摘要
华北地区石炭-二叠系煤层山东黄河北煤田受顶-底板灰岩含水层水害威胁,下组煤开采风险极大。针对此类地质条件,经分析、总结、探索,提出了一种双层多分支顺层钻孔注浆改造顶-底板灰岩含水层方法,实现了对顶-底板灰岩含水层的治理。该方法创新采用了顶底板钻孔共用一开段,根据岩层赋存情况,确定了不同治理目标,并采取了针对性的治理方法。利用COMSOL Multiphysics对目标岩层治理参数进行了数值模拟,并结合国内类似条件治理经验,确定了合理的注浆参数和钻孔间距。该方法应用后,实现了下组煤的安全开采,为黄河北煤田受水威胁的10多亿吨煤炭资源的开发,以及受顶底板水威胁的类似矿井及非煤矿山,提供了可靠的技术方法和科学的指导,并具有巨大推广应用前景。
In the Carboniferous-Permian coal seam in North China, the Huanghebei coalfield in Shandong is threatened by the water hazard from the roof-floor limestone aquifer, and the mining risk of the lower coal group is extremely high. In respect of such geological conditions, and as a result of analysis, summarization and exploration, a method of double-layer multi-branch drilling grouting to transform roof-floor limestone aquifers is proposed in this article, which enables the management of roof-floor limestone aquifers. This method innovatively adopts an open section common to roof and floor drill-holes, and is used to set different management targets according to the occurrence of rock formations, in addition to specific management methods. COMSOL Multiphysics is used for numerical simulation of the control parameters of the target rock formations, and reasonable grouting parameters and drilling spacing are determined in conjunction with control experience under similar conditions in China. After the application of this method, the safe mining of the lower coal group has been realized, and it has provided a reliable technological method and scientific guidance for the development of the more than 1 billion tons of coal resources threatened by water hazard in Huanghebei coalfield, as well as other similar mines and non-coal mines threatened by roof and floor water hazard. Meanwhile, this method has great application prospects.
作者
贺敬平
周景凯
刘培跃
HE Jingping;ZHOU Jingkai;LIU Peiyu
出处
《中国矿山工程》
2022年第1期67-76,共10页
China Mine Engineering
基金
国家基金委面上项目:52178338
山东省重点基金项目:ZR2020KE006。
关键词
灰岩含水层
承压水
注浆
双层多分支顺层钻孔
limestone aquifer
confined water
grouting
double-layer multi-branch drilling
