千米立井动水注浆特性研究

Research on grouting characteristics for km vertical shaft

壁后注浆是治理煤矿立井突水最行之有效的手段,而注浆的最主要对象就是壁后岩层中的裂隙,为研究岩层裂隙中浆液的扩散规律,根据牛顿摩擦阻力定律及力的平衡定律推导出裂隙动水注浆模型。分析研究了水流对浆液扩散的影响,分别得出了顺水流方向与逆水方向浆液的扩散模型,通过模型得知顺水水流有利于提高注浆效果,逆水水流对浆液扩散半径的影响程度比顺水水流大,得出不同水流方向条件下浆液的扩散半径与注浆压力之间的关系及扩散半径与注浆时间的关系。

Grouting behind the wall is the best means to control the water burst,in coal mine vertical shaft,and the main grouting object is the fracture in wall rock.In order to study the slurry diffusion rule,according to Newton's law of friction resistance and the force's balance rule,the paper derived the model of fracture's grouting in dynamic water.Through analyzing the influence of flow on slurry diffusion,respectively concluded the slurry diffusion model in the flow and contrary directions.From the model we can know that the flow direction is helpful to improve the grouting effect,The influence degree of contrary water flow on the radius of slurry diffusion is bigger than that of the flow direction.Obtained the relationship between the slurry diffusion radius and grouting pressure and the slurry diffusion radius with grouting time under the condition of different direction of flow.