CAJ | 학술논문

从加固破碎岩体和提高支护阻力两方面综合研究入手,分析小康煤矿巷道围岩的力学及变形破坏特征,得出小康煤矿软岩回采巷道围岩失稳机制,指出原有支护系统变形不协调、支护阻力低和没有发挥围岩的承载能力是导致巷道破坏和支护失效的主要原因.以铁法矿业集团小康矿S2N8运输顺槽为工程实例,研究高强度高预紧力锚杆、强力锚索、金属网和喷浆加固以及U型钢在控制围岩变形中的互补作用,详细介绍高强度、高预紧力锚网索配合U型钢可缩支架的互补控制综合支护方案并进行现场工业试验.研究结果表明,互补控制支护技术能够避免极软岩回采巷道的多次翻修,实现支护一次到位.
종가고파쇄암체화제고지호조력량방면종합연구입수,분석소강매광항도위암적역학급변형파배특정,득출소강매광연암회채항도위암실은궤제,지출원유지호계통변형불협조、지호조력저화몰유발휘위암적승재능력시도치항도파배화지호실효적주요원인.이철법광업집단소강광S2N8운수순조위공정실례,연구고강도고예긴력묘간、강력묘색、금속망화분장가고이급U형강재공제위암변형중적호보작용,상세개소고강도、고예긴력묘망색배합U형강가축지가적호보공제종합지호방안병진행현장공업시험.연구결과표명,호보공제지호기술능구피면겁연암회채항도적다차번수,실현지호일차도위.
By using the method of strengthening broken rock and increasing supporting resistance,the mechanical properties,deformation and failure characteristics of surrounding rocks in Xiaokang coal mine are analyzed. Meanwhile,the instability mechanism of soft rock mining roadway is obtained and it is pointed out that the main reasons of supporting failure are inconsistent deformation,low supporting resistance and failure to utilize the supporting capability of the surrounding rocks. Taking the S2N8 haulage roadway of Xiaokang coal mine for example,the complementarity of the high strength bolt,high pretension cable,metal mesh and U-shaped contractible frame in the process of reinforcing surrounding rock is studied. Based on these studies,the complementary supporting technology of high strength and pretension bolt-mesh-cable supporting together with U-shaped contractible frame is introduced. In addition,in-situ industrial test has also been implemented;and the results show that the complementary supporting system can successfully avoid the multi-rebuilding in extremely soft rock mining roadway and the supporting once for all in Xiaokang coal mine can be adopted.