基于工作面来压特征确定顶板断裂带高度及其验证

Determining the roof fracture zone height based on the characteristic of the working face pressure

为深入研究工作面来压特征与顶板断裂带高度的关系,以越南河林煤矿J7408工作面为研究对象。首先通过实验确定顶板的岩石力学参数和综合柱状图,应用实验数据采用关键层理论分析得出顶板的来压特征。在工作面开采前设计矿压监测方案,对比得出理论分析矿压显现特征与实测数据反应的来压特征保持一致。根据来压特征和综合柱状图,分析得出断裂带高度为94.7 m,物理探测得到顶板断裂带高度为86.1 m。采用对比分析来压特征和顶板综合柱状图确定断裂带高度的方法得到的结果与物理探测断裂带高度的结果吻合,说明该方法可行。

In order to in-depth study the relationship between face pressure characteristic and the height of roof fracture zone,J7408 work face of Helin coal mine in Vietnam was selected as the research object. Its coal seam comprehensive bar chart and mechanical parameters were adopted by physics experiment in the first place. The roof weighting characteristics was studied by the result of key strata theory to analysis experimental data. Mine pressure monitoring program should be designed before mining the work face. The results about mine pressure characteristics of theoretical analysis between measured data are same. Fracture zone height was 94. 7 m by analysis and the height of roof fracture zone is 86. 1 m by physical detection. The height of analysis on working face pressure and coal seam comprehensive bar chart is similar to the measured data that shows this method is right.