倒台阶法治理奥陶系高承压含水层套管错断技术的研究及推广应用

Study and Application of Casing Failure Control Technology in Ordovician High Confined Aquifer by Using Fall Step Method

通过对奥陶系灰岩承压含水层在埋藏深、地应力大、水压大、水量补给丰富的前提下发生在底板注浆改造期间的套管错断治理技术,从巷道施工到底板奥灰水治理在三维空间中结合自身结构、规模、所受地应力及埋深造成的复杂性及不确定性因素,目前国内各大煤业集团公司对于底板注浆加固套管错断、水文观测孔套管错断、漏水、渗水等现象较多,处理难度较大,有的单位套管出现问题在出水量小水压小的情况下,处理几年都处理不好,因此研究奥灰水赋存规律及径流带方向至关重要,避免出现在矿井生产过程中,由于对研究对象认识的局限性不足造成底板水失控突水风险,给单位的财产带来不必要损失,对于研究套管错断技术有着重大意义。

On the premise that the Ordovician limestone confined aquifer has deep burial depth, high in-situ stress, large water pressure and rich water supply, the casing fault treatment technology occurred during the floor grouting reconstruction, from the tunnel construction to the bottom plate Ordovi-cian limestone water treatment, the complexity and uncertainty caused by its own structure, scale, ground stress and burial depth is combined in the 3D, at present, the major domestic coal industry group companies have many problems, such as floor grouting reinforcement casing failure, hy-drological observation hole casing failure, water leakage, water seepage, etc., it is very important to study the occurrence law of Ordovician limestone water and the direction of runoff belt in order to avoid it appearing in the process of mine production, because of the limitation of the research object, the risk of floor water out of control and water inrush brings unnecessary loss to the property of the unit, which is of great significance to the research of casing fault breaking technology.