|
|
|
| Advanced drainage control technology of roof water abundance area in excavation working face |
| Duan Zhihong |
| Lvliangshan Coal and Electricity Co., Ltd., Huozhou Coal and Electricity Group, Lvliang 033102, China |
|
|
|
|
Abstract In order to solve the influence of roof water abundance area of the fully-mechanized excavation roadway on the excavation safety and roadway support, and ensure the safe excavation, the geophysical exploration method was used to clarify the division range of the low-resistance abnormal area, and the directional drilling rig was used to construct the roof drainage drilling hole in the abnormal area. When the water discharge at the orifice was stable at 5 m3/h and below, the whole section of the drilling hole was grouted and sealed, and the water-conducting fractures were filled. During the excavation, the grouting bolt and the rebar bolt were used to reinforce the surrounding rock of the roof. The maximum displacement of the roadway roof after reinforcement was 164 mm, and there was no obvious phenomenon of separation and empty roof.
|
|
|
|
|
|
| [ 1 ] 王华胜，谢鹏飞. 特殊顶板疏放水技术应用探讨[ J ]. 煤炭与化工，2023（ 2 ）：68 - 71.
[ 2 ] 虎维岳，姬亚东，黄 欢. 煤层顶板承压含水层涌水模式与疏放水钻孔优化设计[ J ]. 煤田地质与勘探，2021（ 8 ）：139 - 146.
[ 3 ] 高利军，来 甲，马 壮. 煤层顶板钻孔疏放水技术优化[ J ]. 陕西煤炭，2021（ 1 ）：41 - 46.
[ 4 ] 郑凯凯，吴现帅，钱自卫. 巷道破碎顶板多点渗淋水多层次注浆治理技术[ J ]. 煤炭科技，2022（ 8 ）：168 - 172. |
|
|
|
