摘要
为合理确定工作面顶板含水层采前预疏降的安全水位,提出基于工作面排水能力确定安全水位的方法。应用数值模拟方法,根据钻孔资料建立开采区域岩层的三维地质模型,通过抽水、放水和注水试验数据对疏放水目标含水层初始流场进行富水性分区和参数率定。通过建立工作面采前预疏降的地下水流场概化模型,计算分析了不同疏水强度条件下含水层终态水位变化趋势,并根据不同疏水强度的终态水位,模拟计算了工作面生产期间的最大涌水量,总结形成了依据工作面排水能力,确定顶板含水层采前预疏放安全水位的方法。现场应用结果表明,该方法计算值与工作面实际涌水量接近,可作为顶板含水层采前预疏放安全水位的判定依据。
In order to rationally determine a pre-drainage safety water level of the aquifer in the roof above the coal mining face before the mining operation,a method to determine the safety water level was provided based on the water drainage capacity of the coal miming face.a numerical simulation method was applied to establish a 3D geological model of the rock strata in the mining area according to the borehole information. With the data of the water pumping,water drainage and water injection test,the watery division and parameter rate were conducted on the initial flow field of the water drainage target aquifer. With the establishment on the pre-drainage underground water flow field generalized model before the drainage operation of the coal mining face,the final water level variation tendency of the aquifer was calculated and analyzed under the condition of different water drainage intensity. According to the final position water level under the different water drainage intensity,the max water inflow during the production period of the coal miming face was simulated and calculated and the method to determine the water pre-drainage safety water level before the mining operation of the coal mining face was summarized and formed according to the water drainage capacity. The site application results showed that the calculation value of the method and the face actual inflow were close and could be the judgment criteria to the pre-drainage safety water level of the roof aquifer before the mining operation of the coal miming face.
出处
《煤炭科学技术》
CAS
北大核心
2017年第3期161-165,共5页
Coal Science and Technology
基金
国家自然科学基金青年基金资助项目(51504136)
关键词
采前疏降
顶板水害防治
安全水位
流场分析
water drainage before mining operation
roof water disaster prevention
safety water level
flow field analysis
