基于数值计算的断层群小断面巷道稳定性分析  

Stability analysis on small section roadway of fault group based on numerical calculation

作　　者：赵研 秦洪岩 商佳新 Zhao Yan;Qin Hongyan;Shang Jiaxin(Hulusu Mine,Zhongtian Hechuang Energy Co.,Ltd.,Ordos 017000,China;North China Instiutute of Science and Technology,Beijing 101601,China)

机构地区：[1]中天合创能源有限责任公司葫芦素煤矿,内蒙古鄂尔多斯017000 [2]华北科技学院,北京101601

出　　处：《煤炭与化工》2022年第8期26-28,32,共4页Coal and Chemical Industry

基　　金：国家自然科学基金(51274106)。

摘　　要：为分析塔营煤矿过断层小断面支护方案的可行性,本文拟采用数值模拟的方法开展研究。根据矿方提供的现场工程实践数据设计巷道支护方案,并根据煤矿的地质和采矿条件建立数值模拟模型。在模拟过程中根据支护方案和采矿条件,分析巷道掘支后的巷道应力分布和锚杆锚索受力情况。从分析的结果可看出,设计锚网喷索联合支护方案,围岩应力得到改善,浅支撑层厚度较小,而深支撑层内围岩应力分布较均匀,充分调动了围岩的承载能力;小断面巷道处于3煤中,两帮变形较明显,顶底板围岩稳定性较好,顶板锚索受力合理,两帮部分锚杆接近极限荷载。In order to analyze the feasibility of small section support scheme in Xinyuan Mine,the method of numerical simulation was used to carry out research.According to the field engineering practice data provided by the mine,the support scheme of the tunnel was designed,and the numerical simulation model was established according to the geological and mining conditions of the coal mine.In the simulation process,according to the support scheme and mining conditions,the stress distribution of the roadway after excavation and support and the stress of anchor cable were analyzed.It could be seen from the analysis results that in the design of bolt net and shotcrete cable combined support scheme,the stress of surrounding rock was improved,the thickness of shallow support layer was smaller,and the stress distribution of surrounding rock in deep support layer was more uniform,which fully mobilized the bearing capacity of surrounding rock;the small section roadway was in the No.3 Coal Seam,the two sides were obviously deformed,the stability of roof and floor surrounding rock was better,and the stress of roof anchor cable and anchor cable was more reasonable,while the two sides were more uniform and the upper anchor was close to its ultimate load.

关 键 词：巷道支护 围岩控制 数值模拟 小断面支护 

分 类 号：TD353[矿业工程—矿井建设]