新型煤岩体加固注浆料制备及应用分析

Preparation and Application Analysis on A New Grouting Material for Coal and Rock Mass Reinforcement

煤层回采过程中受采动影响,巷道煤岩体必然发生破坏,严重威胁工人安全。而注浆加固是解决破碎煤岩体的有效手段,注浆材料用量动辄数万吨。在充分了解破碎煤岩体注浆技术的基础上,研发了一种适用于破碎煤岩注浆加固的新型无机注浆材料,并对该材料进行了性能分析及应用研究。研究结果表明:(1)制备的新型无机注浆材料其力学性能与微观结构良好,组分最优配比为:硫铝酸盐水泥熟料50%,石膏43.75%,生石灰6.25%;(2)强度和凝结时间随水灰比变化空间大,满足对于不同凝结时间需要的工程;(3)试件干缩率和泌水率最高值均小于5%,材料具有很好的稳定性;(4)新型注浆材料注浆后,巷道变形量大幅度降低,不影响巷道的正常使用。

Under the influence of mining movement,coal and rock mass of roadway is destroyed and the safety of workers is seriously threatened.Grouting reinforcement is an effective method to solve broken coal and rock mass,and the amount of grouting material is often tens of thousands of tons.On the basis of fully understanding the grouting technology of broken coal and rock mass,a new type of inorganic grouting material suitable for grouting reinforcement of broken coal and rock was developed,and the performance and application of the material were analyzed and studied.The results showed that:(1)the mechanical properties and microstructure of the new type of inorganic grouting materials are good,and the optimum composition is as follows:sulphoaluminate cement clinker 50%,gypsum 43.7575%,quicklime 6.25%;(2)the strength and setting time vary greatly with the water-cement ratio;(3)the highest values of dry shrinkage and bleeding rate are less than 5%,and the material has good stability;(4)after grouting with new grouting material,the deformation of roadway is greatly reduced,and the normal use of roadway is not affected.