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为解决五阳煤矿坚硬顶板大跨度煤巷强动压下底鼓强烈控制困难的问题,理论分析得到强动压大跨度煤层巷道底鼓特征和失稳机理,提出坚硬顶板预裂卸压、优化煤柱宽度、巷帮注浆和底板补强的协同控制技术。数值模拟和现场实测表明:坚硬顶板预裂卸压和优化煤柱宽度使得巷道处于低应力环境,巷帮注浆和底板补强能提高巷道抵抗变形能力,实现了巷道与围岩在应力环境和强度的协同,稳定后的巷道底鼓量为167 mm,顶板下沉量为116 mm,两帮移近量为141.5 mm,有效地控制了巷道底鼓。
In order to solve the problem of strong control of the bottom drum with strong dynamic pressure in the coal roof of the long-span coal roadway in Wuyang Coal Mine, the characteristics of the bottom drum and the instability mechanism of the coal mine tunnel with strong dynamic pressure and long-span are obtained through theoretical analysis. Coal pillar width, laneway grouting and floor reinforcement synergic control technology. Numerical simulations and field measurements show that the prestressed pressure relief of hard roof and the optimization of coal pillar width make the roadway be in a low stress environment. The grouting of the roadway and reinforcement of the floor can improve the deformation resistance of the roadway. Strength of the synergy, stable roadway drum volume after the end of 167 mm, the amount of roof sinking 116 mm, the amount of two to move nearly 141.5 mm, effectively controlling the roadway drum.