CAJ | 학술논문

煤壁注浆加固技术是防治煤壁片帮的有效措施，其关键环节在于注浆量的选择。针对注浆量选择这一难题，设计了“一种破碎煤体与注浆再次成型”的实验方案，采用岩石力学试验机对不同浆液比重下煤样试件进行单轴抗压与楔形剪切试验。研究结果表明：浆液的存在延续了煤样的变形，减少了煤样试件的脆性破坏；存在一个合适的浆液比重使得煤样的单轴抗压强度、残余强度达到最大，大于或小于此比重，含浆液煤样强度都未达到最大；浆液的存在增加了煤样的抗剪强度，表现在增加了煤样内聚力，而对摩擦角影响不大。研究结果为现场注浆量的选择提供了理论基础。
매벽주장가고기술시방치매벽편방적유효조시，기관건배절재우주장량적선택。침대주장량선택저일난제，설계료“일충파쇄매체여주장재차성형”적실험방안，채용암석역학시험궤대불동장액비중하매양시건진행단축항압여설형전절시험。연구결과표명：장액적존재연속료매양적변형，감소료매양시건적취성파배；존재일개합괄적장액비중사득매양적단축항압강도、잔여강도체도최대，대우혹소우차비중，함장액매양강도도미체도최대；장액적존재증가료매양적항전강도，표현재증가료매양내취력，이대마찰각영향불대。연구결과위현장주장량적선택제공료이론기출。
The coal wall grouting reinforcement technique is an effective measure to prevent and con-trol rib spalling, and its key procedure is the selection of grouting quantity. To overcome the difficulty in choosing the reasonable grouting quantity, an experimental scheme“The fragmentized and broken coal molded again with mixed slurry”has been designed. The uniaxial compressive and the wedge shear test of coal sample with different proportion of grout has been performed by using the rock mechanics test-ing machine. The study has shown that:the coal shows much less brittle failure because the grout in it can continue the deformation of the coal sample;the uniaxial compressive strength and residual strength of the coal sample can reach the maximum amount with an appropriate proportion of grout;the shear strength of coal sample is increased because of the grout in it, which is shown as the phenomena that the cohesion of coal sample is increased ,while the influence of friction is little. It has been concluded that the research result can provide the theoretical foundation for the selection of grouting quantity.