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针对深部开采面临的日益增长的超高承压水害威胁现状,对于日常水文地质工作及防治水技术的开张提出了更高的要求,作为日常水文地质工作重点的井下探放水来说,其探放水孔设计是否合理,是否安全,主要还是看孔口管的质量和埋设的深度是否能满足要求。而目前对于孔口管长度的确定方法比较少,多数是直接依据规程中的经验值。通过对探放水孔的受力进行分析,发现其与求安全煤柱时煤柱的受力相似,借此得出求孔口管长度的计算公式,通过调整公式中的相关参数,再结合义安煤矿2个首采工作面的钻孔资料求出对应的孔口管长度,与规程中的经验值进行比较,符合要求。而且通过改变其中的水压值,得到的孔口管长度都要符合《规程》中的经验值。所以研究成果对于规程中缺少理论支持的部分是一种补充。
In view of the increasingly serious threat of ultra-high pressure water hazards to deep mining, higher requirements are put forward for routine hydrogeological work and the opening of water prevention and control technology. As for the underground exploration and drainage water, which is the focus of daily hydrogeological work, Hole design is reasonable, is safe, mainly depends on the quality of the orifice tube and the depth of the buried can meet the requirements. At present, the method for determining the length of the orifice tube is relatively small, most of which are directly based on the empirical values in the procedure. By analyzing the force of the water hole for exploration and drainage, it is found that the stress of the coal pillar is similar to that of the coal pillars for safety pillars. Based on this, the formula for calculating the length of the orifice tube is obtained. By adjusting the relevant parameters in the formula, An coal mine in the first two mining face drilling data to obtain the corresponding orifice length, compared with the experience of the rules to meet the requirements. And by changing the water pressure value in it, the length of the orifice tube obtained should meet the empirical value in the “rules”. Therefore, the research results complement the lack of theoretical support in the protocol.