Qianjiaying Mining Branch, Kailuan Group Corporation Limited Uroica (Shandong) Environmental Engineering
Company Limited

为解决支架压死事故中爆破参数的计算和应用问题,以钱家营矿1295工作面的具体地质条件为研究背景,采用理论分析、数值模拟和现场效果监测相结合的方法,对松动爆破技术在处理工作面支架压死事故中的实际应用效果进行研究。结果表明:采用松动爆破技术能够显著降低工作面压死支架所受到的顶板压力,工作面支架在实施松动爆破后可以依靠自身的支撑压力重新支撑起上覆岩层。在研究炸药爆轰作用过程中,FLAC3D数值模拟软件表现出较高的应用价值,其通过在模型上施加动载荷,观测动载荷对模型的影响,探究了松动爆破参数的可行性及适应性;工程应用结果表明,采用松动爆破技术后顶板压力显著降低,同时,大幅减少了挖底和挑顶的工作量,减轻了工人劳动强度。

In order to solve the calculation and application problems of the blasting parameters applied to the powered support jammed accident, with the certain g eological condition of No.1295 coal mining face in Qianjiaying Mine as the study background, a method combined with the theoretical analysis, numerical simulation an d site effect monitoring and measuring was applied to the study on the actual application effect of standing blasting technology applied to handle the powered support ja mmed accident occurred in the coal mining face. The results showed that the application of the standing blasting technology could obviously reduce the roof pressure af fected to the jammed powered supports in the coal mining face. After the standing blasting conducted, the powered support in the coal mining face could re-support up t he overburden roof with the self support pressure of the powered support. In the study on the detonation role process of the explosives, the performances of the FLAC3 Dnumerical simulation software showed a high application value. With the dynamic loading conducted on the model, an observation was made on the dynamic loading a ffected to the model and a study was conducted on the feasibility and suitability of the standing blasting parameters. The engineering application results showed that aft er the standing blasting technology applied, the roof pressure was obviously reduced. Meanwhile, the work load of the floor excavation and roof ripping was highly redu ced and the labor intensity of the miners was reduced.