连续采煤机短壁机械化开采煤柱合理宽度研究

Study on Rational Coal Pillar Width for Mechanized Shortwall Mining with Continuous Miner

为提高东圪堵煤矿1601连续采煤机短壁工作面采出率,确定合理的顶板控制技术措施,针对该矿连采工作面开采条件,采用FLAC3D数值模拟和现场观测手段,分析了1601连采工作面刀间煤柱、区间隔离煤柱不同宽度条件下顶板垮落情况。数值模拟与现场观测结果一致表明:在刀间煤柱宽1.0～1.5 m,隔离煤柱宽12 m条件下,既能最大限度地提高连采工作面采出率,又能保证顶板有规律的垮落。煤柱宽度进行合理优化后,1601连采工作面的采出率达到了68.7%,顶板垮落步距为5个联络巷宽。

In order to improve the coal mining rate of No.1601 shortwall mining face with the continuous miner in Donggedu Mine,the rational roof control technical measures were determined.According to the mining conditions of the coal mining face with the continuous mine in Donggedu Mine,the FLAC3D numerical simulation and the site observation means were applied to analyze the roof falling conditions under different width condition of the cut pillar and the space insulated pillars of No.1601 coal mining face with the continuous miner.The results of the numerical simulation and the site observation all showed that under the cut pillar with the width of 1.0~1.5 m and the insulated pillar with the width of 12 m,the mining rate of the coal mining face with the continuous miner would be maximum improved and the regularly roof falling could be ensured.After the rational optimization of the pillar width,the coal mining rate of No.1601 coal mining face with the continuous miner could reach at 68.7% and the roof falling step distance could be controlled at the width of five connection gateways.