煤矿安全2024，Vol.55Issue(11)：176-185,10.DOI:10.13347/j.cnki.mkaq.20240877
园子沟煤矿顶板离层突水机制及地面井下联合防治技术
Water inrush mechanism of roof bed-separation and surface-underground combination treatment technology in Yuanzigou Coal Mine
摘要
Abstract
Yuanzigou Coal Mine belongs to Yonglong Mining Area of Huanglong Jurassic Coalfield,which is located in the south-central part of the Ordos Basin,and the main water hazard type is bed-separation water inrush.Using the borehole flushing fluid leakage and borehole television observation methods,the cracking and production ratio of the No.2 coal seam fully mechanized min-ing face was determined by designing the pre-mining and post-mining comparison boreholes.In order to ensure the safe mining of the 1012102 working face,according to the measured results of mining overburden failure and the characteristics of the geological structure of the rock layer,based on the key layer theory and the thin plate theory,the bed-separation development position,the risk of the water inrush and the mud and sand collapse of the bed-separation were evaluated.In view of the characteristics of this kind of bed-separation water inrush with hysteresis,periodicity,accompanied by secondary disasters such as sand collapse and roof pressure,a layered water treatment technology based on the combination of surface through-type drainage hole and underground dredging hole well was proposed.The research results show that the crack-to-mining ratio is 23.68 under the geological and mining conditions,and the conditions for the formation of bed-separation in Luohe Formation,Yijun Formation and Anding Formation are all available,and the volume of the separation cavity is large,and the mine is mainly threatened by the roof separation water hazard,and the sediment will be carried once the water inrush occurs.The change of water level data and the supplementary detection of ground electric meth-od in the mining process realize the all-round monitoring of the overlying rock separated layer water,form a pre-control technology system for the separated layer water,and ensure the safe mining of the mine.关键词
矿井水害防治/离层突水机制/危险性评价/地面泄水孔/电法勘探/井下疏放水孔Key words
mine water disaster control/water inrush mechanism of bed-separation/hazard assessment/surface relief hole/electric-al exploration/underground dredging hole分类
矿业与冶金引用本文复制引用
杜林,李江华,李耀斌,华可,孙维成,李鹏飞,张豪哲..园子沟煤矿顶板离层突水机制及地面井下联合防治技术[J].煤矿安全,2024,55(11):176-185,10.基金项目
煤炭科学技术研究院有限公司科技发展基金资助项目(2023CX-I-03) （2023CX-I-03）
国家自然科学基金青年科学基金资助项目(52104196,51804162) （52104196,51804162）
