Research on strata behaviors law of bolting with wire mesh roadway affected by strong dynamic pressure

In order to obtain the strata behaviors law of roadway affected by strong dynamic pressure,taking full coal roadway affected by mining dynamic pressure fro m Pingshuo Underground No. 1 Mine as the study subject,the numerical simulation,bolt nondestructive test,surrounding rock deformation observation and other methods W ere used to analyze the stress environment which surrounding rock involved and the stress distribution,evaluate the force of roof bolt in the entire length of roadway,determ ine the scope of stress concentration area in roadway and the impact factors,and summarize the surrounding rock deformation law. The results showed that the stability of middle and coarse sandstone roof were better which could reduce stress concentration degree of the horizon of roadway. The surrounding rock affected by faults and colla pse column and other geological tectonic,the force of regional anchor in about 30% roadway was greater than 60 k N,the roadway strata behaviors in the region was more i ntense,dynamic pressure ahead of the impact of mining face in the range of 60 m,dynamic pressure roadway affected by the total length of up to 180 m. The geological tect onic weak location of tunnel should be appropriate to strengthen support outside the mining affected areas and should speed up the advance rate of working face.