[矿业工程—矿井建设]