新型聚氨酯堵水注浆材料的研究及应用

Development and application of new waterproof grouting materials of polyurethane

为了对富含水、淋水状态下破碎煤岩体进行有效的化学加固,研制出新型聚氨酯堵水材料,在破碎煤岩体大范围淋水条件下,可以正常反应,凝胶时间1～10 min(可调),一次封堵裂隙水量达到95%以上;对含水破碎煤岩体具有良好的加固性能,对煤岩含水裂隙面黏结强度超过1 MPa、结石体抗压强度大于8 MPa。该材料填补了矿井大范围淋水条件下破碎煤岩体堵水与加固一次完成的技术空白,并通过在现场的应用过程中得到了验证。

In order to achieve effective chemical reinforcement for broken coal and rock mass with rich water,new waterproof grouting materials of polyurethane are developed.Under large-area leakage of broken coal and rock mass,normal chemical reaction can proceed.The cementing time is 1～10 min（adjustable）,and the water amout above 95% is proved for time ponding.The new materials are of good reforcing performance.The cohesive strength exceeds 1 MPa for the crack face of coal and the compressive strength exceeds 8 MPa for the rockmass.It fills the gap of waterproof and reinforcement of the broken coal and rock mass in mines with large-area leakage.The engineering application has proved the validation of the new materials.