单水源分级多压式井下导高探测系统的研发与应用

Development and application of single water source grading multi-pressure underground conduction height detection system

传统井下导高探测仪普遍使用两条独立管路进行胶囊封胀和探测段充水工作,实际应用中钻杆与充气管极易缠绕或挤堵,而且现有观测设备只能实现单项压力状态下钻孔漏失量的观测,数据单一且无对比性,为解决上述问题,研究一种单水源分级多压式井下导高探测系统,观测系统包括Ⅰ级高压注推一体化系统、Ⅱ级高压胶囊胀封系统、Ⅲ级低多压递进探测系统,通过减压阀高低压分级转换实现单水源胶囊胀封和探测充水一体化,利用高压转换成不同级别的低压实现低多压递进探测。系统研究可以解决传统仪器探测成功率低的问题,且能丰富不同低压状态下的导水裂缝带探测数据,对于研究多压状态下的采动裂缝导水能力、精确探测导水裂缝带高度有着重要意义。

At present, traditional underground conduction height detectors generally use two independent pipelines for capsule expansion and water filling in the detection section, in practical applications, the drilling pipe and the inflatable tube are easily twisted or squeezed, and the existing observation equipment can only observe the drilling leakage under a single pressure state, providing single and non-comparable data. In order to solve the above problems, a single water source grading multi-pressure underground conduction height detection system, the observation system comprises the Ⅰ-level high-pressure injection-pushing integrated system, the Ⅱ-level high-pressure capsule expansion system, the Ⅲ-level low and multi-pressure progressive detection system, integrating the single water source detection and capsule expansion sealing through high and low pressure grading conversion of the pressure reducing valve, and progressively detecting the multi-pressure using different levels of low pressure converted from the high pressure. The systematic research can solve the problem of low detection success rate of traditional instruments, and can enrich the detection data of water-conducting fracture zones under different low pressure conditions. And it is useful for studying the water-conductivity of mining fractures under multi-pressure conditions and accurately detecting the height of water-conducting fracture zones.