解决问题和节省费用是每个煤矿经营者优先考虑的问题。两者完美结合的例子就是美国阿巴拉契亚的一个煤矿利用泵灌永久密封墙解决了令人头痛的封闭老塘问题,并因此使该矿的吨煤成本降低70美分。阿巴拉契亚的这个煤矿原先用一条运输胶带与邻矿相通联合生产,为保持胶带线路的畅通,该矿不得不维护旧的采空区,旧的采矿规程也曾规定:“凡是通风的巷道就应一直 Solving problems and saving money is a priority for every coal mine operator. An example of a perfect combination is that a coal mine in Appalachia, United States, uses a permanent irrigation wall with pump-in to solve the troublesome problem of a closed old pond and therefore reduces the cost of the ton of coal by 70 cents. The Appalachian coal mine was originally produced in conjunction with a neighboring mine using a shipping tape that had to maintain the old goaf in order to keep the tape running unobstructed. The old mining code also stipulated: "All ventilated The roadway should always be