综采工作面坚硬顶板超前松动爆破强制放顶技术实践

Technical practice of forced roof caving by advanced loose blasting on hard roof of fully mechanized mining face

为保证8210工作面回采期间液压支架和煤壁的稳定性,通过具体分析基本顶的回转角度对支架和煤壁的影响规律,并结合工作面的情况对超前松动爆破方案进行具体设计,并对工作面松动爆破后的回采效果进行分析。结果表明:工作面采用超前松动爆破后,回采过程中煤壁片帮得到了有效控制,保证了液压支架的稳定。

In order to ensure the stability of the hydraulic support and the coal wall during the mining of 8210 working face, the influence law of the rotation Angle of the basic roof on the support and the coal wall was analyzed in detail, and the advance loose blasting scheme was designed in combination with the working face, and the mining effect after the loose blasting of the working face was analyzed. The results show that the slabs of coal wall are effectively controlled in the mining process and the hydraulic support is stable after the working face adopts the advanced loose blasting.