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分布式光纤测温具有测温连续、分布式测量等优点,在巷道围岩钻孔中敷设测温光纤可准确测地量出围岩调热圈温度场,并通过有限差分法进行数值模拟。在龙固矿辅二大巷和三采煤仓通道的联络巷围岩布置3个钻孔来测量围岩温度。测试结果表明,巷道围岩调热圈温度场为相似的同心圆,距离巷道壁面越远则围岩温度越高,相同温差之间的等温线之间距离越大,围岩调热圈半径最大为33 m,测试结果与计算结果基本相符。
Distributed optical fiber temperature measurement with continuous temperature, distributed measurement, etc., in the tunnel around the hole in the laying of temperature measurement fiber can accurately measure the temperature field of surrounding rock heat transfer coil, and the finite difference method for numerical simulation. In Longgu mine auxiliary two lane and three coal warehouse channel contact lane surrounding rock arranged three holes to measure the surrounding rock temperature. The test results show that the temperature field of tunnel heat transfer ring is similar to the concentric circle. The farther away from the wall of tunnel, the higher the surrounding rock temperature and the greater the distance between isotherms of the same temperature difference, Is 33 m, the test result basically agrees with the calculation result.