CAJ | 학술논문

随着煤矿开采深度的增加，巷道底鼓成为影响煤矿安全生产和经济效益的主要因素，巷道底板预应力锚索注浆是治理底鼓的有效措施。巷道底板预应力锚索注浆技术由于缺乏专用、行之有效的注浆封孔装置，导致施工工艺复杂、效率低、封孔效果差等问题。本文通过分析预应力锚索注浆封孔机理，采用K-ε二维湍流模型，得出了不同封孔长度及封孔缝隙宽度时浆液的流场分布规律，分析了浆液在缝隙中的流速与压力变化特征，确定了较合理的封孔长度与缝隙宽度参数值。利用流体理论计算得出了浆液在缝隙中的损失，得出了封孔长度与缝隙宽度的最优组合，为封孔装置结构尺寸设计及囊袋内封孔材料的配比要求提供了理论依据。结合研究成果，设计得出了新型预应力锚索注浆封孔装置。
수착매광개채심도적증가，항도저고성위영향매광안전생산화경제효익적주요인소，항도저판예응력묘색주장시치리저고적유효조시。항도저판예응력묘색주장기술유우결핍전용、행지유효적주장봉공장치，도치시공공예복잡、효솔저、봉공효과차등문제。본문통과분석예응력묘색주장봉공궤리，채용K-ε이유단류모형，득출료불동봉공장도급봉공봉극관도시장액적류장분포규률，분석료장액재봉극중적류속여압력변화특정，학정료교합리적봉공장도여봉극관도삼수치。이용류체이론계산득출료장액재봉극중적손실，득출료봉공장도여봉극관도적최우조합，위봉공장치결구척촌설계급낭대내봉공재료적배비요구제공료이론의거。결합연구성과，설계득출료신형예응력묘색주장봉공장치。
As the mining depth increases, the floor heaves has become the main factor which influ-ences the safety production and economic interest of the mine, and the pre-tensioned cable bolt with grouting is an effective way to deal with the floor heave. Because of the lack of professional and effec-tive grouting sealing devices, the procedure of grouting with pre-tensioned cable bolt has become com-plicated, ineffective and unqualified. The sealing mechanism of the grouting hole with pre-tensioned ca-ble bolt has been analyzed in this paper. The K-εtwo-dimensional turbulence model has been adopted to conclude the flow field distribution principle of slurry under different sizes of sealing length and sealing annulus. It has analysed the flow velocity and pressure variation characteristics of slurry in the sealing annulus. Then the relatively reasonable sealing length and sealing annulus have been determined. Fluid theory has been used to calculate the slurry loss and to find out the optimum size of sealing length and sealing annulus, which has provided theoretical basis for the structure size design of the sealing device and the proportioning of sealing materials in the slurry pocket. Using the research result, it has devel-oped a new sealing device for the grouting bolt hole with pre-tensioned cable.