为了减少钻井生产对周边环境的污染和破坏，以煤层气钻井废泥饼为研究对象，掺入不同比例的矿渣基固化剂对其进行固化处理，将固化体的强度和浸出液的pH、悬浮物（SS）、色度、化学需氧量（重铬酸盐法，COD_Cr）等指标用于评价其固化效果，并采用X射线衍射仪（XRD）和扫描电子显微镜（SEM）探究其固化机理。结果表明：随着矿渣基固化剂掺量的增加和龄期的延长，固化体抗压强度会随之增加，当矿渣基固化剂掺量为20%时，固化体养护7 d后抗压强度为0.17 MPa，已经满足原地铺路要求；当矿渣基固化剂掺量为10%时，养护7 d后，固化体浸出液的各项指标均能满足GB 8978—1996《污水综合排放标准》中的一级标准，而且矿渣基固化剂的固化效果明显优于水泥；通过微观分析得知，矿渣基固化剂在水化过程中生成的水化硅铝酸钙（C-A-S-H）和水化铝酸钙（C-A-H）等水化产物与泥饼颗粒胶结形成网络状结构，使其结构致密。该研究为钻井废弃泥饼的处理与利用提供一定的参考和理论依据。

In order to reduce the pollution and damage of drilling production to the surrounding environment，the drilling mud cake was took as the research object，different proportions of slag-based solidification agents were added to solidify the drilling mud cake.The strength of the solidified body and the pH，suspended solids（SS），chromaticity，COD_Cr and other indicators of the leachate were used to evaluate its solidification effect.X-ray diffraction（XRD） and scanning electron microscopy（SEM） were used to reveal its curing mechanism.The results showed that the compressive strength of the solidified body was increased with the increase of solidifying agent dosage and the extension of curing time.When the dosage was 20%，the compressive strength of the solidified body after 7 d was 0.17 MPa，which met the requirements of in-situ paving.When the content was 10% after 7 d，all indicators of the solidified leachate could meet the first level standard in GB 8978—1996“Integrate wastewater discharge standard”，and the solidifying effect of the slag-based solidifying agent was significantly better than that of cement.It was found that the slag-based solidification agent generated hydration products such as hydrated calcium silicate aluminate（C-A-S-H） and hydrated calcium aluminate（C-A-H） through microscopical test，which cemented with mud cake particles to form network structure，making the structure denser.The results of this research could provide some useful guidance and theoretical basis for the disposal of drilling waste mud cake.