Study on roadway repair technology in complex surrounding rock disaster environment

In view of the phenomenon that the transportation roadway of 110207 working face in Maiduoshan coal mine is influenced by the complex surrounding rock stress and the roof appears to crack and sink.This paper analyzes the form of the surrounding rock disaster and the deformation mechanism of the surrounding rock of the roadway, it is put forward that the coordination between the support and the coupling between the support structure and the surrounding rock should be ensured under the condition of complex surrounding rock disaster, so that the support system can achieve the best combination.High-strength pre-stressed bolt and anchor cable beam are used to strengthen the roadway with limited yielding pressure, forming a network support unit with high-strength and high-stress bolt as the basic support system and anchor cable as the framework.Through grouting, the stress state of the surrounding rock is changed to improve the bearing capacity, and the 29^#U-type retractable steel support is used to support the secondary support in the special section of the roadway, so that the support body and the surrounding rock of the roadway are coupled.According to the principle of “prevention first, comprehensive treatment”, this paper puts forward the comprehensive water control technology of “concentrated drainage pressure relief + grouting control fissure+shotcreting seal”, which can reduce the influence of roof fissure water and ensure the overall stability of roadway surrounding rock.