采空区高掺量粉煤灰水泥注浆流场分布规律研究
发布时间：2018-09-01 16:01
【摘要】：以实验室相似模拟试验和理论分析为主要研究手段,对采空区的二次失稳致因与注浆流场分布规律进行了系统的分析与研究。研究结果表明:采用确定的配比制得的注浆浆液基本符合宾汉姆流体标准;垮落带破裂岩体的"二次失稳"特征是在外部荷载作用下的压密和位移;断裂带岩体的"二次失稳"特征主要是岩块结构失稳和离层空间的闭合;弯曲带岩体的"二次失稳"特征表现为在上覆压应力和外部荷载作用下的离层裂缝压密;垮落带和断裂带是导致覆岩二次移动、采空区结构二次失稳的主要根源;采空区垮落区范围内的注浆渗流迹线分布呈现"脊椎式";堆积区范围内的注浆渗流迹线分布呈现"絮网式";根据对浆液流动迹线的分析,提出了2种注浆引起的固相颗粒扩散的理论模型。
[Abstract]:Based on the laboratory simulation test and theoretical analysis, the causes of secondary instability and the distribution law of grouting flow field in goaf are analyzed and studied systematically. It is characterized by compaction and displacement under external load; secondary instability of rock mass in fracture zone is mainly characterized by structural instability of rock mass and closure of separation space; secondary instability of rock mass in bending zone is characterized by separation crack compaction under overlying compressive stress and external load; collapse zone and fracture zone are caused by secondary movement of overlying rock mass. The main causes of the secondary instability of the goaf structure are as follows: the grouting seepage trace distribution in the goaf caving area presents "spine type"; the grouting seepage trace distribution in the accumulation area presents "flocculation network type"; according to the analysis of the grouting flow trace, two theoretical models of solid particle diffusion caused by grouting are put forward.
【作者单位】： 天地科技股份有限公司开采设计事业部;煤炭科学研究总院开采研究分院;
【基金】：国家科技重大专项:大型油气田及煤层开发课题(2016ZX05045-007)
【分类号】：TD265.4;TD325.3
本文编号：2217676
[Abstract]:Based on the laboratory simulation test and theoretical analysis, the causes of secondary instability and the distribution law of grouting flow field in goaf are analyzed and studied systematically. It is characterized by compaction and displacement under external load; secondary instability of rock mass in fracture zone is mainly characterized by structural instability of rock mass and closure of separation space; secondary instability of rock mass in bending zone is characterized by separation crack compaction under overlying compressive stress and external load; collapse zone and fracture zone are caused by secondary movement of overlying rock mass. The main causes of the secondary instability of the goaf structure are as follows: the grouting seepage trace distribution in the goaf caving area presents "spine type"; the grouting seepage trace distribution in the accumulation area presents "flocculation network type"; according to the analysis of the grouting flow trace, two theoretical models of solid particle diffusion caused by grouting are put forward.
【作者单位】： 天地科技股份有限公司开采设计事业部;煤炭科学研究总院开采研究分院;
【基金】：国家科技重大专项:大型油气田及煤层开发课题(2016ZX05045-007)
【分类号】：TD265.4;TD325.3
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