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大埋深复杂水文地质条件工作面防治水技术研究
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摘要
煤层底板突水是严重影响我国煤矿资源安全开采的主要危害之一。随着开采深度不断增加,矿井水文地质条件更加复杂,研究大埋深复杂水文地质条件工作面开采技术研究对于保证矿井安全生产具有重要意义。论文以水文地质条件评价、现场观测、实验室相似模拟试验、数值模拟为基础,采用材料力学、弹性力学和损伤力学等固体力学理论,运用人工智能预测方法,较全面地研究了大埋深复杂水文地质条件工作面开采技术,主要包括矿井水文地质规律、底板破坏规律、底板注浆加固技术、断层采动破坏规律,得出了复杂水文地质条件地下水的赋存、运移规律,分析评价了试验工作一突水可能性;建立了底板破坏深度预测模型,得出了底板破坏深度;建立了成套的底板加固技术,设计了“分散制浆、细管输浆、双重固管防喷、反复透孔注浆”的超高压注浆方法;建立了“顺槽的防冲防倒装置,巷道的可缩高强闭合支护技术、建井期问防淹矿井措施”组成的矿井水害防治技术。论文研究成果在赵固二矿成功进行了应用,取得了显著的经济效益。
Water inrush from coal floor has been one of the big disasters that endanger the security of the mining production in China. The mine hydrogeology conditions become more and more complicated with the increase of mining deepness. The study of working face mining technology with complicated hydrogeology condition at great depth has important significance for ensuring mine safety production. Based on the analysis of hydrogeological conditions, field observation, laboratory similar simulation experiment, numerical simulation, the thesis adopts theories of material mechanics, elastic mechanics, damage mechanics and so on, applies artificial intelligence prediction method to study comprehensively working face mining technology with complicated hydrogeology condition at great depth. It mainly includes mine hydrogeology law, bottom failure law, bottom grouting reinforcement technique, fault mining failure law, which was obtained law of groundwater storage and migration. Analysis and evaluation are made regarding to water inrush possibility from test working face. The thesis establishes prediction model that obtain depth of destroyed bottom. And it also establishes complete set of bottom reinforcement technique, the grouting method with superhigh pressure, including dispersed pulp, slurry with thin pipeline, double reinforced pipe to prevent blowout and repeated grouting, was designed. Furthermore, it establishes coal mine water hazard control technique, such as crossheading tilting prevention device, contractible high-strength closed supporting technique, prevent flooded measure during shaft construction. The research results were used in Zhaogu No.2coal mine, which has achieved remarkable economic benefit.
引文
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