Research On The Optimal Design Of Deep Soft Rock Roadway Supporting Technology

Coal production occupies a very important position,and the research on the stability control technology of soft surrounding rock roadway in deep wells is imminent.Taking the locomotive chamber of Shiyakou Coal Mine in Yunnan Province as an engineering case,this paper conducts a deepening study on the problems of the two sets of deep weak surrounding rock roadway that are easy to extrude and deform inward,the roof is easy to collapse,and the bottom plate is easy to bottom,etc.,and the roadway is very serious,the support is extremely difficult and the support structure fails.According to the field investigation of the project,the original support method and failure inducements of this type of roadway were studied and analyzed,and it was concluded that the main reason for the failure and failure of the roadway(chamber)was that the support structure was unreasonable.An effective support system needs to consider many factors such as the depth of roadway burial,the strength of the surrounding rock of the roadway and its zonal rupture characteristics,and the softening of the surrounding rock by groundwater.This paper mainly conducts in-depth optimization research on the preliminary research results of such topics,aiming to analyze the shortcomings of the original support method and deepen the research on the more optimized support system,mainly to optimize the shape and size ratio of the design roadway section.Through the systematic construction of the formation model,the use of FLAC3 D numerical simulation software to simulate the excavation roadway and its support process,the deformation and damage characteristics of the surrounding rock of the deep soft surrounding rock roadway are studied and analyzed,the surrounding rock deformation characteristics,stress field and plastic zone distribution law of different shapes and sizes of roadway are analyzed and compared,and on the basis of the environmental fusion support technology proposed by this research group,the original scheme and the optimization scheme are simulated respectively to obtain a better scheme for the roadway(chamber)support,so as to improve its support efficiency.Maximize the self-bearing capacity of the surrounding rock,achieve a successful support,save a lot of manpower,financial resources and material resources,ensure that mine production can be carried out safely and normally,and create greater economic and social benefits.