恒源煤矿6煤层底板含水层注浆改造参数优化研究

发布时间：2019-03-13 21:14

【摘要】：矿井突水严重影响煤矿生产的安全,我国超过半数的煤矿不同程度地受到底板岩溶承压水的威胁,受水害面积和严重程度居世界主要产煤国首位。展开对煤层底板注浆改造参数的研究对更加有效的防治煤层底板突水和控制注浆成本有重要的意义。 本文经过收集恒源煤矿、刘桥一矿、五沟煤矿的资料,确定了三矿煤层底板岩层岩体结构特征及各个矿工作面主要出水水源、出水量,为注浆配比提供理论依据。 本文以研究安徽恒源煤矿Ⅱ6112工作面底板注浆参数优化为基础,结合刘桥一矿、五沟煤矿煤层底板特征,对浆液的配比展开实验研究。针对三个矿区煤层底板岩溶发育的特征、现场注浆情况以及控制注浆成本等问题,综合浆液的比重、粘度、析水率、结石率、抗压强度、凝结时间等技术指标确定最优配比的水泥-粘土浆液,另做相同配比的水泥-膨胀土浆液作为对照,分析两种浆液的优缺点。 建立数值模型,分析不同配比的浆液在不同压力和孔隙率条件下,扩散形态和扩散范围,为现场注浆提供理论依据。 从恒源煤矿、五沟煤矿各选取一个注浆完成的工作面,对比注浆前后煤层底板富水区分布,分析底板岩溶发育情况及评价注浆效果。
[Abstract]:Mine water inrush seriously affects the safety of coal mine production. More than half of coal mines in China are threatened by floor karst confined water in varying degrees. The area and severity of water damage rank first in the main coal-producing countries in the world. The research on the parameters of coal seam floor grouting is of great significance for more effective prevention and control of water inrush and grouting cost of coal seam floor. Through collecting the data of Hengyuan Coal Mine, Liuqiao No. 1 Coal Mine and Wugou Coal Mine, this paper determines the rock mass structure characteristics of coal seam floor and the main water source and water output of each miner's surface, which provides a theoretical basis for grouting proportioning. Based on the study of the optimization of grouting parameters in face 鈪，

本文编号：2439716