首页|基于UDEC的复合顶板端面冒顶影响因素研究

基于UDEC的复合顶板端面冒顶影响因素研究

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针对大埋深复合顶板端面易冒顶,煤壁易片帮等问题,以孙疃煤矿7242工作面为背景,采用理论计算及数值模拟等方法,从端面距、支架工作阻力、顶板黏聚力3个方面对复合顶板端面冒顶影响规律进行研究.研究结果表明:端面距是影响端面冒顶的主要因素,降低端面距可以减少顶板裂隙的发育,提高端面顶板的稳定性;支架工作阻力间接影响端面顶板的稳定性,支架工作阻力的大小与顶板裂隙发育高度及冒顶片帮事故负相关;较大黏聚力的岩体对于提高端面顶板稳定性有着积极作用.基于研究结果,有针对性地提出支架工作阻力提升至6800 kN,端面距控制为0.3 m,及时维护工作面顶板和煤壁稳定性的控制措施,现场实施结果证明,针对性措施保障了端面顶板的稳定性.
Research on the Influencing Factors of Roof Falling at the End Face of Composite Roof Based on UDEC
In response to the problems of easy roof falling at the end face and easy spalling of coal wall for the composite roof with large burial depth,taking the 7242 working face of Suntuan Coal Mine as the background,theoretical calculation and numerical simulation methods were used to study the influence rules of roof falling at the end face from three aspects,including end face distance,support working resistance,and roof cohesion.The research results indicate that end face distance is the main factor affecting roof falling at the end face,and reducing end face distance can reduce the development of roof fracture and improve the roof stability at the end face.The support working resistance indirectly affects the roof stability at the end face,and the magnitude of the support working resistance is negatively correlated with the height of fracture development in the roof and the occurrence of roof falling accidents.Rock masses with high cohesion have a positive effect on improving the roof stability at the end face.Finally,based on the results,targeted stability control measures have been proposed,such as increasing the support working resistance to 6800 kN,controlling the end face distance to 0.3 m,and timely maintaining the stability of roof and coal wall.The application results verified that the proposed measures can ensure the roof stability of the end face.

Composite roofRoof falling at the end faceFracture developmentEnd face distanceRoof stability

叶敏杰、李英明、黄晨瑞、程素娟

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安徽理工大学矿业工程学院,安徽淮南市 232001

复合顶板 端面冒顶 裂隙发育 端面距 顶板稳定性

2024

矿业研究与开发
长沙矿山研究院有限责任公司 中国有色金属学会

矿业研究与开发

CSTPCD北大核心
影响因子:0.763
ISSN:1005-2763
年,卷(期):2024.44(3)
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