厚松散沙层下富水顶板采煤突水溃沙危险性分区

Risk Zoning of Water Inrush and Sand Bursting Under Water Abundance Roof and Thick Loose Sand Layer

为有效解决厚松散沙层下富水顶板采煤突水溃沙难题,以神东矿区某矿为例,通过理论和实测2种手段,对垮落带和断裂带(简称"两带")高度传统经验公式进行修正,得出适合本区的"两带"高度计算公式。从防治水沙溃涌角度,引入导水沙裂缝带概念,得出适合本区的导水沙裂缝带高度计算公式。根据总结出的突水溃沙危险性分区判据,在对研究区基岩展布规律、主要含水层富水性分区和冒裂安全性分区复合叠加的基础上,形成突水溃沙危险性分区预测方法。

In order to effectively solve the problem of water inrush and sand bursting under water abundance roof and thick loose sand layer, taking a coal mine in Shendong Mining Area as an example, the traditional empirical formula of height of caving zone and fissure zone（hereinafter referred to as ＂two zones＂） was modified by theoretical and practical methods to obtain the＂two zones＂height which is suitable for this area. From the point of preventing water inrush and sand bursting, the concept of water and sand fracture zone was introduced, and the formula for calculating the height of water and sand fracture zone was obtained.According to the summarized zoning criteria for the risk of water inrush and sand collapse, the zoning prediction method for the risk of water inrush and sand collapse is finally formed on the basis of the compound superposition of the distribution law of bedrock, the water-rich zoning of main aquifers and the safety zoning of risk cracking.