|
|
|
| Technology of grouting and anchoring integrated control for broken roof in fully mechanized top coal caving face |
| Hao wenmin |
| Shanxi Fenxi Zhengwen Coal Industry Co., Ltd, Lvliang 032300, China |
|
|
|
|
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.
|
|
|
|
|
|
| [ 1 ] 王立新. 锚注技术在深部开采复杂地质条件巷道围岩控制中的应用[ J ]. 山西能源学院学报,2021,34( 4 ):13 - 15.
[ 2 ] 付文军. 断层破碎带煤巷注浆锚索支护技术实践[ J ]. 江西煤炭科技,2021( 3 ):21 - 23.
[ 3 ] 耿耀强,索永录,赵腾飞,等. 基于复合注浆材料的断层破碎区巷道锚注支护[ J ]. 西安科技大学学报,2021,41( 4 ):616 - 623.
[ 4 ] 李永刚. 中空注浆锚索支护在煤矿深部巷道的应用[ J ]. 能源与节能,2021( 7 ):203 - 205.
[ 5 ] 杜永红. 浅谈锚索注浆固化巷道围岩松动圈支护技术[ J ]. 煤,2021,30( 7 ):101 - 102.
[ 6 ] 郭豫宁. 中空注浆锚索在戛达煤矿回风巷支护中的应用[ J ]. 科技创新与应用,2021,11( 19 ):151 - 153,157.
[ 7 ] 马登林. 综放工作面注浆锚索超前支护关键技术[ J ]. 煤炭与化工,2021,44( 6 ):9 - 11,15.
[ 8 ] 徐学标. 破碎围岩巷道注浆加固设计及其效果分析[ J ]. 山东煤炭科技,2021,39( 5 ):57 - 59,62.
[ 9 ] 韩世栋. 破碎围岩巷道变形因素分析及支护优化设计[ J ]. 江西煤炭科技,2021( 2 ):119 - 123.
[ 10 ] 刘东峰. 破碎顶板煤层巷道掘进超前注浆加固技术研究[ J ]. 山西焦煤科技,2021,45( 4 ):31 - 33.
[ 11 ] 梁晓敏,郝兵元. 松散破碎围岩双循环注浆加固试验研究[ J ]. 矿业安全与环保,2021,48( 2 ):12 - 17.
[ 12 ] 楚 超. 综采面过断层泥质破碎带注浆加固技术研究[ J ]. 中国矿山工程,2020,49( 5 ):41 - 43.
[ 13 ] 范文生,王 众. 巷道破碎顶板注浆加固技术研究[ J ]. 山西焦煤科技,2020,44( 10 ):25 - 28,44.
[ 14 ] 张海军. 综放工作面回风巷锚网索联合支护技术优化[ J ]. 江西煤炭科技,2020( 3 ):203 - 205.
[ 15 ] 苏国强. 大采高综放工作面巷道围岩变形特征研究[ J ]. 现代
矿业,2020,36( 5 ):74 - 75,78.
[ 16 ] 韩鸿燕. 综放工作面邻空巷道围岩变形控制方法研究[ J ]. 山西冶金,2019,42( 4 ):50 - 52.
[ 17 ] 侯广志,郝兵元. 厚煤层综放工作面煤巷围岩稳定性分类及支护优化研究[ J ]. 山西煤炭,2019,39( 4 ):18 - 23.
[ 18 ] 李保龙. 特厚煤层综放强采动回采巷道围岩稳定性控制技术研究[ J ]. 煤炭与化工,2019,42( 6 ):18 - 21.
[ 19 ] 卫敏敏. 综放工作面巷道支护技术研究[ J ]. 能源与节能,2019( 04 ):118 - 119,188. |
|
|
|