深部巷道大型交岔点施工及稳定性研究

Research on Stability and Construction of the Large Intersections of Deep Roadway

建立基于熵的模糊数学定量评价模型,选择埋深、围岩强度、测压系数、交叉点结构、施工方式作为影响大型交叉点施工稳定性的因素。并以城郊煤矿二十采区轨道巷车场与该轨道巷大型巷道交岔点施工为例,采用放小炮施工、锚索紧跟迎头、施工暗锚索、施工结束后用锚索梁加固等,达到了预期效果,保证了交岔点施工过程正常有序地进行。通过对交叉点稳定性的模糊综合评价,引进热力学熵与信息熵的概念,定量求得各个因素的权重,获得评价因素的权向量,并与实际情况对比,既证明了评价结果的准确性,也说明了本次施工技术的合理性。对以后交叉点施工有重要的指导意义。

The depth,strength of surrounding rocks,pressure coefficients,intersections structure, construction methods are selected as the factors that affect the stability of large intersection construction so as to establish the fuzzy mathematical quantitative evaluation model based on entropy. Taking the intersections construction of the track lane yard of the twentieth mining area of Chengjiao coal mine and the large track lane roadway as an example,small blasting construction method,anchor cables with dark anchor cables construction method,anchor beams reinforcement method are adopted to guarantee the intersections construction smoothly. The concepts of thermodynamic entropy and information entropy are introduced to calculate the weight of each factor,so,the weight vectors of the evaluation factors are acquired so as to to conduct fuzzy comprehensive evaluation on the stability of intersections. Compared with the actual situations,the accuracy of the evaluation results are proved and the rationality of the construction method are verified. Therefore,the research results of this paper have important guiding significance to the intersections construction in the future.