中文摘要：

石门揭煤时,断层的存在会增大发生灾害的危险性,尤其是高角度断层对煤层和瓦斯赋存特征影响较大。做好石门揭煤过程中高角度断层加固工作可以有效防范灾害的发生。从理论上分析了注浆加固对高角度断层围岩力学性能的影响,视浆液为宾汉流体,基于平板渗流模型,考虑浆液自重,建立了高角度断层内浆射流模型,推导出浆液的扩散半径表达式。将该理论应用于鹤煤八矿-655 m水平轨道石门揭煤点处30F4高角度断层注浆加固。结果表明,通过注浆加固提高了断层围岩的整体性和稳定性,有效预防了断层可能引发的灾害事故,实现了石门安全揭煤。

英文摘要：

This paper intends to analyze the positive effects of grouting reinforcement on the improvement of the mechanical properties of high-angle fault＇s surrounding rocks,for such grouting can help to improve the mechanical strength and the comprehensive stability of the surrounding rocks. As a matter of fact,the currently existing faults are likely to lead to the risk-liability while the coal is being cross-cut and excavated,such as coal and gas outbursts,water inrush or the roof falls. Such disasters tend to come about especially when the high-angle faults affect the coal and gas excavation,which makes it necessary to study how to prevent such disasters at a high angle. And,in this paper,we would like to take the slurry as Bingham fluids and analyze the slurry flow conditions and features in the model on the basis of the flat seepage model. And,then,we have established a slurry jet model at the high-angle faults. Through the high-angle fault slurry jet model,we have successfully derived the formula of the slurry＇s diffusion radius and the grouting pressure.Via the formula,it is possible for us to get the slurry＇s diffusion radius,which can provide us with a theoretical basis for the reasonable layout of the grouting holes. Taking the coal mine No. 8 in Hebi for example,we have successfully applied the aforementioned theory to the enhancement of the 30F4 high-angle fault of the- 655 m horizontal roadway rock cross-cut coal uncovering. From the slurry diffusion radius formula and the actual situation,we have worked out the slurry＇s diffusion radius that should be equal to 3. 2 m. What is more,we have obtained the idealistic scheme for the other arrangements of the grouting holes based on the diffusion radius. In addition,we have taken Malisan as the jet slurry in combination with the other related jet devices for injection. Since the injection has been done,no more disasters come about in the process of the rock crosscut coal excavation. All the above results help us to come to the conclusion that the fracture