机械化开采条件下导水裂隙带发育高度研究

Research on Height of Water Flowing Fractured Zone Under Mechanized Mining

导水裂缝带高度是保证水体下采煤安全的重要参数,为了能够科学的预测机械化开采条件下导水裂隙带发育高度,对影响导水裂隙带发育高度的因素进行分析,并在之前专家学者大量观测数据基础上进行归纳总结,采用线性拟合的方法给出机械化开采条件下导水裂隙带发育高度的预计公式。预计公式与《建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程》中给出的相应的预计公式进行比较,发现通过规程中给出的公式进行预测导水裂隙带高度值小于实测值,对这一问题进行具体分析,给出造成规程中预计值偏小的具体原因。同时,所得出的预计公式是通过全国大量开采实测数据得出,源于实际故更适用于对机械化开采条件下导水裂隙带发育高度的预计。

The height of water flowing fractured zone is an important parameter to ensure the safety of coal mining under water body, in order to scientifically predict the height of water flowing fractured zone development under mechanized mining, the paper analyzes the factor affecting the height of water flowing fractured zone growth, and summarizes the data based on a large number of observations, and uses linear fitting method to give the estimated formula on the height of water flowing fractured zone development under mechanized mining. The estimated formula was compared with that given in ＂Regulations of coal pillar design under buildings, water, railway and main roadway coal and covered coal mining＂. The results of formula in the Regulations are smaller than the measured values, the specific reasons for the error are analyzed. And as the proposed formula is concluded from mass measured data in the country, it is more suitable for the prediction practice of the height of water flowing fractured zone development under mechanized mining.