|
|
|
| Research on deformation instability mechanism of narrow coal pillar in gob-side entry and collaborative technology of roof cutting and roadway protection |
| Li Yafeng1, Xu Yalong2 |
| 1. Kuqa County Yushuling Coal Mine Co., Ltd., Aksu 843300, China;
2. College of Energy Science and Engineering,Henan Polytechnic University, Jiaozuo 454000, China |
|
|
|
|
Abstract In order to solve the problem of surrounding rock control of narrow coal pillar in gob-side entry, the methods of theoretical analysis, numerical simulation and engineering application were comprehensively applied to reveal the deformation and instability mechanism of narrow coal pillar in gob-side entry. When the size of coal pillar was small, most of the coal body inside the coal pillar almost entered the residual failure stage, and most of the mining stress was transferred to the coal inside the mining side. When the size of coal pillar was large, the coal pillar of roadway protection showed good bearing performance, which leaded to the decrease of mining stress transferred to the coal wall of mining side. Based on this, it was determined that the cooperative support technology of roof cutting and roadway protection was adopted in No. 110505 track crossheading. After field application, the surrounding rock of the test crossheading was controllable as a whole. Therefore, the stability control of No.110505 track crossheading along goaf roadway was realized.
|
|
|
|
|
|
| 1 ] 陈 星，冯美华，尚 楠，等.厚硬顶板宽煤柱临空巷道冲击地压防治技术研究[ J ]. 煤炭工程，2022，54（ 1 ）：84 - 88.
[ 2 ] 郭文豪，曹安业，温颖远，等. 鄂尔多斯矿区典型厚顶宽煤柱采场冲击地压机理[ J ]. 采矿与安全工程学报，2021，38（ 4 ）：720 - 729.
[ 3 ] 王志强，武 超，罗健侨，等. 特厚煤层巨厚顶板分层综采工作面区段煤柱失稳机理及控制[ J ]. 煤炭学报，2021，46（ 12 ）：3 756 - 3 770.
[ 4 ] 杨 虎，蒲平武. 厚煤层留窄煤柱沿空掘巷技术研究与讨论[ J ]. 煤炭科学技术，2021，49（ S2 ）：67 - 70.
[ 5 ] 邹永德. 深井大倾角工作面合理煤柱留设及支护技术实践[ J ]. 煤炭科技，2021，42（ 5 ）：13 - 17，42.
[ 6 ] 侯朝炯，李学华. 综放沿空掘巷围岩大、小结构的稳定性原理[ J ]. 煤炭学报，2001（ 1 ）：1 - 7.
[ 7 ] 张东升，马立强，冯光明，等. 综放巷内充填原位沿空留巷技术[ J ]. 岩石力学与工程学报，2005（ 7 ）：1 164 - 1 168. |
|
|
|
