公开(公告)号：US10443380B2

公开(公告)日：2019-10-15

申请号：US16319880

申请日：2017-10-31

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Kegong Fan ,  Chunyuan Jing ,  Shengming Niu ,  Deli Fan ,  Chuanwei Zang

IPC: E21D11/00 ,  E21D11/15

Abstract: An asymmetric support structure of entry driven along gob-side (EDG) under unstable roof in deep mines and construction method thereof. The asymmetric support structure includes roadway roof support structure, a gob-side support structure and a solid coal seam-side support structure. The roadway roof support structure includes a reinforcing wire mesh, a W-section steel strap, high-strength pretensioned bolts, and cable bolts and matching steel straps. The gob-side support structure includes a reinforcing wire mesh, a W-section steel strap, high-strength pretensioned yielding bolts and grouting cable bolts and its matching steel straps. The solid coal seam-side support structure includes a reinforcing wire mesh, a reinforced beam and steel strap pallet subassembly, high-strength pretensioned yielding bolts and cable bolts and its matching steel straps. The roadway roof support structure, gob-side support structure and solid coal seam-side support structure beneficially together form the asymmetric support structure.

公开(公告)号：US11746654B2

公开(公告)日：2023-09-05

申请号：US17054677

申请日：2020-03-24

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Qihua Ma ,  Zhongcheng Qin ,  Kegong Fan ,  Jianguo Ning ,  Zhongping Guo ,  Zhijie Wen

IPC: E21C41/18 ,  E21F1/00 ,  E21F13/06

CPC classification number: E21C41/18 ,  E21F1/006 ,  E21F13/06

Abstract: A method is to excavate main roadways in the upper and lower parts separately and an inclined intake roadway in the central part of the mine and pre-excavate an inclined seam roadway as the first mining face at the boundary on one side of the mine. Staring from the mine boundary, the retreating mining shall be carried out on the first mining face strip by strip with belt conveyors arranged in the upper main roadway and assistant conveying devices in the lower main roadway and inclined intake roadway; the open-off cut of the first mining face shall be built on the underside of the upper main roadway at the boundary of the mine to carry out the downward inclined mining on the strike and along the inclination.