Research on key technologies of safety monitoring and early warning for underground reservoirs in coal mine
In response to the current situation of the lack of comprehensive safety monitoring methods for underground water reservoirs in coal mine,the main safety influencing factors and the stress situation of the artificial dam and the water-retaining coal pillar in the end-mining area of the working face in the process of the water regulation of the underground reservoir were analyzed,and the safety monitoring sensor arrangement scheme of artificial dam and water-retaining coal pillar was designed on this basis,and the whole safety monitoring scheme of underground reservoir was formed by cooperating with water level and quantity monitoring.The monitoring and early warning methods for safety monitoring parameters such as gas concentration,water level,water quantity,surface strain,borehole stress and seepage pressure were put forward based on the actual situation on site,and a single sensor grading alarm method was established with a focus on monitoring data of drilling stress and seepage pressure,and a graded early warning method was established for the overall safety status of artificial dam and water-retaining coal pillars.The safety monitoring system of underground reservoirs in coal mine was designed,the structure of system and data flow was constructed,and the data flow of key points was established,and the real-time monitoring of key parameters of underground reservoirs,real-time analysis and early warning of single sensor,real-time analysis and early warning of artificial dam and water-retaining coal pillar were realized.Taking Liuta Coal Mine as an example,the field application of the designed monitoring scheme,the analytical early warning method and the safety monitoring system was carried out,the application results showed that the monitoring method and early warning method could detect the abnormality of water-retaining coal pillar and artificial dam in advance,and the analysis results were highly consistent with the phenomena of water seepage and leakage appeared on site.The designed monitoring scheme,analysis method and the deployment of monitoring system could improve the water storage safety of coal mine underground reservoir to a certain extent.
underground reservoirwater-retaining coal pillarartificial damsafety monitoringgraded early warning
万方数据
维普
