下峪口煤矿11~#煤层带压开采可行性研究

Feasibility study on pressure mining in 11~# coal seam of Xiayukou Coal Mine

针对下峪口煤矿在开采11~#煤层时受到底板奥灰水突水的威胁,分析了下峪口煤矿的含水层、隔水层特征及其充水水源和充水通道,在此基础上运用突水系数法对11~#煤层突水危险性进行评价。研究结果表明:11~#煤层底板隔水层厚度稳定,岩性致密,阻水性能较好;11~#煤层仅井田浅部一水平与以北邻近一水平边界区域煤层底板突水系数小于0.06MPa/m,为带压可采范围,井田大部分区域底板突水系数为大于0.06MPa/m的危险区与大于0.1MPa/m的极危险区,需要谨慎开采。研究结果为下峪口煤矿带压开采提供了理论指导,有利于实现安全、高效生产。

As Xiayukou Coal Mine is threatened by ordovician limestone water from coal floor when mining 11~# coal seam,thus it is necessary to carry out the feasibility study before the mining under water pressure. By analyzing the aquifer,aquiclude and the water filling sources and passageway,the water inrush risk of 11~#coal seam is evaluated with water bursting coefficient. The results show that the aquiclude in the floor of 11~#coal seam has good water-proof capability with stable thickness and dense lithology; the coal seam floor water burst coefficient of No. 11 coal seam is only a small part area less than 0. 06 MPa/m,most of the areas in the field have a water inrush coefficient of more than 0. 06 MPa/m and a very dangerous area greater than 0. 1 MPa/m,the action of mining need to be performed carefully. The results can provide theoretical guidance for the exploitation of the Xiayukou Coal Mine,which is conducive to the safe and efficient production.