Abstract：Aiming at the problems of low anchorage strength, discontinuity and uncoordinated large deformation of traditional anchor cable for broken roof support of fully mechanized top coal caving roadway, the control concept of using hollow grouting anchor cable in broken roof support to improve the self-bearing performance of broken surrounding rock and realize the integration of anchor cable and surrounding rock anchorage was put forward. The grouting pressure, anchorage performance of anchor cable before and after grouting was studied by theoretical calculation, numerical simulation and field measurement. The results showed that in the support of broken roof roadway, the grouting pressure of hollow grouting anchor cable was 1.2 ~ 1.5 MPa, and the grouting diffusion effect was good. The grouting, anchor bolt, anchor cable and broken surrounding rock formed an integrated support structure, which limited the cracking slip surface, tangential and radial tensile failure and shear failure in the roof surrounding rock, and inhibited the cracking and expansion of surrounding rock, resulting in the reduction or failure of anchor cable anchoring force. The displacement of roadway surrounding rock was small, and the deformation and damage of broken roof surrounding rock in fully mechanized top coal caving face were effectively controlled, which enhanced the anchoring force of anchor bolt and cable and the safety and reliability of anchoring.
郝文敏. 综放工作面破碎顶板注锚一体化控制技术[J]. 煤炭与化工, 2022, 45(3): 12-14，19..
Hao wenmin. Technology of grouting and anchoring integrated control for broken roof in fully mechanized top coal caving face. CCI, 2022, 45(3): 12-14，19..
