巴拉素煤矿先期开采地段顶板涌(突)水危险性评价及防治措施

Risk Evaluation of Roof Water Inflow(Inrush) and Prevention and Control Measures in Early Mining Areas of Balasu Coal Mine

陕北侏罗纪煤田内各矿井多年来受煤层顶板水害影响严重。为有效遏制该类水害威胁打好基础,以巴拉素煤矿先期开采地段为例,结合充水含水层厚度、岩心采取率、渗透系数、单位涌水量和物探工程成果等多元地学信息,采用"三图-双预测法",通过叠加分析,最终得到煤层顶板涌(突)水条件综合分区图。研究表明:直罗组含水层水将为研究区全区未来开采的主要充水水源,其相对富水的中西部及东部区域,即为研究区顶板涌(突)水的威胁地段。针对矿井未来面临的水害问题,提出相应合理有效的防治措施。

The coal mines in Jurassic coal field in northern shaanxi have been seriously affected by the water damage on the roof of coal seam for many years. In order to effectively curb this threat of such water hazards, taking the early mining areas of Balasu Coal Mine as an example, combined with the multiple geoscience information, such as the thickness, the adoption rate of the cores, the permeability coefficient, the specific yield of the water filling aquifers, and the results of geophysical exploration engineering, etc., by using the "three-graphic two-prediction method", through the overlay analysis, the comprehensive partition map of the coal seam roof water inflow(inrush) conditions is obtained. The study showed that the water of Zhiluo Formation aquifer is the main water filling source for the future exploitation of the whole study area, and the relative water rich regions are distributed in midwestern and eastern of the study area, these are also the roof water inflow(inrush) threat areas. Aiming at the problems that the mine water hazards will be faced with in the future, the relevant reasonable and effective prevention and control measures are proposed.