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针对传统保护层开采保护范围确定方法的局限性,结合某矿井保护层开采的实际情况,提出了一种新的保护层开采保护范围的确定方法(包括沿工作面布置方向和工作面推进方向的保护范围),即现场流量观测分析和含量对比法.通过流量观测分析和含量对比,结合工程实际情况进行计算机数值模拟来确定上保护层开采的“两向”保护范围;在含量测试取样过程中,采取了“大孔口钻杆扩孔,小孔口钻杆接岩芯管”的定点取样方法.研究结果表明:确定的保护范围符合现场实际情况;定点取样方法基本上保证了含量测值的准确性.
Aiming at the limitations of the method of determining the scope of protection for the conventional protective layer mining, a new method of determining the protective scope of the protective layer mining is proposed based on the actual situation of protective layer mining in a mine (including the direction along the face and the advancing direction of the working face The scope of protection), that is, on-site observation and analysis of flow and content comparison method. Through the observation and analysis of flow and content comparison, combined with the actual situation of the computer numerical simulation to determine the upper protective layer mining In the process, the fixed-point sampling method of “large-hole drill hole reaming and small hole drill-pipe core pipe” was adopted.The research results show that: the definite protection scope conforms to the actual situation in the field; the fixed-point sampling method basically guarantees The accuracy of the content measurement.