摘要
为了减少大宁煤矿综采工作面强烈矿压引起的巷道破坏、提高工作面推进速度、减少复用巷道巷修工程,缓解工作面接替紧张的现象,通过对液态二氧化碳致裂、爆破致裂、水压致裂煤岩体的3种方式进行分析。结合大宁煤矿突出矿井、大煤柱护巷的布置方式以及工作面顶板特性,采用水压致裂的方式,对工作面顺槽及切眼顶板进行预裂,从而改变采场大结构产生的应力集中分布,减少巷道围岩破坏。运用理论计算的方式,确定了水压致裂关键技术参数,并提出了高压胶囊分割,实现分段压裂的方式充分保证致裂效果。
In order to reduce the roadway damage caused by the strong mine pressure in the fully mechanized mining face of Daning coal mine, improve the advancing speed of the working face, reduce the reuse of the roadway repair project, and relieve the tension of the working face replacement,analyzes three ways of coal and rock fracture caused by liquid carbon dioxide, blasting and water pressure. Combined with the layout of the outburst mine, the pillar roadway and the characteristics of the roof of the working face, the hydraulic fracturing method is selected to pre crack the roof of the working face along the trough and the cut hole, so as to change the stress concentration distribution of the large structure of the stope and reduce the damage of the surrounding rock of the roadway. The key technical parameters of hydraulic fracturing are determined by theoretical calculation, and the high-pressure capsule segmentation is proposed to ensure the fracturing effect.
作者
韩俊效
HAN Jun-xiao(Shanxi Yamei Daning Energy Co.,Ltd.,Yangcheng 048114,China)
出处
《煤炭技术》
CAS
2020年第8期119-122,共4页
Coal Technology
关键词
强烈矿压
切顶卸压
水压致裂
strong mine pressure
pressure relief by cutting
hydraulic fracturing
