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井下选煤硐室围岩动态监测系统研究
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摘要
煤炭的井下分选排矸可以有效解决煤炭的提升运输效率,以及地面选煤带来的污染等问题,实现节能减排和绿色开采。对煤炭井下分选排矸系统中选煤硐室内的围岩动态监测是亟待解决的关键技术问题之一。本文针对井下选煤硐室特点,提出了一种基于锚杆的围岩绝对位移传感器监测方法和一种基于MEMS传感器的底板变形量监测方法,在现场试验的基础上,进一步对硐室内环境因素对无线电磁波传输可能产生的影响进行了现场测试、数值计算和建模仿真,确定了符合围岩收敛测量要求的传感器节点布置的最佳位置。同时对RI-MAC协议和LEACH路由协议在井下选煤硐室内应用的不足进行了算法改进,并进行了通过建模仿真,改进后的协议更适用于选煤硐室内的无线传输环境。最后构建了井下选煤硐室无线传感器网路拓扑结构,设计了井下选煤硐室围岩动态监测系统,通过室内测试验证了其可行性。
The underground coal preparation technology can realize green mining and solve the pollutionproblems effectively caused by inoue coal preparations, which has become a research hotpot atpresent. Meanwhile the dynamic monitoring methods of surrounding rock in underground coalpreparation chamber need a further more research. This paper proposes a new sensor way tomonitor the absolute displacement of surrounding rocks based on bolt, and a new method tomonitor the floor deformation based on MEMS sensors according to the characteristics ofunderground coal preparation chamber in Shandong xinwen coal mine, which are testedsuccessfully in field. After this, the possible effects to wireless electromagnetic wave transmissioncaused by chamber indoor environment factors are studied through field testing, numericalcalculation and modeling simulation, which makes sure the.best setting position of sensor nodesthat meets the requirements of surrounding rock convergence measurement. At the same time, thealgorithm application deficiencies of RI-MAC protocol and LEACH routing protocol inunderground coal preparation chamber are improved, and the simulation results show that theimproved protocol are more suitable for underground coal preparation wireless environment. Atlast, this research builds a new underground coal preparation wireless sensor network topology,and designs a dynamic monitoring system for underground coal preparation, the feasibility ofwhich are verified by indoor test.
引文
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