【作者】 孙晓光；

【导师】 周华强；

【作者基本信息】 中国矿业大学 ， 采矿工程， 2008， 硕士

【摘要】 我国是受水害最严重的国家,承压水突水是我国很多煤矿在安全生产中急待解决的问题,义马煤业集团公司新安煤矿就面临着奥灰岩强承压水上采煤安全的问题。本文分析了新安煤矿水文地质环境,为采取有针对性的防治措施做好准备。得出新安煤矿防治水的重点是底板奥灰承压水,小浪底水库蓄水后,矿井突水危险和突水强度都将增加。分析了底板突水的类型和影响因素,运用弹塑性理论研究了煤层底板岩体的破坏深度及底板突水极限压力,设计了底板采动破坏深度测试方案,为预测及防治煤层底板突水提供了理论依据。采用FLAC数值模拟软件对工作面有无承压水条件下底板的破坏深度、范围、性质和过程进行流固耦合分析,经过比较分析,得出相关规律。结合新安煤矿实际条件,运用突水系数法、理论计算法、“下三带”法分别进行突水危险性预测,通过建立BP神经网络模型进行底板突水量预测。在此基础上提出了以加强地质探测、优化工作面布置及底板注浆加固为主要方法的防治水措施。完成了为下一步防治水工作做准备的注浆站系统的设计、注浆材料的选择以及试验工作面底板注浆加固与改造方案的设计。更多还原

【Abstract】 China has the most serious water disaster, the confined water irruption is the problem which most mines of China are facing in the safety production. The Xin’an Mine, Yima Mine Group, is facing the problem of mining upon the Ordovician high confined water.This paper analyzed the Hydro-geological environment of Xin’an Mine to be prepared for the next prevention measures. The conclusion is that the important point of the prevention is Ordovician limestone confined water, also the danger and strength of water inrush will increase after reservoir of Xiaolangdi impounds.The type and influencing factor of water inrush were analyzed, and the disruption depth in floor rock mass and ultimate pressure of water inrush were studied using elastic-plastic theory. Also the test of disruption depth in floor rock mass was designed. The theory base was supplied for the forecast and prevention of water inrush from coal floor.Fluid-mechanics coupling analysis was made to the disruption depth, range, property and process of floor in the case of confined water or not using numeric simulation software, FLAC. Some conclusions were drawn by comparing and analyzing.Combined with factual condition of Xin’an Mine, forecast of floor water inrush risk was made by method of water inrush coefficient, theory computation and“three under-seam belts”. Forecast of floor water inrush quantity was made by building BP artificial neural network model. Based on these analyses, this paper suggested the prevention methods of confined water by strengthening geology exploration, optimizing workface disposal and reinforce floor with grouting,The design of grouting station system, choosing the grouting material and design the parameters of grouting testing workface was completed.更多还原