The paper introduced the successful application of high bench caving method of using deep hole roller rock bit into the practice of solving the complex goaf area, a stuff problem of this kind.

采用深孔牙轮钻机、利用高台阶崩落法成功地处理了复合采空区，解决了复合采空区处理难的问题，使技术人员在熟练浅采、深采空区处理的情况下，又探索出复合采空区的处理方法。

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