摘要
为了解决钻孔双端封堵测漏装置在探测煤层顶板导水裂隙带所存在的问题,发明了可通过钻具上下移动实现胶囊、测试段与注水系统之间连接与切换的转换阀,并采用此转换阀对注水装置进行了改进。改进后的装置简化了孔口仪表和供水系统,消除了由于单独供胶囊起胀用的注水或注气管路缠绕、堵塞引发孔内事故的隐患,同时此装置在孔深较大、孔内水量与水压较大时依然适用。研究结果表明:通过在高家堡矿井首采工作面试验,利用TD1、TD2、TD3钻孔实测煤层顶板导水裂隙带最大发育高度分别为86.56、84.37和88.03 m;改进后的装置结构简单、可靠性高、适用性广,可应用于井下仰孔探查煤层顶板导水裂隙带高度。
In order to solve the problems of using the equipment of water injection leakage in the upward slant hole to determining the height of water flowing fractured zone,the change-over device had been invented. It could connect and switch between the water-injection system and the capsules or the test section by moving the drill pipe up or down. The equipment was improved with the change-over device. It had simplified the orifice meter and the water supply system,and eliminated the hidden trouble of plugging due to the water or gas injection pipe line using for swelling the capsule with a large amount of water and some water pressure in the deep hole. The results showed that the improved equipment was used in the first mining face of Gaojiabu Coal Mine,and the heights of water flowing fractured zone of TD1,TD2,and TD3 drillings were 86. 56 、84. 37 and 88. 03 m respectively. The improved equipment had a simple structure,high reliability,and wide applicability,and could be used to determining the height of water flowing fractured zone in the upward slant hole.
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