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为了分析深埋薄基岩煤层采场压架致灾机理,采用物理实验、数字图像处理技术、现场实测等综合研究方法,对淮南矿区深埋薄基岩煤层采场顶板破断特征及机制进行了探讨。得出了在松散承压含水层载荷传递作用下,深埋薄基岩采场顶板破断存在大、小周期来压现象;薄基岩煤层采场上方存在着一倾斜块体承载区,在承担上覆岩层载荷的同时向低位岩层传递压力;低位关键层破断时形成采场小周期来压,之后由于力的传递作用,导致上覆岩层内部原生裂隙扩展、次生裂隙发育,倾斜块体承载能力弱化,其范围向着更高更宽方向发展,当高位关键层破断时倾斜块体承载区达到最大,形成采场大周期来压;大周期来压时易发生采场压架致灾事故。
In order to analyze the disaster mechanism of the stope ram in the deep thin bedrock coal seam, the roof breakage characteristics and mechanism of the stope of the deep thin bedrock coal seam in Huainan Mining Area were studied by comprehensive research methods such as physical experiment, digital image processing technology and field measurement. Discussion. It is concluded that under the load-bearing of unconsolidated confined aquifer, the roof of deep-buried thin bedrock has the phenomenon of large and small periods of crushing. There is an inclined block bearing zone above the stope of thin-bedrock coal seam. The overlying strata load is transmitted to the lower strata at the same time; when the lower strata breaks down, a small stope is formed to pressure the stope; and then due to the transmission of force, the primary fracture in the overlying strata expands, secondary cracks develop, The ability to weaken, its range toward higher and wider direction of development, when the high key layer is broken when the block bearing area to reach the maximum, the formation of large stope to stope to pressure;