极破碎富水泥岩巷道自溶解注浆加固方法及作用机理研究

Mudstone is a common surrounding rock of deep roadways in coal mines, in deep high stress and under the action of water is easy to form extremely fractured water rich area, often become the key area restricts the whole roadway safety driving. Grouting reinforcement method is common, the traditional method needs water as a transport medium of the slurry water, but the intervention will soften intensified mudstone, grouting is difficult to achieve the desired effect. The project creatively put forward since the dissolution of grouting reinforcement method of anhydrous effect, and to carry out research on its mechanism. The project intends to develop a set of self dissolution grouting equipment, and through the indoor model test, to verify and optimize reinforcement method of grouting, the establishment of self dissolution of grouting reinforcement method is perfect; the established grouting reinforcement method, using the large-scale indoor model test,study on migration mechanism of self dissolution of grouting under the mode of slurry, the establishment of selfdissolution under the mode of grout diffusion model; finally, through the indoor three axis and SEM test, to study the mechanism of self dissolution mode grouting concretion body, reveals the method of groutingreinforcement mechanism, establish the corresponding mechanics model. The research results will provide a new idea and method of the grouting for deep rich cement rock roadway of coal mine in our country and other similar roadways, provide technical guarantee and efficient mining of coal mine safety in our country.

泥岩是煤矿深部巷道中常见的围岩类型,在深部高应力和水的作用下易形成极破碎富水围岩区,往往会成为制约整个巷道安全掘进的关键区域。注浆加固是常见的加固方法，传统的方法需要水作为浆液的运输介质，但水的介入会加剧泥岩的软化，注浆加固很难达到预期效果。本项目创造性地提出了一种自溶解注浆加固方法，并对其作用机理开展相关研究工作。项目拟通过室内试验，对注浆加固方法进行验证和优化，建立完善的自溶解注浆加固方法；运用建立的注浆加固方法，借助大型室内模型试验，对自溶解注浆模式下浆液的运移机制开展研究，建立自溶解模式下的浆液扩散模型；最后，通过室内三轴压缩和扫描电镜试验，对自溶解模式下注浆固结体的作用机理进行研究，揭示该方法下的注浆加固作用机理，建立相应的力学模型。研究成果将为我国煤矿深部富水泥岩巷道及其他同类巷道提供一种新的注浆理念和方法，为我国煤矿安全高效开采提供技术保障。

泥岩是世界上广泛分布的岩体，在我国大型交通隧道建设和煤矿深部巷道掘进中常见的围岩类型,在深部高应力和水的作用下易形成极破碎富水围岩区,造成巷道围岩大变形破坏，往往会成为制约整个工程安全掘进的关键区域。注浆加固是常见的加固方法，传统的方法需要水作为浆液的运输介质，但水的介入会加剧泥岩的软化，注浆加固很难达到预期效果。本项目创造性地提出了一种自溶解注浆加固方法，以此为依托，研发了一套自溶解注浆加固设备，并提出了完善的自溶解注浆加固方法，可为同类型工程注浆提供新的思路；建立了基于岩石矿物成分的物理模拟相似材料优化选取方法，提高了大型物理模拟试验相似材料配置的效率；开展了结构面注浆加固机理和含内缺陷注浆固结体破坏机理研究，揭示了相关破坏规律和机理，为注浆工程作用机理研究提供了新的思路。依托该项目研究成果，通过后期不断完善和发展，有望为我国煤矿和西部交通工程建设中深部富水泥岩巷道及其他同类巷道提供一种新的注浆理念和方法，保障工程建设安全。