Yankuang Energy Group Co., Ltd.
College of Energy and Mining Engineering, Shandong University of Science and Technology

目前煤矿普遍采用的冲击危险性评价方法忽视了岩层层位、厚度等对冲击危险性评价结果的影响,致使现有冲击危险性评价体系对不同地层结构下顶板冲击危险性评价准确度不足。根据采空区覆岩破坏程度,建立了全悬顶结构、半悬顶结构及完全移动结构3类顶板结构力学模型,分析了各类顶板结构类型下的应力传递机制,提出了基于3类顶板结构与实测矿震数据相结合的动静载叠加应力计算方法及考虑顶板结构特征的冲击危险性评价指标及评价方法,并分析了岩层强度系数、关键层厚度以及岩层下沿距工作面距离对冲击特征参数p的影响规律;依托鄂尔多斯市某矿2201工作面、济宁市某矿63上06工作面及菏泽市某矿3301工作面地层结构条件,进行了顶板岩层结构下动静载叠加应力及冲击危险性评价参数的计算,并根据计算结果进行了冲击危险性评价验证分析。

The commonly employed impact risk assessment methods in coal mining often overlook the significant influences of rock strata positioning and thickness, thereby compromising the accuracy of existing systems in evaluating the roof impact risk across varied geological structures. This study introduced a nuanced approach by constructing mechanical models for three distinct roof structures-fully suspended, semi-suspended, and complete-ly moving—based on the extent of overburden damage in goaf areas. Through an analysis of the stress transmis-sion mechanisms inherent to each roof structure type, a novel dynamic-static coupled stress calculation method was proposed. This method integrates these roof structure models with empirical seismic data from mines, offer-ing a refined impact hazard assessment framework that incorporates roof structural characteristics. The study fur-ther explored the effects of the strata strength coefficient, thickness of key layers, and the proximity of the strata's lower boundary to the working face on the impact characteristic parameter "p". Utilizing the strata structural con-ditions from the 2201 working face in a mine in Ordos City, the 63upper06 working face in Jining City, and the 3301 working face in Heze City, the research undertook calculations for dynamic-static superimposed stresses and impact hazard assessment parameters. The findings, validated through impact hazard assessment analyses based on these calculations, enhance the precision of risk evaluations, indicating that the proposed method effectively ad-dresses the limitations of current assessment practices and offers significant insights for future mining operations.

国家自然科学基金面上资助项目(52374098);山东省自然科学基金优秀青年基金资助项目(ZR202211070181);山东省高等学校青创团队发展计划资助项目(2022KJ212)

王超,张广超,赵西坡,等.基于顶板结构特征的冲击危险性评价方法及应用[J].采矿与岩层控制工程学报,2024,6(2):023531.

WANG Chao, ZHANG Guangchao, ZHAO Xipo, et al. Evaluation method and application of impulse hazard based on roof structure characteristics[J]. Journal of Mining and Strata Control Engineering, 2024, 6(2): 023531.