Prediction and control of rock burst of coal seam contacting gas in deep mining

By analyzing the characteristics and the production mechanism of rock burstthat goes with abnormal gas emission in deep coal seams,the essential method of eliminatingabnormal gas emission by eliminating the occurrence of rock burst or depressingthe magnitude of rock burst was considered.The No.237 working face was selected asthe typical working face contacting gas in deep mining;aimed at this working face,a systemof rock burst prediction and control for coal seam contacting gas in deep mining wasestablished.This system includes three parts:① regional prediction of rock burst hazardbefore mining,② local prediction of rock burst hazard during mining,and ③ rock burstcontrol.

物联网智能燃气表燃气异常状态感知与控制

分析燃气异常状态感知和控制技术(包括燃气泄漏安全切断技术、流量异常安全切断技术、压力异常安全切断技术)。提出一种物联网智能燃气表燃气异常状态感知和控制系统,该系统由对象平台、传感网络平台、燃气公司综合管理平台、服务平台、用户平台构成,每一平台均具有特定的物理实体,以实现不同的功能。该系统对燃气异常状态的感知信息具有5种处理形式,不同处理形式用于对不同的感知信息进行分析判断,生成控制信息,由物联网智能燃气表执行控制。系统具有燃气使用安全功能状态评估功能,能够对系统的感知功能状态和控制功能状态进行检测,还能够对物联网智能燃气表所处环境中的可燃气体浓度水平持续监测的功能状态进行检测。