Study on deformation destruction characters and controlled technique of roadway in tectonic stress area
Abstract：The stability of surrounding rock of roadway is affected by tectonic stress. Because bolting and shotcreting with mesh ＋ U-steel support cannot keep the stability of eastern main return airway in No. 9 coal mine of Hebi coal stock Co. Ltd. , deformation and failure characters of bolting and grouting support roadway are studied by means of the similar simulation test at different levels of horizontal stress. The test result shows that enforced floor, with the increase of horizontal stress, when the loading is 49 MPa, a little concrete is fallen and block in left shoulder is caving. Otherwise, the floor is stable and only occurs a few cracks, and there is not heave. The effect in roof is obvious and the support structure can contain the deformation of around strata. When the plan is applied in field, mine pressure observation indicates that the most convergence of two walls and top-floor is 144 mm and 105 mm respectively. Thusly, bolting and grouting support improves self-bearing ability of＇surrounding rock and can keep the stability of roadway. The study can provide a reference for road- way support with similar conditions.
Keywords：tectonic stresssimilar simulationbolting and grouting support
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 409-414 )