高富强

• 1:煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院)
• 2:中煤科工开采研究院有限公司

摘要(Abstract)：

水力压裂技术已经广泛在煤矿应用于处理工作面坚硬顶板问题,但其卸压机理并不十分明确。采用ELFEN数值模拟方法研究工作面坚硬顶板水力压裂处理对采动应力的影响,探讨卸压机理。数值模拟结果显示:对工作面顶板的水力压裂处理,主要是弱化顶板的完整性,使其在工作面推进后能够及时垮落,这种局部垮落,虽然不会显著影响支承压力分布特征,但局部直接顶的及时垮落会引起上覆基本顶和关键层的及时断裂和垮塌,影响采场覆岩大结构,进而影响支承压力分布特征。对工作面顶板进行持续压裂,可以降低初次垮落步距及平均来压步距。

关键词(KeyWords)： 水力压裂;采动应力;数值模拟;卸压机理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51774185)

作者(Author): 高富强

DOI: 10.13532/j.jmsce.cn10-1638/td.20210329.001

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