充填开采工作面“两带”高度计算及其验证

“Two-zone”height calculation in solid backfill mining

为研究充填开采“两带”高度计算方法,对充填开采的覆岩破坏机理进行了分析,研究提出基于关键层理论的充填开采“两带”高度判定方法。通过数值模拟揭示了充填开采工作面上覆岩层移动和破坏规律,结合常村煤矿CT101充填工作面的采矿地质条件,采用充填开采“两带”高度判定方法、经验公式、数值模拟、钻孔探测对其“两带”高度进行计算分析。研究结果表明:新方法计算结果与实测结果基本一致;采用基于等价采高的传统经验公式计算充填开采“两带”高度误差大;新方法的计算结果和实测结果最为接近,为充填工作面“两带”高度计算提供了方法。

The breakage mechanism of roof strata under the different condition of mining with filling was analyzed,which studied the computing method of“two-zone”height in the mining with filling,It was investigated and proposed the decision procedure of“two-zone”height in the mining with filling who based the key stratum theory;the movement and destruction rule of overlying strata in work surface mining with filling was revealed by the numerical simulation;it used decision procedure of“two-zone”height in the mining with filling,empirical formula,numerical simulation,drilling detection to analyze the“two zones”height,which considered the geological and mining conditions of Changcun colliery.The results showed that the calculated results were in agreement with the experimental results;the height error of“two zones”in filling mining was large according which calculated by the traditional empirical formula.The calculated results of the new method were closest to the measured results,it provided a method for calculation of“two-zone”height in the filling surface.