摘要
深部冲击地压频繁发生且日趋严重,开采深度大、主控因素不清、防冲方案不合理等是灾害频发的主要原因。为进一步提高深部冲击地压工作面安全高效开采,以新安矿为研究背景,从矿井尺度、煤岩层冲击特性、煤层赋存条件、能量理论4个尺度构建工作面冲击危险性评估体系,该工作面具备发生动力灾害的地质动力条件,煤岩体具有弱冲击倾向性,致冲主控因素为顶板断裂;运用数值模拟、工程经验等方式分析工作面防冲方案,针对顶板断裂采用数值模拟对钻孔参数进行优化,提出参数为夹角60°、长度16 m、间距5 m,并提出煤层卸压、底煤的处理方案;采用微震监测、电磁辐射法、钻屑法进行验证,监测数据表明,工作面防冲方案设计科学合理,效果良好。研究成果为工作面安全高效生产提供有利保障。
Deep rock bursts frequently occur and become increasingly serious. The main reasons for frequent disasters are large mining depths, unclear main control factors, and unreasonable anti-scouring schemes. In order to further improve the safe and efficient mining of the deep rock burst working face,taking the mining face in Xin′ an coal as the research background, based on the four scales of mine scale, coal and rock impact characteristics, coal seam occurrence conditions and energy theory, the shock hazard evaluation system of the working face is constructed. The working face has the geo-dynamic conditions for dynamic disasters. The coal and rock mass has a weak impact tendency. It is determined that the main controlling factor of rockburst is roof fracture. The design of the anti-scourage scheme in the working face adopts numerical simulation, engineering experience, etc. Aiming at the main controlling factor-roof fracture, numerical simulation is used to optimize the drilling parameters.The parameters are proposed as an angle of 60°, a length of 16 m, and a spacing of 5 m. At the same time, the coal seam pressure relief and bottom coal treatment plan are proposed. Using microseismic monitoring and early warning, electromagnetic radiation method, drill cuttings method for verification,the monitoring data shows that the design of the working face anti-scouring plan is scientific and reasonable, and the effect is good. The research results provide a favorable guarantee for the safe and efficient production of the working face.
作者
邸帅
王迪
梁壮
付恩三
DI Shuai;WANG Di;LIANG Zhuang;FU Ensan(Information Research Institute of the Ministry of Emergency Management,Beijing 100029,China;Research Center Institute of the Ministry of Emergency Management,Beijing 100713,China)
出处
《煤炭技术》
CAS
北大核心
2022年第6期125-129,共5页
Coal Technology
