薄基岩下巷道掘进顶板管控技术研究

煤炭是我国的主要能源,是我国经济发展的基础产业。在煤矿开采的过程当中,为了保证煤矿开采的安全以及煤炭资源开发的质量,需要对煤矿掘进巷道技术和巷道顶板管理等一系列的技术进行研究,顶板事故在煤矿开采的过程中占有很大的比重,甚至会在掘进过程中造成冒顶事故。因此,只有在煤矿掘进过程中全面加强对顶板的控制和管理,才能保证安全掘进。本文结合实际薄基岩下巷道掘进对顶板管理的案例,主要分析薄基岩下巷道掘进顶板管控技术的应用。

大盾构在孤石基岩地层掘进技术研究

以汕头市苏埃通道工程为例,对大盾构在基岩、孤石地层掘进技术进行研究,论述基岩孤石地质盾构掘进施工主要通过参数控制技术、建压技术、进仓技术、刀具技术、试验研究等方面进行说明分析;总结施工过程中刀具管理、掘进参数、建压管理、带压进仓、孤石基岩掘进经验,得出相关规律,为类似地层的盾构施工提供一定的借鉴和指导。

锦界煤矿薄基岩区掘进巷道围岩稳定控制研究

针对锦界煤矿巷道在掘进过程中顶板完整且基岩厚度小的特征,为了控制围岩,降低支护难度,缩小区段煤柱留设宽度提高采出率,研究了薄基岩岩层破断规律,通过数值模拟分析了煤柱的应力分布特征,研究结果表明,区段煤柱宽度为13 m时控制效果及经济效益最佳。

锦界煤矿薄基岩段掘进安全技术对策

锦界煤矿充水水源较为复杂,矿井涌水相对较大,在顺薄基岩段进行掘进时,顶板水害十分严重,需采取相应的技术对策,保证顺薄基岩段施工的安全进行。

厚表土、大坡度斜井施工工艺的应用与探索

该文介绍了厚表土、大坡度条件下斜井的施工工艺,阐述了明槽段、基岩段的基本施工方法。希望该斜井施工方案能对类似条件下的施工起到一定的参考、借鉴作用。

An overview of the thermography-based experimental studies on roadway excavation in stratified rock masses at CUMTB

This paper presents an overview of experimental investigations conducted at China University of Mining and Technology Beijing(CUMTB) on roadway excavation using large-scale geomechanical model tests.The simulated sedimentary rocks are composed by alternating layers of sandstone, mudstone and coal seam inclined at varied angles with respect to the horizontal including 0°, 45°, 60°, and 90°. During the excavation, infrared thermography was employed to detect the thermal response of the surrounding rocks under excavation. The obtained raw thermograms were processed using denoising algorithm, data reduction procedure and Fourier analysis. The infrared temperature(IRT) characterizes the overall rock response; the processed thermal images represent the structural behavior, and the Fourier spectrum describes damage development in the frequency domain. Deeper understanding was achieved by the comparative analyses of excavation in differently inclined rock masses using the image features of IRTs, thermal images and Fourier spectra.