The Characteristics Of Mesozoic Sandy-Gravel Bed And Its Supporting Measures Within Shajihai Mining Area

In order to solve the problem of roadway surrounding rock control for sandy-gravelbed in Mesozoic, taking Shajihai mine in XinJiang province as the engineeringbackground, engineering geological investigation in the field is conducted. Combingwith indoor physicomechanical and field tests, the mechanical and engineeringcharacteristics of roadway surrounding rock for sandy-gravel bed in Mesozoic areobtained. Theoretical analysis and numerical calculation are used to research thespace-time evolution of deformation characteristics, stress field, displacement field,and penetration field under different penetration conditions, and the deformationmechanism of roadway for sandy-gravel bed in Mesozoic is revealed. Combining withpractical engineering, the dominant factors influencing the stability of roadwaysurrounding rock are determined. On this basis, the control principles for the stabilityof roadway surrounding rock for sandy-gravel bed in Mesozoic and correspondingsupporting measures are put forward. By combining theory with practice, industrialtests are done through supporting plan design and construction process design. And bysetting mine pressure monitoring points, the adaptation condition of supportingstructure and roadway surrounding rock is timely grasped, thus the effectiveness andadaptability of the supporting scheme are verified.