顶板巨厚半透含水层“递进渗流”疏降规律

秦忠诚; 刘利宁; 瞿衡哲; 聂　旺

顶板巨厚半透含水层“递进渗流”疏降规律

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出版历程
- 发布日期: 2020-10-19

Drainage Law of “Progressive Seepage” in Large Thick Semi-Permeable Aquifer of Roof

摘要

摘要: 基于某矿第二阶段盘区开采“限高开采”防治水技术效果较差、洛河组含水层水害严重等问题,结合含水层精细探查资料提出了顶板巨厚半透含水层“递进渗流”充水模式,并通过构建数学模型、数值模拟、现场监测等方法进行了论证。通过现场实际表明:该矿在顶板裂缝带波及洛河组含水层时,采用以往的含水层整体疏降条件下的解析法计算时,预测工作面涌水量可达到近4 000 m3/h;而在“递进渗流”充水模式的指导下,回采期间304、206工作面涌水量分别为302、200 m3/h;这一结果充分验证了该矿有别于传统水位整体疏降的“递进”式水位疏降模式。
- 巨厚半透含水层 /
- 递进渗流 /
- 渗透系数垂向衰减模型 /
- 数学模型 /
- 导水断裂带
Abstract: To solve the problems such as the poor effect of water control technology for “high limit mining” and the serious water disaster of the aquifer of Luohe Formation in the panel mining of the second stage in a coal mine, combined with the fine exploration data of aquifer, the mode of “progressive seepage” water filling in the large thick semi-permeable aquifer of the roof is proposed, which is demonstrated by the　mathematical model establishment, numerical simulation and field measurement. The field tests show that when the roof fracture zone spreads to the aquifer of Luohe Formation, based on the previous analytical method under the condition of overall drainage of aquifer, it is predicted that the water inflow of working face can reach nearly 4 000 m3/h. However, under the guidance of “progressive seepage” water filling mode, the water inflow of working face No.304 and No.206 during stoping is respectively 302 m3/h and 200 m3/h. The results fully verify that the drainage method of the
- coal mine is large thick semi-permeable aquifer /
- progressive seepage /
- vertical attenuation model of permeability coefficient /
- mathematical model /
- water-conducting fracture zone

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参考文献(16)

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