Research and comparative analysis of mine water inflow prediction method:a case study of Donggou Coal Mine in Xinjiang
周全超王丹丹党志伟霍超苏杰刘春宇顾雷雨李继升
ZHOU Quanchao;WANG Dandan;DANG Zzhiwei;HUO Chao;SU Jie;LIU Chunyu;GU Leiyu;LI Jisheng
华能煤炭技术研究有限公司中国煤炭地质总局勘查研究总院中国自然资源航空物探遥感中心中煤地质集团有限公司
矿井涌水量的预测对煤矿的安全生产具有重要意义。水文地质参数的准确选择、计算方法的选择对矿井涌水量的准确预测影响巨大,同时考虑到矿井开采实际,涌水量不是从开采初期就稳定不变的,而是动态变化的。为提升涌水量预测的准确度,更好地为煤矿开采服务,在分析新疆东沟煤矿地质及水文地质条件,选取准确水文地质参数的基础上,选择了2种适用于东沟煤矿的涌水量预测方法进行了对比分析。计算结果表明:① 非稳定流释水−断面流法计算得到的涌水量呈现动态变化特征,采掘强度稳定后,变化幅度变小,最后趋于稳定;② 采用大井法、非稳定流释水−断面流法计算得到的预测涌水量分别为3 396 、599.87~612.9 m3/d与实际涌水量480 m3/d分别相差607.5%>24.97%~27.69%;③ 根据矿井实际开采产生的涌水量数据验证分析,采用非稳定流释水−断面流法计算得到的涌水量与实际开采产生的涌水量基本吻合,涌水量预测结果的准确度依次为非稳定流释水−断面流法>大井法;④ 在资料充足、参数准确的情况下,建议优先选择非稳定流释水−断面流法计算涌水量,在补水边界条件差且符合大井法要求的条件下建议首先选用大井法。本次计算结果一方面充分验证了非稳定流释水−断面流法的准确度,另一方面为煤矿矿井涌水量计算提供了借鉴,同时也为东沟煤矿的安全生产提供了数据支撑。
The prediction of mine water inflow is of great significance to the safe production of coal mines. The accurate selection of hydrogeological parameters and the selection of calculation methods have a great influence on the accurate prediction of mine water inflow. At the same time, taking into account the actual mining of the mine, the water inflow is not stable from the early stage of mining, but dynamic. In order to improve the accuracy of water inflow prediction and better serve coal mining, based on the analysis of geological and hydrogeological conditions of Donggou Coal Mine in Xinjiang and the selection of accurate hydrogeological parameters, two water inflow prediction methods suitable for Donggou Coal Mine were selected for comparative analysis. The calculation results show that : ①The water inflow calculated by the unsteady flow water release-section flow method shows dynamic change characteristics. After the mining intensity is stable, the change range becomes smaller and finally tends to be stable. ②The predicted water inflow calculated by the large well method and the unsteady flow water release-section flow method is
矿井涌水量预测大井法非稳定流释水−断面流法小东沟煤矿
mine water flow prediction;virtual large diameter well method;unsteady water release cross section flow method;Xiaodonggou Coal Mine
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会